From 75e5b3d96d126b52a510ad19e79cf1e4445770e0 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Sun, 5 May 2024 11:06:56 +0200 Subject: [PATCH 001/119] runtime: ignore `yield_calls_park_before_scheduling_again` test (#6537) --- .../tests/loom_current_thread/yield_now.rs | 17 +++++------------ .../tests/loom_multi_thread/yield_now.rs | 1 + .../tests/loom_multi_thread_alt/yield_now.rs | 1 + 3 files changed, 7 insertions(+), 12 deletions(-) diff --git a/tokio/src/runtime/tests/loom_current_thread/yield_now.rs b/tokio/src/runtime/tests/loom_current_thread/yield_now.rs index ba506e5a408..3d454209b24 100644 --- a/tokio/src/runtime/tests/loom_current_thread/yield_now.rs +++ b/tokio/src/runtime/tests/loom_current_thread/yield_now.rs @@ -1,5 +1,4 @@ use crate::runtime::park; -use crate::runtime::tests::loom_oneshot as oneshot; use crate::runtime::{self, Runtime}; #[test] @@ -8,10 +7,9 @@ fn yield_calls_park_before_scheduling_again() { let mut loom = loom::model::Builder::default(); loom.max_permutations = Some(1); loom.check(|| { - let rt = mk_runtime(2); - let (tx, rx) = oneshot::channel::<()>(); + let rt = mk_runtime(); - rt.spawn(async { + let jh = rt.spawn(async { let tid = loom::thread::current().id(); let park_count = park::current_thread_park_count(); @@ -21,17 +19,12 @@ fn yield_calls_park_before_scheduling_again() { let new_park_count = park::current_thread_park_count(); assert_eq!(park_count + 1, new_park_count); } - - tx.send(()); }); - rx.recv(); + rt.block_on(jh).unwrap(); }); } -fn mk_runtime(num_threads: usize) -> Runtime { - runtime::Builder::new_multi_thread() - .worker_threads(num_threads) - .build() - .unwrap() +fn mk_runtime() -> Runtime { + runtime::Builder::new_current_thread().build().unwrap() } diff --git a/tokio/src/runtime/tests/loom_multi_thread/yield_now.rs b/tokio/src/runtime/tests/loom_multi_thread/yield_now.rs index ba506e5a408..f078669ddfa 100644 --- a/tokio/src/runtime/tests/loom_multi_thread/yield_now.rs +++ b/tokio/src/runtime/tests/loom_multi_thread/yield_now.rs @@ -3,6 +3,7 @@ use crate::runtime::tests::loom_oneshot as oneshot; use crate::runtime::{self, Runtime}; #[test] +#[ignore] fn yield_calls_park_before_scheduling_again() { // Don't need to check all permutations let mut loom = loom::model::Builder::default(); diff --git a/tokio/src/runtime/tests/loom_multi_thread_alt/yield_now.rs b/tokio/src/runtime/tests/loom_multi_thread_alt/yield_now.rs index ba506e5a408..f078669ddfa 100644 --- a/tokio/src/runtime/tests/loom_multi_thread_alt/yield_now.rs +++ b/tokio/src/runtime/tests/loom_multi_thread_alt/yield_now.rs @@ -3,6 +3,7 @@ use crate::runtime::tests::loom_oneshot as oneshot; use crate::runtime::{self, Runtime}; #[test] +#[ignore] fn yield_calls_park_before_scheduling_again() { // Don't need to check all permutations let mut loom = loom::model::Builder::default(); From 7f59a6ea859141e9da76dfd77605256a6224ff2c Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Sun, 5 May 2024 17:18:37 +0200 Subject: [PATCH 002/119] tests: remove tests module from integration tests (#6540) --- tokio/tests/task_builder.rs | 135 ++++++++++++++++++------------------ 1 file changed, 67 insertions(+), 68 deletions(-) diff --git a/tokio/tests/task_builder.rs b/tokio/tests/task_builder.rs index 78329ff26a4..c700f229f9f 100644 --- a/tokio/tests/task_builder.rs +++ b/tokio/tests/task_builder.rs @@ -1,81 +1,80 @@ -#[cfg(all(tokio_unstable, feature = "tracing"))] -mod tests { - use std::rc::Rc; - use tokio::{ - task::{Builder, LocalSet}, - test, - }; +#![cfg(all(tokio_unstable, feature = "tracing"))] - #[test] - async fn spawn_with_name() { - let result = Builder::new() - .name("name") - .spawn(async { "task executed" }) - .unwrap() - .await; +use std::rc::Rc; +use tokio::{ + task::{Builder, LocalSet}, + test, +}; - assert_eq!(result.unwrap(), "task executed"); - } +#[test] +async fn spawn_with_name() { + let result = Builder::new() + .name("name") + .spawn(async { "task executed" }) + .unwrap() + .await; - #[test] - async fn spawn_blocking_with_name() { - let result = Builder::new() - .name("name") - .spawn_blocking(|| "task executed") - .unwrap() - .await; + assert_eq!(result.unwrap(), "task executed"); +} + +#[test] +async fn spawn_blocking_with_name() { + let result = Builder::new() + .name("name") + .spawn_blocking(|| "task executed") + .unwrap() + .await; - assert_eq!(result.unwrap(), "task executed"); - } + assert_eq!(result.unwrap(), "task executed"); +} - #[test] - async fn spawn_local_with_name() { - let unsend_data = Rc::new("task executed"); - let result = LocalSet::new() - .run_until(async move { - Builder::new() - .name("name") - .spawn_local(async move { unsend_data }) - .unwrap() - .await - }) - .await; +#[test] +async fn spawn_local_with_name() { + let unsend_data = Rc::new("task executed"); + let result = LocalSet::new() + .run_until(async move { + Builder::new() + .name("name") + .spawn_local(async move { unsend_data }) + .unwrap() + .await + }) + .await; - assert_eq!(*result.unwrap(), "task executed"); - } + assert_eq!(*result.unwrap(), "task executed"); +} - #[test] - async fn spawn_without_name() { - let result = Builder::new() - .spawn(async { "task executed" }) - .unwrap() - .await; +#[test] +async fn spawn_without_name() { + let result = Builder::new() + .spawn(async { "task executed" }) + .unwrap() + .await; - assert_eq!(result.unwrap(), "task executed"); - } + assert_eq!(result.unwrap(), "task executed"); +} - #[test] - async fn spawn_blocking_without_name() { - let result = Builder::new() - .spawn_blocking(|| "task executed") - .unwrap() - .await; +#[test] +async fn spawn_blocking_without_name() { + let result = Builder::new() + .spawn_blocking(|| "task executed") + .unwrap() + .await; - assert_eq!(result.unwrap(), "task executed"); - } + assert_eq!(result.unwrap(), "task executed"); +} - #[test] - async fn spawn_local_without_name() { - let unsend_data = Rc::new("task executed"); - let result = LocalSet::new() - .run_until(async move { - Builder::new() - .spawn_local(async move { unsend_data }) - .unwrap() - .await - }) - .await; +#[test] +async fn spawn_local_without_name() { + let unsend_data = Rc::new("task executed"); + let result = LocalSet::new() + .run_until(async move { + Builder::new() + .spawn_local(async move { unsend_data }) + .unwrap() + .await + }) + .await; - assert_eq!(*result.unwrap(), "task executed"); - } + assert_eq!(*result.unwrap(), "task executed"); } From b652a4e64c3547af62c91f55d8fcbc3be0333d6e Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Sun, 5 May 2024 17:18:49 +0200 Subject: [PATCH 003/119] util: no default features for hashbrown (#6541) --- tokio-util/Cargo.toml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tokio-util/Cargo.toml b/tokio-util/Cargo.toml index 13e56dd8511..a33e9c9cff7 100644 --- a/tokio-util/Cargo.toml +++ b/tokio-util/Cargo.toml @@ -45,7 +45,7 @@ slab = { version = "0.4.4", optional = true } # Backs `DelayQueue` tracing = { version = "0.1.25", default-features = false, features = ["std"], optional = true } [target.'cfg(tokio_unstable)'.dependencies] -hashbrown = { version = "0.14.0", optional = true } +hashbrown = { version = "0.14.0", default-features = false, optional = true } [dev-dependencies] tokio = { version = "1.0.0", path = "../tokio", features = ["full"] } From 2a0df5fb05ae1a624fe2f6db756190f41812214b Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Sun, 5 May 2024 17:43:11 +0200 Subject: [PATCH 004/119] ci: bump nightly to nightly-2024-05-05 (#6538) --- .cirrus.yml | 2 +- .github/workflows/ci.yml | 19 ++++++++++++++++++- target-specs/README.md | 9 +++++++++ target-specs/i686-unknown-linux-gnu.json | 22 ++++++++++++++-------- tokio-macros/src/lib.rs | 1 + tokio-stream/src/lib.rs | 1 + tokio-test/src/lib.rs | 1 + tokio-util/src/codec/length_delimited.rs | 1 - tokio-util/src/lib.rs | 1 + tokio-util/tests/task_join_map.rs | 1 + tokio/src/lib.rs | 9 +++------ tokio/src/signal/mod.rs | 2 ++ tokio/src/signal/unix.rs | 2 ++ tokio/tests/_require_full.rs | 2 ++ tokio/tests/dump.rs | 1 + tokio/tests/fs_open_options.rs | 7 ++++++- tokio/tests/macros_select.rs | 1 + tokio/tests/rt_basic.rs | 1 + tokio/tests/rt_common.rs | 1 + tokio/tests/rt_handle.rs | 1 + tokio/tests/rt_metrics.rs | 1 + tokio/tests/rt_threaded.rs | 1 + tokio/tests/rt_threaded_alt.rs | 1 + tokio/tests/task_abort.rs | 2 ++ tokio/tests/task_builder.rs | 1 + tokio/tests/task_id.rs | 1 + tokio/tests/task_join_set.rs | 1 + tokio/tests/task_local_set.rs | 1 + tokio/tests/task_yield_now.rs | 1 + 29 files changed, 77 insertions(+), 18 deletions(-) create mode 100644 target-specs/README.md diff --git a/.cirrus.yml b/.cirrus.yml index 8aea3efa74b..bdf3af74098 100644 --- a/.cirrus.yml +++ b/.cirrus.yml @@ -4,7 +4,7 @@ freebsd_instance: image_family: freebsd-14-0 env: RUST_STABLE: stable - RUST_NIGHTLY: nightly-2023-10-21 + RUST_NIGHTLY: nightly-2024-05-05 RUSTFLAGS: -D warnings # Test FreeBSD in a full VM on cirrus-ci.com. Test the i686 target too, in the diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 4f5e9004959..1d799a54083 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -15,7 +15,7 @@ env: RUST_BACKTRACE: 1 # Change to specific Rust release to pin rust_stable: stable - rust_nightly: nightly-2023-10-21 + rust_nightly: nightly-2024-05-05 rust_clippy: '1.77' # When updating this, also update: # - README.md @@ -995,6 +995,23 @@ jobs: run: cargo check-external-types --all-features working-directory: tokio + check-unexpected-lints-cfgs: + name: check unexpected lints and cfgs + needs: basics + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - name: Install Rust ${{ env.rust_nightly }} + uses: dtolnay/rust-toolchain@master + with: + toolchain: ${{ env.rust_nightly }} + - name: don't allow warnings + run: sed -i '/#!\[allow(unknown_lints, unexpected_cfgs)\]/d' */src/lib.rs */tests/*.rs + - name: check for unknown lints and cfgs + run: cargo check --all-features --tests + env: + RUSTFLAGS: -Dwarnings --check-cfg=cfg(loom,tokio_unstable,tokio_taskdump,fuzzing,mio_unsupported_force_poll_poll,tokio_internal_mt_counters,fs,tokio_no_parking_lot,tokio_no_tuning_tests) -Funexpected_cfgs -Funknown_lints + check-fuzzing: name: check-fuzzing needs: basics diff --git a/target-specs/README.md b/target-specs/README.md new file mode 100644 index 00000000000..f5db16b78c5 --- /dev/null +++ b/target-specs/README.md @@ -0,0 +1,9 @@ +This is used for the `no-atomic-u64-test` ci check that verifies that Tokio +works even if the `AtomicU64` type is missing. + +When increasing the nightly compiler version, you may need to regenerate this +target using the following command: +``` +rustc +nightly -Z unstable-options --print target-spec-json --target i686-unknown-linux-gnu | grep -v 'is-builtin' | sed 's/"max-atomic-width": 64/"max-atomic-width": 32/' > target-specs/i686-unknown-linux-gnu.json +``` + diff --git a/target-specs/i686-unknown-linux-gnu.json b/target-specs/i686-unknown-linux-gnu.json index 4eebe7afb57..7a70e7474f3 100644 --- a/target-specs/i686-unknown-linux-gnu.json +++ b/target-specs/i686-unknown-linux-gnu.json @@ -1,29 +1,35 @@ { "arch": "x86", "cpu": "pentium4", + "crt-objects-fallback": "false", "crt-static-respected": true, - "data-layout": "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-f64:32:64-f80:32-n8:16:32-S128", + "data-layout": "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-i128:128-f64:32:64-f80:32-n8:16:32-S128", "dynamic-linking": true, "env": "gnu", "has-rpath": true, "has-thread-local": true, + "linker-flavor": "gnu-cc", "llvm-target": "i686-unknown-linux-gnu", "max-atomic-width": 32, + "metadata": { + "description": null, + "host_tools": null, + "std": null, + "tier": null + }, "os": "linux", "position-independent-executables": true, "pre-link-args": { - "gcc": [ + "gnu-cc": [ + "-m32" + ], + "gnu-lld-cc": [ "-m32" ] }, "relro-level": "full", "stack-probes": { - "kind": "inline-or-call", - "min-llvm-version-for-inline": [ - 16, - 0, - 0 - ] + "kind": "inline" }, "supported-sanitizers": [ "address" diff --git a/tokio-macros/src/lib.rs b/tokio-macros/src/lib.rs index ab7b083d381..c108d8c46a2 100644 --- a/tokio-macros/src/lib.rs +++ b/tokio-macros/src/lib.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![allow(clippy::needless_doctest_main)] #![warn( missing_debug_implementations, diff --git a/tokio-stream/src/lib.rs b/tokio-stream/src/lib.rs index 6ff1085a552..11ccd8c6aee 100644 --- a/tokio-stream/src/lib.rs +++ b/tokio-stream/src/lib.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![allow( clippy::cognitive_complexity, clippy::large_enum_variant, diff --git a/tokio-test/src/lib.rs b/tokio-test/src/lib.rs index 87e63861210..9f60faf7952 100644 --- a/tokio-test/src/lib.rs +++ b/tokio-test/src/lib.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![warn( missing_debug_implementations, missing_docs, diff --git a/tokio-util/src/codec/length_delimited.rs b/tokio-util/src/codec/length_delimited.rs index 92d76b2cd28..c37f5863bd4 100644 --- a/tokio-util/src/codec/length_delimited.rs +++ b/tokio-util/src/codec/length_delimited.rs @@ -639,7 +639,6 @@ mod builder { impl LengthFieldType for u64 {} #[cfg(any( - target_pointer_width = "8", target_pointer_width = "16", target_pointer_width = "32", target_pointer_width = "64", diff --git a/tokio-util/src/lib.rs b/tokio-util/src/lib.rs index 1df4de1b459..34f69fd14e3 100644 --- a/tokio-util/src/lib.rs +++ b/tokio-util/src/lib.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![allow(clippy::needless_doctest_main)] #![warn( missing_debug_implementations, diff --git a/tokio-util/tests/task_join_map.rs b/tokio-util/tests/task_join_map.rs index 1ab5f9ba832..8757f8b5c6e 100644 --- a/tokio-util/tests/task_join_map.rs +++ b/tokio-util/tests/task_join_map.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![warn(rust_2018_idioms)] #![cfg(all(feature = "rt", tokio_unstable))] diff --git a/tokio/src/lib.rs b/tokio/src/lib.rs index 52b098986fb..f15f8763e36 100644 --- a/tokio/src/lib.rs +++ b/tokio/src/lib.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![allow( clippy::cognitive_complexity, clippy::large_enum_variant, @@ -446,13 +447,9 @@ // least 32 bits, which a lot of components in Tokio currently assumes. // // TODO: improve once we have MSRV access to const eval to make more flexible. -#[cfg(not(any( - target_pointer_width = "32", - target_pointer_width = "64", - target_pointer_width = "128" -)))] +#[cfg(not(any(target_pointer_width = "32", target_pointer_width = "64")))] compile_error! { - "Tokio requires the platform pointer width to be 32, 64, or 128 bits" + "Tokio requires the platform pointer width to be at least 32 bits" } #[cfg(all( diff --git a/tokio/src/signal/mod.rs b/tokio/src/signal/mod.rs index 59f71db0e46..5778f22ed12 100644 --- a/tokio/src/signal/mod.rs +++ b/tokio/src/signal/mod.rs @@ -45,7 +45,9 @@ use crate::sync::watch::Receiver; use std::task::{Context, Poll}; +#[cfg(feature = "signal")] mod ctrl_c; +#[cfg(feature = "signal")] pub use ctrl_c::ctrl_c; pub(crate) mod registry; diff --git a/tokio/src/signal/unix.rs b/tokio/src/signal/unix.rs index 52a9cbaac40..c4a196a660f 100644 --- a/tokio/src/signal/unix.rs +++ b/tokio/src/signal/unix.rs @@ -485,10 +485,12 @@ impl Signal { } // Work around for abstracting streams internally +#[cfg(feature = "process")] pub(crate) trait InternalStream { fn poll_recv(&mut self, cx: &mut Context<'_>) -> Poll>; } +#[cfg(feature = "process")] impl InternalStream for Signal { fn poll_recv(&mut self, cx: &mut Context<'_>) -> Poll> { self.poll_recv(cx) diff --git a/tokio/tests/_require_full.rs b/tokio/tests/_require_full.rs index d33943a960d..81c25179615 100644 --- a/tokio/tests/_require_full.rs +++ b/tokio/tests/_require_full.rs @@ -1,3 +1,5 @@ +#![allow(unknown_lints, unexpected_cfgs)] + #[cfg(not(any(feature = "full", target_family = "wasm")))] compile_error!("run main Tokio tests with `--features full`"); diff --git a/tokio/tests/dump.rs b/tokio/tests/dump.rs index c946f38436c..68b53aaf291 100644 --- a/tokio/tests/dump.rs +++ b/tokio/tests/dump.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![cfg(all( tokio_unstable, tokio_taskdump, diff --git a/tokio/tests/fs_open_options.rs b/tokio/tests/fs_open_options.rs index 41cfb45460c..84b63a504cf 100644 --- a/tokio/tests/fs_open_options.rs +++ b/tokio/tests/fs_open_options.rs @@ -55,8 +55,13 @@ async fn open_options_create_new() { #[tokio::test] #[cfg(unix)] async fn open_options_mode() { + let mode = format!("{:?}", OpenOptions::new().mode(0o644)); // TESTING HACK: use Debug output to check the stored data - assert!(format!("{:?}", OpenOptions::new().mode(0o644)).contains("mode: 420 ")); + assert!( + mode.contains("mode: 420 ") || mode.contains("mode: 0o000644 "), + "mode is: {}", + mode + ); } #[tokio::test] diff --git a/tokio/tests/macros_select.rs b/tokio/tests/macros_select.rs index f65cbdf2267..cbad971ab1f 100644 --- a/tokio/tests/macros_select.rs +++ b/tokio/tests/macros_select.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![cfg(feature = "macros")] #![allow(clippy::disallowed_names)] diff --git a/tokio/tests/rt_basic.rs b/tokio/tests/rt_basic.rs index 47bf2dfdc12..a5204bd83f7 100644 --- a/tokio/tests/rt_basic.rs +++ b/tokio/tests/rt_basic.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![warn(rust_2018_idioms)] #![cfg(feature = "full")] diff --git a/tokio/tests/rt_common.rs b/tokio/tests/rt_common.rs index a71fc4a735e..75a20057166 100644 --- a/tokio/tests/rt_common.rs +++ b/tokio/tests/rt_common.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![allow(clippy::needless_range_loop)] #![warn(rust_2018_idioms)] #![cfg(feature = "full")] diff --git a/tokio/tests/rt_handle.rs b/tokio/tests/rt_handle.rs index 92fa777e321..9efe9b4bde9 100644 --- a/tokio/tests/rt_handle.rs +++ b/tokio/tests/rt_handle.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![warn(rust_2018_idioms)] #![cfg(feature = "full")] diff --git a/tokio/tests/rt_metrics.rs b/tokio/tests/rt_metrics.rs index 4dfed06fed4..58869c530ae 100644 --- a/tokio/tests/rt_metrics.rs +++ b/tokio/tests/rt_metrics.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![warn(rust_2018_idioms)] #![cfg(all(feature = "full", tokio_unstable, not(target_os = "wasi")))] diff --git a/tokio/tests/rt_threaded.rs b/tokio/tests/rt_threaded.rs index 6e769fc831f..26690550f93 100644 --- a/tokio/tests/rt_threaded.rs +++ b/tokio/tests/rt_threaded.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![warn(rust_2018_idioms)] #![cfg(all(feature = "full", not(target_os = "wasi")))] diff --git a/tokio/tests/rt_threaded_alt.rs b/tokio/tests/rt_threaded_alt.rs index 8b7143b2f97..9eed1fe78b6 100644 --- a/tokio/tests/rt_threaded_alt.rs +++ b/tokio/tests/rt_threaded_alt.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![warn(rust_2018_idioms)] #![cfg(all(feature = "full", not(target_os = "wasi")))] #![cfg(tokio_unstable)] diff --git a/tokio/tests/task_abort.rs b/tokio/tests/task_abort.rs index 481cc96f2ef..09414f094ed 100644 --- a/tokio/tests/task_abort.rs +++ b/tokio/tests/task_abort.rs @@ -7,8 +7,10 @@ use tokio::time::Duration; use tokio::runtime::Builder; +#[cfg(panic = "unwind")] struct PanicOnDrop; +#[cfg(panic = "unwind")] impl Drop for PanicOnDrop { fn drop(&mut self) { panic!("Well what did you expect would happen..."); diff --git a/tokio/tests/task_builder.rs b/tokio/tests/task_builder.rs index c700f229f9f..4d1248500ab 100644 --- a/tokio/tests/task_builder.rs +++ b/tokio/tests/task_builder.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![cfg(all(tokio_unstable, feature = "tracing"))] use std::rc::Rc; diff --git a/tokio/tests/task_id.rs b/tokio/tests/task_id.rs index 95e48f4901d..574a050b0c1 100644 --- a/tokio/tests/task_id.rs +++ b/tokio/tests/task_id.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![warn(rust_2018_idioms)] #![cfg(all(feature = "full", tokio_unstable))] diff --git a/tokio/tests/task_join_set.rs b/tokio/tests/task_join_set.rs index 8a42be17b49..e87135337ba 100644 --- a/tokio/tests/task_join_set.rs +++ b/tokio/tests/task_join_set.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![warn(rust_2018_idioms)] #![cfg(feature = "full")] diff --git a/tokio/tests/task_local_set.rs b/tokio/tests/task_local_set.rs index d965eb341eb..ac46291a36c 100644 --- a/tokio/tests/task_local_set.rs +++ b/tokio/tests/task_local_set.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![warn(rust_2018_idioms)] #![cfg(feature = "full")] diff --git a/tokio/tests/task_yield_now.rs b/tokio/tests/task_yield_now.rs index b16bca52819..3cb8cb16e70 100644 --- a/tokio/tests/task_yield_now.rs +++ b/tokio/tests/task_yield_now.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![cfg(all(feature = "full", tokio_unstable))] use tokio::task; From 6fcd9c02176bf3cd570bc7de88edaa3b95ea480a Mon Sep 17 00:00:00 2001 From: Kezhu Wang Date: Mon, 6 May 2024 00:28:59 +0800 Subject: [PATCH 005/119] macros: make #[tokio::test] append #[test] at the end of the attribute list (#6497) --- .../tests/fail/macros_invalid_input.rs | 20 +++++++++ .../tests/fail/macros_invalid_input.stderr | 38 ++++++++++++---- tokio-macros/src/entry.rs | 44 ++++++++++++++++--- 3 files changed, 86 insertions(+), 16 deletions(-) diff --git a/tests-build/tests/fail/macros_invalid_input.rs b/tests-build/tests/fail/macros_invalid_input.rs index 99daf00b4f9..85b4924f225 100644 --- a/tests-build/tests/fail/macros_invalid_input.rs +++ b/tests-build/tests/fail/macros_invalid_input.rs @@ -45,4 +45,24 @@ async fn test_crate_not_path_invalid() {} #[test] async fn test_has_second_test_attr() {} +#[tokio::test] +#[::core::prelude::v1::test] +async fn test_has_second_test_attr_v1() {} + +#[tokio::test] +#[core::prelude::rust_2015::test] +async fn test_has_second_test_attr_rust_2015() {} + +#[tokio::test] +#[::std::prelude::rust_2018::test] +async fn test_has_second_test_attr_rust_2018() {} + +#[tokio::test] +#[std::prelude::rust_2021::test] +async fn test_has_second_test_attr_rust_2021() {} + +#[tokio::test] +#[tokio::test] +async fn test_has_generated_second_test_attr() {} + fn main() {} diff --git a/tests-build/tests/fail/macros_invalid_input.stderr b/tests-build/tests/fail/macros_invalid_input.stderr index 0c8d65fc159..11f95315cdf 100644 --- a/tests-build/tests/fail/macros_invalid_input.stderr +++ b/tests-build/tests/fail/macros_invalid_input.stderr @@ -76,20 +76,40 @@ error: Failed to parse value of `crate` as path: "456" 41 | #[tokio::test(crate = "456")] | ^^^^^ -error: second test attribute is supplied +error: second test attribute is supplied, consider removing or changing the order of your test attributes --> $DIR/macros_invalid_input.rs:45:1 | 45 | #[test] | ^^^^^^^ -error: duplicated attribute - --> $DIR/macros_invalid_input.rs:45:1 +error: second test attribute is supplied, consider removing or changing the order of your test attributes + --> $DIR/macros_invalid_input.rs:49:1 | -45 | #[test] - | ^^^^^^^ +49 | #[::core::prelude::v1::test] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: second test attribute is supplied, consider removing or changing the order of your test attributes + --> $DIR/macros_invalid_input.rs:53:1 + | +53 | #[core::prelude::rust_2015::test] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: second test attribute is supplied, consider removing or changing the order of your test attributes + --> $DIR/macros_invalid_input.rs:57:1 + | +57 | #[::std::prelude::rust_2018::test] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: second test attribute is supplied, consider removing or changing the order of your test attributes + --> $DIR/macros_invalid_input.rs:61:1 + | +61 | #[std::prelude::rust_2021::test] + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: second test attribute is supplied, consider removing or changing the order of your test attributes + --> $DIR/macros_invalid_input.rs:64:1 | -note: the lint level is defined here - --> $DIR/macros_invalid_input.rs:1:9 +64 | #[tokio::test] + | ^^^^^^^^^^^^^^ | -1 | #![deny(duplicate_macro_attributes)] - | ^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: this error originates in the attribute macro `tokio::test` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/tokio-macros/src/entry.rs b/tokio-macros/src/entry.rs index 20cbdb1c92a..8858c8a1674 100644 --- a/tokio-macros/src/entry.rs +++ b/tokio-macros/src/entry.rs @@ -360,7 +360,7 @@ fn parse_knobs(mut input: ItemFn, is_test: bool, config: FinalConfig) -> TokenSt rt = quote_spanned! {last_stmt_start_span=> #rt.start_paused(#v) }; } - let header = if is_test { + let generated_attrs = if is_test { quote! { #[::core::prelude::v1::test] } @@ -410,7 +410,7 @@ fn parse_knobs(mut input: ItemFn, is_test: bool, config: FinalConfig) -> TokenSt } }; - input.into_tokens(header, body, last_block) + input.into_tokens(generated_attrs, body, last_block) } fn token_stream_with_error(mut tokens: TokenStream, error: syn::Error) -> TokenStream { @@ -442,6 +442,35 @@ pub(crate) fn main(args: TokenStream, item: TokenStream, rt_multi_thread: bool) } } +// Check whether given attribute is a test attribute of forms: +// * `#[test]` +// * `#[core::prelude::*::test]` or `#[::core::prelude::*::test]` +// * `#[std::prelude::*::test]` or `#[::std::prelude::*::test]` +fn is_test_attribute(attr: &Attribute) -> bool { + let path = match &attr.meta { + syn::Meta::Path(path) => path, + _ => return false, + }; + let candidates = [ + ["core", "prelude", "*", "test"], + ["std", "prelude", "*", "test"], + ]; + if path.leading_colon.is_none() + && path.segments.len() == 1 + && path.segments[0].arguments.is_none() + && path.segments[0].ident == "test" + { + return true; + } else if path.segments.len() != candidates[0].len() { + return false; + } + candidates.into_iter().any(|segments| { + path.segments.iter().zip(segments).all(|(segment, path)| { + segment.arguments.is_none() && (path == "*" || segment.ident == path) + }) + }) +} + pub(crate) fn test(args: TokenStream, item: TokenStream, rt_multi_thread: bool) -> TokenStream { // If any of the steps for this macro fail, we still want to expand to an item that is as close // to the expected output as possible. This helps out IDEs such that completions and other @@ -450,8 +479,8 @@ pub(crate) fn test(args: TokenStream, item: TokenStream, rt_multi_thread: bool) Ok(it) => it, Err(e) => return token_stream_with_error(item, e), }; - let config = if let Some(attr) = input.attrs().find(|attr| attr.meta.path().is_ident("test")) { - let msg = "second test attribute is supplied"; + let config = if let Some(attr) = input.attrs().find(|attr| is_test_attribute(attr)) { + let msg = "second test attribute is supplied, consider removing or changing the order of your test attributes"; Err(syn::Error::new_spanned(attr, msg)) } else { AttributeArgs::parse_terminated @@ -492,13 +521,11 @@ impl ItemFn { /// Convert our local function item into a token stream. fn into_tokens( self, - header: proc_macro2::TokenStream, + generated_attrs: proc_macro2::TokenStream, body: proc_macro2::TokenStream, last_block: proc_macro2::TokenStream, ) -> TokenStream { let mut tokens = proc_macro2::TokenStream::new(); - header.to_tokens(&mut tokens); - // Outer attributes are simply streamed as-is. for attr in self.outer_attrs { attr.to_tokens(&mut tokens); @@ -512,6 +539,9 @@ impl ItemFn { attr.to_tokens(&mut tokens); } + // Add generated macros at the end, so macros processed later are aware of them. + generated_attrs.to_tokens(&mut tokens); + self.vis.to_tokens(&mut tokens); self.sig.to_tokens(&mut tokens); From 227979f0918b2fa8f70ac6040d6281a9e1365641 Mon Sep 17 00:00:00 2001 From: Sebastian Schildt Date: Tue, 14 May 2024 20:11:37 +0900 Subject: [PATCH 006/119] net: support QNX OS (#6421) Co-authored-by: Akhil Thankachan Thomas --- tokio/src/net/unix/ucred.rs | 4 ++-- tokio/src/process/mod.rs | 4 ++++ 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/tokio/src/net/unix/ucred.rs b/tokio/src/net/unix/ucred.rs index 3390819160a..bcd1c755f6a 100644 --- a/tokio/src/net/unix/ucred.rs +++ b/tokio/src/net/unix/ucred.rs @@ -39,7 +39,7 @@ impl UCred { ))] pub(crate) use self::impl_linux::get_peer_cred; -#[cfg(target_os = "netbsd")] +#[cfg(any(target_os = "netbsd", target_os = "nto"))] pub(crate) use self::impl_netbsd::get_peer_cred; #[cfg(any(target_os = "dragonfly", target_os = "freebsd"))] @@ -120,7 +120,7 @@ pub(crate) mod impl_linux { } } -#[cfg(target_os = "netbsd")] +#[cfg(any(target_os = "netbsd", target_os = "nto"))] pub(crate) mod impl_netbsd { use crate::net::unix::{self, UnixStream}; diff --git a/tokio/src/process/mod.rs b/tokio/src/process/mod.rs index 0fad67cd01a..fc661d89c1f 100644 --- a/tokio/src/process/mod.rs +++ b/tokio/src/process/mod.rs @@ -672,6 +672,8 @@ impl Command { #[cfg(unix)] #[cfg_attr(docsrs, doc(cfg(unix)))] pub fn uid(&mut self, id: u32) -> &mut Command { + #[cfg(target_os = "nto")] + let id = id as i32; self.std.uid(id); self } @@ -681,6 +683,8 @@ impl Command { #[cfg(unix)] #[cfg_attr(docsrs, doc(cfg(unix)))] pub fn gid(&mut self, id: u32) -> &mut Command { + #[cfg(target_os = "nto")] + let id = id as i32; self.std.gid(id); self } From d085260ee02f25c4a56cfcd9d0b57fa15840aebb Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Tue, 14 May 2024 23:01:49 +0200 Subject: [PATCH 007/119] metrics: fix flaky injection_queue_depth test (#6559) --- tokio/tests/rt_metrics.rs | 46 +++++++++++++++------------------------ 1 file changed, 18 insertions(+), 28 deletions(-) diff --git a/tokio/tests/rt_metrics.rs b/tokio/tests/rt_metrics.rs index 58869c530ae..7f0c9ad8052 100644 --- a/tokio/tests/rt_metrics.rs +++ b/tokio/tests/rt_metrics.rs @@ -3,7 +3,7 @@ #![cfg(all(feature = "full", tokio_unstable, not(target_os = "wasi")))] use std::future::Future; -use std::sync::{Arc, Mutex}; +use std::sync::{Arc, Barrier, Mutex}; use std::task::Poll; use tokio::macros::support::poll_fn; @@ -504,7 +504,7 @@ fn worker_overflow_count() { } #[test] -fn injection_queue_depth() { +fn injection_queue_depth_current_thread() { use std::thread; let rt = current_thread(); @@ -518,44 +518,34 @@ fn injection_queue_depth() { .unwrap(); assert_eq!(1, metrics.injection_queue_depth()); +} +#[test] +fn injection_queue_depth_multi_thread() { let rt = threaded(); - let handle = rt.handle().clone(); let metrics = rt.metrics(); - // First we need to block the runtime workers - let (tx1, rx1) = std::sync::mpsc::channel(); - let (tx2, rx2) = std::sync::mpsc::channel(); - let (tx3, rx3) = std::sync::mpsc::channel(); - let rx3 = Arc::new(Mutex::new(rx3)); + let barrier1 = Arc::new(Barrier::new(3)); + let barrier2 = Arc::new(Barrier::new(3)); - rt.spawn(async move { rx1.recv().unwrap() }); - rt.spawn(async move { rx2.recv().unwrap() }); - - // Spawn some more to make sure there are items - for _ in 0..10 { - let rx = rx3.clone(); + // Spawn a task per runtime worker to block it. + for _ in 0..2 { + let barrier1 = barrier1.clone(); + let barrier2 = barrier2.clone(); rt.spawn(async move { - rx.lock().unwrap().recv().unwrap(); + barrier1.wait(); + barrier2.wait(); }); } - thread::spawn(move || { - handle.spawn(async {}); - }) - .join() - .unwrap(); + barrier1.wait(); - let n = metrics.injection_queue_depth(); - assert!(1 <= n, "{}", n); - assert!(15 >= n, "{}", n); - - for _ in 0..10 { - tx3.send(()).unwrap(); + for i in 0..10 { + assert_eq!(i, metrics.injection_queue_depth()); + rt.spawn(async {}); } - tx1.send(()).unwrap(); - tx2.send(()).unwrap(); + barrier2.wait(); } #[test] From df7706348554a039946925f7492d98e31bd46a85 Mon Sep 17 00:00:00 2001 From: Weijia Jiang Date: Wed, 15 May 2024 15:32:39 +0800 Subject: [PATCH 008/119] time: remove the `true_when` field in `TimerShared` (#6563) --- tokio/src/runtime/time/entry.rs | 5 ----- 1 file changed, 5 deletions(-) diff --git a/tokio/src/runtime/time/entry.rs b/tokio/src/runtime/time/entry.rs index a6be0e62a13..7991ee0dc0a 100644 --- a/tokio/src/runtime/time/entry.rs +++ b/tokio/src/runtime/time/entry.rs @@ -339,9 +339,6 @@ pub(crate) struct TimerShared { /// registered. cached_when: AtomicU64, - /// The true expiration time. Set by the timer future, read by the driver. - true_when: AtomicU64, - /// Current state. This records whether the timer entry is currently under /// the ownership of the driver, and if not, its current state (not /// complete, fired, error, etc). @@ -356,7 +353,6 @@ unsafe impl Sync for TimerShared {} impl std::fmt::Debug for TimerShared { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { f.debug_struct("TimerShared") - .field("when", &self.true_when.load(Ordering::Relaxed)) .field("cached_when", &self.cached_when.load(Ordering::Relaxed)) .field("state", &self.state) .finish() @@ -375,7 +371,6 @@ impl TimerShared { pub(super) fn new() -> Self { Self { cached_when: AtomicU64::new(0), - true_when: AtomicU64::new(0), pointers: linked_list::Pointers::new(), state: StateCell::default(), _p: PhantomPinned, From 18e048d7646e62ce893d606996fc91b983386def Mon Sep 17 00:00:00 2001 From: William Wen <44139337+wenym1@users.noreply.github.com> Date: Wed, 15 May 2024 19:57:35 +0800 Subject: [PATCH 009/119] sync: always drop message in destructor for oneshot receiver (#6558) --- tokio/src/sync/oneshot.rs | 22 +++++++++++-- tokio/src/sync/tests/loom_oneshot.rs | 47 ++++++++++++++++++++++++++++ 2 files changed, 67 insertions(+), 2 deletions(-) diff --git a/tokio/src/sync/oneshot.rs b/tokio/src/sync/oneshot.rs index 9e8c3fcb7f7..ab29b3e3edd 100644 --- a/tokio/src/sync/oneshot.rs +++ b/tokio/src/sync/oneshot.rs @@ -1072,7 +1072,14 @@ impl Receiver { impl Drop for Receiver { fn drop(&mut self) { if let Some(inner) = self.inner.as_ref() { - inner.close(); + let state = inner.close(); + + if state.is_complete() { + // SAFETY: we have ensured that the `VALUE_SENT` bit has been set, + // so only the receiver can access the value. + drop(unsafe { inner.consume_value() }); + } + #[cfg(all(tokio_unstable, feature = "tracing"))] self.resource_span.in_scope(|| { tracing::trace!( @@ -1202,7 +1209,7 @@ impl Inner { } /// Called by `Receiver` to indicate that the value will never be received. - fn close(&self) { + fn close(&self) -> State { let prev = State::set_closed(&self.state); if prev.is_tx_task_set() && !prev.is_complete() { @@ -1210,6 +1217,8 @@ impl Inner { self.tx_task.with_task(Waker::wake_by_ref); } } + + prev } /// Consumes the value. This function does not check `state`. @@ -1248,6 +1257,15 @@ impl Drop for Inner { self.tx_task.drop_task(); } } + + // SAFETY: we have `&mut self`, and therefore we have + // exclusive access to the value. + unsafe { + // Note: the assertion holds because if the value has been sent by sender, + // we must ensure that the value must have been consumed by the receiver before + // dropping the `Inner`. + debug_assert!(self.consume_value().is_none()); + } } } diff --git a/tokio/src/sync/tests/loom_oneshot.rs b/tokio/src/sync/tests/loom_oneshot.rs index c5f79720794..717edcfd2a3 100644 --- a/tokio/src/sync/tests/loom_oneshot.rs +++ b/tokio/src/sync/tests/loom_oneshot.rs @@ -138,3 +138,50 @@ fn changing_tx_task() { } }); } + +#[test] +fn checking_tx_send_ok_not_drop() { + use std::borrow::Borrow; + use std::cell::Cell; + + loom::thread_local! { + static IS_RX: Cell = Cell::new(true); + } + + struct Msg; + + impl Drop for Msg { + fn drop(&mut self) { + IS_RX.with(|is_rx: &Cell<_>| { + // On `tx.send(msg)` returning `Err(msg)`, + // we call `std::mem::forget(msg)`, so that + // `drop` is not expected to be called in the + // tx thread. + assert!(is_rx.get()); + }); + } + } + + let mut builder = loom::model::Builder::new(); + builder.preemption_bound = Some(2); + + builder.check(|| { + let (tx, rx) = oneshot::channel(); + + // tx thread + let tx_thread_join_handle = thread::spawn(move || { + // Ensure that `Msg::drop` in this thread will see is_rx == false + IS_RX.with(|is_rx: &Cell<_>| { + is_rx.set(false); + }); + if let Err(msg) = tx.send(Msg) { + std::mem::forget(msg); + } + }); + + // main thread is the rx thread + drop(rx); + + tx_thread_join_handle.join().unwrap(); + }); +} From ced7739f69498a702640211bfbaeddb7e864b3d2 Mon Sep 17 00:00:00 2001 From: John-John Tedro Date: Thu, 16 May 2024 10:30:48 +0200 Subject: [PATCH 010/119] tokio: use `ptr::addr_of` instead of pointer arithmetic in linked_list (#6561) --- tokio/src/util/linked_list.rs | 45 ++++++++++------------------------- 1 file changed, 12 insertions(+), 33 deletions(-) diff --git a/tokio/src/util/linked_list.rs b/tokio/src/util/linked_list.rs index 0ed2b616456..ab20292e21d 100644 --- a/tokio/src/util/linked_list.rs +++ b/tokio/src/util/linked_list.rs @@ -78,26 +78,19 @@ pub(crate) struct Pointers { /// Additionally, we never access the `prev` or `next` fields directly, as any /// such access would implicitly involve the creation of a reference to the /// field, which we want to avoid since the fields are not `!Unpin`, and would -/// hence be given the `noalias` attribute if we were to do such an access. -/// As an alternative to accessing the fields directly, the `Pointers` type +/// hence be given the `noalias` attribute if we were to do such an access. As +/// an alternative to accessing the fields directly, the `Pointers` type /// provides getters and setters for the two fields, and those are implemented -/// using raw pointer casts and offsets, which is valid since the struct is -/// #[repr(C)]. +/// using `ptr`-specific methods which avoids the creation of intermediate +/// references. /// /// See this link for more information: /// -#[repr(C)] struct PointersInner { /// The previous node in the list. null if there is no previous node. - /// - /// This field is accessed through pointer manipulation, so it is not dead code. - #[allow(dead_code)] prev: Option>, /// The next node in the list. null if there is no previous node. - /// - /// This field is accessed through pointer manipulation, so it is not dead code. - #[allow(dead_code)] next: Option>, /// This type is !Unpin due to the heuristic from: @@ -418,38 +411,24 @@ impl Pointers { } pub(crate) fn get_prev(&self) -> Option> { - // SAFETY: prev is the first field in PointersInner, which is #[repr(C)]. - unsafe { - let inner = self.inner.get(); - let prev = inner as *const Option>; - ptr::read(prev) - } + // SAFETY: Field is accessed immutably through a reference. + unsafe { ptr::addr_of!((*self.inner.get()).prev).read() } } pub(crate) fn get_next(&self) -> Option> { - // SAFETY: next is the second field in PointersInner, which is #[repr(C)]. - unsafe { - let inner = self.inner.get(); - let prev = inner as *const Option>; - let next = prev.add(1); - ptr::read(next) - } + // SAFETY: Field is accessed immutably through a reference. + unsafe { ptr::addr_of!((*self.inner.get()).next).read() } } fn set_prev(&mut self, value: Option>) { - // SAFETY: prev is the first field in PointersInner, which is #[repr(C)]. + // SAFETY: Field is accessed mutably through a mutable reference. unsafe { - let inner = self.inner.get(); - let prev = inner as *mut Option>; - ptr::write(prev, value); + ptr::addr_of_mut!((*self.inner.get()).prev).write(value); } } fn set_next(&mut self, value: Option>) { - // SAFETY: next is the second field in PointersInner, which is #[repr(C)]. + // SAFETY: Field is accessed mutably through a mutable reference. unsafe { - let inner = self.inner.get(); - let prev = inner as *mut Option>; - let next = prev.add(1); - ptr::write(next, value); + ptr::addr_of_mut!((*self.inner.get()).next).write(value); } } } From d221c500faffab409ce84780ea1e40f76581332e Mon Sep 17 00:00:00 2001 From: Russell Cohen Date: Thu, 16 May 2024 06:14:07 -0400 Subject: [PATCH 011/119] docs: gate taskdump compiler_error behind not(doc) (#6564) --- tokio/src/lib.rs | 1 + 1 file changed, 1 insertion(+) diff --git a/tokio/src/lib.rs b/tokio/src/lib.rs index f15f8763e36..bacc8192742 100644 --- a/tokio/src/lib.rs +++ b/tokio/src/lib.rs @@ -471,6 +471,7 @@ compile_error!("The `tokio_taskdump` feature requires `--cfg tokio_unstable`."); #[cfg(all( tokio_taskdump, + not(doc), not(all( target_os = "linux", any(target_arch = "aarch64", target_arch = "x86", target_arch = "x86_64") From 35c6fd99243616db0a677c6686e37082c7c68a6f Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Fri, 17 May 2024 13:03:22 +0200 Subject: [PATCH 012/119] ci: set RUSTUP_WINDOWS_PATH_ADD_BIN=1 (#6568) --- .github/workflows/ci.yml | 1 + 1 file changed, 1 insertion(+) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 1d799a54083..76151902576 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -13,6 +13,7 @@ concurrency: env: RUSTFLAGS: -Dwarnings RUST_BACKTRACE: 1 + RUSTUP_WINDOWS_PATH_ADD_BIN: 1 # Change to specific Rust release to pin rust_stable: stable rust_nightly: nightly-2024-05-05 From daa89017dad7cecb769d3145c4368ae491a4ac67 Mon Sep 17 00:00:00 2001 From: Michael Scholten <32096160+41Leahcim@users.noreply.github.com> Date: Sat, 18 May 2024 10:09:37 +0200 Subject: [PATCH 013/119] ci: fix new clippy warnings (#6569) --- benches/time_timeout.rs | 4 ++-- tokio-stream/src/wrappers/interval.rs | 2 +- tokio-util/src/codec/any_delimiter_codec.rs | 2 +- tokio-util/src/codec/lines_codec.rs | 2 +- tokio-util/src/time/wheel/mod.rs | 1 - tokio/src/runtime/scheduler/multi_thread/stats.rs | 13 +++---------- tokio/src/runtime/task/state.rs | 1 - tokio/src/sync/batch_semaphore.rs | 2 +- tokio/src/sync/broadcast.rs | 1 - tokio/src/sync/rwlock.rs | 2 +- tokio/tests/sync_broadcast.rs | 2 -- 11 files changed, 10 insertions(+), 22 deletions(-) diff --git a/benches/time_timeout.rs b/benches/time_timeout.rs index c961477562c..9dedee9ddcd 100644 --- a/benches/time_timeout.rs +++ b/benches/time_timeout.rs @@ -40,7 +40,7 @@ fn do_timeout_test(c: &mut Criterion, workers: usize, name: &str) { b.iter_custom(|iters| { let start = Instant::now(); runtime.block_on(async { - black_box(spawn_timeout_job(iters as usize, workers).await); + black_box(spawn_timeout_job(iters as usize, workers)).await; }); start.elapsed() }) @@ -77,7 +77,7 @@ fn do_sleep_test(c: &mut Criterion, workers: usize, name: &str) { b.iter_custom(|iters| { let start = Instant::now(); runtime.block_on(async { - black_box(spawn_sleep_job(iters as usize, workers).await); + black_box(spawn_sleep_job(iters as usize, workers)).await; }); start.elapsed() }) diff --git a/tokio-stream/src/wrappers/interval.rs b/tokio-stream/src/wrappers/interval.rs index 2bf0194bd0f..c7a0b1f1e2a 100644 --- a/tokio-stream/src/wrappers/interval.rs +++ b/tokio-stream/src/wrappers/interval.rs @@ -33,7 +33,7 @@ impl Stream for IntervalStream { } fn size_hint(&self) -> (usize, Option) { - (std::usize::MAX, None) + (usize::MAX, None) } } diff --git a/tokio-util/src/codec/any_delimiter_codec.rs b/tokio-util/src/codec/any_delimiter_codec.rs index 3dbfd456b0a..fc5e57582db 100644 --- a/tokio-util/src/codec/any_delimiter_codec.rs +++ b/tokio-util/src/codec/any_delimiter_codec.rs @@ -2,7 +2,7 @@ use crate::codec::decoder::Decoder; use crate::codec::encoder::Encoder; use bytes::{Buf, BufMut, Bytes, BytesMut}; -use std::{cmp, fmt, io, str, usize}; +use std::{cmp, fmt, io, str}; const DEFAULT_SEEK_DELIMITERS: &[u8] = b",;\n\r"; const DEFAULT_SEQUENCE_WRITER: &[u8] = b","; diff --git a/tokio-util/src/codec/lines_codec.rs b/tokio-util/src/codec/lines_codec.rs index 5a6035d13b9..0da19238b63 100644 --- a/tokio-util/src/codec/lines_codec.rs +++ b/tokio-util/src/codec/lines_codec.rs @@ -2,7 +2,7 @@ use crate::codec::decoder::Decoder; use crate::codec::encoder::Encoder; use bytes::{Buf, BufMut, BytesMut}; -use std::{cmp, fmt, io, str, usize}; +use std::{cmp, fmt, io, str}; /// A simple [`Decoder`] and [`Encoder`] implementation that splits up data into lines. /// diff --git a/tokio-util/src/time/wheel/mod.rs b/tokio-util/src/time/wheel/mod.rs index 10a9900a666..d81611c92bd 100644 --- a/tokio-util/src/time/wheel/mod.rs +++ b/tokio-util/src/time/wheel/mod.rs @@ -7,7 +7,6 @@ pub(crate) use self::stack::Stack; use std::borrow::Borrow; use std::fmt::Debug; -use std::usize; /// Timing wheel implementation. /// diff --git a/tokio/src/runtime/scheduler/multi_thread/stats.rs b/tokio/src/runtime/scheduler/multi_thread/stats.rs index 03cfc790054..9d495706e8d 100644 --- a/tokio/src/runtime/scheduler/multi_thread/stats.rs +++ b/tokio/src/runtime/scheduler/multi_thread/stats.rs @@ -1,6 +1,5 @@ use crate::runtime::{Config, MetricsBatch, WorkerMetrics}; -use std::cmp; use std::time::{Duration, Instant}; /// Per-worker statistics. This is used for both tuning the scheduler and @@ -62,15 +61,9 @@ impl Stats { // As of Rust 1.45, casts from f64 -> u32 are saturating, which is fine here. let tasks_per_interval = (TARGET_GLOBAL_QUEUE_INTERVAL / self.task_poll_time_ewma) as u32; - cmp::max( - // If we are using self-tuning, we don't want to return less than 2 as that would result in the - // global queue always getting checked first. - 2, - cmp::min( - MAX_TASKS_POLLED_PER_GLOBAL_QUEUE_INTERVAL, - tasks_per_interval, - ), - ) + // If we are using self-tuning, we don't want to return less than 2 as that would result in the + // global queue always getting checked first. + tasks_per_interval.clamp(2, MAX_TASKS_POLLED_PER_GLOBAL_QUEUE_INTERVAL) } pub(crate) fn submit(&mut self, to: &WorkerMetrics) { diff --git a/tokio/src/runtime/task/state.rs b/tokio/src/runtime/task/state.rs index 42b239e05bb..0fc7bb0329b 100644 --- a/tokio/src/runtime/task/state.rs +++ b/tokio/src/runtime/task/state.rs @@ -2,7 +2,6 @@ use crate::loom::sync::atomic::AtomicUsize; use std::fmt; use std::sync::atomic::Ordering::{AcqRel, Acquire, Release}; -use std::usize; pub(super) struct State { val: AtomicUsize, diff --git a/tokio/src/sync/batch_semaphore.rs b/tokio/src/sync/batch_semaphore.rs index def5cbc9f51..a241f7922bf 100644 --- a/tokio/src/sync/batch_semaphore.rs +++ b/tokio/src/sync/batch_semaphore.rs @@ -127,7 +127,7 @@ impl Semaphore { /// implementation used three bits, so we will continue to reserve them to /// avoid a breaking change if additional flags need to be added in the /// future. - pub(crate) const MAX_PERMITS: usize = std::usize::MAX >> 3; + pub(crate) const MAX_PERMITS: usize = usize::MAX >> 3; const CLOSED: usize = 1; // The least-significant bit in the number of permits is reserved to use // as a flag indicating that the semaphore has been closed. Consequently diff --git a/tokio/src/sync/broadcast.rs b/tokio/src/sync/broadcast.rs index 326b81b4d5d..ba0a44fb8b9 100644 --- a/tokio/src/sync/broadcast.rs +++ b/tokio/src/sync/broadcast.rs @@ -129,7 +129,6 @@ use std::pin::Pin; use std::ptr::NonNull; use std::sync::atomic::Ordering::{Acquire, Relaxed, Release, SeqCst}; use std::task::{Context, Poll, Waker}; -use std::usize; /// Sending-half of the [`broadcast`] channel. /// diff --git a/tokio/src/sync/rwlock.rs b/tokio/src/sync/rwlock.rs index 37cf73c5905..14983d5cb32 100644 --- a/tokio/src/sync/rwlock.rs +++ b/tokio/src/sync/rwlock.rs @@ -21,7 +21,7 @@ pub(crate) use write_guard::RwLockWriteGuard; pub(crate) use write_guard_mapped::RwLockMappedWriteGuard; #[cfg(not(loom))] -const MAX_READS: u32 = std::u32::MAX >> 3; +const MAX_READS: u32 = u32::MAX >> 3; #[cfg(loom)] const MAX_READS: u32 = 10; diff --git a/tokio/tests/sync_broadcast.rs b/tokio/tests/sync_broadcast.rs index 17fe44f3e89..2638c1f33d4 100644 --- a/tokio/tests/sync_broadcast.rs +++ b/tokio/tests/sync_broadcast.rs @@ -286,8 +286,6 @@ fn zero_capacity() { #[should_panic] #[cfg(not(target_family = "wasm"))] // wasm currently doesn't support unwinding fn capacity_too_big() { - use std::usize; - broadcast::channel::<()>(1 + (usize::MAX >> 1)); } From a02407171a3f1aeb86e7406bcac9dfb415278308 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Sun, 19 May 2024 18:09:22 +0200 Subject: [PATCH 014/119] task: clarify that you can't abort `spawn_blocking` tasks (#6571) --- tokio/src/runtime/task/abort.rs | 14 ++++++++++++++ tokio/src/runtime/task/join.rs | 7 +++++++ tokio/src/task/blocking.rs | 14 ++++++-------- tokio/src/task/mod.rs | 6 ++++++ 4 files changed, 33 insertions(+), 8 deletions(-) diff --git a/tokio/src/runtime/task/abort.rs b/tokio/src/runtime/task/abort.rs index 410f0a4671b..2745b56020c 100644 --- a/tokio/src/runtime/task/abort.rs +++ b/tokio/src/runtime/task/abort.rs @@ -11,7 +11,14 @@ use std::panic::{RefUnwindSafe, UnwindSafe}; /// Dropping an `AbortHandle` releases the permission to terminate the task /// --- it does *not* abort the task. /// +/// Be aware that tasks spawned using [`spawn_blocking`] cannot be aborted +/// because they are not async. If you call `abort` on a `spawn_blocking` task, +/// then this *will not have any effect*, and the task will continue running +/// normally. The exception is if the task has not started running yet; in that +/// case, calling `abort` may prevent the task from starting. +/// /// [`JoinHandle`]: crate::task::JoinHandle +/// [`spawn_blocking`]: crate::task::spawn_blocking #[cfg_attr(docsrs, doc(cfg(feature = "rt")))] pub struct AbortHandle { raw: RawTask, @@ -31,11 +38,18 @@ impl AbortHandle { /// If the task was already cancelled, such as by [`JoinHandle::abort`], /// this method will do nothing. /// + /// Be aware that tasks spawned using [`spawn_blocking`] cannot be aborted + /// because they are not async. If you call `abort` on a `spawn_blocking` + /// task, then this *will not have any effect*, and the task will continue + /// running normally. The exception is if the task has not started running + /// yet; in that case, calling `abort` may prevent the task from starting. + /// /// See also [the module level docs] for more information on cancellation. /// /// [cancelled]: method@super::error::JoinError::is_cancelled /// [`JoinHandle::abort`]: method@super::JoinHandle::abort /// [the module level docs]: crate::task#cancellation + /// [`spawn_blocking`]: crate::task::spawn_blocking pub fn abort(&self) { self.raw.remote_abort(); } diff --git a/tokio/src/runtime/task/join.rs b/tokio/src/runtime/task/join.rs index 19289cf5826..e646f6575ed 100644 --- a/tokio/src/runtime/task/join.rs +++ b/tokio/src/runtime/task/join.rs @@ -179,6 +179,12 @@ impl JoinHandle { /// already completed at the time it was cancelled, but most likely it /// will fail with a [cancelled] `JoinError`. /// + /// Be aware that tasks spawned using [`spawn_blocking`] cannot be aborted + /// because they are not async. If you call `abort` on a `spawn_blocking` + /// task, then this *will not have any effect*, and the task will continue + /// running normally. The exception is if the task has not started running + /// yet; in that case, calling `abort` may prevent the task from starting. + /// /// See also [the module level docs] for more information on cancellation. /// /// ```rust @@ -210,6 +216,7 @@ impl JoinHandle { /// /// [cancelled]: method@super::error::JoinError::is_cancelled /// [the module level docs]: crate::task#cancellation + /// [`spawn_blocking`]: crate::task::spawn_blocking pub fn abort(&self) { self.raw.remote_abort(); } diff --git a/tokio/src/task/blocking.rs b/tokio/src/task/blocking.rs index 1cce466394e..193c28dfd0f 100644 --- a/tokio/src/task/blocking.rs +++ b/tokio/src/task/blocking.rs @@ -103,14 +103,11 @@ cfg_rt! { /// their own. If you want to spawn an ordinary thread, you should use /// [`thread::spawn`] instead. /// - /// Closures spawned using `spawn_blocking` cannot be cancelled abruptly; there - /// is no standard low level API to cause a thread to stop running. However, - /// a useful pattern is to pass some form of "cancellation token" into - /// the thread. This could be an [`AtomicBool`] that the task checks periodically. - /// Another approach is to have the thread primarily read or write from a channel, - /// and to exit when the channel closes; assuming the other side of the channel is dropped - /// when cancellation occurs, this will cause the blocking task thread to exit - /// soon after as well. + /// Be aware that tasks spawned using `spawn_blocking` cannot be aborted + /// because they are not async. If you call [`abort`] on a `spawn_blocking` + /// task, then this *will not have any effect*, and the task will continue + /// running normally. The exception is if the task has not started running + /// yet; in that case, calling `abort` may prevent the task from starting. /// /// When you shut down the executor, it will wait indefinitely for all blocking operations to /// finish. You can use [`shutdown_timeout`] to stop waiting for them after a @@ -152,6 +149,7 @@ cfg_rt! { /// [`shutdown_timeout`]: fn@crate::runtime::Runtime::shutdown_timeout /// [bridgesync]: https://tokio.rs/tokio/topics/bridging /// [`AtomicBool`]: struct@std::sync::atomic::AtomicBool + /// [`abort`]: crate::task::JoinHandle::abort /// /// # Examples /// diff --git a/tokio/src/task/mod.rs b/tokio/src/task/mod.rs index 32a87c93c55..0678aa3af7b 100644 --- a/tokio/src/task/mod.rs +++ b/tokio/src/task/mod.rs @@ -133,6 +133,12 @@ //! end of the task, then the [`JoinHandle`] will instead report that the task //! exited normally. //! +//! Be aware that tasks spawned using [`spawn_blocking`] cannot be aborted +//! because they are not async. If you call `abort` on a `spawn_blocking` +//! task, then this *will not have any effect*, and the task will continue +//! running normally. The exception is if the task has not started running +//! yet; in that case, calling `abort` may prevent the task from starting. +//! //! Be aware that calls to [`JoinHandle::abort`] just schedule the task for //! cancellation, and will return before the cancellation has completed. To wait //! for cancellation to complete, wait for the task to finish by awaiting the From 0b651c070f51ff30a2d610e1dff1a94cd3923749 Mon Sep 17 00:00:00 2001 From: "M.Amin Rayej" Date: Wed, 22 May 2024 14:54:48 +0330 Subject: [PATCH 015/119] fs: add `File::create_new` (#6573) --- tokio/src/fs/file.rs | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/tokio/src/fs/file.rs b/tokio/src/fs/file.rs index efce9fda990..27d91debbe8 100644 --- a/tokio/src/fs/file.rs +++ b/tokio/src/fs/file.rs @@ -193,6 +193,46 @@ impl File { Ok(File::from_std(std_file)) } + /// Opens a file in read-write mode. + /// + /// This function will create a file if it does not exist, or return an error + /// if it does. This way, if the call succeeds, the file returned is guaranteed + /// to be new. + /// + /// This option is useful because it is atomic. Otherwise between checking + /// whether a file exists and creating a new one, the file may have been + /// created by another process (a TOCTOU race condition / attack). + /// + /// This can also be written using `File::options().read(true).write(true).create_new(true).open(...)`. + /// + /// See [`OpenOptions`] for more details. + /// + /// # Examples + /// + /// ```no_run + /// use tokio::fs::File; + /// use tokio::io::AsyncWriteExt; + /// + /// # async fn dox() -> std::io::Result<()> { + /// let mut file = File::create_new("foo.txt").await?; + /// file.write_all(b"hello, world!").await?; + /// # Ok(()) + /// # } + /// ``` + /// + /// The [`write_all`] method is defined on the [`AsyncWriteExt`] trait. + /// + /// [`write_all`]: fn@crate::io::AsyncWriteExt::write_all + /// [`AsyncWriteExt`]: trait@crate::io::AsyncWriteExt + pub async fn create_new>(path: P) -> std::io::Result { + Self::options() + .read(true) + .write(true) + .create_new(true) + .open(path) + .await + } + /// Returns a new [`OpenOptions`] object. /// /// This function returns a new `OpenOptions` object that you can use to From e62c3e92692f795c407beadff580fa1380df5a26 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=BA=8C=E6=89=8B=E6=8E=89=E5=8C=85=E5=B7=A5=E7=A8=8B?= =?UTF-8?q?=E5=B8=88?= Date: Wed, 22 May 2024 20:35:12 +0900 Subject: [PATCH 016/119] task: add `tokio::task::join_set::Builder::spawn_blocking` (#6578) Signed-off-by: hi-rustin --- tokio/src/task/join_set.rs | 47 +++++++++++++++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/tokio/src/task/join_set.rs b/tokio/src/task/join_set.rs index c9251db86d7..267ceb55bcc 100644 --- a/tokio/src/task/join_set.rs +++ b/tokio/src/task/join_set.rs @@ -308,7 +308,7 @@ impl JoinSet { /// Tries to join one of the tasks in the set that has completed and return its output. /// - /// Returns `None` if the set is empty. + /// Returns `None` if the set is empty. pub fn try_join_next(&mut self) -> Option> { // Loop over all notified `JoinHandle`s to find one that's ready, or until none are left. loop { @@ -623,6 +623,51 @@ impl<'a, T: 'static> Builder<'a, T> { Ok(self.joinset.insert(self.builder.spawn_on(future, handle)?)) } + /// Spawn the blocking code on the blocking threadpool with this builder's + /// settings, and store it in the [`JoinSet`]. + /// + /// # Returns + /// + /// An [`AbortHandle`] that can be used to remotely cancel the task. + /// + /// # Panics + /// + /// This method panics if called outside of a Tokio runtime. + /// + /// [`JoinSet`]: crate::task::JoinSet + /// [`AbortHandle`]: crate::task::AbortHandle + #[track_caller] + pub fn spawn_blocking(self, f: F) -> std::io::Result + where + F: FnOnce() -> T, + F: Send + 'static, + T: Send, + { + Ok(self.joinset.insert(self.builder.spawn_blocking(f)?)) + } + + /// Spawn the blocking code on the blocking threadpool of the provided + /// runtime handle with this builder's settings, and store it in the + /// [`JoinSet`]. + /// + /// # Returns + /// + /// An [`AbortHandle`] that can be used to remotely cancel the task. + /// + /// [`JoinSet`]: crate::task::JoinSet + /// [`AbortHandle`]: crate::task::AbortHandle + #[track_caller] + pub fn spawn_blocking_on(self, f: F, handle: &Handle) -> std::io::Result + where + F: FnOnce() -> T, + F: Send + 'static, + T: Send, + { + Ok(self + .joinset + .insert(self.builder.spawn_blocking_on(f, handle)?)) + } + /// Spawn the provided task on the current [`LocalSet`] with this builder's /// settings, and store it in the [`JoinSet`]. /// From 1914e1e4b9bfe6ea2d61970ec3fcf2b5d7bb0210 Mon Sep 17 00:00:00 2001 From: Weijia Jiang Date: Wed, 22 May 2024 19:54:26 +0800 Subject: [PATCH 017/119] time: use sharding for timer implementation (#6534) --- tokio/src/runtime/builder.rs | 9 +- tokio/src/runtime/context.rs | 12 +- tokio/src/runtime/driver.rs | 8 +- .../runtime/scheduler/multi_thread/worker.rs | 5 + .../scheduler/multi_thread_alt/worker.rs | 5 + tokio/src/runtime/time/entry.rs | 37 +++- tokio/src/runtime/time/mod.rs | 159 ++++++++++++------ tokio/src/runtime/time/tests/mod.rs | 16 +- tokio/src/util/mod.rs | 2 +- tokio/src/util/rand.rs | 1 + 10 files changed, 184 insertions(+), 70 deletions(-) diff --git a/tokio/src/runtime/builder.rs b/tokio/src/runtime/builder.rs index 3b09c0d4b10..05f736d3e50 100644 --- a/tokio/src/runtime/builder.rs +++ b/tokio/src/runtime/builder.rs @@ -702,7 +702,7 @@ impl Builder { } } - fn get_cfg(&self) -> driver::Cfg { + fn get_cfg(&self, workers: usize) -> driver::Cfg { driver::Cfg { enable_pause_time: match self.kind { Kind::CurrentThread => true, @@ -715,6 +715,7 @@ impl Builder { enable_time: self.enable_time, start_paused: self.start_paused, nevents: self.nevents, + workers, } } @@ -1095,7 +1096,7 @@ impl Builder { use crate::runtime::scheduler::{self, CurrentThread}; use crate::runtime::{runtime::Scheduler, Config}; - let (driver, driver_handle) = driver::Driver::new(self.get_cfg())?; + let (driver, driver_handle) = driver::Driver::new(self.get_cfg(1))?; // Blocking pool let blocking_pool = blocking::create_blocking_pool(self, self.max_blocking_threads); @@ -1248,7 +1249,7 @@ cfg_rt_multi_thread! { let core_threads = self.worker_threads.unwrap_or_else(num_cpus); - let (driver, driver_handle) = driver::Driver::new(self.get_cfg())?; + let (driver, driver_handle) = driver::Driver::new(self.get_cfg(core_threads))?; // Create the blocking pool let blocking_pool = @@ -1295,7 +1296,7 @@ cfg_rt_multi_thread! { use crate::runtime::scheduler::MultiThreadAlt; let core_threads = self.worker_threads.unwrap_or_else(num_cpus); - let (driver, driver_handle) = driver::Driver::new(self.get_cfg())?; + let (driver, driver_handle) = driver::Driver::new(self.get_cfg(core_threads))?; // Create the blocking pool let blocking_pool = diff --git a/tokio/src/runtime/context.rs b/tokio/src/runtime/context.rs index 62e4fc9474c..76918114bc3 100644 --- a/tokio/src/runtime/context.rs +++ b/tokio/src/runtime/context.rs @@ -3,7 +3,7 @@ use crate::runtime::coop; use std::cell::Cell; -#[cfg(any(feature = "rt", feature = "macros"))] +#[cfg(any(feature = "rt", feature = "macros", feature = "time"))] use crate::util::rand::FastRand; cfg_rt! { @@ -57,7 +57,7 @@ struct Context { #[cfg(feature = "rt")] runtime: Cell, - #[cfg(any(feature = "rt", feature = "macros"))] + #[cfg(any(feature = "rt", feature = "macros", feature = "time"))] rng: Cell>, /// Tracks the amount of "work" a task may still do before yielding back to @@ -100,7 +100,7 @@ tokio_thread_local! { #[cfg(feature = "rt")] runtime: Cell::new(EnterRuntime::NotEntered), - #[cfg(any(feature = "rt", feature = "macros"))] + #[cfg(any(feature = "rt", feature = "macros", feature = "time"))] rng: Cell::new(None), budget: Cell::new(coop::Budget::unconstrained()), @@ -121,7 +121,11 @@ tokio_thread_local! { } } -#[cfg(any(feature = "macros", all(feature = "sync", feature = "rt")))] +#[cfg(any( + feature = "time", + feature = "macros", + all(feature = "sync", feature = "rt") +))] pub(crate) fn thread_rng_n(n: u32) -> u32 { CONTEXT.with(|ctx| { let mut rng = ctx.rng.get().unwrap_or_else(FastRand::new); diff --git a/tokio/src/runtime/driver.rs b/tokio/src/runtime/driver.rs index 64928228b46..11aa7abb7b7 100644 --- a/tokio/src/runtime/driver.rs +++ b/tokio/src/runtime/driver.rs @@ -40,6 +40,7 @@ pub(crate) struct Cfg { pub(crate) enable_pause_time: bool, pub(crate) start_paused: bool, pub(crate) nevents: usize, + pub(crate) workers: usize, } impl Driver { @@ -48,7 +49,8 @@ impl Driver { let clock = create_clock(cfg.enable_pause_time, cfg.start_paused); - let (time_driver, time_handle) = create_time_driver(cfg.enable_time, io_stack, &clock); + let (time_driver, time_handle) = + create_time_driver(cfg.enable_time, io_stack, &clock, cfg.workers); Ok(( Self { inner: time_driver }, @@ -306,9 +308,10 @@ cfg_time! { enable: bool, io_stack: IoStack, clock: &Clock, + workers: usize, ) -> (TimeDriver, TimeHandle) { if enable { - let (driver, handle) = crate::runtime::time::Driver::new(io_stack, clock); + let (driver, handle) = crate::runtime::time::Driver::new(io_stack, clock, workers as u32); (TimeDriver::Enabled { driver }, Some(handle)) } else { @@ -361,6 +364,7 @@ cfg_not_time! { _enable: bool, io_stack: IoStack, _clock: &Clock, + _workers: usize, ) -> (TimeDriver, TimeHandle) { (io_stack, ()) } diff --git a/tokio/src/runtime/scheduler/multi_thread/worker.rs b/tokio/src/runtime/scheduler/multi_thread/worker.rs index 83e70795f4f..9f0dd98dfdc 100644 --- a/tokio/src/runtime/scheduler/multi_thread/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread/worker.rs @@ -742,6 +742,11 @@ impl Context { pub(crate) fn defer(&self, waker: &Waker) { self.defer.defer(waker); } + + #[allow(dead_code)] + pub(crate) fn get_worker_index(&self) -> usize { + self.worker.index + } } impl Core { diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs index c315e382291..63ae0a49743 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs @@ -1311,6 +1311,11 @@ impl Context { fn shared(&self) -> &Shared { &self.handle.shared } + + #[cfg_attr(not(feature = "time"), allow(dead_code))] + pub(crate) fn get_worker_index(&self) -> usize { + self.index + } } impl Core { diff --git a/tokio/src/runtime/time/entry.rs b/tokio/src/runtime/time/entry.rs index 7991ee0dc0a..834077caa3d 100644 --- a/tokio/src/runtime/time/entry.rs +++ b/tokio/src/runtime/time/entry.rs @@ -58,6 +58,7 @@ use crate::loom::cell::UnsafeCell; use crate::loom::sync::atomic::AtomicU64; use crate::loom::sync::atomic::Ordering; +use crate::runtime::context; use crate::runtime::scheduler; use crate::sync::AtomicWaker; use crate::time::Instant; @@ -328,6 +329,8 @@ pub(super) type EntryList = crate::util::linked_list::LinkedList Self { + pub(super) fn new(shard_id: u32) -> Self { Self { + shard_id, cached_when: AtomicU64::new(0), pointers: linked_list::Pointers::new(), state: StateCell::default(), @@ -438,6 +442,11 @@ impl TimerShared { pub(super) fn might_be_registered(&self) -> bool { self.state.might_be_registered() } + + /// Gets the shard id. + pub(super) fn shard_id(&self) -> u32 { + self.shard_id + } } unsafe impl linked_list::Link for TimerShared { @@ -485,8 +494,10 @@ impl TimerEntry { fn inner(&self) -> &TimerShared { let inner = unsafe { &*self.inner.get() }; if inner.is_none() { + let shard_size = self.driver.driver().time().inner.get_shard_size(); + let shard_id = generate_shard_id(shard_size); unsafe { - *self.inner.get() = Some(TimerShared::new()); + *self.inner.get() = Some(TimerShared::new(shard_id)); } } return inner.as_ref().unwrap(); @@ -643,3 +654,25 @@ impl Drop for TimerEntry { unsafe { Pin::new_unchecked(self) }.as_mut().cancel(); } } + +// Generates a shard id. If current thread is a worker thread, we use its worker index as a shard id. +// Otherwise, we use a random number generator to obtain the shard id. +cfg_rt! { + fn generate_shard_id(shard_size: u32) -> u32 { + let id = context::with_scheduler(|ctx| match ctx { + Some(scheduler::Context::CurrentThread(_ctx)) => 0, + #[cfg(feature = "rt-multi-thread")] + Some(scheduler::Context::MultiThread(ctx)) => ctx.get_worker_index() as u32, + #[cfg(all(tokio_unstable, feature = "rt-multi-thread"))] + Some(scheduler::Context::MultiThreadAlt(ctx)) => ctx.get_worker_index() as u32, + None => context::thread_rng_n(shard_size), + }); + id % shard_size + } +} + +cfg_not_rt! { + fn generate_shard_id(shard_size: u32) -> u32 { + context::thread_rng_n(shard_size) + } +} diff --git a/tokio/src/runtime/time/mod.rs b/tokio/src/runtime/time/mod.rs index 8cd51c5cb4a..37b04ef0000 100644 --- a/tokio/src/runtime/time/mod.rs +++ b/tokio/src/runtime/time/mod.rs @@ -12,6 +12,7 @@ use entry::{EntryList, TimerHandle, TimerShared, MAX_SAFE_MILLIS_DURATION}; mod handle; pub(crate) use self::handle::Handle; +use self::wheel::Wheel; mod source; pub(crate) use source::TimeSource; @@ -25,9 +26,28 @@ use crate::time::error::Error; use crate::time::{Clock, Duration}; use crate::util::WakeList; +use crate::loom::sync::atomic::AtomicU64; use std::fmt; use std::{num::NonZeroU64, ptr::NonNull}; +struct AtomicOptionNonZeroU64(AtomicU64); + +// A helper type to store the `next_wake`. +impl AtomicOptionNonZeroU64 { + fn new(val: Option) -> Self { + Self(AtomicU64::new(val.map_or(0, NonZeroU64::get))) + } + + fn store(&self, val: Option) { + self.0 + .store(val.map_or(0, NonZeroU64::get), Ordering::Relaxed); + } + + fn load(&self) -> Option { + NonZeroU64::new(self.0.load(Ordering::Relaxed)) + } +} + /// Time implementation that drives [`Sleep`][sleep], [`Interval`][interval], and [`Timeout`][timeout]. /// /// A `Driver` instance tracks the state necessary for managing time and @@ -91,8 +111,11 @@ pub(crate) struct Driver { /// Timer state shared between `Driver`, `Handle`, and `Registration`. struct Inner { - // The state is split like this so `Handle` can access `is_shutdown` without locking the mutex - pub(super) state: Mutex, + /// The earliest time at which we promise to wake up without unparking. + next_wake: AtomicOptionNonZeroU64, + + /// Sharded Timer wheels. + wheels: Box<[Mutex]>, /// True if the driver is being shutdown. pub(super) is_shutdown: AtomicBool, @@ -107,15 +130,6 @@ struct Inner { did_wake: AtomicBool, } -/// Time state shared which must be protected by a `Mutex` -struct InnerState { - /// The earliest time at which we promise to wake up without unparking. - next_wake: Option, - - /// Timer wheel. - wheel: wheel::Wheel, -} - // ===== impl Driver ===== impl Driver { @@ -123,18 +137,20 @@ impl Driver { /// thread and `time_source` to get the current time and convert to ticks. /// /// Specifying the source of time is useful when testing. - pub(crate) fn new(park: IoStack, clock: &Clock) -> (Driver, Handle) { + pub(crate) fn new(park: IoStack, clock: &Clock, shards: u32) -> (Driver, Handle) { + assert!(shards > 0); + let time_source = TimeSource::new(clock); + let wheels: Vec<_> = (0..shards) + .map(|_| Mutex::new(wheel::Wheel::new())) + .collect(); let handle = Handle { time_source, inner: Inner { - state: Mutex::new(InnerState { - next_wake: None, - wheel: wheel::Wheel::new(), - }), + next_wake: AtomicOptionNonZeroU64::new(None), + wheels: wheels.into_boxed_slice(), is_shutdown: AtomicBool::new(false), - #[cfg(feature = "test-util")] did_wake: AtomicBool::new(false), }, @@ -164,24 +180,30 @@ impl Driver { // Advance time forward to the end of time. - handle.process_at_time(u64::MAX); + handle.process_at_time(0, u64::MAX); self.park.shutdown(rt_handle); } fn park_internal(&mut self, rt_handle: &driver::Handle, limit: Option) { let handle = rt_handle.time(); - let mut lock = handle.inner.state.lock(); - assert!(!handle.is_shutdown()); - let next_wake = lock.wheel.next_expiration_time(); - lock.next_wake = - next_wake.map(|t| NonZeroU64::new(t).unwrap_or_else(|| NonZeroU64::new(1).unwrap())); - - drop(lock); - - match next_wake { + // Finds out the min expiration time to park. + let expiration_time = (0..rt_handle.time().inner.get_shard_size()) + .filter_map(|id| { + let lock = rt_handle.time().inner.lock_sharded_wheel(id); + lock.next_expiration_time() + }) + .min(); + + rt_handle + .time() + .inner + .next_wake + .store(next_wake_time(expiration_time)); + + match expiration_time { Some(when) => { let now = handle.time_source.now(rt_handle.clock()); // Note that we effectively round up to 1ms here - this avoids @@ -245,30 +267,59 @@ impl Driver { } } +// Helper function to turn expiration_time into next_wake_time. +// Since the `park_timeout` will round up to 1ms for avoiding very +// short-duration microsecond-resolution sleeps, we do the same here. +// The conversion is as follows +// None => None +// Some(0) => Some(1) +// Some(i) => Some(i) +fn next_wake_time(expiration_time: Option) -> Option { + expiration_time.and_then(|v| { + if v == 0 { + NonZeroU64::new(1) + } else { + NonZeroU64::new(v) + } + }) +} + impl Handle { /// Runs timer related logic, and returns the next wakeup time pub(self) fn process(&self, clock: &Clock) { let now = self.time_source().now(clock); + // For fairness, randomly select one to start. + let shards = self.inner.get_shard_size(); + let start = crate::runtime::context::thread_rng_n(shards); + self.process_at_time(start, now); + } - self.process_at_time(now); + pub(self) fn process_at_time(&self, start: u32, now: u64) { + let shards = self.inner.get_shard_size(); + + let expiration_time = (start..shards + start) + .filter_map(|i| self.process_at_sharded_time(i, now)) + .min(); + + self.inner.next_wake.store(next_wake_time(expiration_time)); } - pub(self) fn process_at_time(&self, mut now: u64) { + // Returns the next wakeup time of this shard. + pub(self) fn process_at_sharded_time(&self, id: u32, mut now: u64) -> Option { let mut waker_list = WakeList::new(); + let mut lock = self.inner.lock_sharded_wheel(id); - let mut lock = self.inner.lock(); - - if now < lock.wheel.elapsed() { + if now < lock.elapsed() { // Time went backwards! This normally shouldn't happen as the Rust language // guarantees that an Instant is monotonic, but can happen when running // Linux in a VM on a Windows host due to std incorrectly trusting the // hardware clock to be monotonic. // // See for more information. - now = lock.wheel.elapsed(); + now = lock.elapsed(); } - while let Some(entry) = lock.wheel.poll(now) { + while let Some(entry) = lock.poll(now) { debug_assert!(unsafe { entry.is_pending() }); // SAFETY: We hold the driver lock, and just removed the entry from any linked lists. @@ -281,19 +332,15 @@ impl Handle { waker_list.wake_all(); - lock = self.inner.lock(); + lock = self.inner.lock_sharded_wheel(id); } } } - - lock.next_wake = lock - .wheel - .poll_at() - .map(|t| NonZeroU64::new(t).unwrap_or_else(|| NonZeroU64::new(1).unwrap())); - + let next_wake_up = lock.poll_at(); drop(lock); waker_list.wake_all(); + next_wake_up } /// Removes a registered timer from the driver. @@ -308,10 +355,10 @@ impl Handle { /// `add_entry` must not be called concurrently. pub(self) unsafe fn clear_entry(&self, entry: NonNull) { unsafe { - let mut lock = self.inner.lock(); + let mut lock = self.inner.lock_sharded_wheel(entry.as_ref().shard_id()); if entry.as_ref().might_be_registered() { - lock.wheel.remove(entry); + lock.remove(entry); } entry.as_ref().handle().fire(Ok(())); @@ -331,12 +378,12 @@ impl Handle { entry: NonNull, ) { let waker = unsafe { - let mut lock = self.inner.lock(); + let mut lock = self.inner.lock_sharded_wheel(entry.as_ref().shard_id()); // We may have raced with a firing/deregistration, so check before // deregistering. if unsafe { entry.as_ref().might_be_registered() } { - lock.wheel.remove(entry); + lock.remove(entry); } // Now that we have exclusive control of this entry, mint a handle to reinsert it. @@ -350,10 +397,12 @@ impl Handle { // Note: We don't have to worry about racing with some other resetting // thread, because add_entry and reregister require exclusive control of // the timer entry. - match unsafe { lock.wheel.insert(entry) } { + match unsafe { lock.insert(entry) } { Ok(when) => { - if lock + if self + .inner .next_wake + .load() .map(|next_wake| when < next_wake.get()) .unwrap_or(true) { @@ -389,15 +438,25 @@ impl Handle { // ===== impl Inner ===== impl Inner { - /// Locks the driver's inner structure - pub(super) fn lock(&self) -> crate::loom::sync::MutexGuard<'_, InnerState> { - self.state.lock() + /// Locks the driver's sharded wheel structure. + pub(super) fn lock_sharded_wheel( + &self, + shard_id: u32, + ) -> crate::loom::sync::MutexGuard<'_, Wheel> { + let index = shard_id % (self.wheels.len() as u32); + // Safety: This modulo operation ensures that the index is not out of bounds. + unsafe { self.wheels.get_unchecked(index as usize).lock() } } // Check whether the driver has been shutdown pub(super) fn is_shutdown(&self) -> bool { self.is_shutdown.load(Ordering::SeqCst) } + + // Gets the number of shards. + fn get_shard_size(&self) -> u32 { + self.wheels.len() as u32 + } } impl fmt::Debug for Inner { diff --git a/tokio/src/runtime/time/tests/mod.rs b/tokio/src/runtime/time/tests/mod.rs index 520dc00a462..676cf55f9c6 100644 --- a/tokio/src/runtime/time/tests/mod.rs +++ b/tokio/src/runtime/time/tests/mod.rs @@ -68,7 +68,7 @@ fn single_timer() { // This may or may not return Some (depending on how it races with the // thread). If it does return None, however, the timer should complete // synchronously. - time.process_at_time(time.time_source().now(clock) + 2_000_000_000); + time.process_at_time(0, time.time_source().now(clock) + 2_000_000_000); jh.join().unwrap(); }) @@ -102,7 +102,7 @@ fn drop_timer() { let clock = handle.inner.driver().clock(); // advance 2s in the future. - time.process_at_time(time.time_source().now(clock) + 2_000_000_000); + time.process_at_time(0, time.time_source().now(clock) + 2_000_000_000); jh.join().unwrap(); }) @@ -138,7 +138,7 @@ fn change_waker() { let clock = handle.inner.driver().clock(); // advance 2s - time.process_at_time(time.time_source().now(clock) + 2_000_000_000); + time.process_at_time(0, time.time_source().now(clock) + 2_000_000_000); jh.join().unwrap(); }) @@ -181,6 +181,7 @@ fn reset_future() { // This may or may not return a wakeup time. handle.process_at_time( + 0, handle .time_source() .instant_to_tick(start + Duration::from_millis(1500)), @@ -189,6 +190,7 @@ fn reset_future() { assert!(!finished_early.load(Ordering::Relaxed)); handle.process_at_time( + 0, handle .time_source() .instant_to_tick(start + Duration::from_millis(2500)), @@ -231,7 +233,7 @@ fn poll_process_levels() { } for t in 1..normal_or_miri(1024, 64) { - handle.inner.driver().time().process_at_time(t as u64); + handle.inner.driver().time().process_at_time(0, t as u64); for (deadline, future) in entries.iter_mut().enumerate() { let mut context = Context::from_waker(noop_waker_ref()); @@ -260,8 +262,8 @@ fn poll_process_levels_targeted() { let handle = handle.inner.driver().time(); - handle.process_at_time(62); + handle.process_at_time(0, 62); assert!(e1.as_mut().poll_elapsed(&mut context).is_pending()); - handle.process_at_time(192); - handle.process_at_time(192); + handle.process_at_time(0, 192); + handle.process_at_time(0, 192); } diff --git a/tokio/src/util/mod.rs b/tokio/src/util/mod.rs index d821ec897cf..7cf371195ff 100644 --- a/tokio/src/util/mod.rs +++ b/tokio/src/util/mod.rs @@ -49,7 +49,7 @@ cfg_rt! { pub(crate) mod sharded_list; } -#[cfg(any(feature = "rt", feature = "macros"))] +#[cfg(any(feature = "rt", feature = "macros", feature = "time"))] pub(crate) mod rand; cfg_rt! { diff --git a/tokio/src/util/rand.rs b/tokio/src/util/rand.rs index 67c45693c9c..aad85b973ff 100644 --- a/tokio/src/util/rand.rs +++ b/tokio/src/util/rand.rs @@ -71,6 +71,7 @@ impl FastRand { #[cfg(any( feature = "macros", feature = "rt-multi-thread", + feature = "time", all(feature = "sync", feature = "rt") ))] pub(crate) fn fastrand_n(&mut self, n: u32) -> u32 { From 16ef7b1fd5b370208c5b9604e3fb0a964f24e92f Mon Sep 17 00:00:00 2001 From: Roy Wellington <53838718+roy-work@users.noreply.github.com> Date: Thu, 23 May 2024 00:52:57 -0400 Subject: [PATCH 018/119] docs: fix `stdin` documentation (#6581) The code for `output` indicates that only sets `stdout` and `stderr`, yet the docs for `stdin` indicated that it too would be set. This seems like it was just a simple copy/paste typo, so correct `stdin` to note that it just defaults to `inherit`. Fixes #6577. --- tokio/src/process/mod.rs | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/tokio/src/process/mod.rs b/tokio/src/process/mod.rs index fc661d89c1f..585dbdd6af6 100644 --- a/tokio/src/process/mod.rs +++ b/tokio/src/process/mod.rs @@ -544,11 +544,9 @@ impl Command { /// Sets configuration for the child process's standard input (stdin) handle. /// - /// Defaults to [`inherit`] when used with `spawn` or `status`, and - /// defaults to [`piped`] when used with `output`. + /// Defaults to [`inherit`]. /// /// [`inherit`]: std::process::Stdio::inherit - /// [`piped`]: std::process::Stdio::piped /// /// # Examples /// From cba86cf1b1edea8cd131f168a99953e6e35739d2 Mon Sep 17 00:00:00 2001 From: Russell Cohen Date: Thu, 23 May 2024 12:41:01 -0400 Subject: [PATCH 019/119] metrics: add MetricAtomicU64 and use in metrics (#6574) --- spellcheck.dic | 3 +- tokio/src/macros/cfg.rs | 28 +- tokio/src/runtime/metrics/histogram.rs | 15 +- tokio/src/runtime/metrics/io.rs | 14 +- tokio/src/runtime/metrics/runtime.rs | 1158 ++++++++++++------------ tokio/src/runtime/metrics/scheduler.rs | 15 +- tokio/src/runtime/metrics/worker.rs | 39 +- tokio/src/runtime/tests/queue.rs | 21 +- tokio/src/util/metric_atomics.rs | 47 + tokio/src/util/mod.rs | 2 + tokio/tests/rt_basic.rs | 2 +- tokio/tests/rt_metrics.rs | 7 +- tokio/tests/rt_threaded.rs | 2 +- tokio/tests/rt_threaded_alt.rs | 2 +- 14 files changed, 722 insertions(+), 633 deletions(-) create mode 100644 tokio/src/util/metric_atomics.rs diff --git a/spellcheck.dic b/spellcheck.dic index 4b9288118d2..238e24f7dc3 100644 --- a/spellcheck.dic +++ b/spellcheck.dic @@ -1,4 +1,4 @@ -284 +285 & + < @@ -34,6 +34,7 @@ amongst api APIs async +atomics awaitable backend backpressure diff --git a/tokio/src/macros/cfg.rs b/tokio/src/macros/cfg.rs index c67e0e8379f..f44599ff47a 100644 --- a/tokio/src/macros/cfg.rs +++ b/tokio/src/macros/cfg.rs @@ -218,19 +218,37 @@ macro_rules! cfg_macros { macro_rules! cfg_metrics { ($($item:item)*) => { $( - // For now, metrics is only disabled in loom tests. - // When stabilized, it might have a dedicated feature flag. - #[cfg(all(tokio_unstable, not(loom)))] + #[cfg(tokio_unstable)] #[cfg_attr(docsrs, doc(cfg(tokio_unstable)))] $item )* } } +/// Some metrics require 64-bit atomics. +macro_rules! cfg_64bit_metrics { + ($($item:item)*) => { + $( + #[cfg(target_has_atomic = "64")] + #[cfg_attr(docsrs, doc(cfg(target_has_atomic = "64")))] + $item + )* + } +} + +macro_rules! cfg_no_64bit_metrics { + ($($item:item)*) => { + $( + #[cfg(not(target_has_atomic = "64"))] + $item + )* + } +} + macro_rules! cfg_not_metrics { ($($item:item)*) => { $( - #[cfg(not(all(tokio_unstable, not(loom))))] + #[cfg(not(tokio_unstable))] $item )* } @@ -238,7 +256,7 @@ macro_rules! cfg_not_metrics { macro_rules! cfg_not_rt_and_metrics_and_net { ($($item:item)*) => { - $( #[cfg(not(all(feature = "net", feature = "rt", all(tokio_unstable, not(loom)))))]$item )* + $( #[cfg(not(all(feature = "net", feature = "rt", tokio_unstable)))]$item )* } } diff --git a/tokio/src/runtime/metrics/histogram.rs b/tokio/src/runtime/metrics/histogram.rs index 976f54fe852..f75ffa3b495 100644 --- a/tokio/src/runtime/metrics/histogram.rs +++ b/tokio/src/runtime/metrics/histogram.rs @@ -1,4 +1,5 @@ -use crate::loom::sync::atomic::{AtomicU64, Ordering::Relaxed}; +use crate::loom::sync::atomic::Ordering::Relaxed; +use crate::util::metric_atomics::MetricAtomicU64; use std::cmp; use std::ops::Range; @@ -6,7 +7,7 @@ use std::ops::Range; #[derive(Debug)] pub(crate) struct Histogram { /// The histogram buckets - buckets: Box<[AtomicU64]>, + buckets: Box<[MetricAtomicU64]>, /// Bucket scale, linear or log scale: HistogramScale, @@ -53,8 +54,10 @@ impl Histogram { self.buckets.len() } - pub(crate) fn get(&self, bucket: usize) -> u64 { - self.buckets[bucket].load(Relaxed) + cfg_64bit_metrics! { + pub(crate) fn get(&self, bucket: usize) -> u64 { + self.buckets[bucket].load(Relaxed) + } } pub(crate) fn bucket_range(&self, bucket: usize) -> Range { @@ -150,7 +153,7 @@ impl HistogramBuilder { Histogram { buckets: (0..self.num_buckets) - .map(|_| AtomicU64::new(0)) + .map(|_| MetricAtomicU64::new(0)) .collect::>() .into_boxed_slice(), resolution, @@ -165,7 +168,7 @@ impl Default for HistogramBuilder { } } -#[cfg(test)] +#[cfg(all(test, target_has_atomic = "64"))] mod test { use super::*; diff --git a/tokio/src/runtime/metrics/io.rs b/tokio/src/runtime/metrics/io.rs index 06efdd42d72..674fca5faec 100644 --- a/tokio/src/runtime/metrics/io.rs +++ b/tokio/src/runtime/metrics/io.rs @@ -1,24 +1,24 @@ #![cfg_attr(not(feature = "net"), allow(dead_code))] -use crate::loom::sync::atomic::{AtomicU64, Ordering::Relaxed}; +use crate::{loom::sync::atomic::Ordering::Relaxed, util::metric_atomics::MetricAtomicU64}; #[derive(Default)] pub(crate) struct IoDriverMetrics { - pub(super) fd_registered_count: AtomicU64, - pub(super) fd_deregistered_count: AtomicU64, - pub(super) ready_count: AtomicU64, + pub(super) fd_registered_count: MetricAtomicU64, + pub(super) fd_deregistered_count: MetricAtomicU64, + pub(super) ready_count: MetricAtomicU64, } impl IoDriverMetrics { pub(crate) fn incr_fd_count(&self) { - self.fd_registered_count.fetch_add(1, Relaxed); + self.fd_registered_count.add(1, Relaxed); } pub(crate) fn dec_fd_count(&self) { - self.fd_deregistered_count.fetch_add(1, Relaxed); + self.fd_deregistered_count.add(1, Relaxed); } pub(crate) fn incr_ready_count_by(&self, amt: u64) { - self.ready_count.fetch_add(amt, Relaxed); + self.ready_count.add(amt, Relaxed); } } diff --git a/tokio/src/runtime/metrics/runtime.rs b/tokio/src/runtime/metrics/runtime.rs index 66a3e51bb97..865a6406a6a 100644 --- a/tokio/src/runtime/metrics/runtime.rs +++ b/tokio/src/runtime/metrics/runtime.rs @@ -1,7 +1,9 @@ use crate::runtime::Handle; use std::ops::Range; -use std::sync::atomic::Ordering::Relaxed; +cfg_64bit_metrics! { + use std::sync::atomic::Ordering::Relaxed; +} use std::time::Duration; /// Handle to the runtime's metrics. @@ -112,407 +114,409 @@ impl RuntimeMetrics { self.handle.inner.num_idle_blocking_threads() } - /// Returns the number of tasks scheduled from **outside** of the runtime. - /// - /// The remote schedule count starts at zero when the runtime is created and - /// increases by one each time a task is woken from **outside** of the - /// runtime. This usually means that a task is spawned or notified from a - /// non-runtime thread and must be queued using the Runtime's injection - /// queue, which tends to be slower. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.remote_schedule_count(); - /// println!("{} tasks were scheduled from outside the runtime", n); - /// } - /// ``` - pub fn remote_schedule_count(&self) -> u64 { - self.handle - .inner - .scheduler_metrics() - .remote_schedule_count - .load(Relaxed) - } + cfg_64bit_metrics! { + /// Returns the number of tasks scheduled from **outside** of the runtime. + /// + /// The remote schedule count starts at zero when the runtime is created and + /// increases by one each time a task is woken from **outside** of the + /// runtime. This usually means that a task is spawned or notified from a + /// non-runtime thread and must be queued using the Runtime's injection + /// queue, which tends to be slower. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.remote_schedule_count(); + /// println!("{} tasks were scheduled from outside the runtime", n); + /// } + /// ``` + pub fn remote_schedule_count(&self) -> u64 { + self.handle + .inner + .scheduler_metrics() + .remote_schedule_count + .load(Relaxed) + } - /// Returns the number of times that tasks have been forced to yield back to the scheduler - /// after exhausting their task budgets. - /// - /// This count starts at zero when the runtime is created and increases by one each time a task yields due to exhausting its budget. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - pub fn budget_forced_yield_count(&self) -> u64 { - self.handle - .inner - .scheduler_metrics() - .budget_forced_yield_count - .load(Relaxed) - } + /// Returns the number of times that tasks have been forced to yield back to the scheduler + /// after exhausting their task budgets. + /// + /// This count starts at zero when the runtime is created and increases by one each time a task yields due to exhausting its budget. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + pub fn budget_forced_yield_count(&self) -> u64 { + self.handle + .inner + .scheduler_metrics() + .budget_forced_yield_count + .load(Relaxed) + } - /// Returns the total number of times the given worker thread has parked. - /// - /// The worker park count starts at zero when the runtime is created and - /// increases by one each time the worker parks the thread waiting for new - /// inbound events to process. This usually means the worker has processed - /// all pending work and is currently idle. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_park_count(0); - /// println!("worker 0 parked {} times", n); - /// } - /// ``` - pub fn worker_park_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .park_count - .load(Relaxed) - } + /// Returns the total number of times the given worker thread has parked. + /// + /// The worker park count starts at zero when the runtime is created and + /// increases by one each time the worker parks the thread waiting for new + /// inbound events to process. This usually means the worker has processed + /// all pending work and is currently idle. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_park_count(0); + /// println!("worker 0 parked {} times", n); + /// } + /// ``` + pub fn worker_park_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .park_count + .load(Relaxed) + } - /// Returns the number of times the given worker thread unparked but - /// performed no work before parking again. - /// - /// The worker no-op count starts at zero when the runtime is created and - /// increases by one each time the worker unparks the thread but finds no - /// new work and goes back to sleep. This indicates a false-positive wake up. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_noop_count(0); - /// println!("worker 0 had {} no-op unparks", n); - /// } - /// ``` - pub fn worker_noop_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .noop_count - .load(Relaxed) - } + /// Returns the number of times the given worker thread unparked but + /// performed no work before parking again. + /// + /// The worker no-op count starts at zero when the runtime is created and + /// increases by one each time the worker unparks the thread but finds no + /// new work and goes back to sleep. This indicates a false-positive wake up. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_noop_count(0); + /// println!("worker 0 had {} no-op unparks", n); + /// } + /// ``` + pub fn worker_noop_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .noop_count + .load(Relaxed) + } - /// Returns the number of tasks the given worker thread stole from - /// another worker thread. - /// - /// This metric only applies to the **multi-threaded** runtime and will - /// always return `0` when using the current thread runtime. - /// - /// The worker steal count starts at zero when the runtime is created and - /// increases by `N` each time the worker has processed its scheduled queue - /// and successfully steals `N` more pending tasks from another worker. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_steal_count(0); - /// println!("worker 0 has stolen {} tasks", n); - /// } - /// ``` - pub fn worker_steal_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .steal_count - .load(Relaxed) - } + /// Returns the number of tasks the given worker thread stole from + /// another worker thread. + /// + /// This metric only applies to the **multi-threaded** runtime and will + /// always return `0` when using the current thread runtime. + /// + /// The worker steal count starts at zero when the runtime is created and + /// increases by `N` each time the worker has processed its scheduled queue + /// and successfully steals `N` more pending tasks from another worker. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_steal_count(0); + /// println!("worker 0 has stolen {} tasks", n); + /// } + /// ``` + pub fn worker_steal_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .steal_count + .load(Relaxed) + } - /// Returns the number of times the given worker thread stole tasks from - /// another worker thread. - /// - /// This metric only applies to the **multi-threaded** runtime and will - /// always return `0` when using the current thread runtime. - /// - /// The worker steal count starts at zero when the runtime is created and - /// increases by one each time the worker has processed its scheduled queue - /// and successfully steals more pending tasks from another worker. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_steal_operations(0); - /// println!("worker 0 has stolen tasks {} times", n); - /// } - /// ``` - pub fn worker_steal_operations(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .steal_operations - .load(Relaxed) - } + /// Returns the number of times the given worker thread stole tasks from + /// another worker thread. + /// + /// This metric only applies to the **multi-threaded** runtime and will + /// always return `0` when using the current thread runtime. + /// + /// The worker steal count starts at zero when the runtime is created and + /// increases by one each time the worker has processed its scheduled queue + /// and successfully steals more pending tasks from another worker. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_steal_operations(0); + /// println!("worker 0 has stolen tasks {} times", n); + /// } + /// ``` + pub fn worker_steal_operations(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .steal_operations + .load(Relaxed) + } - /// Returns the number of tasks the given worker thread has polled. - /// - /// The worker poll count starts at zero when the runtime is created and - /// increases by one each time the worker polls a scheduled task. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_poll_count(0); - /// println!("worker 0 has polled {} tasks", n); - /// } - /// ``` - pub fn worker_poll_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .poll_count - .load(Relaxed) - } + /// Returns the number of tasks the given worker thread has polled. + /// + /// The worker poll count starts at zero when the runtime is created and + /// increases by one each time the worker polls a scheduled task. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_poll_count(0); + /// println!("worker 0 has polled {} tasks", n); + /// } + /// ``` + pub fn worker_poll_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .poll_count + .load(Relaxed) + } - /// Returns the amount of time the given worker thread has been busy. - /// - /// The worker busy duration starts at zero when the runtime is created and - /// increases whenever the worker is spending time processing work. Using - /// this value can indicate the load of the given worker. If a lot of time - /// is spent busy, then the worker is under load and will check for inbound - /// events less often. - /// - /// The timer is monotonically increasing. It is never decremented or reset - /// to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_total_busy_duration(0); - /// println!("worker 0 was busy for a total of {:?}", n); - /// } - /// ``` - pub fn worker_total_busy_duration(&self, worker: usize) -> Duration { - let nanos = self - .handle - .inner - .worker_metrics(worker) - .busy_duration_total - .load(Relaxed); - Duration::from_nanos(nanos) - } + /// Returns the amount of time the given worker thread has been busy. + /// + /// The worker busy duration starts at zero when the runtime is created and + /// increases whenever the worker is spending time processing work. Using + /// this value can indicate the load of the given worker. If a lot of time + /// is spent busy, then the worker is under load and will check for inbound + /// events less often. + /// + /// The timer is monotonically increasing. It is never decremented or reset + /// to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_total_busy_duration(0); + /// println!("worker 0 was busy for a total of {:?}", n); + /// } + /// ``` + pub fn worker_total_busy_duration(&self, worker: usize) -> Duration { + let nanos = self + .handle + .inner + .worker_metrics(worker) + .busy_duration_total + .load(Relaxed); + Duration::from_nanos(nanos) + } - /// Returns the number of tasks scheduled from **within** the runtime on the - /// given worker's local queue. - /// - /// The local schedule count starts at zero when the runtime is created and - /// increases by one each time a task is woken from **inside** of the - /// runtime on the given worker. This usually means that a task is spawned - /// or notified from within a runtime thread and will be queued on the - /// worker-local queue. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_local_schedule_count(0); - /// println!("{} tasks were scheduled on the worker's local queue", n); - /// } - /// ``` - pub fn worker_local_schedule_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .local_schedule_count - .load(Relaxed) - } + /// Returns the number of tasks scheduled from **within** the runtime on the + /// given worker's local queue. + /// + /// The local schedule count starts at zero when the runtime is created and + /// increases by one each time a task is woken from **inside** of the + /// runtime on the given worker. This usually means that a task is spawned + /// or notified from within a runtime thread and will be queued on the + /// worker-local queue. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_local_schedule_count(0); + /// println!("{} tasks were scheduled on the worker's local queue", n); + /// } + /// ``` + pub fn worker_local_schedule_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .local_schedule_count + .load(Relaxed) + } - /// Returns the number of times the given worker thread saturated its local - /// queue. - /// - /// This metric only applies to the **multi-threaded** scheduler. - /// - /// The worker overflow count starts at zero when the runtime is created and - /// increases by one each time the worker attempts to schedule a task - /// locally, but its local queue is full. When this happens, half of the - /// local queue is moved to the injection queue. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_overflow_count(0); - /// println!("worker 0 has overflowed its queue {} times", n); - /// } - /// ``` - pub fn worker_overflow_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .overflow_count - .load(Relaxed) + /// Returns the number of times the given worker thread saturated its local + /// queue. + /// + /// This metric only applies to the **multi-threaded** scheduler. + /// + /// The worker overflow count starts at zero when the runtime is created and + /// increases by one each time the worker attempts to schedule a task + /// locally, but its local queue is full. When this happens, half of the + /// local queue is moved to the injection queue. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_overflow_count(0); + /// println!("worker 0 has overflowed its queue {} times", n); + /// } + /// ``` + pub fn worker_overflow_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .overflow_count + .load(Relaxed) + } } /// Returns the number of tasks currently scheduled in the runtime's @@ -704,110 +708,112 @@ impl RuntimeMetrics { .unwrap_or_default() } - /// Returns the number of times the given worker polled tasks with a poll - /// duration within the given bucket's range. - /// - /// Each worker maintains its own histogram and the counts for each bucket - /// starts at zero when the runtime is created. Each time the worker polls a - /// task, it tracks the duration the task poll time took and increments the - /// associated bucket by 1. - /// - /// Each bucket is a monotonically increasing counter. It is never - /// decremented or reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// `bucket` is the index of the bucket being queried. The bucket is scoped - /// to the worker. The range represented by the bucket can be queried by - /// calling [`poll_count_histogram_bucket_range()`]. Each worker maintains - /// identical bucket ranges. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()` or if `bucket` represents an - /// invalid bucket. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::{self, Handle}; - /// - /// fn main() { - /// runtime::Builder::new_current_thread() - /// .enable_metrics_poll_count_histogram() - /// .build() - /// .unwrap() - /// .block_on(async { - /// let metrics = Handle::current().metrics(); - /// let buckets = metrics.poll_count_histogram_num_buckets(); - /// - /// for worker in 0..metrics.num_workers() { - /// for i in 0..buckets { - /// let count = metrics.poll_count_histogram_bucket_count(worker, i); - /// println!("Poll count {}", count); - /// } - /// } - /// }); - /// } - /// ``` - /// - /// [`poll_count_histogram_bucket_range()`]: crate::runtime::RuntimeMetrics::poll_count_histogram_bucket_range - #[track_caller] - pub fn poll_count_histogram_bucket_count(&self, worker: usize, bucket: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .poll_count_histogram - .as_ref() - .map(|histogram| histogram.get(bucket)) - .unwrap_or_default() - } + cfg_64bit_metrics! { + /// Returns the number of times the given worker polled tasks with a poll + /// duration within the given bucket's range. + /// + /// Each worker maintains its own histogram and the counts for each bucket + /// starts at zero when the runtime is created. Each time the worker polls a + /// task, it tracks the duration the task poll time took and increments the + /// associated bucket by 1. + /// + /// Each bucket is a monotonically increasing counter. It is never + /// decremented or reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// `bucket` is the index of the bucket being queried. The bucket is scoped + /// to the worker. The range represented by the bucket can be queried by + /// calling [`poll_count_histogram_bucket_range()`]. Each worker maintains + /// identical bucket ranges. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()` or if `bucket` represents an + /// invalid bucket. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::{self, Handle}; + /// + /// fn main() { + /// runtime::Builder::new_current_thread() + /// .enable_metrics_poll_count_histogram() + /// .build() + /// .unwrap() + /// .block_on(async { + /// let metrics = Handle::current().metrics(); + /// let buckets = metrics.poll_count_histogram_num_buckets(); + /// + /// for worker in 0..metrics.num_workers() { + /// for i in 0..buckets { + /// let count = metrics.poll_count_histogram_bucket_count(worker, i); + /// println!("Poll count {}", count); + /// } + /// } + /// }); + /// } + /// ``` + /// + /// [`poll_count_histogram_bucket_range()`]: crate::runtime::RuntimeMetrics::poll_count_histogram_bucket_range + #[track_caller] + pub fn poll_count_histogram_bucket_count(&self, worker: usize, bucket: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .poll_count_histogram + .as_ref() + .map(|histogram| histogram.get(bucket)) + .unwrap_or_default() + } - /// Returns the mean duration of task polls, in nanoseconds. - /// - /// This is an exponentially weighted moving average. Currently, this metric - /// is only provided by the multi-threaded runtime. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_mean_poll_time(0); - /// println!("worker 0 has a mean poll time of {:?}", n); - /// } - /// ``` - #[track_caller] - pub fn worker_mean_poll_time(&self, worker: usize) -> Duration { - let nanos = self - .handle - .inner - .worker_metrics(worker) - .mean_poll_time - .load(Relaxed); - Duration::from_nanos(nanos) + /// Returns the mean duration of task polls, in nanoseconds. + /// + /// This is an exponentially weighted moving average. Currently, this metric + /// is only provided by the multi-threaded runtime. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_mean_poll_time(0); + /// println!("worker 0 has a mean poll time of {:?}", n); + /// } + /// ``` + #[track_caller] + pub fn worker_mean_poll_time(&self, worker: usize) -> Duration { + let nanos = self + .handle + .inner + .worker_metrics(worker) + .mean_poll_time + .load(Relaxed); + Duration::from_nanos(nanos) + } } /// Returns the number of tasks currently scheduled in the blocking @@ -837,88 +843,90 @@ impl RuntimeMetrics { cfg_net! { impl RuntimeMetrics { - /// Returns the number of file descriptors that have been registered with the - /// runtime's I/O driver. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let registered_fds = metrics.io_driver_fd_registered_count(); - /// println!("{} fds have been registered with the runtime's I/O driver.", registered_fds); - /// - /// let deregistered_fds = metrics.io_driver_fd_deregistered_count(); - /// - /// let current_fd_count = registered_fds - deregistered_fds; - /// println!("{} fds are currently registered by the runtime's I/O driver.", current_fd_count); - /// } - /// ``` - pub fn io_driver_fd_registered_count(&self) -> u64 { - self.with_io_driver_metrics(|m| { - m.fd_registered_count.load(Relaxed) - }) - } + cfg_64bit_metrics! { + /// Returns the number of file descriptors that have been registered with the + /// runtime's I/O driver. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let registered_fds = metrics.io_driver_fd_registered_count(); + /// println!("{} fds have been registered with the runtime's I/O driver.", registered_fds); + /// + /// let deregistered_fds = metrics.io_driver_fd_deregistered_count(); + /// + /// let current_fd_count = registered_fds - deregistered_fds; + /// println!("{} fds are currently registered by the runtime's I/O driver.", current_fd_count); + /// } + /// ``` + pub fn io_driver_fd_registered_count(&self) -> u64 { + self.with_io_driver_metrics(|m| { + m.fd_registered_count.load(Relaxed) + }) + } - /// Returns the number of file descriptors that have been deregistered by the - /// runtime's I/O driver. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.io_driver_fd_deregistered_count(); - /// println!("{} fds have been deregistered by the runtime's I/O driver.", n); - /// } - /// ``` - pub fn io_driver_fd_deregistered_count(&self) -> u64 { - self.with_io_driver_metrics(|m| { - m.fd_deregistered_count.load(Relaxed) - }) - } + /// Returns the number of file descriptors that have been deregistered by the + /// runtime's I/O driver. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.io_driver_fd_deregistered_count(); + /// println!("{} fds have been deregistered by the runtime's I/O driver.", n); + /// } + /// ``` + pub fn io_driver_fd_deregistered_count(&self) -> u64 { + self.with_io_driver_metrics(|m| { + m.fd_deregistered_count.load(Relaxed) + }) + } - /// Returns the number of ready events processed by the runtime's - /// I/O driver. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.io_driver_ready_count(); - /// println!("{} ready events processed by the runtime's I/O driver.", n); - /// } - /// ``` - pub fn io_driver_ready_count(&self) -> u64 { - self.with_io_driver_metrics(|m| m.ready_count.load(Relaxed)) - } + /// Returns the number of ready events processed by the runtime's + /// I/O driver. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.io_driver_ready_count(); + /// println!("{} ready events processed by the runtime's I/O driver.", n); + /// } + /// ``` + pub fn io_driver_ready_count(&self) -> u64 { + self.with_io_driver_metrics(|m| m.ready_count.load(Relaxed)) + } - fn with_io_driver_metrics(&self, f: F) -> u64 - where - F: Fn(&super::IoDriverMetrics) -> u64, - { - // TODO: Investigate if this should return 0, most of our metrics always increase - // thus this breaks that guarantee. - self.handle - .inner - .driver() - .io - .as_ref() - .map(|h| f(&h.metrics)) - .unwrap_or(0) + fn with_io_driver_metrics(&self, f: F) -> u64 + where + F: Fn(&super::IoDriverMetrics) -> u64, + { + // TODO: Investigate if this should return 0, most of our metrics always increase + // thus this breaks that guarantee. + self.handle + .inner + .driver() + .io + .as_ref() + .map(|h| f(&h.metrics)) + .unwrap_or(0) + } } } } diff --git a/tokio/src/runtime/metrics/scheduler.rs b/tokio/src/runtime/metrics/scheduler.rs index d9f8edfaabc..8b64eced38c 100644 --- a/tokio/src/runtime/metrics/scheduler.rs +++ b/tokio/src/runtime/metrics/scheduler.rs @@ -1,4 +1,5 @@ -use crate::loom::sync::atomic::{AtomicU64, Ordering::Relaxed}; +use crate::loom::sync::atomic::Ordering::Relaxed; +use crate::util::metric_atomics::MetricAtomicU64; /// Retrieves metrics from the Tokio runtime. /// @@ -10,25 +11,25 @@ use crate::loom::sync::atomic::{AtomicU64, Ordering::Relaxed}; #[derive(Debug)] pub(crate) struct SchedulerMetrics { /// Number of tasks that are scheduled from outside the runtime. - pub(super) remote_schedule_count: AtomicU64, - pub(super) budget_forced_yield_count: AtomicU64, + pub(super) remote_schedule_count: MetricAtomicU64, + pub(super) budget_forced_yield_count: MetricAtomicU64, } impl SchedulerMetrics { pub(crate) fn new() -> SchedulerMetrics { SchedulerMetrics { - remote_schedule_count: AtomicU64::new(0), - budget_forced_yield_count: AtomicU64::new(0), + remote_schedule_count: MetricAtomicU64::new(0), + budget_forced_yield_count: MetricAtomicU64::new(0), } } /// Increment the number of tasks scheduled externally pub(crate) fn inc_remote_schedule_count(&self) { - self.remote_schedule_count.fetch_add(1, Relaxed); + self.remote_schedule_count.add(1, Relaxed); } /// Increment the number of tasks forced to yield due to budget exhaustion pub(crate) fn inc_budget_forced_yield_count(&self) { - self.budget_forced_yield_count.fetch_add(1, Relaxed); + self.budget_forced_yield_count.add(1, Relaxed); } } diff --git a/tokio/src/runtime/metrics/worker.rs b/tokio/src/runtime/metrics/worker.rs index cefe4d2abc6..fc7c4e6dfe4 100644 --- a/tokio/src/runtime/metrics/worker.rs +++ b/tokio/src/runtime/metrics/worker.rs @@ -1,7 +1,8 @@ +use crate::loom::sync::atomic::AtomicUsize; use crate::loom::sync::atomic::Ordering::Relaxed; -use crate::loom::sync::atomic::{AtomicU64, AtomicUsize}; use crate::runtime::metrics::Histogram; use crate::runtime::Config; +use crate::util::metric_atomics::MetricAtomicU64; /// Retrieve runtime worker metrics. /// @@ -14,31 +15,31 @@ use crate::runtime::Config; #[repr(align(128))] pub(crate) struct WorkerMetrics { /// Number of times the worker parked. - pub(crate) park_count: AtomicU64, + pub(crate) park_count: MetricAtomicU64, /// Number of times the worker woke then parked again without doing work. - pub(crate) noop_count: AtomicU64, + pub(crate) noop_count: MetricAtomicU64, /// Number of tasks the worker stole. - pub(crate) steal_count: AtomicU64, + pub(crate) steal_count: MetricAtomicU64, /// Number of times the worker stole - pub(crate) steal_operations: AtomicU64, + pub(crate) steal_operations: MetricAtomicU64, /// Number of tasks the worker polled. - pub(crate) poll_count: AtomicU64, + pub(crate) poll_count: MetricAtomicU64, /// EWMA task poll time, in nanoseconds. - pub(crate) mean_poll_time: AtomicU64, + pub(crate) mean_poll_time: MetricAtomicU64, /// Amount of time the worker spent doing work vs. parking. - pub(crate) busy_duration_total: AtomicU64, + pub(crate) busy_duration_total: MetricAtomicU64, /// Number of tasks scheduled for execution on the worker's local queue. - pub(crate) local_schedule_count: AtomicU64, + pub(crate) local_schedule_count: MetricAtomicU64, /// Number of tasks moved from the local queue to the global queue to free space. - pub(crate) overflow_count: AtomicU64, + pub(crate) overflow_count: MetricAtomicU64, /// Number of tasks currently in the local queue. Used only by the /// current-thread scheduler. @@ -60,15 +61,15 @@ impl WorkerMetrics { pub(crate) fn new() -> WorkerMetrics { WorkerMetrics { - park_count: AtomicU64::new(0), - noop_count: AtomicU64::new(0), - steal_count: AtomicU64::new(0), - steal_operations: AtomicU64::new(0), - poll_count: AtomicU64::new(0), - mean_poll_time: AtomicU64::new(0), - overflow_count: AtomicU64::new(0), - busy_duration_total: AtomicU64::new(0), - local_schedule_count: AtomicU64::new(0), + park_count: MetricAtomicU64::new(0), + noop_count: MetricAtomicU64::new(0), + steal_count: MetricAtomicU64::new(0), + steal_operations: MetricAtomicU64::new(0), + poll_count: MetricAtomicU64::new(0), + mean_poll_time: MetricAtomicU64::new(0), + overflow_count: MetricAtomicU64::new(0), + busy_duration_total: MetricAtomicU64::new(0), + local_schedule_count: MetricAtomicU64::new(0), queue_depth: AtomicUsize::new(0), poll_count_histogram: None, } diff --git a/tokio/src/runtime/tests/queue.rs b/tokio/src/runtime/tests/queue.rs index 5df92b7a291..55429b1b11b 100644 --- a/tokio/src/runtime/tests/queue.rs +++ b/tokio/src/runtime/tests/queue.rs @@ -7,18 +7,21 @@ use std::time::Duration; #[allow(unused)] macro_rules! assert_metrics { - ($stats:ident, $field:ident == $v:expr) => {{ - use crate::runtime::WorkerMetrics; - use std::sync::atomic::Ordering::Relaxed; + ($stats:ident, $field:ident == $v:expr) => { + #[cfg(target_has_atomic = "64")] + { + use crate::runtime::WorkerMetrics; + use std::sync::atomic::Ordering::Relaxed; - let worker = WorkerMetrics::new(); - $stats.submit(&worker); + let worker = WorkerMetrics::new(); + $stats.submit(&worker); - let expect = $v; - let actual = worker.$field.load(Relaxed); + let expect = $v; + let actual = worker.$field.load(Relaxed); - assert!(actual == expect, "expect = {}; actual = {}", expect, actual) - }}; + assert!(actual == expect, "expect = {}; actual = {}", expect, actual) + } + }; } fn new_stats() -> Stats { diff --git a/tokio/src/util/metric_atomics.rs b/tokio/src/util/metric_atomics.rs new file mode 100644 index 00000000000..3c080298ecf --- /dev/null +++ b/tokio/src/util/metric_atomics.rs @@ -0,0 +1,47 @@ +use std::sync::atomic::Ordering; + +cfg_64bit_metrics! { + use std::sync::atomic::AtomicU64; +} + +/// `AtomicU64` that is is a no-op on platforms without 64-bit atomics +/// +/// When used on platforms without 64-bit atomics, writes to this are no-ops. +/// The `load` method is only defined when 64-bit atomics are available. +#[derive(Debug, Default)] +pub(crate) struct MetricAtomicU64 { + #[cfg(target_has_atomic = "64")] + value: AtomicU64, +} + +// some of these are currently only used behind cfg_unstable +#[allow(dead_code)] +impl MetricAtomicU64 { + // Load is only defined when supported + cfg_64bit_metrics! { + pub(crate) fn load(&self, ordering: Ordering) -> u64 { + self.value.load(ordering) + } + } + + cfg_64bit_metrics! { + pub(crate) fn store(&self, val: u64, ordering: Ordering) { + self.value.store(val, ordering) + } + + pub(crate) fn new(value: u64) -> Self { + Self { value: AtomicU64::new(value) } + } + + pub(crate) fn add(&self, value: u64, ordering: Ordering) { + self.value.fetch_add(value, ordering); + } + } + + cfg_no_64bit_metrics! { + pub(crate) fn store(&self, _val: u64, _ordering: Ordering) { } + // on platforms without 64-bit atomics, fetch-add returns unit + pub(crate) fn add(&self, _value: u64, _ordering: Ordering) { } + pub(crate) fn new(_value: u64) -> Self { Self { } } + } +} diff --git a/tokio/src/util/mod.rs b/tokio/src/util/mod.rs index 7cf371195ff..3722b0bc2d4 100644 --- a/tokio/src/util/mod.rs +++ b/tokio/src/util/mod.rs @@ -5,6 +5,8 @@ cfg_io_driver! { #[cfg(feature = "rt")] pub(crate) mod atomic_cell; +pub(crate) mod metric_atomics; + #[cfg(any(feature = "rt", feature = "signal", feature = "process"))] pub(crate) mod once_cell; diff --git a/tokio/tests/rt_basic.rs b/tokio/tests/rt_basic.rs index a5204bd83f7..4c558c90e28 100644 --- a/tokio/tests/rt_basic.rs +++ b/tokio/tests/rt_basic.rs @@ -19,7 +19,7 @@ mod support { macro_rules! cfg_metrics { ($($t:tt)*) => { - #[cfg(tokio_unstable)] + #[cfg(all(tokio_unstable, target_has_atomic = "64"))] { $( $t )* } diff --git a/tokio/tests/rt_metrics.rs b/tokio/tests/rt_metrics.rs index 7f0c9ad8052..6a710a46ce6 100644 --- a/tokio/tests/rt_metrics.rs +++ b/tokio/tests/rt_metrics.rs @@ -1,6 +1,11 @@ #![allow(unknown_lints, unexpected_cfgs)] #![warn(rust_2018_idioms)] -#![cfg(all(feature = "full", tokio_unstable, not(target_os = "wasi")))] +#![cfg(all( + feature = "full", + tokio_unstable, + not(target_os = "wasi"), + target_has_atomic = "64" +))] use std::future::Future; use std::sync::{Arc, Barrier, Mutex}; diff --git a/tokio/tests/rt_threaded.rs b/tokio/tests/rt_threaded.rs index 26690550f93..a4742dd234e 100644 --- a/tokio/tests/rt_threaded.rs +++ b/tokio/tests/rt_threaded.rs @@ -18,7 +18,7 @@ use std::task::{Context, Poll, Waker}; macro_rules! cfg_metrics { ($($t:tt)*) => { - #[cfg(tokio_unstable)] + #[cfg(all(tokio_unstable, target_has_atomic = "64"))] { $( $t )* } diff --git a/tokio/tests/rt_threaded_alt.rs b/tokio/tests/rt_threaded_alt.rs index 9eed1fe78b6..33af45e68bb 100644 --- a/tokio/tests/rt_threaded_alt.rs +++ b/tokio/tests/rt_threaded_alt.rs @@ -19,7 +19,7 @@ use std::task::{Context, Poll, Waker}; macro_rules! cfg_metrics { ($($t:tt)*) => { - #[cfg(tokio_unstable)] + #[cfg(all(tokio_unstable, target_has_atomic = "64"))] { $( $t )* } From 12920cea45e81bf831eb7174a3337b6d06b0b27d Mon Sep 17 00:00:00 2001 From: Alan Somers Date: Sat, 25 May 2024 09:30:36 -0600 Subject: [PATCH 020/119] tests: update nix and mio-aio dependencies (#6552) nix 0.29.0 and mio-aio 0.9.0 use I/O Safety. Co-authored-by: Frederick Mayle --- Cargo.toml | 1 - tokio/Cargo.toml | 4 ++-- tokio/tests/io_async_fd.rs | 31 +++++++++---------------------- tokio/tests/io_poll_aio.rs | 13 +++++++------ tokio/tests/net_unix_pipe.rs | 4 +--- 5 files changed, 19 insertions(+), 34 deletions(-) diff --git a/Cargo.toml b/Cargo.toml index d8ac248189d..2238deac71c 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -17,4 +17,3 @@ members = [ [workspace.metadata.spellcheck] config = "spellcheck.toml" - diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index 020cc1e4ac2..e46e274c47a 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -118,7 +118,7 @@ signal-hook-registry = { version = "1.1.1", optional = true } [target.'cfg(unix)'.dev-dependencies] libc = { version = "0.2.149" } -nix = { version = "0.27.1", default-features = false, features = ["fs", "socket"] } +nix = { version = "0.29.0", default-features = false, features = ["aio", "fs", "socket"] } [target.'cfg(windows)'.dependencies.windows-sys] version = "0.48" @@ -149,7 +149,7 @@ rand = "0.8.0" wasm-bindgen-test = "0.3.0" [target.'cfg(target_os = "freebsd")'.dev-dependencies] -mio-aio = { version = "0.8.0", features = ["tokio"] } +mio-aio = { version = "0.9.0", features = ["tokio"] } [target.'cfg(loom)'.dev-dependencies] loom = { version = "0.7", features = ["futures", "checkpoint"] } diff --git a/tokio/tests/io_async_fd.rs b/tokio/tests/io_async_fd.rs index ea798b3067a..4e6f630eb93 100644 --- a/tokio/tests/io_async_fd.rs +++ b/tokio/tests/io_async_fd.rs @@ -1,7 +1,7 @@ #![warn(rust_2018_idioms)] #![cfg(all(unix, feature = "full"))] -use std::os::unix::io::{AsRawFd, IntoRawFd, RawFd}; +use std::os::unix::io::{AsRawFd, RawFd}; use std::sync::{ atomic::{AtomicBool, Ordering}, Arc, @@ -13,7 +13,7 @@ use std::{ task::{Context, Waker}, }; -use nix::unistd::{close, read, write}; +use nix::unistd::{read, write}; use futures::poll; @@ -58,18 +58,18 @@ impl TestWaker { #[derive(Debug)] struct FileDescriptor { - fd: RawFd, + fd: std::os::fd::OwnedFd, } impl AsRawFd for FileDescriptor { fn as_raw_fd(&self) -> RawFd { - self.fd + self.fd.as_raw_fd() } } impl Read for &FileDescriptor { fn read(&mut self, buf: &mut [u8]) -> io::Result { - read(self.fd, buf).map_err(io::Error::from) + read(self.fd.as_raw_fd(), buf).map_err(io::Error::from) } } @@ -81,7 +81,7 @@ impl Read for FileDescriptor { impl Write for &FileDescriptor { fn write(&mut self, buf: &[u8]) -> io::Result { - write(self.fd, buf).map_err(io::Error::from) + write(&self.fd, buf).map_err(io::Error::from) } fn flush(&mut self) -> io::Result<()> { @@ -99,12 +99,6 @@ impl Write for FileDescriptor { } } -impl Drop for FileDescriptor { - fn drop(&mut self) { - let _ = close(self.fd); - } -} - fn set_nonblocking(fd: RawFd) { use nix::fcntl::{OFlag, F_GETFL, F_SETFL}; @@ -133,17 +127,10 @@ fn socketpair() -> (FileDescriptor, FileDescriptor) { SockFlag::empty(), ) .expect("socketpair"); - let fds = ( - FileDescriptor { - fd: fd_a.into_raw_fd(), - }, - FileDescriptor { - fd: fd_b.into_raw_fd(), - }, - ); + let fds = (FileDescriptor { fd: fd_a }, FileDescriptor { fd: fd_b }); - set_nonblocking(fds.0.fd); - set_nonblocking(fds.1.fd); + set_nonblocking(fds.0.fd.as_raw_fd()); + set_nonblocking(fds.1.fd.as_raw_fd()); fds } diff --git a/tokio/tests/io_poll_aio.rs b/tokio/tests/io_poll_aio.rs index e83859f5c98..242887eb60f 100644 --- a/tokio/tests/io_poll_aio.rs +++ b/tokio/tests/io_poll_aio.rs @@ -5,6 +5,7 @@ use mio_aio::{AioFsyncMode, SourceApi}; use std::{ future::Future, io, mem, + os::fd::AsFd, os::unix::io::{AsRawFd, RawFd}, pin::{pin, Pin}, task::{Context, Poll}, @@ -17,9 +18,9 @@ mod aio { use super::*; #[derive(Debug)] - struct TokioSource(mio_aio::Source); + struct TokioSource<'fd>(mio_aio::Source>); - impl AioSource for TokioSource { + impl<'fd> AioSource for TokioSource<'fd> { fn register(&mut self, kq: RawFd, token: usize) { self.0.register_raw(kq, token) } @@ -29,9 +30,9 @@ mod aio { } /// A very crude implementation of an AIO-based future - struct FsyncFut(Aio); + struct FsyncFut<'fd>(Aio>); - impl FsyncFut { + impl<'fd> FsyncFut<'fd> { pub fn submit(self: Pin<&mut Self>) -> io::Result<()> { let p = unsafe { self.map_unchecked_mut(|s| &mut s.0 .0) }; match p.submit() { @@ -41,7 +42,7 @@ mod aio { } } - impl Future for FsyncFut { + impl<'fd> Future for FsyncFut<'fd> { type Output = io::Result<()>; fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { @@ -134,7 +135,7 @@ mod aio { #[tokio::test] async fn fsync() { let f = tempfile().unwrap(); - let fd = f.as_raw_fd(); + let fd = f.as_fd(); let mode = AioFsyncMode::O_SYNC; let source = TokioSource(mio_aio::Fsync::fsync(fd, mode, 0)); let poll_aio = Aio::new_for_aio(source).unwrap(); diff --git a/tokio/tests/net_unix_pipe.rs b/tokio/tests/net_unix_pipe.rs index 6706880ed1b..37b8b41bd31 100644 --- a/tokio/tests/net_unix_pipe.rs +++ b/tokio/tests/net_unix_pipe.rs @@ -489,12 +489,10 @@ async fn anon_pipe_spawn_echo() -> std::io::Result<()> { #[cfg(target_os = "linux")] async fn anon_pipe_from_owned_fd() -> std::io::Result<()> { use nix::fcntl::OFlag; - use std::os::unix::io::{FromRawFd, OwnedFd}; const DATA: &[u8] = b"this is some data to write to the pipe"; - let fds = nix::unistd::pipe2(OFlag::O_CLOEXEC | OFlag::O_NONBLOCK)?; - let (rx_fd, tx_fd) = unsafe { (OwnedFd::from_raw_fd(fds.0), OwnedFd::from_raw_fd(fds.1)) }; + let (rx_fd, tx_fd) = nix::unistd::pipe2(OFlag::O_CLOEXEC | OFlag::O_NONBLOCK)?; let mut rx = pipe::Receiver::from_owned_fd(rx_fd)?; let mut tx = pipe::Sender::from_owned_fd(tx_fd)?; From 0a85a9662d30139c779ea49a59be30db0f292b5d Mon Sep 17 00:00:00 2001 From: Maxwell Borden Date: Sat, 25 May 2024 22:14:59 +0200 Subject: [PATCH 021/119] net: implement `Clone` for `NamedPipeInfo` (#6586) --- tokio/src/net/windows/named_pipe.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tokio/src/net/windows/named_pipe.rs b/tokio/src/net/windows/named_pipe.rs index 98e63f0c450..81148482537 100644 --- a/tokio/src/net/windows/named_pipe.rs +++ b/tokio/src/net/windows/named_pipe.rs @@ -2626,7 +2626,7 @@ pub enum PipeEnd { /// Information about a named pipe. /// /// Constructed through [`NamedPipeServer::info`] or [`NamedPipeClient::info`]. -#[derive(Debug)] +#[derive(Debug, Clone)] #[non_exhaustive] pub struct PipeInfo { /// Indicates the mode of a named pipe. From 2890d0c3db4f595330d8d223bfbfeb81e205b048 Mon Sep 17 00:00:00 2001 From: Conrad Ludgate Date: Sat, 25 May 2024 22:49:17 +0100 Subject: [PATCH 022/119] metrics: fix blocking_threads count (#6551) --- tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs | 5 ++++- .../src/runtime/scheduler/multi_thread_alt/handle/metrics.rs | 5 ++++- tokio/tests/rt_metrics.rs | 5 +++++ 3 files changed, 13 insertions(+), 2 deletions(-) diff --git a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs index 838694fc89e..3d614b478c5 100644 --- a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs +++ b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs @@ -8,7 +8,10 @@ impl Handle { } pub(crate) fn num_blocking_threads(&self) -> usize { - self.blocking_spawner.num_threads() + // workers are currently spawned using spawn_blocking + self.blocking_spawner + .num_threads() + .saturating_sub(self.num_workers()) } pub(crate) fn num_idle_blocking_threads(&self) -> usize { diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs b/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs index 838694fc89e..3d614b478c5 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs @@ -8,7 +8,10 @@ impl Handle { } pub(crate) fn num_blocking_threads(&self) -> usize { - self.blocking_spawner.num_threads() + // workers are currently spawned using spawn_blocking + self.blocking_spawner + .num_threads() + .saturating_sub(self.num_workers()) } pub(crate) fn num_idle_blocking_threads(&self) -> usize { diff --git a/tokio/tests/rt_metrics.rs b/tokio/tests/rt_metrics.rs index 6a710a46ce6..2446deb6b41 100644 --- a/tokio/tests/rt_metrics.rs +++ b/tokio/tests/rt_metrics.rs @@ -31,6 +31,11 @@ fn num_blocking_threads() { assert_eq!(0, rt.metrics().num_blocking_threads()); let _ = rt.block_on(rt.spawn_blocking(move || {})); assert_eq!(1, rt.metrics().num_blocking_threads()); + + let rt = threaded(); + assert_eq!(0, rt.metrics().num_blocking_threads()); + let _ = rt.block_on(rt.spawn_blocking(move || {})); + assert_eq!(1, rt.metrics().num_blocking_threads()); } #[test] From 3a6fdc05681841c30fe4e27b63924c7908ea4634 Mon Sep 17 00:00:00 2001 From: Josh McKinney Date: Sun, 26 May 2024 02:29:27 -0700 Subject: [PATCH 023/119] license: fix formatting and remove year in licenses (#6451) --- LICENSE | 40 ++++++++++++++++++---------------------- tokio-macros/LICENSE | 29 ++--------------------------- tokio-stream/LICENSE | 40 ++++++++++++++++++---------------------- tokio-test/LICENSE | 40 ++++++++++++++++++---------------------- tokio-util/LICENSE | 40 ++++++++++++++++++---------------------- tokio/LICENSE | 40 ++++++++++++++++++---------------------- 6 files changed, 92 insertions(+), 137 deletions(-) diff --git a/LICENSE b/LICENSE index 8bdf6bd60d3..f0dbcf4b45d 100644 --- a/LICENSE +++ b/LICENSE @@ -1,25 +1,21 @@ -Copyright (c) 2023 Tokio Contributors +MIT License -Permission is hereby granted, free of charge, to any -person obtaining a copy of this software and associated -documentation files (the "Software"), to deal in the -Software without restriction, including without -limitation the rights to use, copy, modify, merge, -publish, distribute, sublicense, and/or sell copies of -the Software, and to permit persons to whom the Software -is furnished to do so, subject to the following -conditions: +Copyright (c) Tokio Contributors -The above copyright notice and this permission notice -shall be included in all copies or substantial portions -of the Software. +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF -ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED -TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A -PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT -SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR -IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -DEALINGS IN THE SOFTWARE. +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/tokio-macros/LICENSE b/tokio-macros/LICENSE index 12d1037fd0c..c4d82b91d6d 100644 --- a/tokio-macros/LICENSE +++ b/tokio-macros/LICENSE @@ -1,32 +1,7 @@ -Copyright (c) 2023 Tokio Contributors - -Permission is hereby granted, free of charge, to any -person obtaining a copy of this software and associated -documentation files (the "Software"), to deal in the -Software without restriction, including without -limitation the rights to use, copy, modify, merge, -publish, distribute, sublicense, and/or sell copies of -the Software, and to permit persons to whom the Software -is furnished to do so, subject to the following -conditions: - -The above copyright notice and this permission notice -shall be included in all copies or substantial portions -of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF -ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED -TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A -PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT -SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR -IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -DEALINGS IN THE SOFTWARE. - -The MIT License (MIT) +MIT License Copyright (c) 2019 Yoshua Wuyts +Copyright (c) Tokio Contributors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal diff --git a/tokio-stream/LICENSE b/tokio-stream/LICENSE index 8bdf6bd60d3..f0dbcf4b45d 100644 --- a/tokio-stream/LICENSE +++ b/tokio-stream/LICENSE @@ -1,25 +1,21 @@ -Copyright (c) 2023 Tokio Contributors +MIT License -Permission is hereby granted, free of charge, to any -person obtaining a copy of this software and associated -documentation files (the "Software"), to deal in the -Software without restriction, including without -limitation the rights to use, copy, modify, merge, -publish, distribute, sublicense, and/or sell copies of -the Software, and to permit persons to whom the Software -is furnished to do so, subject to the following -conditions: +Copyright (c) Tokio Contributors -The above copyright notice and this permission notice -shall be included in all copies or substantial portions -of the Software. +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF -ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED -TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A -PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT -SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR -IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -DEALINGS IN THE SOFTWARE. +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/tokio-test/LICENSE b/tokio-test/LICENSE index 8bdf6bd60d3..f0dbcf4b45d 100644 --- a/tokio-test/LICENSE +++ b/tokio-test/LICENSE @@ -1,25 +1,21 @@ -Copyright (c) 2023 Tokio Contributors +MIT License -Permission is hereby granted, free of charge, to any -person obtaining a copy of this software and associated -documentation files (the "Software"), to deal in the -Software without restriction, including without -limitation the rights to use, copy, modify, merge, -publish, distribute, sublicense, and/or sell copies of -the Software, and to permit persons to whom the Software -is furnished to do so, subject to the following -conditions: +Copyright (c) Tokio Contributors -The above copyright notice and this permission notice -shall be included in all copies or substantial portions -of the Software. +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF -ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED -TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A -PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT -SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR -IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -DEALINGS IN THE SOFTWARE. +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/tokio-util/LICENSE b/tokio-util/LICENSE index 8bdf6bd60d3..f0dbcf4b45d 100644 --- a/tokio-util/LICENSE +++ b/tokio-util/LICENSE @@ -1,25 +1,21 @@ -Copyright (c) 2023 Tokio Contributors +MIT License -Permission is hereby granted, free of charge, to any -person obtaining a copy of this software and associated -documentation files (the "Software"), to deal in the -Software without restriction, including without -limitation the rights to use, copy, modify, merge, -publish, distribute, sublicense, and/or sell copies of -the Software, and to permit persons to whom the Software -is furnished to do so, subject to the following -conditions: +Copyright (c) Tokio Contributors -The above copyright notice and this permission notice -shall be included in all copies or substantial portions -of the Software. +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF -ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED -TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A -PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT -SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR -IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -DEALINGS IN THE SOFTWARE. +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/tokio/LICENSE b/tokio/LICENSE index 8bdf6bd60d3..f0dbcf4b45d 100644 --- a/tokio/LICENSE +++ b/tokio/LICENSE @@ -1,25 +1,21 @@ -Copyright (c) 2023 Tokio Contributors +MIT License -Permission is hereby granted, free of charge, to any -person obtaining a copy of this software and associated -documentation files (the "Software"), to deal in the -Software without restriction, including without -limitation the rights to use, copy, modify, merge, -publish, distribute, sublicense, and/or sell copies of -the Software, and to permit persons to whom the Software -is furnished to do so, subject to the following -conditions: +Copyright (c) Tokio Contributors -The above copyright notice and this permission notice -shall be included in all copies or substantial portions -of the Software. +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF -ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED -TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A -PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT -SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR -IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -DEALINGS IN THE SOFTWARE. +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. From 6c42d286b343f498ce29de2aab9358a0aedb081c Mon Sep 17 00:00:00 2001 From: Maxwell Borden Date: Sun, 26 May 2024 12:25:19 +0200 Subject: [PATCH 024/119] net: fix misleading `NamedPipeServer` example (#6590) The previous NamedPipeServer doc example seemed to imply that the return type of `NamedPipeServer::connect()` was a `Future>>`, however, `connect()` returns a `Future>>`. The following line of code reopening the pipe would shadow the newly connected pipe immediately, making the following spawned task pointless. Hopefully these changes make it more clear what should be happening in the example. --- tokio/src/net/windows/named_pipe.rs | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tokio/src/net/windows/named_pipe.rs b/tokio/src/net/windows/named_pipe.rs index 81148482537..0b312f896f1 100644 --- a/tokio/src/net/windows/named_pipe.rs +++ b/tokio/src/net/windows/named_pipe.rs @@ -75,7 +75,8 @@ use self::doc::*; /// let server = tokio::spawn(async move { /// loop { /// // Wait for a client to connect. -/// let connected = server.connect().await?; +/// server.connect().await?; +/// let connected_client = server; /// /// // Construct the next server to be connected before sending the one /// // we already have of onto a task. This ensures that the server From 9e00b266e08d263c497dc9de57d9acbc049ae69b Mon Sep 17 00:00:00 2001 From: Pau Freixes Date: Mon, 27 May 2024 13:18:34 +0200 Subject: [PATCH 025/119] sync: add `Notify::notify_last` (#6520) --- tokio/src/sync/notify.rs | 82 +++++++++++++++++++++++++++-------- tokio/src/util/linked_list.rs | 20 +++++++++ tokio/tests/sync_notify.rs | 75 ++++++++++++++++++++++++++++++++ 3 files changed, 160 insertions(+), 17 deletions(-) diff --git a/tokio/src/sync/notify.rs b/tokio/src/sync/notify.rs index 879b89b4069..5d344f70411 100644 --- a/tokio/src/sync/notify.rs +++ b/tokio/src/sync/notify.rs @@ -223,7 +223,9 @@ struct Waiter { /// `Notify`, or it is exclusively owned by the enclosing `Waiter`. waker: UnsafeCell>, - /// Notification for this waiter. + /// Notification for this waiter. Uses 2 bits to store if and how was + /// notified, 1 bit for storing if it was woken up using FIFO or LIFO, and + /// the rest of it is unused. /// * if it's `None`, then `waker` is protected by the `waiters` lock. /// * if it's `Some`, then `waker` is exclusively owned by the /// enclosing `Waiter` and can be accessed without locking. @@ -253,13 +255,16 @@ generate_addr_of_methods! { } // No notification. -const NOTIFICATION_NONE: usize = 0; +const NOTIFICATION_NONE: usize = 0b000; // Notification type used by `notify_one`. -const NOTIFICATION_ONE: usize = 1; +const NOTIFICATION_ONE: usize = 0b001; + +// Notification type used by `notify_last`. +const NOTIFICATION_LAST: usize = 0b101; // Notification type used by `notify_waiters`. -const NOTIFICATION_ALL: usize = 2; +const NOTIFICATION_ALL: usize = 0b010; /// Notification for a `Waiter`. /// This struct is equivalent to `Option`, but uses @@ -275,13 +280,20 @@ impl AtomicNotification { /// Store-release a notification. /// This method should be called exactly once. fn store_release(&self, notification: Notification) { - self.0.store(notification as usize, Release); + let data: usize = match notification { + Notification::All => NOTIFICATION_ALL, + Notification::One(NotifyOneStrategy::Fifo) => NOTIFICATION_ONE, + Notification::One(NotifyOneStrategy::Lifo) => NOTIFICATION_LAST, + }; + self.0.store(data, Release); } fn load(&self, ordering: Ordering) -> Option { - match self.0.load(ordering) { + let data = self.0.load(ordering); + match data { NOTIFICATION_NONE => None, - NOTIFICATION_ONE => Some(Notification::One), + NOTIFICATION_ONE => Some(Notification::One(NotifyOneStrategy::Fifo)), + NOTIFICATION_LAST => Some(Notification::One(NotifyOneStrategy::Lifo)), NOTIFICATION_ALL => Some(Notification::All), _ => unreachable!(), } @@ -296,11 +308,18 @@ impl AtomicNotification { } } +#[derive(Debug, PartialEq, Eq)] +#[repr(usize)] +enum NotifyOneStrategy { + Fifo, + Lifo, +} + #[derive(Debug, PartialEq, Eq)] #[repr(usize)] enum Notification { - One = NOTIFICATION_ONE, - All = NOTIFICATION_ALL, + One(NotifyOneStrategy), + All, } /// List used in `Notify::notify_waiters`. It wraps a guarded linked list @@ -521,7 +540,7 @@ impl Notify { } } - /// Notifies a waiting task. + /// Notifies the first waiting task. /// /// If a task is currently waiting, that task is notified. Otherwise, a /// permit is stored in this `Notify` value and the **next** call to @@ -558,6 +577,23 @@ impl Notify { // Alias for old name in 0.x #[cfg_attr(docsrs, doc(alias = "notify"))] pub fn notify_one(&self) { + self.notify_with_strategy(NotifyOneStrategy::Fifo); + } + + /// Notifies the last waiting task. + /// + /// This function behaves similar to `notify_one`. The only difference is that it wakes + /// the most recently added waiter instead of the oldest waiter. + /// + /// Check the [`notify_one()`] documentation for more info and + /// examples. + /// + /// [`notify_one()`]: Notify::notify_one + pub fn notify_last(&self) { + self.notify_with_strategy(NotifyOneStrategy::Lifo); + } + + fn notify_with_strategy(&self, strategy: NotifyOneStrategy) { // Load the current state let mut curr = self.state.load(SeqCst); @@ -585,7 +621,7 @@ impl Notify { // transition out of WAITING while the lock is held. curr = self.state.load(SeqCst); - if let Some(waker) = notify_locked(&mut waiters, &self.state, curr) { + if let Some(waker) = notify_locked(&mut waiters, &self.state, curr, strategy) { drop(waiters); waker.wake(); } @@ -708,7 +744,12 @@ impl Default for Notify { impl UnwindSafe for Notify {} impl RefUnwindSafe for Notify {} -fn notify_locked(waiters: &mut WaitList, state: &AtomicUsize, curr: usize) -> Option { +fn notify_locked( + waiters: &mut WaitList, + state: &AtomicUsize, + curr: usize, + strategy: NotifyOneStrategy, +) -> Option { match get_state(curr) { EMPTY | NOTIFIED => { let res = state.compare_exchange(curr, set_state(curr, NOTIFIED), SeqCst, SeqCst); @@ -728,8 +769,11 @@ fn notify_locked(waiters: &mut WaitList, state: &AtomicUsize, curr: usize) -> Op // concurrently change as holding the lock is required to // transition **out** of `WAITING`. // - // Get a pending waiter - let waiter = waiters.pop_back().unwrap(); + // Get a pending waiter using one of the available dequeue strategies. + let waiter = match strategy { + NotifyOneStrategy::Fifo => waiters.pop_back().unwrap(), + NotifyOneStrategy::Lifo => waiters.pop_front().unwrap(), + }; // Safety: we never make mutable references to waiters. let waiter = unsafe { waiter.as_ref() }; @@ -738,7 +782,9 @@ fn notify_locked(waiters: &mut WaitList, state: &AtomicUsize, curr: usize) -> Op let waker = unsafe { waiter.waker.with_mut(|waker| (*waker).take()) }; // This waiter is unlinked and will not be shared ever again, release it. - waiter.notification.store_release(Notification::One); + waiter + .notification + .store_release(Notification::One(strategy)); if waiters.is_empty() { // As this the **final** waiter in the list, the state @@ -1137,8 +1183,10 @@ impl Drop for Notified<'_> { // See if the node was notified but not received. In this case, if // the notification was triggered via `notify_one`, it must be sent // to the next waiter. - if notification == Some(Notification::One) { - if let Some(waker) = notify_locked(&mut waiters, ¬ify.state, notify_state) { + if let Some(Notification::One(strategy)) = notification { + if let Some(waker) = + notify_locked(&mut waiters, ¬ify.state, notify_state, strategy) + { drop(waiters); waker.wake(); } diff --git a/tokio/src/util/linked_list.rs b/tokio/src/util/linked_list.rs index ab20292e21d..0274849b0c6 100644 --- a/tokio/src/util/linked_list.rs +++ b/tokio/src/util/linked_list.rs @@ -137,6 +137,26 @@ impl LinkedList { } } + /// Removes the first element from a list and returns it, or None if it is + /// empty. + pub(crate) fn pop_front(&mut self) -> Option { + unsafe { + let head = self.head?; + self.head = L::pointers(head).as_ref().get_next(); + + if let Some(new_head) = L::pointers(head).as_ref().get_next() { + L::pointers(new_head).as_mut().set_prev(None); + } else { + self.tail = None; + } + + L::pointers(head).as_mut().set_prev(None); + L::pointers(head).as_mut().set_next(None); + + Some(L::from_raw(head)) + } + } + /// Removes the last element from a list and returns it, or None if it is /// empty. pub(crate) fn pop_back(&mut self) -> Option { diff --git a/tokio/tests/sync_notify.rs b/tokio/tests/sync_notify.rs index 01b8ce86537..13b3f921e98 100644 --- a/tokio/tests/sync_notify.rs +++ b/tokio/tests/sync_notify.rs @@ -21,6 +21,38 @@ fn notify_notified_one() { assert_ready!(notified.poll()); } +#[test] +fn notify_multi_notified_one() { + let notify = Notify::new(); + let mut notified1 = spawn(async { notify.notified().await }); + let mut notified2 = spawn(async { notify.notified().await }); + + // add two waiters into the queue + assert_pending!(notified1.poll()); + assert_pending!(notified2.poll()); + + // should wakeup the first one + notify.notify_one(); + assert_ready!(notified1.poll()); + assert_pending!(notified2.poll()); +} + +#[test] +fn notify_multi_notified_last() { + let notify = Notify::new(); + let mut notified1 = spawn(async { notify.notified().await }); + let mut notified2 = spawn(async { notify.notified().await }); + + // add two waiters into the queue + assert_pending!(notified1.poll()); + assert_pending!(notified2.poll()); + + // should wakeup the last one + notify.notify_last(); + assert_pending!(notified1.poll()); + assert_ready!(notified2.poll()); +} + #[test] fn notified_one_notify() { let notify = Notify::new(); @@ -105,6 +137,49 @@ fn notified_multi_notify_drop_one() { assert_ready!(notified2.poll()); } +#[test] +fn notified_multi_notify_one_drop() { + let notify = Notify::new(); + let mut notified1 = spawn(async { notify.notified().await }); + let mut notified2 = spawn(async { notify.notified().await }); + let mut notified3 = spawn(async { notify.notified().await }); + + // add waiters by order of poll execution + assert_pending!(notified1.poll()); + assert_pending!(notified2.poll()); + assert_pending!(notified3.poll()); + + // by default fifo + notify.notify_one(); + + drop(notified1); + + // next waiter should be the one to be to woken up + assert_ready!(notified2.poll()); + assert_pending!(notified3.poll()); +} + +#[test] +fn notified_multi_notify_last_drop() { + let notify = Notify::new(); + let mut notified1 = spawn(async { notify.notified().await }); + let mut notified2 = spawn(async { notify.notified().await }); + let mut notified3 = spawn(async { notify.notified().await }); + + // add waiters by order of poll execution + assert_pending!(notified1.poll()); + assert_pending!(notified2.poll()); + assert_pending!(notified3.poll()); + + notify.notify_last(); + + drop(notified3); + + // latest waiter added should be the one to woken up + assert_ready!(notified2.poll()); + assert_pending!(notified1.poll()); +} + #[test] fn notify_in_drop_after_wake() { use futures::task::ArcWake; From 86658bd87dc470f8e36eb6b893cc403820cfb7ee Mon Sep 17 00:00:00 2001 From: Russell Cohen Date: Tue, 28 May 2024 15:55:20 -0400 Subject: [PATCH 026/119] metrics: stabilize `RuntimeMetrics::worker_count` (#6556) --- tokio/src/macros/cfg.rs | 4 +- tokio/src/runtime/blocking/pool.rs | 4 +- tokio/src/runtime/builder.rs | 2 +- tokio/src/runtime/coop.rs | 4 +- tokio/src/runtime/handle.rs | 16 +- tokio/src/runtime/io/metrics.rs | 2 +- tokio/src/runtime/metrics/histogram.rs | 2 +- tokio/src/runtime/metrics/io.rs | 3 +- tokio/src/runtime/metrics/mod.rs | 10 +- tokio/src/runtime/metrics/runtime.rs | 1309 +++++++++-------- tokio/src/runtime/metrics/worker.rs | 6 +- tokio/src/runtime/mod.rs | 15 +- tokio/src/runtime/runtime.rs | 16 +- .../runtime/scheduler/current_thread/mod.rs | 2 +- tokio/src/runtime/scheduler/inject.rs | 2 +- tokio/src/runtime/scheduler/mod.rs | 24 +- .../runtime/scheduler/multi_thread/handle.rs | 4 +- .../scheduler/multi_thread/handle/metrics.rs | 58 +- .../runtime/scheduler/multi_thread/queue.rs | 2 +- .../runtime/scheduler/multi_thread/worker.rs | 2 +- .../scheduler/multi_thread_alt/handle.rs | 2 +- .../scheduler/multi_thread_alt/queue.rs | 2 +- .../scheduler/multi_thread_alt/worker.rs | 2 +- tokio/src/runtime/tests/queue.rs | 8 +- 24 files changed, 749 insertions(+), 752 deletions(-) diff --git a/tokio/src/macros/cfg.rs b/tokio/src/macros/cfg.rs index f44599ff47a..8a72476f7c4 100644 --- a/tokio/src/macros/cfg.rs +++ b/tokio/src/macros/cfg.rs @@ -215,7 +215,7 @@ macro_rules! cfg_macros { } } -macro_rules! cfg_metrics { +macro_rules! cfg_unstable_metrics { ($($item:item)*) => { $( #[cfg(tokio_unstable)] @@ -245,7 +245,7 @@ macro_rules! cfg_no_64bit_metrics { } } -macro_rules! cfg_not_metrics { +macro_rules! cfg_not_unstable_metrics { ($($item:item)*) => { $( #[cfg(not(tokio_unstable))] diff --git a/tokio/src/runtime/blocking/pool.rs b/tokio/src/runtime/blocking/pool.rs index c74aea76568..3757079f329 100644 --- a/tokio/src/runtime/blocking/pool.rs +++ b/tokio/src/runtime/blocking/pool.rs @@ -40,7 +40,7 @@ impl SpawnerMetrics { self.num_idle_threads.load(Ordering::Relaxed) } - cfg_metrics! { + cfg_unstable_metrics! { fn queue_depth(&self) -> usize { self.queue_depth.load(Ordering::Relaxed) } @@ -474,7 +474,7 @@ impl Spawner { } } -cfg_metrics! { +cfg_unstable_metrics! { impl Spawner { pub(crate) fn num_threads(&self) -> usize { self.inner.metrics.num_threads() diff --git a/tokio/src/runtime/builder.rs b/tokio/src/runtime/builder.rs index 05f736d3e50..519c7d01413 100644 --- a/tokio/src/runtime/builder.rs +++ b/tokio/src/runtime/builder.rs @@ -957,7 +957,7 @@ impl Builder { } } - cfg_metrics! { + cfg_unstable_metrics! { /// Enables tracking the distribution of task poll times. /// /// Task poll times are not instrumented by default as doing so requires diff --git a/tokio/src/runtime/coop.rs b/tokio/src/runtime/coop.rs index d9f7ff2af29..f2afa75c9c4 100644 --- a/tokio/src/runtime/coop.rs +++ b/tokio/src/runtime/coop.rs @@ -197,7 +197,7 @@ cfg_coop! { } cfg_rt! { - cfg_metrics! { + cfg_unstable_metrics! { #[inline(always)] fn inc_budget_forced_yield_count() { let _ = context::with_current(|handle| { @@ -206,7 +206,7 @@ cfg_coop! { } } - cfg_not_metrics! { + cfg_not_unstable_metrics! { #[inline(always)] fn inc_budget_forced_yield_count() {} } diff --git a/tokio/src/runtime/handle.rs b/tokio/src/runtime/handle.rs index 01d210cd36f..5691a6e3bd2 100644 --- a/tokio/src/runtime/handle.rs +++ b/tokio/src/runtime/handle.rs @@ -1,6 +1,6 @@ #[cfg(tokio_unstable)] use crate::runtime; -use crate::runtime::{context, scheduler, RuntimeFlavor}; +use crate::runtime::{context, scheduler, RuntimeFlavor, RuntimeMetrics}; /// Handle to the runtime. /// @@ -393,17 +393,11 @@ impl Handle { owned_id.into() } } -} - -cfg_metrics! { - use crate::runtime::RuntimeMetrics; - impl Handle { - /// Returns a view that lets you get information about how the runtime - /// is performing. - pub fn metrics(&self) -> RuntimeMetrics { - RuntimeMetrics::new(self.clone()) - } + /// Returns a view that lets you get information about how the runtime + /// is performing. + pub fn metrics(&self) -> RuntimeMetrics { + RuntimeMetrics::new(self.clone()) } } diff --git a/tokio/src/runtime/io/metrics.rs b/tokio/src/runtime/io/metrics.rs index ec341efe680..e7a01bc2f46 100644 --- a/tokio/src/runtime/io/metrics.rs +++ b/tokio/src/runtime/io/metrics.rs @@ -17,7 +17,7 @@ cfg_not_rt_and_metrics_and_net! { cfg_net! { cfg_rt! { - cfg_metrics! { + cfg_unstable_metrics! { pub(crate) use crate::runtime::IoDriverMetrics; } } diff --git a/tokio/src/runtime/metrics/histogram.rs b/tokio/src/runtime/metrics/histogram.rs index f75ffa3b495..4cfd769a94e 100644 --- a/tokio/src/runtime/metrics/histogram.rs +++ b/tokio/src/runtime/metrics/histogram.rs @@ -1,5 +1,5 @@ -use crate::loom::sync::atomic::Ordering::Relaxed; use crate::util::metric_atomics::MetricAtomicU64; +use std::sync::atomic::Ordering::Relaxed; use std::cmp; use std::ops::Range; diff --git a/tokio/src/runtime/metrics/io.rs b/tokio/src/runtime/metrics/io.rs index 674fca5faec..9fdf3c96694 100644 --- a/tokio/src/runtime/metrics/io.rs +++ b/tokio/src/runtime/metrics/io.rs @@ -1,6 +1,7 @@ #![cfg_attr(not(feature = "net"), allow(dead_code))] -use crate::{loom::sync::atomic::Ordering::Relaxed, util::metric_atomics::MetricAtomicU64}; +use crate::util::metric_atomics::MetricAtomicU64; +use std::sync::atomic::Ordering::Relaxed; #[derive(Default)] pub(crate) struct IoDriverMetrics { diff --git a/tokio/src/runtime/metrics/mod.rs b/tokio/src/runtime/metrics/mod.rs index 88be4a5211f..295c97cce88 100644 --- a/tokio/src/runtime/metrics/mod.rs +++ b/tokio/src/runtime/metrics/mod.rs @@ -8,7 +8,10 @@ //! [unstable]: crate#unstable-features #![allow(clippy::module_inception)] -cfg_metrics! { +mod runtime; +pub use runtime::RuntimeMetrics; + +cfg_unstable_metrics! { mod batch; pub(crate) use batch::MetricsBatch; @@ -17,9 +20,6 @@ cfg_metrics! { #[allow(unreachable_pub)] // rust-lang/rust#57411 pub use histogram::HistogramScale; - mod runtime; - #[allow(unreachable_pub)] // rust-lang/rust#57411 - pub use runtime::RuntimeMetrics; mod scheduler; pub(crate) use scheduler::SchedulerMetrics; @@ -33,7 +33,7 @@ cfg_metrics! { } } -cfg_not_metrics! { +cfg_not_unstable_metrics! { mod mock; pub(crate) use mock::{SchedulerMetrics, WorkerMetrics, MetricsBatch, HistogramBuilder}; diff --git a/tokio/src/runtime/metrics/runtime.rs b/tokio/src/runtime/metrics/runtime.rs index 865a6406a6a..8d30f66f6ff 100644 --- a/tokio/src/runtime/metrics/runtime.rs +++ b/tokio/src/runtime/metrics/runtime.rs @@ -1,10 +1,12 @@ use crate::runtime::Handle; -use std::ops::Range; -cfg_64bit_metrics! { - use std::sync::atomic::Ordering::Relaxed; +cfg_unstable_metrics! { + use std::ops::Range; + cfg_64bit_metrics! { + use std::sync::atomic::Ordering::Relaxed; + } + use std::time::Duration; } -use std::time::Duration; /// Handle to the runtime's metrics. /// @@ -45,221 +47,354 @@ impl RuntimeMetrics { self.handle.inner.num_workers() } - /// Returns the number of additional threads spawned by the runtime. - /// - /// The number of workers is set by configuring `max_blocking_threads` on - /// `runtime::Builder`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let _ = tokio::task::spawn_blocking(move || { - /// // Stand-in for compute-heavy work or using synchronous APIs - /// 1 + 1 - /// }).await; - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.num_blocking_threads(); - /// println!("Runtime has created {} threads", n); - /// } - /// ``` - pub fn num_blocking_threads(&self) -> usize { - self.handle.inner.num_blocking_threads() - } + cfg_unstable_metrics! { - /// Returns the number of active tasks in the runtime. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.active_tasks_count(); - /// println!("Runtime has {} active tasks", n); - /// } - /// ``` - pub fn active_tasks_count(&self) -> usize { - self.handle.inner.active_tasks_count() - } + /// Returns the number of additional threads spawned by the runtime. + /// + /// The number of workers is set by configuring `max_blocking_threads` on + /// `runtime::Builder`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let _ = tokio::task::spawn_blocking(move || { + /// // Stand-in for compute-heavy work or using synchronous APIs + /// 1 + 1 + /// }).await; + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.num_blocking_threads(); + /// println!("Runtime has created {} threads", n); + /// } + /// ``` + pub fn num_blocking_threads(&self) -> usize { + self.handle.inner.num_blocking_threads() + } - /// Returns the number of idle threads, which have spawned by the runtime - /// for `spawn_blocking` calls. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let _ = tokio::task::spawn_blocking(move || { - /// // Stand-in for compute-heavy work or using synchronous APIs - /// 1 + 1 - /// }).await; - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.num_idle_blocking_threads(); - /// println!("Runtime has {} idle blocking thread pool threads", n); - /// } - /// ``` - pub fn num_idle_blocking_threads(&self) -> usize { - self.handle.inner.num_idle_blocking_threads() - } + /// Returns the number of active tasks in the runtime. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.active_tasks_count(); + /// println!("Runtime has {} active tasks", n); + /// } + /// ``` + pub fn active_tasks_count(&self) -> usize { + self.handle.inner.active_tasks_count() + } - cfg_64bit_metrics! { - /// Returns the number of tasks scheduled from **outside** of the runtime. - /// - /// The remote schedule count starts at zero when the runtime is created and - /// increases by one each time a task is woken from **outside** of the - /// runtime. This usually means that a task is spawned or notified from a - /// non-runtime thread and must be queued using the Runtime's injection - /// queue, which tends to be slower. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.remote_schedule_count(); - /// println!("{} tasks were scheduled from outside the runtime", n); - /// } - /// ``` - pub fn remote_schedule_count(&self) -> u64 { - self.handle - .inner - .scheduler_metrics() - .remote_schedule_count - .load(Relaxed) - } + /// Returns the number of idle threads, which have spawned by the runtime + /// for `spawn_blocking` calls. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let _ = tokio::task::spawn_blocking(move || { + /// // Stand-in for compute-heavy work or using synchronous APIs + /// 1 + 1 + /// }).await; + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.num_idle_blocking_threads(); + /// println!("Runtime has {} idle blocking thread pool threads", n); + /// } + /// ``` + pub fn num_idle_blocking_threads(&self) -> usize { + self.handle.inner.num_idle_blocking_threads() + } - /// Returns the number of times that tasks have been forced to yield back to the scheduler - /// after exhausting their task budgets. - /// - /// This count starts at zero when the runtime is created and increases by one each time a task yields due to exhausting its budget. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - pub fn budget_forced_yield_count(&self) -> u64 { - self.handle - .inner - .scheduler_metrics() - .budget_forced_yield_count - .load(Relaxed) - } + cfg_64bit_metrics! { + /// Returns the number of tasks scheduled from **outside** of the runtime. + /// + /// The remote schedule count starts at zero when the runtime is created and + /// increases by one each time a task is woken from **outside** of the + /// runtime. This usually means that a task is spawned or notified from a + /// non-runtime thread and must be queued using the Runtime's injection + /// queue, which tends to be slower. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.remote_schedule_count(); + /// println!("{} tasks were scheduled from outside the runtime", n); + /// } + /// ``` + pub fn remote_schedule_count(&self) -> u64 { + self.handle + .inner + .scheduler_metrics() + .remote_schedule_count + .load(Relaxed) + } - /// Returns the total number of times the given worker thread has parked. - /// - /// The worker park count starts at zero when the runtime is created and - /// increases by one each time the worker parks the thread waiting for new - /// inbound events to process. This usually means the worker has processed - /// all pending work and is currently idle. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_park_count(0); - /// println!("worker 0 parked {} times", n); - /// } - /// ``` - pub fn worker_park_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .park_count - .load(Relaxed) - } + /// Returns the number of times that tasks have been forced to yield back to the scheduler + /// after exhausting their task budgets. + /// + /// This count starts at zero when the runtime is created and increases by one each time a task yields due to exhausting its budget. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + pub fn budget_forced_yield_count(&self) -> u64 { + self.handle + .inner + .scheduler_metrics() + .budget_forced_yield_count + .load(Relaxed) + } - /// Returns the number of times the given worker thread unparked but - /// performed no work before parking again. - /// - /// The worker no-op count starts at zero when the runtime is created and - /// increases by one each time the worker unparks the thread but finds no - /// new work and goes back to sleep. This indicates a false-positive wake up. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_noop_count(0); - /// println!("worker 0 had {} no-op unparks", n); - /// } - /// ``` - pub fn worker_noop_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .noop_count - .load(Relaxed) - } + /// Returns the total number of times the given worker thread has parked. + /// + /// The worker park count starts at zero when the runtime is created and + /// increases by one each time the worker parks the thread waiting for new + /// inbound events to process. This usually means the worker has processed + /// all pending work and is currently idle. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_park_count(0); + /// println!("worker 0 parked {} times", n); + /// } + /// ``` + pub fn worker_park_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .park_count + .load(Relaxed) + } - /// Returns the number of tasks the given worker thread stole from - /// another worker thread. - /// - /// This metric only applies to the **multi-threaded** runtime and will - /// always return `0` when using the current thread runtime. + /// Returns the number of times the given worker thread unparked but + /// performed no work before parking again. + /// + /// The worker no-op count starts at zero when the runtime is created and + /// increases by one each time the worker unparks the thread but finds no + /// new work and goes back to sleep. This indicates a false-positive wake up. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_noop_count(0); + /// println!("worker 0 had {} no-op unparks", n); + /// } + /// ``` + pub fn worker_noop_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .noop_count + .load(Relaxed) + } + + /// Returns the number of tasks the given worker thread stole from + /// another worker thread. + /// + /// This metric only applies to the **multi-threaded** runtime and will + /// always return `0` when using the current thread runtime. + /// + /// The worker steal count starts at zero when the runtime is created and + /// increases by `N` each time the worker has processed its scheduled queue + /// and successfully steals `N` more pending tasks from another worker. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_steal_count(0); + /// println!("worker 0 has stolen {} tasks", n); + /// } + /// ``` + pub fn worker_steal_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .steal_count + .load(Relaxed) + } + + /// Returns the number of times the given worker thread stole tasks from + /// another worker thread. + /// + /// This metric only applies to the **multi-threaded** runtime and will + /// always return `0` when using the current thread runtime. + /// + /// The worker steal count starts at zero when the runtime is created and + /// increases by one each time the worker has processed its scheduled queue + /// and successfully steals more pending tasks from another worker. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_steal_operations(0); + /// println!("worker 0 has stolen tasks {} times", n); + /// } + /// ``` + pub fn worker_steal_operations(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .steal_operations + .load(Relaxed) + } + + /// Returns the number of tasks the given worker thread has polled. + /// + /// The worker poll count starts at zero when the runtime is created and + /// increases by one each time the worker polls a scheduled task. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_poll_count(0); + /// println!("worker 0 has polled {} tasks", n); + /// } + /// ``` + pub fn worker_poll_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .poll_count + .load(Relaxed) + } + + /// Returns the amount of time the given worker thread has been busy. /// - /// The worker steal count starts at zero when the runtime is created and - /// increases by `N` each time the worker has processed its scheduled queue - /// and successfully steals `N` more pending tasks from another worker. + /// The worker busy duration starts at zero when the runtime is created and + /// increases whenever the worker is spending time processing work. Using + /// this value can indicate the load of the given worker. If a lot of time + /// is spent busy, then the worker is under load and will check for inbound + /// events less often. /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. + /// The timer is monotonically increasing. It is never decremented or reset + /// to zero. /// /// # Arguments /// @@ -282,27 +417,28 @@ impl RuntimeMetrics { /// async fn main() { /// let metrics = Handle::current().metrics(); /// - /// let n = metrics.worker_steal_count(0); - /// println!("worker 0 has stolen {} tasks", n); + /// let n = metrics.worker_total_busy_duration(0); + /// println!("worker 0 was busy for a total of {:?}", n); /// } /// ``` - pub fn worker_steal_count(&self, worker: usize) -> u64 { - self.handle + pub fn worker_total_busy_duration(&self, worker: usize) -> Duration { + let nanos = self + .handle .inner .worker_metrics(worker) - .steal_count - .load(Relaxed) + .busy_duration_total + .load(Relaxed); + Duration::from_nanos(nanos) } - /// Returns the number of times the given worker thread stole tasks from - /// another worker thread. + /// Returns the number of tasks scheduled from **within** the runtime on the + /// given worker's local queue. /// - /// This metric only applies to the **multi-threaded** runtime and will - /// always return `0` when using the current thread runtime. - /// - /// The worker steal count starts at zero when the runtime is created and - /// increases by one each time the worker has processed its scheduled queue - /// and successfully steals more pending tasks from another worker. + /// The local schedule count starts at zero when the runtime is created and + /// increases by one each time a task is woken from **inside** of the + /// runtime on the given worker. This usually means that a task is spawned + /// or notified from within a runtime thread and will be queued on the + /// worker-local queue. /// /// The counter is monotonically increasing. It is never decremented or /// reset to zero. @@ -328,22 +464,27 @@ impl RuntimeMetrics { /// async fn main() { /// let metrics = Handle::current().metrics(); /// - /// let n = metrics.worker_steal_operations(0); - /// println!("worker 0 has stolen tasks {} times", n); + /// let n = metrics.worker_local_schedule_count(0); + /// println!("{} tasks were scheduled on the worker's local queue", n); /// } /// ``` - pub fn worker_steal_operations(&self, worker: usize) -> u64 { + pub fn worker_local_schedule_count(&self, worker: usize) -> u64 { self.handle .inner .worker_metrics(worker) - .steal_operations + .local_schedule_count .load(Relaxed) } - /// Returns the number of tasks the given worker thread has polled. + /// Returns the number of times the given worker thread saturated its local + /// queue. + /// + /// This metric only applies to the **multi-threaded** scheduler. /// - /// The worker poll count starts at zero when the runtime is created and - /// increases by one each time the worker polls a scheduled task. + /// The worker overflow count starts at zero when the runtime is created and + /// increases by one each time the worker attempts to schedule a task + /// locally, but its local queue is full. When this happens, half of the + /// local queue is moved to the injection queue. /// /// The counter is monotonically increasing. It is never decremented or /// reset to zero. @@ -369,40 +510,27 @@ impl RuntimeMetrics { /// async fn main() { /// let metrics = Handle::current().metrics(); /// - /// let n = metrics.worker_poll_count(0); - /// println!("worker 0 has polled {} tasks", n); + /// let n = metrics.worker_overflow_count(0); + /// println!("worker 0 has overflowed its queue {} times", n); /// } /// ``` - pub fn worker_poll_count(&self, worker: usize) -> u64 { + pub fn worker_overflow_count(&self, worker: usize) -> u64 { self.handle .inner .worker_metrics(worker) - .poll_count + .overflow_count .load(Relaxed) } + } - /// Returns the amount of time the given worker thread has been busy. - /// - /// The worker busy duration starts at zero when the runtime is created and - /// increases whenever the worker is spending time processing work. Using - /// this value can indicate the load of the given worker. If a lot of time - /// is spent busy, then the worker is under load and will check for inbound - /// events less often. - /// - /// The timer is monotonically increasing. It is never decremented or reset - /// to zero. + /// Returns the number of tasks currently scheduled in the runtime's + /// injection queue. /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. + /// Tasks that are spawned or notified from a non-runtime thread are + /// scheduled using the runtime's injection queue. This metric returns the + /// **current** number of tasks pending in the injection queue. As such, the + /// returned value may increase or decrease as new tasks are scheduled and + /// processed. /// /// # Examples /// @@ -413,31 +541,22 @@ impl RuntimeMetrics { /// async fn main() { /// let metrics = Handle::current().metrics(); /// - /// let n = metrics.worker_total_busy_duration(0); - /// println!("worker 0 was busy for a total of {:?}", n); + /// let n = metrics.injection_queue_depth(); + /// println!("{} tasks currently pending in the runtime's injection queue", n); /// } /// ``` - pub fn worker_total_busy_duration(&self, worker: usize) -> Duration { - let nanos = self - .handle - .inner - .worker_metrics(worker) - .busy_duration_total - .load(Relaxed); - Duration::from_nanos(nanos) + pub fn injection_queue_depth(&self) -> usize { + self.handle.inner.injection_queue_depth() } - /// Returns the number of tasks scheduled from **within** the runtime on the - /// given worker's local queue. - /// - /// The local schedule count starts at zero when the runtime is created and - /// increases by one each time a task is woken from **inside** of the - /// runtime on the given worker. This usually means that a task is spawned - /// or notified from within a runtime thread and will be queued on the - /// worker-local queue. + /// Returns the number of tasks currently scheduled in the given worker's + /// local queue. /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. + /// Tasks that are spawned or notified from within a runtime thread are + /// scheduled using that worker's local queue. This metric returns the + /// **current** number of tasks pending in the worker's local queue. As + /// such, the returned value may increase or decrease as new tasks are + /// scheduled and processed. /// /// # Arguments /// @@ -460,283 +579,56 @@ impl RuntimeMetrics { /// async fn main() { /// let metrics = Handle::current().metrics(); /// - /// let n = metrics.worker_local_schedule_count(0); - /// println!("{} tasks were scheduled on the worker's local queue", n); + /// let n = metrics.worker_local_queue_depth(0); + /// println!("{} tasks currently pending in worker 0's local queue", n); /// } /// ``` - pub fn worker_local_schedule_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .local_schedule_count - .load(Relaxed) + pub fn worker_local_queue_depth(&self, worker: usize) -> usize { + self.handle.inner.worker_local_queue_depth(worker) } - /// Returns the number of times the given worker thread saturated its local - /// queue. - /// - /// This metric only applies to the **multi-threaded** scheduler. - /// - /// The worker overflow count starts at zero when the runtime is created and - /// increases by one each time the worker attempts to schedule a task - /// locally, but its local queue is full. When this happens, half of the - /// local queue is moved to the injection queue. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. + /// Returns `true` if the runtime is tracking the distribution of task poll + /// times. /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. + /// Task poll times are not instrumented by default as doing so requires + /// calling [`Instant::now()`] twice per task poll. The feature is enabled + /// by calling [`enable_metrics_poll_count_histogram()`] when building the + /// runtime. /// /// # Examples /// /// ``` - /// use tokio::runtime::Handle; + /// use tokio::runtime::{self, Handle}; /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); + /// fn main() { + /// runtime::Builder::new_current_thread() + /// .enable_metrics_poll_count_histogram() + /// .build() + /// .unwrap() + /// .block_on(async { + /// let metrics = Handle::current().metrics(); + /// let enabled = metrics.poll_count_histogram_enabled(); /// - /// let n = metrics.worker_overflow_count(0); - /// println!("worker 0 has overflowed its queue {} times", n); + /// println!("Tracking task poll time distribution: {:?}", enabled); + /// }); /// } /// ``` - pub fn worker_overflow_count(&self, worker: usize) -> u64 { + /// + /// [`enable_metrics_poll_count_histogram()`]: crate::runtime::Builder::enable_metrics_poll_count_histogram + /// [`Instant::now()`]: std::time::Instant::now + pub fn poll_count_histogram_enabled(&self) -> bool { self.handle .inner - .worker_metrics(worker) - .overflow_count - .load(Relaxed) + .worker_metrics(0) + .poll_count_histogram + .is_some() } - } - /// Returns the number of tasks currently scheduled in the runtime's - /// injection queue. - /// - /// Tasks that are spawned or notified from a non-runtime thread are - /// scheduled using the runtime's injection queue. This metric returns the - /// **current** number of tasks pending in the injection queue. As such, the - /// returned value may increase or decrease as new tasks are scheduled and - /// processed. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.injection_queue_depth(); - /// println!("{} tasks currently pending in the runtime's injection queue", n); - /// } - /// ``` - pub fn injection_queue_depth(&self) -> usize { - self.handle.inner.injection_queue_depth() - } - - /// Returns the number of tasks currently scheduled in the given worker's - /// local queue. - /// - /// Tasks that are spawned or notified from within a runtime thread are - /// scheduled using that worker's local queue. This metric returns the - /// **current** number of tasks pending in the worker's local queue. As - /// such, the returned value may increase or decrease as new tasks are - /// scheduled and processed. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_local_queue_depth(0); - /// println!("{} tasks currently pending in worker 0's local queue", n); - /// } - /// ``` - pub fn worker_local_queue_depth(&self, worker: usize) -> usize { - self.handle.inner.worker_local_queue_depth(worker) - } - - /// Returns `true` if the runtime is tracking the distribution of task poll - /// times. - /// - /// Task poll times are not instrumented by default as doing so requires - /// calling [`Instant::now()`] twice per task poll. The feature is enabled - /// by calling [`enable_metrics_poll_count_histogram()`] when building the - /// runtime. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::{self, Handle}; - /// - /// fn main() { - /// runtime::Builder::new_current_thread() - /// .enable_metrics_poll_count_histogram() - /// .build() - /// .unwrap() - /// .block_on(async { - /// let metrics = Handle::current().metrics(); - /// let enabled = metrics.poll_count_histogram_enabled(); - /// - /// println!("Tracking task poll time distribution: {:?}", enabled); - /// }); - /// } - /// ``` - /// - /// [`enable_metrics_poll_count_histogram()`]: crate::runtime::Builder::enable_metrics_poll_count_histogram - /// [`Instant::now()`]: std::time::Instant::now - pub fn poll_count_histogram_enabled(&self) -> bool { - self.handle - .inner - .worker_metrics(0) - .poll_count_histogram - .is_some() - } - - /// Returns the number of histogram buckets tracking the distribution of - /// task poll times. - /// - /// This value is configured by calling - /// [`metrics_poll_count_histogram_buckets()`] when building the runtime. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::{self, Handle}; - /// - /// fn main() { - /// runtime::Builder::new_current_thread() - /// .enable_metrics_poll_count_histogram() - /// .build() - /// .unwrap() - /// .block_on(async { - /// let metrics = Handle::current().metrics(); - /// let buckets = metrics.poll_count_histogram_num_buckets(); - /// - /// println!("Histogram buckets: {:?}", buckets); - /// }); - /// } - /// ``` - /// - /// [`metrics_poll_count_histogram_buckets()`]: - /// crate::runtime::Builder::metrics_poll_count_histogram_buckets - pub fn poll_count_histogram_num_buckets(&self) -> usize { - self.handle - .inner - .worker_metrics(0) - .poll_count_histogram - .as_ref() - .map(|histogram| histogram.num_buckets()) - .unwrap_or_default() - } - - /// Returns the range of task poll times tracked by the given bucket. - /// - /// This value is configured by calling - /// [`metrics_poll_count_histogram_resolution()`] when building the runtime. - /// - /// # Panics - /// - /// The method panics if `bucket` represents an invalid bucket index, i.e. - /// is greater than or equal to `poll_count_histogram_num_buckets()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::{self, Handle}; - /// - /// fn main() { - /// runtime::Builder::new_current_thread() - /// .enable_metrics_poll_count_histogram() - /// .build() - /// .unwrap() - /// .block_on(async { - /// let metrics = Handle::current().metrics(); - /// let buckets = metrics.poll_count_histogram_num_buckets(); - /// - /// for i in 0..buckets { - /// let range = metrics.poll_count_histogram_bucket_range(i); - /// println!("Histogram bucket {} range: {:?}", i, range); - /// } - /// }); - /// } - /// ``` - /// - /// [`metrics_poll_count_histogram_resolution()`]: - /// crate::runtime::Builder::metrics_poll_count_histogram_resolution - #[track_caller] - pub fn poll_count_histogram_bucket_range(&self, bucket: usize) -> Range { - self.handle - .inner - .worker_metrics(0) - .poll_count_histogram - .as_ref() - .map(|histogram| { - let range = histogram.bucket_range(bucket); - std::ops::Range { - start: Duration::from_nanos(range.start), - end: Duration::from_nanos(range.end), - } - }) - .unwrap_or_default() - } - - cfg_64bit_metrics! { - /// Returns the number of times the given worker polled tasks with a poll - /// duration within the given bucket's range. - /// - /// Each worker maintains its own histogram and the counts for each bucket - /// starts at zero when the runtime is created. Each time the worker polls a - /// task, it tracks the duration the task poll time took and increments the - /// associated bucket by 1. - /// - /// Each bucket is a monotonically increasing counter. It is never - /// decremented or reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// `bucket` is the index of the bucket being queried. The bucket is scoped - /// to the worker. The range represented by the bucket can be queried by - /// calling [`poll_count_histogram_bucket_range()`]. Each worker maintains - /// identical bucket ranges. + /// Returns the number of histogram buckets tracking the distribution of + /// task poll times. /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()` or if `bucket` represents an - /// invalid bucket. + /// This value is configured by calling + /// [`metrics_poll_count_histogram_buckets()`] when building the runtime. /// /// # Examples /// @@ -752,149 +644,156 @@ impl RuntimeMetrics { /// let metrics = Handle::current().metrics(); /// let buckets = metrics.poll_count_histogram_num_buckets(); /// - /// for worker in 0..metrics.num_workers() { - /// for i in 0..buckets { - /// let count = metrics.poll_count_histogram_bucket_count(worker, i); - /// println!("Poll count {}", count); - /// } - /// } + /// println!("Histogram buckets: {:?}", buckets); /// }); /// } /// ``` /// - /// [`poll_count_histogram_bucket_range()`]: crate::runtime::RuntimeMetrics::poll_count_histogram_bucket_range - #[track_caller] - pub fn poll_count_histogram_bucket_count(&self, worker: usize, bucket: usize) -> u64 { + /// [`metrics_poll_count_histogram_buckets()`]: + /// crate::runtime::Builder::metrics_poll_count_histogram_buckets + pub fn poll_count_histogram_num_buckets(&self) -> usize { self.handle .inner - .worker_metrics(worker) + .worker_metrics(0) .poll_count_histogram .as_ref() - .map(|histogram| histogram.get(bucket)) + .map(|histogram| histogram.num_buckets()) .unwrap_or_default() } - /// Returns the mean duration of task polls, in nanoseconds. + /// Returns the range of task poll times tracked by the given bucket. /// - /// This is an exponentially weighted moving average. Currently, this metric - /// is only provided by the multi-threaded runtime. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. + /// This value is configured by calling + /// [`metrics_poll_count_histogram_resolution()`] when building the runtime. /// /// # Panics /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. + /// The method panics if `bucket` represents an invalid bucket index, i.e. + /// is greater than or equal to `poll_count_histogram_num_buckets()`. /// /// # Examples /// /// ``` - /// use tokio::runtime::Handle; + /// use tokio::runtime::{self, Handle}; /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); + /// fn main() { + /// runtime::Builder::new_current_thread() + /// .enable_metrics_poll_count_histogram() + /// .build() + /// .unwrap() + /// .block_on(async { + /// let metrics = Handle::current().metrics(); + /// let buckets = metrics.poll_count_histogram_num_buckets(); /// - /// let n = metrics.worker_mean_poll_time(0); - /// println!("worker 0 has a mean poll time of {:?}", n); + /// for i in 0..buckets { + /// let range = metrics.poll_count_histogram_bucket_range(i); + /// println!("Histogram bucket {} range: {:?}", i, range); + /// } + /// }); /// } /// ``` + /// + /// [`metrics_poll_count_histogram_resolution()`]: + /// crate::runtime::Builder::metrics_poll_count_histogram_resolution #[track_caller] - pub fn worker_mean_poll_time(&self, worker: usize) -> Duration { - let nanos = self - .handle + pub fn poll_count_histogram_bucket_range(&self, bucket: usize) -> Range { + self.handle .inner - .worker_metrics(worker) - .mean_poll_time - .load(Relaxed); - Duration::from_nanos(nanos) + .worker_metrics(0) + .poll_count_histogram + .as_ref() + .map(|histogram| { + let range = histogram.bucket_range(bucket); + std::ops::Range { + start: Duration::from_nanos(range.start), + end: Duration::from_nanos(range.end), + } + }) + .unwrap_or_default() } - } - - /// Returns the number of tasks currently scheduled in the blocking - /// thread pool, spawned using `spawn_blocking`. - /// - /// This metric returns the **current** number of tasks pending in - /// blocking thread pool. As such, the returned value may increase - /// or decrease as new tasks are scheduled and processed. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.blocking_queue_depth(); - /// println!("{} tasks currently pending in the blocking thread pool", n); - /// } - /// ``` - pub fn blocking_queue_depth(&self) -> usize { - self.handle.inner.blocking_queue_depth() - } -} -cfg_net! { - impl RuntimeMetrics { cfg_64bit_metrics! { - /// Returns the number of file descriptors that have been registered with the - /// runtime's I/O driver. + /// Returns the number of times the given worker polled tasks with a poll + /// duration within the given bucket's range. /// - /// # Examples + /// Each worker maintains its own histogram and the counts for each bucket + /// starts at zero when the runtime is created. Each time the worker polls a + /// task, it tracks the duration the task poll time took and increments the + /// associated bucket by 1. /// - /// ``` - /// use tokio::runtime::Handle; + /// Each bucket is a monotonically increasing counter. It is never + /// decremented or reset to zero. /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); + /// # Arguments /// - /// let registered_fds = metrics.io_driver_fd_registered_count(); - /// println!("{} fds have been registered with the runtime's I/O driver.", registered_fds); + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. /// - /// let deregistered_fds = metrics.io_driver_fd_deregistered_count(); + /// `bucket` is the index of the bucket being queried. The bucket is scoped + /// to the worker. The range represented by the bucket can be queried by + /// calling [`poll_count_histogram_bucket_range()`]. Each worker maintains + /// identical bucket ranges. /// - /// let current_fd_count = registered_fds - deregistered_fds; - /// println!("{} fds are currently registered by the runtime's I/O driver.", current_fd_count); - /// } - /// ``` - pub fn io_driver_fd_registered_count(&self) -> u64 { - self.with_io_driver_metrics(|m| { - m.fd_registered_count.load(Relaxed) - }) - } - - /// Returns the number of file descriptors that have been deregistered by the - /// runtime's I/O driver. + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()` or if `bucket` represents an + /// invalid bucket. /// /// # Examples /// /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.io_driver_fd_deregistered_count(); - /// println!("{} fds have been deregistered by the runtime's I/O driver.", n); + /// use tokio::runtime::{self, Handle}; + /// + /// fn main() { + /// runtime::Builder::new_current_thread() + /// .enable_metrics_poll_count_histogram() + /// .build() + /// .unwrap() + /// .block_on(async { + /// let metrics = Handle::current().metrics(); + /// let buckets = metrics.poll_count_histogram_num_buckets(); + /// + /// for worker in 0..metrics.num_workers() { + /// for i in 0..buckets { + /// let count = metrics.poll_count_histogram_bucket_count(worker, i); + /// println!("Poll count {}", count); + /// } + /// } + /// }); /// } /// ``` - pub fn io_driver_fd_deregistered_count(&self) -> u64 { - self.with_io_driver_metrics(|m| { - m.fd_deregistered_count.load(Relaxed) - }) + /// + /// [`poll_count_histogram_bucket_range()`]: crate::runtime::RuntimeMetrics::poll_count_histogram_bucket_range + #[track_caller] + pub fn poll_count_histogram_bucket_count(&self, worker: usize, bucket: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .poll_count_histogram + .as_ref() + .map(|histogram| histogram.get(bucket)) + .unwrap_or_default() } - /// Returns the number of ready events processed by the runtime's - /// I/O driver. + /// Returns the mean duration of task polls, in nanoseconds. + /// + /// This is an exponentially weighted moving average. Currently, this metric + /// is only provided by the multi-threaded runtime. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. /// /// # Examples /// @@ -905,27 +804,131 @@ cfg_net! { /// async fn main() { /// let metrics = Handle::current().metrics(); /// - /// let n = metrics.io_driver_ready_count(); - /// println!("{} ready events processed by the runtime's I/O driver.", n); + /// let n = metrics.worker_mean_poll_time(0); + /// println!("worker 0 has a mean poll time of {:?}", n); /// } /// ``` - pub fn io_driver_ready_count(&self) -> u64 { - self.with_io_driver_metrics(|m| m.ready_count.load(Relaxed)) + #[track_caller] + pub fn worker_mean_poll_time(&self, worker: usize) -> Duration { + let nanos = self + .handle + .inner + .worker_metrics(worker) + .mean_poll_time + .load(Relaxed); + Duration::from_nanos(nanos) } + } - fn with_io_driver_metrics(&self, f: F) -> u64 - where - F: Fn(&super::IoDriverMetrics) -> u64, - { - // TODO: Investigate if this should return 0, most of our metrics always increase - // thus this breaks that guarantee. - self.handle - .inner - .driver() - .io - .as_ref() - .map(|h| f(&h.metrics)) - .unwrap_or(0) + /// Returns the number of tasks currently scheduled in the blocking + /// thread pool, spawned using `spawn_blocking`. + /// + /// This metric returns the **current** number of tasks pending in + /// blocking thread pool. As such, the returned value may increase + /// or decrease as new tasks are scheduled and processed. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.blocking_queue_depth(); + /// println!("{} tasks currently pending in the blocking thread pool", n); + /// } + /// ``` + pub fn blocking_queue_depth(&self) -> usize { + self.handle.inner.blocking_queue_depth() + } + + cfg_net! { + cfg_64bit_metrics! { + /// Returns the number of file descriptors that have been registered with the + /// runtime's I/O driver. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let registered_fds = metrics.io_driver_fd_registered_count(); + /// println!("{} fds have been registered with the runtime's I/O driver.", registered_fds); + /// + /// let deregistered_fds = metrics.io_driver_fd_deregistered_count(); + /// + /// let current_fd_count = registered_fds - deregistered_fds; + /// println!("{} fds are currently registered by the runtime's I/O driver.", current_fd_count); + /// } + /// ``` + pub fn io_driver_fd_registered_count(&self) -> u64 { + self.with_io_driver_metrics(|m| { + m.fd_registered_count.load(Relaxed) + }) + } + + /// Returns the number of file descriptors that have been deregistered by the + /// runtime's I/O driver. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.io_driver_fd_deregistered_count(); + /// println!("{} fds have been deregistered by the runtime's I/O driver.", n); + /// } + /// ``` + pub fn io_driver_fd_deregistered_count(&self) -> u64 { + self.with_io_driver_metrics(|m| { + m.fd_deregistered_count.load(Relaxed) + }) + } + + /// Returns the number of ready events processed by the runtime's + /// I/O driver. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.io_driver_ready_count(); + /// println!("{} ready events processed by the runtime's I/O driver.", n); + /// } + /// ``` + pub fn io_driver_ready_count(&self) -> u64 { + self.with_io_driver_metrics(|m| m.ready_count.load(Relaxed)) + } + + fn with_io_driver_metrics(&self, f: F) -> u64 + where + F: Fn(&super::IoDriverMetrics) -> u64, + { + // TODO: Investigate if this should return 0, most of our metrics always increase + // thus this breaks that guarantee. + self.handle + .inner + .driver() + .io + .as_ref() + .map(|h| f(&h.metrics)) + .unwrap_or(0) + } } } } diff --git a/tokio/src/runtime/metrics/worker.rs b/tokio/src/runtime/metrics/worker.rs index fc7c4e6dfe4..a396bf5a391 100644 --- a/tokio/src/runtime/metrics/worker.rs +++ b/tokio/src/runtime/metrics/worker.rs @@ -1,8 +1,10 @@ -use crate::loom::sync::atomic::AtomicUsize; -use crate::loom::sync::atomic::Ordering::Relaxed; use crate::runtime::metrics::Histogram; use crate::runtime::Config; use crate::util::metric_atomics::MetricAtomicU64; +// This is NOT the Loom atomic. To avoid an unnecessary state explosion in loom, +// all metrics use regular atomics. +use std::sync::atomic::AtomicUsize; +use std::sync::atomic::Ordering::Relaxed; /// Retrieve runtime worker metrics. /// diff --git a/tokio/src/runtime/mod.rs b/tokio/src/runtime/mod.rs index 3d333960f3d..3fcde75b54e 100644 --- a/tokio/src/runtime/mod.rs +++ b/tokio/src/runtime/mod.rs @@ -388,21 +388,18 @@ cfg_rt! { mod thread_id; pub(crate) use thread_id::ThreadId; - cfg_metrics! { - mod metrics; - pub use metrics::{RuntimeMetrics, HistogramScale}; + pub(crate) mod metrics; + pub use metrics::RuntimeMetrics; - pub(crate) use metrics::{MetricsBatch, SchedulerMetrics, WorkerMetrics, HistogramBuilder}; + cfg_unstable_metrics! { + pub use metrics::HistogramScale; cfg_net! { - pub(crate) use metrics::IoDriverMetrics; + pub(crate) use metrics::IoDriverMetrics; } } - cfg_not_metrics! { - pub(crate) mod metrics; - pub(crate) use metrics::{SchedulerMetrics, WorkerMetrics, MetricsBatch, HistogramBuilder}; - } + pub(crate) use metrics::{MetricsBatch, SchedulerMetrics, WorkerMetrics, HistogramBuilder}; /// After thread starts / before thread stops type Callback = std::sync::Arc; diff --git a/tokio/src/runtime/runtime.rs b/tokio/src/runtime/runtime.rs index 7cf2cebeffc..d904af50458 100644 --- a/tokio/src/runtime/runtime.rs +++ b/tokio/src/runtime/runtime.rs @@ -455,6 +455,12 @@ impl Runtime { pub fn shutdown_background(self) { self.shutdown_timeout(Duration::from_nanos(0)); } + + /// Returns a view that lets you get information about how the runtime + /// is performing. + pub fn metrics(&self) -> crate::runtime::RuntimeMetrics { + self.handle.metrics() + } } #[allow(clippy::single_match)] // there are comments in the error branch, so we don't want if-let @@ -486,13 +492,3 @@ impl Drop for Runtime { impl std::panic::UnwindSafe for Runtime {} impl std::panic::RefUnwindSafe for Runtime {} - -cfg_metrics! { - impl Runtime { - /// Returns a view that lets you get information about how the runtime - /// is performing. - pub fn metrics(&self) -> crate::runtime::RuntimeMetrics { - self.handle.metrics() - } - } -} diff --git a/tokio/src/runtime/scheduler/current_thread/mod.rs b/tokio/src/runtime/scheduler/current_thread/mod.rs index 36bcefc4406..b9c23837a58 100644 --- a/tokio/src/runtime/scheduler/current_thread/mod.rs +++ b/tokio/src/runtime/scheduler/current_thread/mod.rs @@ -502,7 +502,7 @@ impl Handle { } } -cfg_metrics! { +cfg_unstable_metrics! { impl Handle { pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { &self.shared.scheduler_metrics diff --git a/tokio/src/runtime/scheduler/inject.rs b/tokio/src/runtime/scheduler/inject.rs index 39976fcd7a2..811b02c136c 100644 --- a/tokio/src/runtime/scheduler/inject.rs +++ b/tokio/src/runtime/scheduler/inject.rs @@ -16,7 +16,7 @@ cfg_rt_multi_thread! { mod rt_multi_thread; } -cfg_metrics! { +cfg_unstable_metrics! { mod metrics; } diff --git a/tokio/src/runtime/scheduler/mod.rs b/tokio/src/runtime/scheduler/mod.rs index 04fbff39e47..3cbba11b752 100644 --- a/tokio/src/runtime/scheduler/mod.rs +++ b/tokio/src/runtime/scheduler/mod.rs @@ -163,20 +163,22 @@ cfg_rt! { } } - cfg_metrics! { + impl Handle { + pub(crate) fn num_workers(&self) -> usize { + match self { + Handle::CurrentThread(_) => 1, + #[cfg(feature = "rt-multi-thread")] + Handle::MultiThread(handle) => handle.num_workers(), + #[cfg(all(tokio_unstable, feature = "rt-multi-thread"))] + Handle::MultiThreadAlt(handle) => handle.num_workers(), + } + } + } + + cfg_unstable_metrics! { use crate::runtime::{SchedulerMetrics, WorkerMetrics}; impl Handle { - pub(crate) fn num_workers(&self) -> usize { - match self { - Handle::CurrentThread(_) => 1, - #[cfg(feature = "rt-multi-thread")] - Handle::MultiThread(handle) => handle.num_workers(), - #[cfg(all(tokio_unstable, feature = "rt-multi-thread"))] - Handle::MultiThreadAlt(handle) => handle.num_workers(), - } - } - pub(crate) fn num_blocking_threads(&self) -> usize { match_flavor!(self, Handle(handle) => handle.num_blocking_threads()) } diff --git a/tokio/src/runtime/scheduler/multi_thread/handle.rs b/tokio/src/runtime/scheduler/multi_thread/handle.rs index 568eb80af8b..72f776e47fa 100644 --- a/tokio/src/runtime/scheduler/multi_thread/handle.rs +++ b/tokio/src/runtime/scheduler/multi_thread/handle.rs @@ -9,9 +9,7 @@ use crate::util::RngSeedGenerator; use std::fmt; -cfg_metrics! { - mod metrics; -} +mod metrics; cfg_taskdump! { mod taskdump; diff --git a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs index 3d614b478c5..6ced245ee5b 100644 --- a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs +++ b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs @@ -1,44 +1,48 @@ use super::Handle; -use crate::runtime::{SchedulerMetrics, WorkerMetrics}; +cfg_unstable_metrics! { + use crate::runtime::{SchedulerMetrics, WorkerMetrics}; +} impl Handle { pub(crate) fn num_workers(&self) -> usize { self.shared.worker_metrics.len() } - pub(crate) fn num_blocking_threads(&self) -> usize { - // workers are currently spawned using spawn_blocking - self.blocking_spawner - .num_threads() - .saturating_sub(self.num_workers()) - } + cfg_unstable_metrics! { + pub(crate) fn num_blocking_threads(&self) -> usize { + // workers are currently spawned using spawn_blocking + self.blocking_spawner + .num_threads() + .saturating_sub(self.num_workers()) + } - pub(crate) fn num_idle_blocking_threads(&self) -> usize { - self.blocking_spawner.num_idle_threads() - } + pub(crate) fn num_idle_blocking_threads(&self) -> usize { + self.blocking_spawner.num_idle_threads() + } - pub(crate) fn active_tasks_count(&self) -> usize { - self.shared.owned.active_tasks_count() - } + pub(crate) fn active_tasks_count(&self) -> usize { + self.shared.owned.active_tasks_count() + } - pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { - &self.shared.scheduler_metrics - } + pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { + &self.shared.scheduler_metrics + } - pub(crate) fn worker_metrics(&self, worker: usize) -> &WorkerMetrics { - &self.shared.worker_metrics[worker] - } + pub(crate) fn worker_metrics(&self, worker: usize) -> &WorkerMetrics { + &self.shared.worker_metrics[worker] + } - pub(crate) fn injection_queue_depth(&self) -> usize { - self.shared.injection_queue_depth() - } + pub(crate) fn injection_queue_depth(&self) -> usize { + self.shared.injection_queue_depth() + } - pub(crate) fn worker_local_queue_depth(&self, worker: usize) -> usize { - self.shared.worker_local_queue_depth(worker) - } + pub(crate) fn worker_local_queue_depth(&self, worker: usize) -> usize { + self.shared.worker_local_queue_depth(worker) + } - pub(crate) fn blocking_queue_depth(&self) -> usize { - self.blocking_spawner.queue_depth() + pub(crate) fn blocking_queue_depth(&self) -> usize { + self.blocking_spawner.queue_depth() + } } } diff --git a/tokio/src/runtime/scheduler/multi_thread/queue.rs b/tokio/src/runtime/scheduler/multi_thread/queue.rs index 35223289870..99ee31ba15b 100644 --- a/tokio/src/runtime/scheduler/multi_thread/queue.rs +++ b/tokio/src/runtime/scheduler/multi_thread/queue.rs @@ -546,7 +546,7 @@ impl Steal { } } -cfg_metrics! { +cfg_unstable_metrics! { impl Steal { pub(crate) fn len(&self) -> usize { self.0.len() as _ diff --git a/tokio/src/runtime/scheduler/multi_thread/worker.rs b/tokio/src/runtime/scheduler/multi_thread/worker.rs index 9f0dd98dfdc..65851b21e82 100644 --- a/tokio/src/runtime/scheduler/multi_thread/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread/worker.rs @@ -74,7 +74,7 @@ use std::cell::RefCell; use std::task::Waker; use std::time::Duration; -cfg_metrics! { +cfg_unstable_metrics! { mod metrics; } diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/handle.rs b/tokio/src/runtime/scheduler/multi_thread_alt/handle.rs index d746bca1a18..1f5b7818521 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/handle.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/handle.rs @@ -9,7 +9,7 @@ use crate::util::RngSeedGenerator; use std::fmt; -cfg_metrics! { +cfg_unstable_metrics! { mod metrics; } diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/queue.rs b/tokio/src/runtime/scheduler/multi_thread_alt/queue.rs index 2694d27cbdf..c8293fdc845 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/queue.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/queue.rs @@ -538,7 +538,7 @@ impl Steal { } } -cfg_metrics! { +cfg_unstable_metrics! { impl Steal { pub(crate) fn len(&self) -> usize { self.0.len() as _ diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs index 63ae0a49743..9ceb7815a53 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs @@ -74,7 +74,7 @@ use std::cmp; use std::task::Waker; use std::time::Duration; -cfg_metrics! { +cfg_unstable_metrics! { mod metrics; } diff --git a/tokio/src/runtime/tests/queue.rs b/tokio/src/runtime/tests/queue.rs index 55429b1b11b..f463355f0d3 100644 --- a/tokio/src/runtime/tests/queue.rs +++ b/tokio/src/runtime/tests/queue.rs @@ -40,7 +40,7 @@ fn fits_256_one_at_a_time() { local.push_back_or_overflow(task, &inject, &mut stats); } - cfg_metrics! { + cfg_unstable_metrics! { assert_metrics!(stats, overflow_count == 0); } @@ -98,7 +98,7 @@ fn overflow() { local.push_back_or_overflow(task, &inject, &mut stats); } - cfg_metrics! { + cfg_unstable_metrics! { assert_metrics!(stats, overflow_count == 1); } @@ -128,7 +128,7 @@ fn steal_batch() { assert!(steal1.steal_into(&mut local2, &mut stats).is_some()); - cfg_metrics! { + cfg_unstable_metrics! { assert_metrics!(stats, steal_count == 2); } @@ -184,7 +184,7 @@ fn stress1() { thread::yield_now(); } - cfg_metrics! { + cfg_unstable_metrics! { assert_metrics!(stats, steal_count == n as _); } From 97bb47b480c66083397c21d54e7ae33cab6c1b20 Mon Sep 17 00:00:00 2001 From: SteveLauC Date: Thu, 30 May 2024 16:44:53 +0800 Subject: [PATCH 027/119] task: fix a typo in doc of `LocalSet::run_until` (#6599) --- tokio/src/task/local.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tokio/src/task/local.rs b/tokio/src/task/local.rs index a40708d08c2..d98697482cc 100644 --- a/tokio/src/task/local.rs +++ b/tokio/src/task/local.rs @@ -598,7 +598,7 @@ impl LocalSet { /// allowing it to call [`spawn_local`] to spawn additional `!Send` futures. /// Any local futures spawned on the local set will be driven in the /// background until the future passed to `run_until` completes. When the future - /// passed to `run` finishes, any local futures which have not completed + /// passed to `run_until` finishes, any local futures which have not completed /// will remain on the local set, and will be driven on subsequent calls to /// `run_until` or when [awaiting the local set] itself. /// From 873cb8ae2fc291eaffbd71e3c83d17b2f0ed7abf Mon Sep 17 00:00:00 2001 From: Weijia Jiang Date: Thu, 30 May 2024 16:45:45 +0800 Subject: [PATCH 028/119] runtime: move task out of the `lifo_slot` in `block_in_place` (#6596) --- tokio/src/runtime/scheduler/multi_thread/worker.rs | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/tokio/src/runtime/scheduler/multi_thread/worker.rs b/tokio/src/runtime/scheduler/multi_thread/worker.rs index 65851b21e82..8ef487b09fd 100644 --- a/tokio/src/runtime/scheduler/multi_thread/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread/worker.rs @@ -395,11 +395,19 @@ where let cx = maybe_cx.expect("no .is_some() == false cases above should lead here"); // Get the worker core. If none is set, then blocking is fine! - let core = match cx.core.borrow_mut().take() { + let mut core = match cx.core.borrow_mut().take() { Some(core) => core, None => return Ok(()), }; + // If we heavily call `spawn_blocking`, there might be no available thread to + // run this core. Except for the task in the lifo_slot, all tasks can be + // stolen, so we move the task out of the lifo_slot to the run_queue. + if let Some(task) = core.lifo_slot.take() { + core.run_queue + .push_back_or_overflow(task, &*cx.worker.handle, &mut core.stats); + } + // We are taking the core from the context and sending it to another // thread. take_core = true; From dbf93c71844a01574a10f9dee0d4d9655a569f0a Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Thu, 30 May 2024 22:21:16 +0200 Subject: [PATCH 029/119] sync: fix incorrect is_empty on mpsc block boundaries (#6603) --- tokio/src/sync/mpsc/block.rs | 15 +++++++++------ tokio/tests/sync_mpsc.rs | 12 ++++++++++++ 2 files changed, 21 insertions(+), 6 deletions(-) diff --git a/tokio/src/sync/mpsc/block.rs b/tokio/src/sync/mpsc/block.rs index e7798592531..927c4566463 100644 --- a/tokio/src/sync/mpsc/block.rs +++ b/tokio/src/sync/mpsc/block.rs @@ -168,14 +168,17 @@ impl Block { Some(Read::Value(value.assume_init())) } - /// Returns true if there is a value in the slot to be consumed + /// Returns true if *this* block has a value in the given slot. /// - /// # Safety - /// - /// To maintain safety, the caller must ensure: - /// - /// * No concurrent access to the slot. + /// Always returns false when given an index from a different block. pub(crate) fn has_value(&self, slot_index: usize) -> bool { + if slot_index < self.header.start_index { + return false; + } + if slot_index >= self.header.start_index + super::BLOCK_CAP { + return false; + } + let offset = offset(slot_index); let ready_bits = self.header.ready_slots.load(Acquire); is_ready(ready_bits, offset) diff --git a/tokio/tests/sync_mpsc.rs b/tokio/tests/sync_mpsc.rs index 10a80561537..cc88fa79972 100644 --- a/tokio/tests/sync_mpsc.rs +++ b/tokio/tests/sync_mpsc.rs @@ -1421,4 +1421,16 @@ async fn test_rx_unbounded_len_when_close_is_called_after_dropping_sender() { assert_eq!(rx.len(), 1); } +// Regression test for https://github.com/tokio-rs/tokio/issues/6602 +#[tokio::test] +async fn test_is_empty_32_msgs() { + let (sender, mut receiver) = mpsc::channel(33); + + for value in 1..257 { + sender.send(value).await.unwrap(); + receiver.recv().await.unwrap(); + assert!(receiver.is_empty(), "{value}. len: {}", receiver.len()); + } +} + fn is_debug(_: &T) {} From 65cbf730de48ef9d3c84959d26ab717a85a5de62 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Thu, 30 May 2024 22:21:51 +0200 Subject: [PATCH 030/119] chore: prepare tokio-macros v2.3.0 (#6600) --- tokio-macros/CHANGELOG.md | 6 ++++++ tokio-macros/Cargo.toml | 2 +- tokio/Cargo.toml | 2 +- 3 files changed, 8 insertions(+), 2 deletions(-) diff --git a/tokio-macros/CHANGELOG.md b/tokio-macros/CHANGELOG.md index 32961394a09..9d305bf3b74 100644 --- a/tokio-macros/CHANGELOG.md +++ b/tokio-macros/CHANGELOG.md @@ -1,3 +1,9 @@ +# 2.3.0 (May 30th, 2024) + +- macros: make `#[tokio::test]` append `#[test]` at the end of the attribute list ([#6497]) + +[#6497]: https://github.com/tokio-rs/tokio/pull/6497 + # 2.2.0 (November 19th, 2023) ### Changed diff --git a/tokio-macros/Cargo.toml b/tokio-macros/Cargo.toml index ea9839c6d06..c150334880c 100644 --- a/tokio-macros/Cargo.toml +++ b/tokio-macros/Cargo.toml @@ -4,7 +4,7 @@ name = "tokio-macros" # - Remove path dependencies # - Update CHANGELOG.md. # - Create "tokio-macros-1.x.y" git tag. -version = "2.2.0" +version = "2.3.0" edition = "2021" rust-version = "1.63" authors = ["Tokio Contributors "] diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index e46e274c47a..548c5f6e7aa 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -89,7 +89,7 @@ test-util = ["rt", "sync", "time"] time = [] [dependencies] -tokio-macros = { version = "~2.2.0", path = "../tokio-macros", optional = true } +tokio-macros = { version = "~2.3.0", path = "../tokio-macros", optional = true } pin-project-lite = "0.2.11" From 14c17fc09656a30230177b600bacceb9db33e942 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Thu, 30 May 2024 22:24:58 +0200 Subject: [PATCH 031/119] chore: prepare Tokio v1.38.0 (#6601) --- README.md | 2 +- tokio/CHANGELOG.md | 100 +++++++++++++++++++++++++++++++++++++++++++++ tokio/Cargo.toml | 2 +- tokio/README.md | 2 +- 4 files changed, 103 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index 5706d1ab6b0..b9d9eb785c3 100644 --- a/README.md +++ b/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.37.0", features = ["full"] } +tokio = { version = "1.38.0", features = ["full"] } ``` Then, on your main.rs: diff --git a/tokio/CHANGELOG.md b/tokio/CHANGELOG.md index 54346a78d97..acd3bacd5e6 100644 --- a/tokio/CHANGELOG.md +++ b/tokio/CHANGELOG.md @@ -1,3 +1,103 @@ +# 1.38.0 (May 30th, 2024) + +This release marks the beginning of stabilization for runtime metrics. It +stabilizes `RuntimeMetrics::worker_count`. Future releases will continue to +stabilize more metrics. + +### Added + +- fs: add `File::create_new` ([#6573]) +- io: add `copy_bidirectional_with_sizes` ([#6500]) +- io: implement `AsyncBufRead` for `Join` ([#6449]) +- net: add Apple visionOS support ([#6465]) +- net: implement `Clone` for `NamedPipeInfo` ([#6586]) +- net: support QNX OS ([#6421]) +- sync: add `Notify::notify_last` ([#6520]) +- sync: add `mpsc::Receiver::{capacity,max_capacity}` ([#6511]) +- sync: add `split` method to the semaphore permit ([#6472], [#6478]) +- task: add `tokio::task::join_set::Builder::spawn_blocking` ([#6578]) +- wasm: support rt-multi-thread with wasm32-wasi-preview1-threads ([#6510]) + +### Changed + +- macros: make `#[tokio::test]` append `#[test]` at the end of the attribute list ([#6497]) +- metrics: fix `blocking_threads` count ([#6551]) +- metrics: stabilize `RuntimeMetrics::worker_count` ([#6556]) +- runtime: move task out of the `lifo_slot` in `block_in_place` ([#6596]) +- runtime: panic if `global_queue_interval` is zero ([#6445]) +- sync: always drop message in destructor for oneshot receiver ([#6558]) +- sync: instrument `Semaphore` for task dumps ([#6499]) +- sync: use FIFO ordering when waking batches of wakers ([#6521]) +- task: make `LocalKey::get` work with Clone types ([#6433]) +- tests: update nix and mio-aio dev-dependencies ([#6552]) +- time: clean up implementation ([#6517]) +- time: lazily init timers on first poll ([#6512]) +- time: remove the `true_when` field in `TimerShared` ([#6563]) +- time: use sharding for timer implementation ([#6534]) + +### Fixed + +- taskdump: allow building taskdump docs on non-unix machines ([#6564]) +- time: check for overflow in `Interval::poll_tick` ([#6487]) +- sync: fix incorrect `is_empty` on mpsc block boundaries ([#6603]) + +### Documented + +- fs: rewrite file system docs ([#6467]) +- io: fix `stdin` documentation ([#6581]) +- io: fix obsolete reference in `ReadHalf::unsplit()` documentation ([#6498]) +- macros: render more comprehensible documentation for `select!` ([#6468]) +- net: add missing types to module docs ([#6482]) +- net: fix misleading `NamedPipeServer` example ([#6590]) +- sync: add examples for `SemaphorePermit`, `OwnedSemaphorePermit` ([#6477]) +- sync: document that `Barrier::wait` is not cancel safe ([#6494]) +- sync: explain relation between `watch::Sender::{subscribe,closed}` ([#6490]) +- task: clarify that you can't abort `spawn_blocking` tasks ([#6571]) +- task: fix a typo in doc of `LocalSet::run_until` ([#6599]) +- time: fix test-util requirement for pause and resume in docs ([#6503]) + +[#6421]: https://github.com/tokio-rs/tokio/pull/6421 +[#6433]: https://github.com/tokio-rs/tokio/pull/6433 +[#6445]: https://github.com/tokio-rs/tokio/pull/6445 +[#6449]: https://github.com/tokio-rs/tokio/pull/6449 +[#6465]: https://github.com/tokio-rs/tokio/pull/6465 +[#6467]: https://github.com/tokio-rs/tokio/pull/6467 +[#6468]: https://github.com/tokio-rs/tokio/pull/6468 +[#6472]: https://github.com/tokio-rs/tokio/pull/6472 +[#6477]: https://github.com/tokio-rs/tokio/pull/6477 +[#6478]: https://github.com/tokio-rs/tokio/pull/6478 +[#6482]: https://github.com/tokio-rs/tokio/pull/6482 +[#6487]: https://github.com/tokio-rs/tokio/pull/6487 +[#6490]: https://github.com/tokio-rs/tokio/pull/6490 +[#6494]: https://github.com/tokio-rs/tokio/pull/6494 +[#6497]: https://github.com/tokio-rs/tokio/pull/6497 +[#6498]: https://github.com/tokio-rs/tokio/pull/6498 +[#6499]: https://github.com/tokio-rs/tokio/pull/6499 +[#6500]: https://github.com/tokio-rs/tokio/pull/6500 +[#6503]: https://github.com/tokio-rs/tokio/pull/6503 +[#6510]: https://github.com/tokio-rs/tokio/pull/6510 +[#6511]: https://github.com/tokio-rs/tokio/pull/6511 +[#6512]: https://github.com/tokio-rs/tokio/pull/6512 +[#6517]: https://github.com/tokio-rs/tokio/pull/6517 +[#6520]: https://github.com/tokio-rs/tokio/pull/6520 +[#6521]: https://github.com/tokio-rs/tokio/pull/6521 +[#6534]: https://github.com/tokio-rs/tokio/pull/6534 +[#6551]: https://github.com/tokio-rs/tokio/pull/6551 +[#6552]: https://github.com/tokio-rs/tokio/pull/6552 +[#6556]: https://github.com/tokio-rs/tokio/pull/6556 +[#6558]: https://github.com/tokio-rs/tokio/pull/6558 +[#6563]: https://github.com/tokio-rs/tokio/pull/6563 +[#6564]: https://github.com/tokio-rs/tokio/pull/6564 +[#6571]: https://github.com/tokio-rs/tokio/pull/6571 +[#6573]: https://github.com/tokio-rs/tokio/pull/6573 +[#6578]: https://github.com/tokio-rs/tokio/pull/6578 +[#6581]: https://github.com/tokio-rs/tokio/pull/6581 +[#6586]: https://github.com/tokio-rs/tokio/pull/6586 +[#6590]: https://github.com/tokio-rs/tokio/pull/6590 +[#6596]: https://github.com/tokio-rs/tokio/pull/6596 +[#6599]: https://github.com/tokio-rs/tokio/pull/6599 +[#6603]: https://github.com/tokio-rs/tokio/pull/6603 + # 1.37.0 (March 28th, 2024) ### Added diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index 548c5f6e7aa..ac759515315 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -6,7 +6,7 @@ name = "tokio" # - README.md # - Update CHANGELOG.md. # - Create "v1.x.y" git tag. -version = "1.37.0" +version = "1.38.0" edition = "2021" rust-version = "1.63" authors = ["Tokio Contributors "] diff --git a/tokio/README.md b/tokio/README.md index 5706d1ab6b0..b9d9eb785c3 100644 --- a/tokio/README.md +++ b/tokio/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.37.0", features = ["full"] } +tokio = { version = "1.38.0", features = ["full"] } ``` Then, on your main.rs: From 75c953bd639ee8630f678a02edd87e7814b04abc Mon Sep 17 00:00:00 2001 From: Weijia Jiang Date: Tue, 4 Jun 2024 15:45:35 +0800 Subject: [PATCH 032/119] time: fix big time panic issue (#6612) --- tokio/src/runtime/time/source.rs | 14 +++++++++++--- tokio/src/runtime/time/tests/mod.rs | 14 ++++++++++++++ 2 files changed, 25 insertions(+), 3 deletions(-) diff --git a/tokio/src/runtime/time/source.rs b/tokio/src/runtime/time/source.rs index e371c207cdb..e3ba8d790c0 100644 --- a/tokio/src/runtime/time/source.rs +++ b/tokio/src/runtime/time/source.rs @@ -22,9 +22,11 @@ impl TimeSource { pub(crate) fn instant_to_tick(&self, t: Instant) -> u64 { // round up let dur: Duration = t.saturating_duration_since(self.start_time); - let ms = dur.as_millis(); - - ms.try_into().unwrap_or(MAX_SAFE_MILLIS_DURATION) + let ms = dur + .as_millis() + .try_into() + .unwrap_or(MAX_SAFE_MILLIS_DURATION); + ms.min(MAX_SAFE_MILLIS_DURATION) } pub(crate) fn tick_to_duration(&self, t: u64) -> Duration { @@ -34,4 +36,10 @@ impl TimeSource { pub(crate) fn now(&self, clock: &Clock) -> u64 { self.instant_to_tick(clock.now()) } + + #[cfg(test)] + #[allow(dead_code)] + pub(super) fn start_time(&self) -> Instant { + self.start_time + } } diff --git a/tokio/src/runtime/time/tests/mod.rs b/tokio/src/runtime/time/tests/mod.rs index 676cf55f9c6..0e453433691 100644 --- a/tokio/src/runtime/time/tests/mod.rs +++ b/tokio/src/runtime/time/tests/mod.rs @@ -267,3 +267,17 @@ fn poll_process_levels_targeted() { handle.process_at_time(0, 192); handle.process_at_time(0, 192); } + +#[test] +#[cfg(not(loom))] +fn instant_to_tick_max() { + use crate::runtime::time::entry::MAX_SAFE_MILLIS_DURATION; + + let rt = rt(true); + let handle = rt.handle().inner.driver().time(); + + let start_time = handle.time_source.start_time(); + let long_future = start_time + std::time::Duration::from_millis(MAX_SAFE_MILLIS_DURATION + 1); + + assert!(handle.time_source.instant_to_tick(long_future) <= MAX_SAFE_MILLIS_DURATION); +} From 8fca6f6dad209b9f6200202d8a46a9769f796ce7 Mon Sep 17 00:00:00 2001 From: Timo <39920115+tglane@users.noreply.github.com> Date: Tue, 4 Jun 2024 13:34:22 +0200 Subject: [PATCH 033/119] process: add `Command::as_std_mut` (#6608) --- tokio/src/process/mod.rs | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tokio/src/process/mod.rs b/tokio/src/process/mod.rs index 585dbdd6af6..fc768809f02 100644 --- a/tokio/src/process/mod.rs +++ b/tokio/src/process/mod.rs @@ -325,6 +325,12 @@ impl Command { &self.std } + /// Cheaply convert to a `&mut std::process::Command` for places where the type from the + /// standard library is expected. + pub fn as_std_mut(&mut self) -> &mut StdCommand { + &mut self.std + } + /// Adds an argument to pass to the program. /// /// Only one argument can be passed per use. So instead of: From a91d43823ceeb11b5640a5eed89da362b128c058 Mon Sep 17 00:00:00 2001 From: Alan Somers Date: Tue, 4 Jun 2024 15:37:13 -0600 Subject: [PATCH 034/119] ci: update FreeBSD CI environment (#6616) Use the newly released FreeBSD 14.1. --- .cirrus.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.cirrus.yml b/.cirrus.yml index bdf3af74098..a7ce0d9d456 100644 --- a/.cirrus.yml +++ b/.cirrus.yml @@ -1,7 +1,7 @@ only_if: $CIRRUS_TAG == '' && ($CIRRUS_PR != '' || $CIRRUS_BRANCH == 'master' || $CIRRUS_BRANCH =~ 'tokio-.*') auto_cancellation: $CIRRUS_BRANCH != 'master' && $CIRRUS_BRANCH !=~ 'tokio-.*' freebsd_instance: - image_family: freebsd-14-0 + image_family: freebsd-14-1 env: RUST_STABLE: stable RUST_NIGHTLY: nightly-2024-05-05 From 49609d073f9f8e39e5583ba3f5d459b100392af5 Mon Sep 17 00:00:00 2001 From: Emil Loer Date: Tue, 4 Jun 2024 23:42:42 +0200 Subject: [PATCH 035/119] test: make `Spawn` forward `size_hint` (#6607) --- tokio-test/src/task.rs | 4 ++++ tokio-test/tests/task.rs | 25 +++++++++++++++++++++++++ 2 files changed, 29 insertions(+) create mode 100644 tokio-test/tests/task.rs diff --git a/tokio-test/src/task.rs b/tokio-test/src/task.rs index 812f908aca8..2e646d44bf8 100644 --- a/tokio-test/src/task.rs +++ b/tokio-test/src/task.rs @@ -148,6 +148,10 @@ impl Stream for Spawn { fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { self.future.as_mut().poll_next(cx) } + + fn size_hint(&self) -> (usize, Option) { + self.future.size_hint() + } } impl MockTask { diff --git a/tokio-test/tests/task.rs b/tokio-test/tests/task.rs new file mode 100644 index 00000000000..a464bf9b7c5 --- /dev/null +++ b/tokio-test/tests/task.rs @@ -0,0 +1,25 @@ +use std::pin::Pin; +use std::task::{Context, Poll}; +use tokio_stream::Stream; +use tokio_test::task; + +/// A [`Stream`] that has a stub size hint. +struct SizedStream; + +impl Stream for SizedStream { + type Item = (); + + fn poll_next(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Poll::Pending + } + + fn size_hint(&self) -> (usize, Option) { + (100, Some(200)) + } +} + +#[test] +fn test_spawn_stream_size_hint() { + let spawn = task::spawn(SizedStream); + assert_eq!(spawn.size_hint(), (100, Some(200))); +} From 3f397ccdedf513d9b8e8d316eca8b45a6bf7656c Mon Sep 17 00:00:00 2001 From: Armillus <37043348+Armillus@users.noreply.github.com> Date: Wed, 5 Jun 2024 00:29:28 +0200 Subject: [PATCH 036/119] io: read during write in `copy_bidirectional` and `copy` (#6532) --- tokio/src/io/util/copy.rs | 55 +++++++++++++++++++++------------------ 1 file changed, 30 insertions(+), 25 deletions(-) diff --git a/tokio/src/io/util/copy.rs b/tokio/src/io/util/copy.rs index 47f8d4ebec6..4fcec907578 100644 --- a/tokio/src/io/util/copy.rs +++ b/tokio/src/io/util/copy.rs @@ -96,12 +96,9 @@ impl CopyBuffer { // Keep track of task budget let coop = ready!(crate::runtime::coop::poll_proceed(cx)); loop { - // If our buffer is empty, then we need to read some data to - // continue. - if self.pos == self.cap && !self.read_done { - self.pos = 0; - self.cap = 0; - + // If there is some space left in our buffer, then we try to read some + // data to continue, thus maximizing the chances of a large write. + if self.cap < self.buf.len() && !self.read_done { match self.poll_fill_buf(cx, reader.as_mut()) { Poll::Ready(Ok(())) => { #[cfg(any( @@ -131,25 +128,29 @@ impl CopyBuffer { return Poll::Ready(Err(err)); } Poll::Pending => { - // Try flushing when the reader has no progress to avoid deadlock - // when the reader depends on buffered writer. - if self.need_flush { - ready!(writer.as_mut().poll_flush(cx))?; - #[cfg(any( - feature = "fs", - feature = "io-std", - feature = "net", - feature = "process", - feature = "rt", - feature = "signal", - feature = "sync", - feature = "time", - ))] - coop.made_progress(); - self.need_flush = false; - } + // Ignore pending reads when our buffer is not empty, because + // we can try to write data immediately. + if self.pos == self.cap { + // Try flushing when the reader has no progress to avoid deadlock + // when the reader depends on buffered writer. + if self.need_flush { + ready!(writer.as_mut().poll_flush(cx))?; + #[cfg(any( + feature = "fs", + feature = "io-std", + feature = "net", + feature = "process", + feature = "rt", + feature = "signal", + feature = "sync", + feature = "time", + ))] + coop.made_progress(); + self.need_flush = false; + } - return Poll::Pending; + return Poll::Pending; + } } } } @@ -188,9 +189,13 @@ impl CopyBuffer { "writer returned length larger than input slice" ); + // All data has been written, the buffer can be considered empty again + self.pos = 0; + self.cap = 0; + // If we've written all the data and we've seen EOF, flush out the // data and finish the transfer. - if self.pos == self.cap && self.read_done { + if self.read_done { ready!(writer.as_mut().poll_flush(cx))?; #[cfg(any( feature = "fs", From 16fccafb416eb7dd0e324114886cf94021e208ff Mon Sep 17 00:00:00 2001 From: John-John Tedro Date: Wed, 5 Jun 2024 10:20:27 +0200 Subject: [PATCH 037/119] docs: fix docsrs builds with the fs feature enabled (#6585) --- tokio/src/doc/mod.rs | 2 +- tokio/src/lib.rs | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tokio/src/doc/mod.rs b/tokio/src/doc/mod.rs index 0279630c9df..d0b37416711 100644 --- a/tokio/src/doc/mod.rs +++ b/tokio/src/doc/mod.rs @@ -43,5 +43,5 @@ impl mio::event::Source for NotDefinedHere { } } -#[cfg(feature = "net")] +#[cfg(any(feature = "net", feature = "fs"))] pub mod os; diff --git a/tokio/src/lib.rs b/tokio/src/lib.rs index bacc8192742..70ff89fbfe7 100644 --- a/tokio/src/lib.rs +++ b/tokio/src/lib.rs @@ -628,7 +628,7 @@ pub mod stream {} #[cfg(docsrs)] pub mod doc; -#[cfg(feature = "net")] +#[cfg(any(feature = "net", feature = "fs"))] #[cfg(docsrs)] #[allow(unused)] pub(crate) use self::doc::os; From 8e15c234c60cf8132c490ccf03dd31738cfeaca8 Mon Sep 17 00:00:00 2001 From: Russell Cohen Date: Thu, 6 Jun 2024 04:08:46 -0400 Subject: [PATCH 038/119] metrics: add `MetricAtomicUsize` for usized-metrics (#6598) --- tokio/src/runtime/blocking/pool.rs | 21 +++++++++++---------- tokio/src/runtime/metrics/worker.rs | 23 ++++------------------- tokio/src/util/metric_atomics.rs | 28 ++++++++++++++++++++++++++++ 3 files changed, 43 insertions(+), 29 deletions(-) diff --git a/tokio/src/runtime/blocking/pool.rs b/tokio/src/runtime/blocking/pool.rs index 3757079f329..2b283a56bba 100644 --- a/tokio/src/runtime/blocking/pool.rs +++ b/tokio/src/runtime/blocking/pool.rs @@ -7,11 +7,12 @@ use crate::runtime::blocking::{shutdown, BlockingTask}; use crate::runtime::builder::ThreadNameFn; use crate::runtime::task::{self, JoinHandle}; use crate::runtime::{Builder, Callback, Handle}; +use crate::util::metric_atomics::MetricAtomicUsize; use std::collections::{HashMap, VecDeque}; use std::fmt; use std::io; -use std::sync::atomic::{AtomicUsize, Ordering}; +use std::sync::atomic::Ordering; use std::time::Duration; pub(crate) struct BlockingPool { @@ -26,9 +27,9 @@ pub(crate) struct Spawner { #[derive(Default)] pub(crate) struct SpawnerMetrics { - num_threads: AtomicUsize, - num_idle_threads: AtomicUsize, - queue_depth: AtomicUsize, + num_threads: MetricAtomicUsize, + num_idle_threads: MetricAtomicUsize, + queue_depth: MetricAtomicUsize, } impl SpawnerMetrics { @@ -47,27 +48,27 @@ impl SpawnerMetrics { } fn inc_num_threads(&self) { - self.num_threads.fetch_add(1, Ordering::Relaxed); + self.num_threads.increment(); } fn dec_num_threads(&self) { - self.num_threads.fetch_sub(1, Ordering::Relaxed); + self.num_threads.decrement(); } fn inc_num_idle_threads(&self) { - self.num_idle_threads.fetch_add(1, Ordering::Relaxed); + self.num_idle_threads.increment(); } fn dec_num_idle_threads(&self) -> usize { - self.num_idle_threads.fetch_sub(1, Ordering::Relaxed) + self.num_idle_threads.decrement() } fn inc_queue_depth(&self) { - self.queue_depth.fetch_add(1, Ordering::Relaxed); + self.queue_depth.increment(); } fn dec_queue_depth(&self) { - self.queue_depth.fetch_sub(1, Ordering::Relaxed); + self.queue_depth.decrement(); } } diff --git a/tokio/src/runtime/metrics/worker.rs b/tokio/src/runtime/metrics/worker.rs index a396bf5a391..e5d2c6f17fd 100644 --- a/tokio/src/runtime/metrics/worker.rs +++ b/tokio/src/runtime/metrics/worker.rs @@ -1,9 +1,6 @@ use crate::runtime::metrics::Histogram; use crate::runtime::Config; -use crate::util::metric_atomics::MetricAtomicU64; -// This is NOT the Loom atomic. To avoid an unnecessary state explosion in loom, -// all metrics use regular atomics. -use std::sync::atomic::AtomicUsize; +use crate::util::metric_atomics::{MetricAtomicU64, MetricAtomicUsize}; use std::sync::atomic::Ordering::Relaxed; /// Retrieve runtime worker metrics. @@ -13,7 +10,7 @@ use std::sync::atomic::Ordering::Relaxed; /// features][unstable] for details. /// /// [unstable]: crate#unstable-features -#[derive(Debug)] +#[derive(Debug, Default)] #[repr(align(128))] pub(crate) struct WorkerMetrics { /// Number of times the worker parked. @@ -45,7 +42,7 @@ pub(crate) struct WorkerMetrics { /// Number of tasks currently in the local queue. Used only by the /// current-thread scheduler. - pub(crate) queue_depth: AtomicUsize, + pub(crate) queue_depth: MetricAtomicUsize, /// If `Some`, tracks the number of polls by duration range. pub(super) poll_count_histogram: Option, @@ -62,19 +59,7 @@ impl WorkerMetrics { } pub(crate) fn new() -> WorkerMetrics { - WorkerMetrics { - park_count: MetricAtomicU64::new(0), - noop_count: MetricAtomicU64::new(0), - steal_count: MetricAtomicU64::new(0), - steal_operations: MetricAtomicU64::new(0), - poll_count: MetricAtomicU64::new(0), - mean_poll_time: MetricAtomicU64::new(0), - overflow_count: MetricAtomicU64::new(0), - busy_duration_total: MetricAtomicU64::new(0), - local_schedule_count: MetricAtomicU64::new(0), - queue_depth: AtomicUsize::new(0), - poll_count_histogram: None, - } + WorkerMetrics::default() } pub(crate) fn queue_depth(&self) -> usize { diff --git a/tokio/src/util/metric_atomics.rs b/tokio/src/util/metric_atomics.rs index 3c080298ecf..332d2f268e1 100644 --- a/tokio/src/util/metric_atomics.rs +++ b/tokio/src/util/metric_atomics.rs @@ -45,3 +45,31 @@ impl MetricAtomicU64 { pub(crate) fn new(_value: u64) -> Self { Self { } } } } + +#[cfg_attr(not(all(tokio_unstable, feature = "rt")), allow(dead_code))] +/// `AtomicUsize` for use in metrics. +/// +/// This exposes simplified APIs for use in metrics & uses `std::sync` instead of Loom to avoid polluting loom logs with metric information. +#[derive(Debug, Default)] +pub(crate) struct MetricAtomicUsize { + value: std::sync::atomic::AtomicUsize, +} + +#[cfg_attr(not(all(tokio_unstable, feature = "rt")), allow(dead_code))] +impl MetricAtomicUsize { + pub(crate) fn load(&self, ordering: Ordering) -> usize { + self.value.load(ordering) + } + + pub(crate) fn store(&self, val: usize, ordering: Ordering) { + self.value.store(val, ordering) + } + + pub(crate) fn increment(&self) -> usize { + self.value.fetch_add(1, Ordering::Relaxed) + } + + pub(crate) fn decrement(&self) -> usize { + self.value.fetch_sub(1, Ordering::Relaxed) + } +} From 126ce89bb40f4d3ea2a174372694276e1b135985 Mon Sep 17 00:00:00 2001 From: Aaron Schweiger Date: Fri, 7 Jun 2024 03:17:25 -0400 Subject: [PATCH 039/119] task: implement `Clone` for `AbortHandle` (#6621) --- tokio/src/runtime/task/abort.rs | 8 ++++++++ tokio/src/runtime/tests/task.rs | 23 +++++++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/tokio/src/runtime/task/abort.rs b/tokio/src/runtime/task/abort.rs index 2745b56020c..899f54894db 100644 --- a/tokio/src/runtime/task/abort.rs +++ b/tokio/src/runtime/task/abort.rs @@ -102,3 +102,11 @@ impl Drop for AbortHandle { self.raw.drop_abort_handle(); } } + +impl Clone for AbortHandle { + /// Returns a cloned `AbortHandle` that can be used to remotely abort this task. + fn clone(&self) -> Self { + self.raw.ref_inc(); + Self::new(self.raw) + } +} diff --git a/tokio/src/runtime/tests/task.rs b/tokio/src/runtime/tests/task.rs index a0604505ccc..fc1e4089070 100644 --- a/tokio/src/runtime/tests/task.rs +++ b/tokio/src/runtime/tests/task.rs @@ -119,6 +119,29 @@ fn drop_abort_handle2() { handle.assert_dropped(); } +#[test] +fn drop_abort_handle_clone() { + let (ad, handle) = AssertDrop::new(); + let (notified, join) = unowned( + async { + drop(ad); + unreachable!() + }, + NoopSchedule, + Id::next(), + ); + let abort = join.abort_handle(); + let abort_clone = abort.clone(); + drop(join); + handle.assert_not_dropped(); + drop(notified); + handle.assert_not_dropped(); + drop(abort); + handle.assert_not_dropped(); + drop(abort_clone); + handle.assert_dropped(); +} + // Shutting down through Notified works #[test] fn create_shutdown1() { From 833ee027d0ec44d88765157ec98b6809f0070169 Mon Sep 17 00:00:00 2001 From: Hai-Hsin Date: Fri, 7 Jun 2024 19:48:56 +0800 Subject: [PATCH 040/119] macros: allow `unhandled_panic` behavior for `#[tokio::main]` and `#[tokio::test]` (#6593) --- .../tests/fail/macros_invalid_input.rs | 3 + .../tests/fail/macros_invalid_input.stderr | 62 +++++++------ tokio-macros/src/entry.rs | 75 ++++++++++++++- tokio-macros/src/lib.rs | 93 +++++++++++++++++++ tokio/tests/macros_test.rs | 24 +++++ 5 files changed, 226 insertions(+), 31 deletions(-) diff --git a/tests-build/tests/fail/macros_invalid_input.rs b/tests-build/tests/fail/macros_invalid_input.rs index 85b4924f225..425b274ff7f 100644 --- a/tests-build/tests/fail/macros_invalid_input.rs +++ b/tests-build/tests/fail/macros_invalid_input.rs @@ -41,6 +41,9 @@ async fn test_crate_not_path_int() {} #[tokio::test(crate = "456")] async fn test_crate_not_path_invalid() {} +#[tokio::test(flavor = "multi_thread", unhandled_panic = "shutdown_runtime")] +async fn test_multi_thread_with_unhandled_panic() {} + #[tokio::test] #[test] async fn test_has_second_test_attr() {} diff --git a/tests-build/tests/fail/macros_invalid_input.stderr b/tests-build/tests/fail/macros_invalid_input.stderr index 11f95315cdf..e6e80e8114a 100644 --- a/tests-build/tests/fail/macros_invalid_input.stderr +++ b/tests-build/tests/fail/macros_invalid_input.stderr @@ -1,115 +1,121 @@ error: the `async` keyword is missing from the function declaration - --> $DIR/macros_invalid_input.rs:6:1 + --> tests/fail/macros_invalid_input.rs:6:1 | 6 | fn main_is_not_async() {} | ^^ -error: Unknown attribute foo is specified; expected one of: `flavor`, `worker_threads`, `start_paused`, `crate` - --> $DIR/macros_invalid_input.rs:8:15 +error: Unknown attribute foo is specified; expected one of: `flavor`, `worker_threads`, `start_paused`, `crate`, `unhandled_panic`. + --> tests/fail/macros_invalid_input.rs:8:15 | 8 | #[tokio::main(foo)] | ^^^ error: Must have specified ident - --> $DIR/macros_invalid_input.rs:11:15 + --> tests/fail/macros_invalid_input.rs:11:15 | 11 | #[tokio::main(threadpool::bar)] | ^^^^^^^^^^^^^^^ error: the `async` keyword is missing from the function declaration - --> $DIR/macros_invalid_input.rs:15:1 + --> tests/fail/macros_invalid_input.rs:15:1 | 15 | fn test_is_not_async() {} | ^^ -error: Unknown attribute foo is specified; expected one of: `flavor`, `worker_threads`, `start_paused`, `crate` - --> $DIR/macros_invalid_input.rs:17:15 +error: Unknown attribute foo is specified; expected one of: `flavor`, `worker_threads`, `start_paused`, `crate`, `unhandled_panic`. + --> tests/fail/macros_invalid_input.rs:17:15 | 17 | #[tokio::test(foo)] | ^^^ -error: Unknown attribute foo is specified; expected one of: `flavor`, `worker_threads`, `start_paused`, `crate` - --> $DIR/macros_invalid_input.rs:20:15 +error: Unknown attribute foo is specified; expected one of: `flavor`, `worker_threads`, `start_paused`, `crate`, `unhandled_panic` + --> tests/fail/macros_invalid_input.rs:20:15 | 20 | #[tokio::test(foo = 123)] | ^^^^^^^^^ error: Failed to parse value of `flavor` as string. - --> $DIR/macros_invalid_input.rs:23:24 + --> tests/fail/macros_invalid_input.rs:23:24 | 23 | #[tokio::test(flavor = 123)] | ^^^ error: No such runtime flavor `foo`. The runtime flavors are `current_thread` and `multi_thread`. - --> $DIR/macros_invalid_input.rs:26:24 + --> tests/fail/macros_invalid_input.rs:26:24 | 26 | #[tokio::test(flavor = "foo")] | ^^^^^ error: The `start_paused` option requires the `current_thread` runtime flavor. Use `#[tokio::test(flavor = "current_thread")]` - --> $DIR/macros_invalid_input.rs:29:55 + --> tests/fail/macros_invalid_input.rs:29:55 | 29 | #[tokio::test(flavor = "multi_thread", start_paused = false)] | ^^^^^ error: Failed to parse value of `worker_threads` as integer. - --> $DIR/macros_invalid_input.rs:32:57 + --> tests/fail/macros_invalid_input.rs:32:57 | 32 | #[tokio::test(flavor = "multi_thread", worker_threads = "foo")] | ^^^^^ error: The `worker_threads` option requires the `multi_thread` runtime flavor. Use `#[tokio::test(flavor = "multi_thread")]` - --> $DIR/macros_invalid_input.rs:35:59 + --> tests/fail/macros_invalid_input.rs:35:59 | 35 | #[tokio::test(flavor = "current_thread", worker_threads = 4)] | ^ error: Failed to parse value of `crate` as path. - --> $DIR/macros_invalid_input.rs:38:23 + --> tests/fail/macros_invalid_input.rs:38:23 | 38 | #[tokio::test(crate = 456)] | ^^^ error: Failed to parse value of `crate` as path: "456" - --> $DIR/macros_invalid_input.rs:41:23 + --> tests/fail/macros_invalid_input.rs:41:23 | 41 | #[tokio::test(crate = "456")] | ^^^^^ +error: The `unhandled_panic` option requires the `current_thread` runtime flavor. Use `#[tokio::test(flavor = "current_thread")]` + --> tests/fail/macros_invalid_input.rs:44:58 + | +44 | #[tokio::test(flavor = "multi_thread", unhandled_panic = "shutdown_runtime")] + | ^^^^^^^^^^^^^^^^^^ + error: second test attribute is supplied, consider removing or changing the order of your test attributes - --> $DIR/macros_invalid_input.rs:45:1 + --> tests/fail/macros_invalid_input.rs:48:1 | -45 | #[test] +48 | #[test] | ^^^^^^^ error: second test attribute is supplied, consider removing or changing the order of your test attributes - --> $DIR/macros_invalid_input.rs:49:1 + --> tests/fail/macros_invalid_input.rs:52:1 | -49 | #[::core::prelude::v1::test] +52 | #[::core::prelude::v1::test] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: second test attribute is supplied, consider removing or changing the order of your test attributes - --> $DIR/macros_invalid_input.rs:53:1 + --> tests/fail/macros_invalid_input.rs:56:1 | -53 | #[core::prelude::rust_2015::test] +56 | #[core::prelude::rust_2015::test] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: second test attribute is supplied, consider removing or changing the order of your test attributes - --> $DIR/macros_invalid_input.rs:57:1 + --> tests/fail/macros_invalid_input.rs:60:1 | -57 | #[::std::prelude::rust_2018::test] +60 | #[::std::prelude::rust_2018::test] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: second test attribute is supplied, consider removing or changing the order of your test attributes - --> $DIR/macros_invalid_input.rs:61:1 + --> tests/fail/macros_invalid_input.rs:64:1 | -61 | #[std::prelude::rust_2021::test] +64 | #[std::prelude::rust_2021::test] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: second test attribute is supplied, consider removing or changing the order of your test attributes - --> $DIR/macros_invalid_input.rs:64:1 + --> tests/fail/macros_invalid_input.rs:67:1 | -64 | #[tokio::test] +67 | #[tokio::test] | ^^^^^^^^^^^^^^ | = note: this error originates in the attribute macro `tokio::test` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/tokio-macros/src/entry.rs b/tokio-macros/src/entry.rs index 8858c8a1674..acdc2610f44 100644 --- a/tokio-macros/src/entry.rs +++ b/tokio-macros/src/entry.rs @@ -25,11 +25,37 @@ impl RuntimeFlavor { } } +#[derive(Clone, Copy, PartialEq)] +enum UnhandledPanic { + Ignore, + ShutdownRuntime, +} + +impl UnhandledPanic { + fn from_str(s: &str) -> Result { + match s { + "ignore" => Ok(UnhandledPanic::Ignore), + "shutdown_runtime" => Ok(UnhandledPanic::ShutdownRuntime), + _ => Err(format!("No such unhandled panic behavior `{}`. The unhandled panic behaviors are `ignore` and `shutdown_runtime`.", s)), + } + } + + fn into_tokens(self, crate_path: &TokenStream) -> TokenStream { + match self { + UnhandledPanic::Ignore => quote! { #crate_path::runtime::UnhandledPanic::Ignore }, + UnhandledPanic::ShutdownRuntime => { + quote! { #crate_path::runtime::UnhandledPanic::ShutdownRuntime } + } + } + } +} + struct FinalConfig { flavor: RuntimeFlavor, worker_threads: Option, start_paused: Option, crate_name: Option, + unhandled_panic: Option, } /// Config used in case of the attribute not being able to build a valid config @@ -38,6 +64,7 @@ const DEFAULT_ERROR_CONFIG: FinalConfig = FinalConfig { worker_threads: None, start_paused: None, crate_name: None, + unhandled_panic: None, }; struct Configuration { @@ -48,6 +75,7 @@ struct Configuration { start_paused: Option<(bool, Span)>, is_test: bool, crate_name: Option, + unhandled_panic: Option<(UnhandledPanic, Span)>, } impl Configuration { @@ -63,6 +91,7 @@ impl Configuration { start_paused: None, is_test, crate_name: None, + unhandled_panic: None, } } @@ -117,6 +146,25 @@ impl Configuration { Ok(()) } + fn set_unhandled_panic( + &mut self, + unhandled_panic: syn::Lit, + span: Span, + ) -> Result<(), syn::Error> { + if self.unhandled_panic.is_some() { + return Err(syn::Error::new( + span, + "`unhandled_panic` set multiple times.", + )); + } + + let unhandled_panic = parse_string(unhandled_panic, span, "unhandled_panic")?; + let unhandled_panic = + UnhandledPanic::from_str(&unhandled_panic).map_err(|err| syn::Error::new(span, err))?; + self.unhandled_panic = Some((unhandled_panic, span)); + Ok(()) + } + fn macro_name(&self) -> &'static str { if self.is_test { "tokio::test" @@ -163,11 +211,24 @@ impl Configuration { (_, None) => None, }; + let unhandled_panic = match (flavor, self.unhandled_panic) { + (F::Threaded, Some((_, unhandled_panic_span))) => { + let msg = format!( + "The `unhandled_panic` option requires the `current_thread` runtime flavor. Use `#[{}(flavor = \"current_thread\")]`", + self.macro_name(), + ); + return Err(syn::Error::new(unhandled_panic_span, msg)); + } + (F::CurrentThread, Some((unhandled_panic, _))) => Some(unhandled_panic), + (_, None) => None, + }; + Ok(FinalConfig { crate_name: self.crate_name.clone(), flavor, worker_threads, start_paused, + unhandled_panic, }) } } @@ -275,9 +336,13 @@ fn build_config( "crate" => { config.set_crate_name(lit.clone(), syn::spanned::Spanned::span(lit))?; } + "unhandled_panic" => { + config + .set_unhandled_panic(lit.clone(), syn::spanned::Spanned::span(lit))?; + } name => { let msg = format!( - "Unknown attribute {} is specified; expected one of: `flavor`, `worker_threads`, `start_paused`, `crate`", + "Unknown attribute {} is specified; expected one of: `flavor`, `worker_threads`, `start_paused`, `crate`, `unhandled_panic`", name, ); return Err(syn::Error::new_spanned(namevalue, msg)); @@ -303,11 +368,11 @@ fn build_config( macro_name ) } - "flavor" | "worker_threads" | "start_paused" => { + "flavor" | "worker_threads" | "start_paused" | "crate" | "unhandled_panic" => { format!("The `{}` attribute requires an argument.", name) } name => { - format!("Unknown attribute {} is specified; expected one of: `flavor`, `worker_threads`, `start_paused`, `crate`", name) + format!("Unknown attribute {} is specified; expected one of: `flavor`, `worker_threads`, `start_paused`, `crate`, `unhandled_panic`.", name) } }; return Err(syn::Error::new_spanned(path, msg)); @@ -359,6 +424,10 @@ fn parse_knobs(mut input: ItemFn, is_test: bool, config: FinalConfig) -> TokenSt if let Some(v) = config.start_paused { rt = quote_spanned! {last_stmt_start_span=> #rt.start_paused(#v) }; } + if let Some(v) = config.unhandled_panic { + let unhandled_panic = v.into_tokens(&crate_path); + rt = quote_spanned! {last_stmt_start_span=> #rt.unhandled_panic(#unhandled_panic) }; + } let generated_attrs = if is_test { quote! { diff --git a/tokio-macros/src/lib.rs b/tokio-macros/src/lib.rs index c108d8c46a2..860a0929952 100644 --- a/tokio-macros/src/lib.rs +++ b/tokio-macros/src/lib.rs @@ -202,6 +202,52 @@ use proc_macro::TokenStream; /// }) /// } /// ``` +/// +/// ### Configure unhandled panic behavior +/// +/// Available options are `shutdown_runtime` and `ignore`. For more details, see +/// [`Builder::unhandled_panic`]. +/// +/// This option is only compatible with the `current_thread` runtime. +/// +/// ```no_run +/// #[cfg(tokio_unstable)] +/// #[tokio::main(flavor = "current_thread", unhandled_panic = "shutdown_runtime")] +/// async fn main() { +/// let _ = tokio::spawn(async { +/// panic!("This panic will shutdown the runtime."); +/// }).await; +/// } +/// # #[cfg(not(tokio_unstable))] +/// # fn main() { } +/// ``` +/// +/// Equivalent code not using `#[tokio::main]` +/// +/// ```no_run +/// #[cfg(tokio_unstable)] +/// fn main() { +/// tokio::runtime::Builder::new_current_thread() +/// .enable_all() +/// .unhandled_panic(UnhandledPanic::ShutdownRuntime) +/// .build() +/// .unwrap() +/// .block_on(async { +/// let _ = tokio::spawn(async { +/// panic!("This panic will shutdown the runtime."); +/// }).await; +/// }) +/// } +/// # #[cfg(not(tokio_unstable))] +/// # fn main() { } +/// ``` +/// +/// **Note**: This option depends on Tokio's [unstable API][unstable]. See [the +/// documentation on unstable features][unstable] for details on how to enable +/// Tokio's unstable features. +/// +/// [`Builder::unhandled_panic`]: ../tokio/runtime/struct.Builder.html#method.unhandled_panic +/// [unstable]: ../tokio/index.html#unstable-features #[proc_macro_attribute] pub fn main(args: TokenStream, item: TokenStream) -> TokenStream { entry::main(args.into(), item.into(), true).into() @@ -423,6 +469,53 @@ pub fn main_rt(args: TokenStream, item: TokenStream) -> TokenStream { /// println!("Hello world"); /// } /// ``` +/// +/// ### Configure unhandled panic behavior +/// +/// Available options are `shutdown_runtime` and `ignore`. For more details, see +/// [`Builder::unhandled_panic`]. +/// +/// This option is only compatible with the `current_thread` runtime. +/// +/// ```no_run +/// #[cfg(tokio_unstable)] +/// #[tokio::test(flavor = "current_thread", unhandled_panic = "shutdown_runtime")] +/// async fn my_test() { +/// let _ = tokio::spawn(async { +/// panic!("This panic will shutdown the runtime."); +/// }).await; +/// } +/// # #[cfg(not(tokio_unstable))] +/// # fn main() { } +/// ``` +/// +/// Equivalent code not using `#[tokio::test]` +/// +/// ```no_run +/// #[cfg(tokio_unstable)] +/// #[test] +/// fn my_test() { +/// tokio::runtime::Builder::new_current_thread() +/// .enable_all() +/// .unhandled_panic(UnhandledPanic::ShutdownRuntime) +/// .build() +/// .unwrap() +/// .block_on(async { +/// let _ = tokio::spawn(async { +/// panic!("This panic will shutdown the runtime."); +/// }).await; +/// }) +/// } +/// # #[cfg(not(tokio_unstable))] +/// # fn main() { } +/// ``` +/// +/// **Note**: This option depends on Tokio's [unstable API][unstable]. See [the +/// documentation on unstable features][unstable] for details on how to enable +/// Tokio's unstable features. +/// +/// [`Builder::unhandled_panic`]: ../tokio/runtime/struct.Builder.html#method.unhandled_panic +/// [unstable]: ../tokio/index.html#unstable-features #[proc_macro_attribute] pub fn test(args: TokenStream, item: TokenStream) -> TokenStream { entry::test(args.into(), item.into(), true).into() diff --git a/tokio/tests/macros_test.rs b/tokio/tests/macros_test.rs index 69ee30b36ce..bed443cf293 100644 --- a/tokio/tests/macros_test.rs +++ b/tokio/tests/macros_test.rs @@ -1,3 +1,4 @@ +#![allow(unknown_lints, unexpected_cfgs)] #![cfg(all(feature = "full", not(target_os = "wasi")))] // Wasi doesn't support threading use tokio::test; @@ -92,3 +93,26 @@ pub mod issue_5243 { async fn foo() {} ); } + +#[cfg(tokio_unstable)] +pub mod macro_rt_arg_unhandled_panic { + use tokio_test::assert_err; + + #[tokio::test(flavor = "current_thread", unhandled_panic = "shutdown_runtime")] + #[should_panic] + async fn unhandled_panic_shutdown_runtime() { + let _ = tokio::spawn(async { + panic!("This panic should shutdown the runtime."); + }) + .await; + } + + #[tokio::test(flavor = "current_thread", unhandled_panic = "ignore")] + async fn unhandled_panic_ignore() { + let rt = tokio::spawn(async { + panic!("This panic should be forwarded to rt as an error."); + }) + .await; + assert_err!(rt); + } +} From 53b586c5b9ca7805a1c66994962c62d874352590 Mon Sep 17 00:00:00 2001 From: Rob Ede Date: Sat, 8 Jun 2024 21:17:06 +0100 Subject: [PATCH 041/119] task: stabilize `consume_budget` (#6622) --- tokio/src/task/consume_budget.rs | 7 +------ tokio/src/task/mod.rs | 6 ++---- 2 files changed, 3 insertions(+), 10 deletions(-) diff --git a/tokio/src/task/consume_budget.rs b/tokio/src/task/consume_budget.rs index e7432ffe7d1..1e398d73b2a 100644 --- a/tokio/src/task/consume_budget.rs +++ b/tokio/src/task/consume_budget.rs @@ -8,10 +8,6 @@ use std::task::Poll; /// computations that do not use Tokio resources like sockets or semaphores, /// without redundantly yielding to the runtime each time. /// -/// **Note**: This is an [unstable API][unstable]. The public API of this type -/// may break in 1.x releases. See [the documentation on unstable -/// features][unstable] for details. -/// /// # Examples /// /// Make sure that a function which returns a sum of (potentially lots of) @@ -27,8 +23,7 @@ use std::task::Poll; /// sum /// } /// ``` -/// [unstable]: crate#unstable-features -#[cfg_attr(docsrs, doc(cfg(all(tokio_unstable, feature = "rt"))))] +#[cfg_attr(docsrs, doc(cfg(feature = "rt")))] pub async fn consume_budget() { let mut status = Poll::Pending; diff --git a/tokio/src/task/mod.rs b/tokio/src/task/mod.rs index 0678aa3af7b..05d95d2d5c5 100644 --- a/tokio/src/task/mod.rs +++ b/tokio/src/task/mod.rs @@ -337,10 +337,8 @@ cfg_rt! { mod yield_now; pub use yield_now::yield_now; - cfg_unstable! { - mod consume_budget; - pub use consume_budget::consume_budget; - } + mod consume_budget; + pub use consume_budget::consume_budget; mod local; pub use local::{spawn_local, LocalSet, LocalEnterGuard}; From 341b5daa6e4592d285674de4eb116c928fc9f29c Mon Sep 17 00:00:00 2001 From: Conrad Ludgate Date: Sun, 9 Jun 2024 11:25:54 +0100 Subject: [PATCH 042/119] metrics: add `spawned_tasks_count`, rename `active_tasks_count` (#6114) --- tokio/src/runtime/metrics/runtime.rs | 38 +++++++++++- .../runtime/scheduler/current_thread/mod.rs | 4 ++ tokio/src/runtime/scheduler/mod.rs | 4 ++ .../scheduler/multi_thread/handle/metrics.rs | 4 ++ .../multi_thread_alt/handle/metrics.rs | 4 ++ tokio/src/runtime/task/list.rs | 4 ++ tokio/src/util/sharded_list.rs | 11 ++++ tokio/tests/rt_metrics.rs | 58 ++++++++++++++++--- 8 files changed, 115 insertions(+), 12 deletions(-) diff --git a/tokio/src/runtime/metrics/runtime.rs b/tokio/src/runtime/metrics/runtime.rs index 8d30f66f6ff..f3e02a2a602 100644 --- a/tokio/src/runtime/metrics/runtime.rs +++ b/tokio/src/runtime/metrics/runtime.rs @@ -75,7 +75,15 @@ impl RuntimeMetrics { self.handle.inner.num_blocking_threads() } - /// Returns the number of active tasks in the runtime. + #[deprecated = "Renamed to num_active_tasks"] + /// Renamed to [`RuntimeMetrics::num_active_tasks`] + pub fn active_tasks_count(&self) -> usize { + self.num_active_tasks() + } + + /// Returns the current number of active tasks in the runtime. + /// + /// This value increases and decreases over time as tasks are spawned and as they are completed or cancelled. /// /// # Examples /// @@ -86,14 +94,38 @@ impl RuntimeMetrics { /// async fn main() { /// let metrics = Handle::current().metrics(); /// - /// let n = metrics.active_tasks_count(); + /// let n = metrics.num_active_tasks(); /// println!("Runtime has {} active tasks", n); /// } /// ``` - pub fn active_tasks_count(&self) -> usize { + pub fn num_active_tasks(&self) -> usize { self.handle.inner.active_tasks_count() } + /// Returns the number of tasks spawned in this runtime since it was created. + /// + /// This count starts at zero when the runtime is created and increases by one each time a task is spawned. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.spawned_tasks_count(); + /// println!("Runtime has had {} tasks spawned", n); + /// } + /// ``` + pub fn spawned_tasks_count(&self) -> u64 { + self.handle.inner.spawned_tasks_count() + } + /// Returns the number of idle threads, which have spawned by the runtime /// for `spawn_blocking` calls. /// diff --git a/tokio/src/runtime/scheduler/current_thread/mod.rs b/tokio/src/runtime/scheduler/current_thread/mod.rs index b9c23837a58..805b92a818d 100644 --- a/tokio/src/runtime/scheduler/current_thread/mod.rs +++ b/tokio/src/runtime/scheduler/current_thread/mod.rs @@ -536,6 +536,10 @@ cfg_unstable_metrics! { pub(crate) fn active_tasks_count(&self) -> usize { self.shared.owned.active_tasks_count() } + + pub(crate) fn spawned_tasks_count(&self) -> u64 { + self.shared.owned.spawned_tasks_count() + } } } diff --git a/tokio/src/runtime/scheduler/mod.rs b/tokio/src/runtime/scheduler/mod.rs index 3cbba11b752..97d9ca6ba17 100644 --- a/tokio/src/runtime/scheduler/mod.rs +++ b/tokio/src/runtime/scheduler/mod.rs @@ -191,6 +191,10 @@ cfg_rt! { match_flavor!(self, Handle(handle) => handle.active_tasks_count()) } + pub(crate) fn spawned_tasks_count(&self) -> u64 { + match_flavor!(self, Handle(handle) => handle.spawned_tasks_count()) + } + pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { match_flavor!(self, Handle(handle) => handle.scheduler_metrics()) } diff --git a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs index 6ced245ee5b..b1c5bb29f96 100644 --- a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs +++ b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs @@ -25,6 +25,10 @@ impl Handle { self.shared.owned.active_tasks_count() } + pub(crate) fn spawned_tasks_count(&self) -> u64 { + self.shared.owned.spawned_tasks_count() + } + pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { &self.shared.scheduler_metrics } diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs b/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs index 3d614b478c5..38d9f4b1cc6 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs @@ -22,6 +22,10 @@ impl Handle { self.shared.owned.active_tasks_count() } + pub(crate) fn spawned_tasks_count(&self) -> u64 { + self.shared.owned.spawned_tasks_count() + } + pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { &self.shared.scheduler_metrics } diff --git a/tokio/src/runtime/task/list.rs b/tokio/src/runtime/task/list.rs index 41a5fb439c9..5f91cc83da9 100644 --- a/tokio/src/runtime/task/list.rs +++ b/tokio/src/runtime/task/list.rs @@ -170,6 +170,10 @@ impl OwnedTasks { self.list.len() } + pub(crate) fn spawned_tasks_count(&self) -> u64 { + self.list.added() + } + pub(crate) fn remove(&self, task: &Task) -> Option> { // If the task's owner ID is `None` then it is not part of any list and // doesn't need removing. diff --git a/tokio/src/util/sharded_list.rs b/tokio/src/util/sharded_list.rs index 4da0bcdf7f1..46c34f14133 100644 --- a/tokio/src/util/sharded_list.rs +++ b/tokio/src/util/sharded_list.rs @@ -1,6 +1,7 @@ use std::ptr::NonNull; use std::sync::atomic::Ordering; +use crate::loom::sync::atomic::AtomicU64; use crate::loom::sync::{Mutex, MutexGuard}; use std::sync::atomic::AtomicUsize; @@ -14,6 +15,7 @@ use super::linked_list::{Link, LinkedList}; /// Note: Due to its inner sharded design, the order of nodes cannot be guaranteed. pub(crate) struct ShardedList { lists: Box<[Mutex>]>, + added: AtomicU64, count: AtomicUsize, shard_mask: usize, } @@ -42,6 +44,7 @@ impl ShardedList { } Self { lists: lists.into_boxed_slice(), + added: AtomicU64::new(0), count: AtomicUsize::new(0), shard_mask, } @@ -51,6 +54,7 @@ impl ShardedList { /// Used to get the lock of shard. pub(crate) struct ShardGuard<'a, L, T> { lock: MutexGuard<'a, LinkedList>, + added: &'a AtomicU64, count: &'a AtomicUsize, id: usize, } @@ -92,6 +96,7 @@ impl ShardedList { let id = unsafe { L::get_shard_id(L::as_raw(val)) }; ShardGuard { lock: self.shard_inner(id), + added: &self.added, count: &self.count, id, } @@ -102,6 +107,11 @@ impl ShardedList { self.count.load(Ordering::Relaxed) } + /// Gets the total number of elements added to this list. + pub(crate) fn added(&self) -> u64 { + self.added.load(Ordering::Relaxed) + } + /// Returns whether the linked list does not contain any node. pub(crate) fn is_empty(&self) -> bool { self.len() == 0 @@ -127,6 +137,7 @@ impl<'a, L: ShardedListItem> ShardGuard<'a, L, L::Target> { let id = unsafe { L::get_shard_id(L::as_raw(&val)) }; assert_eq!(id, self.id); self.lock.push_front(val); + self.added.fetch_add(1, Ordering::Relaxed); self.count.fetch_add(1, Ordering::Relaxed); } } diff --git a/tokio/tests/rt_metrics.rs b/tokio/tests/rt_metrics.rs index 2446deb6b41..0680d7960a5 100644 --- a/tokio/tests/rt_metrics.rs +++ b/tokio/tests/rt_metrics.rs @@ -93,20 +93,60 @@ fn blocking_queue_depth() { } #[test] -fn active_tasks_count() { +fn num_active_tasks() { let rt = current_thread(); let metrics = rt.metrics(); - assert_eq!(0, metrics.active_tasks_count()); - rt.spawn(async move { - assert_eq!(1, metrics.active_tasks_count()); - }); + assert_eq!(0, metrics.num_active_tasks()); + rt.block_on(rt.spawn(async move { + assert_eq!(1, metrics.num_active_tasks()); + })) + .unwrap(); + + assert_eq!(0, rt.metrics().num_active_tasks()); let rt = threaded(); let metrics = rt.metrics(); - assert_eq!(0, metrics.active_tasks_count()); - rt.spawn(async move { - assert_eq!(1, metrics.active_tasks_count()); - }); + assert_eq!(0, metrics.num_active_tasks()); + rt.block_on(rt.spawn(async move { + assert_eq!(1, metrics.num_active_tasks()); + })) + .unwrap(); + + // try for 10 seconds to see if this eventually succeeds. + // wake_join() is called before the task is released, so in multithreaded + // code, this means we sometimes exit the block_on before the counter decrements. + for _ in 0..100 { + if rt.metrics().num_active_tasks() == 0 { + break; + } + std::thread::sleep(std::time::Duration::from_millis(100)); + } + assert_eq!(0, rt.metrics().num_active_tasks()); +} + +#[test] +fn spawned_tasks_count() { + let rt = current_thread(); + let metrics = rt.metrics(); + assert_eq!(0, metrics.spawned_tasks_count()); + + rt.block_on(rt.spawn(async move { + assert_eq!(1, metrics.spawned_tasks_count()); + })) + .unwrap(); + + assert_eq!(1, rt.metrics().spawned_tasks_count()); + + let rt = threaded(); + let metrics = rt.metrics(); + assert_eq!(0, metrics.spawned_tasks_count()); + + rt.block_on(rt.spawn(async move { + assert_eq!(1, metrics.spawned_tasks_count()); + })) + .unwrap(); + + assert_eq!(1, rt.metrics().spawned_tasks_count()); } #[test] From 17555d71d96ec45d02785e316317489dc8bba13f Mon Sep 17 00:00:00 2001 From: Marek Kuskowski <50183564+nylonicious@users.noreply.github.com> Date: Mon, 10 Jun 2024 10:44:45 +0200 Subject: [PATCH 043/119] sync: implement `Default` for `watch::Sender` (#6626) --- tokio/src/sync/watch.rs | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tokio/src/sync/watch.rs b/tokio/src/sync/watch.rs index 80d479300db..5810c67de60 100644 --- a/tokio/src/sync/watch.rs +++ b/tokio/src/sync/watch.rs @@ -156,6 +156,12 @@ impl Clone for Sender { } } +impl Default for Sender { + fn default() -> Self { + Self::new(T::default()) + } +} + /// Returns a reference to the inner value. /// /// Outstanding borrows hold a read lock on the inner value. This means that From 479f736935f3eadb2d902d8fb00b4e52a0a938f7 Mon Sep 17 00:00:00 2001 From: Niki C <51484888+inventednight@users.noreply.github.com> Date: Wed, 12 Jun 2024 12:09:59 -0400 Subject: [PATCH 044/119] io: improve panic message of `ReadBuf::put_slice()` (#6629) --- tokio/src/io/read_buf.rs | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tokio/src/io/read_buf.rs b/tokio/src/io/read_buf.rs index 283d96e3095..ec53ea7a207 100644 --- a/tokio/src/io/read_buf.rs +++ b/tokio/src/io/read_buf.rs @@ -248,7 +248,9 @@ impl<'a> ReadBuf<'a> { pub fn put_slice(&mut self, buf: &[u8]) { assert!( self.remaining() >= buf.len(), - "buf.len() must fit in remaining()" + "buf.len() must fit in remaining(); buf.len() = {}, remaining() = {}", + buf.len(), + self.remaining() ); let amt = buf.len(); From a865ca139aa68328ee5accf27ba0181cd330de6d Mon Sep 17 00:00:00 2001 From: Weijia Jiang Date: Thu, 13 Jun 2024 14:50:28 +0800 Subject: [PATCH 045/119] rt: relaxed trait bounds for `LinkedList::into_guarded` (#6630) --- tokio/src/util/linked_list.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tokio/src/util/linked_list.rs b/tokio/src/util/linked_list.rs index 0274849b0c6..3650f87fbb0 100644 --- a/tokio/src/util/linked_list.rs +++ b/tokio/src/util/linked_list.rs @@ -351,7 +351,7 @@ feature! { _marker: PhantomData<*const L>, } - impl>> LinkedList { + impl LinkedList { /// Turns a linked list into the guarded version by linking the guard node /// with the head and tail nodes. Like with other nodes, you should guarantee /// that the guard node is pinned in memory. From 53ea44bfb9400ea6dbba52413c28a41284f290e9 Mon Sep 17 00:00:00 2001 From: Timo Date: Thu, 13 Jun 2024 10:58:45 +0200 Subject: [PATCH 046/119] sync: add `CancellationToken::run_until_cancelled` (#6618) --- tokio-util/src/sync/cancellation_token.rs | 46 ++++++++++++++++++++ tokio-util/tests/sync_cancellation_token.rs | 48 +++++++++++++++++++++ 2 files changed, 94 insertions(+) diff --git a/tokio-util/src/sync/cancellation_token.rs b/tokio-util/src/sync/cancellation_token.rs index 5ef8ba2447d..66fbf1a73e7 100644 --- a/tokio-util/src/sync/cancellation_token.rs +++ b/tokio-util/src/sync/cancellation_token.rs @@ -241,6 +241,52 @@ impl CancellationToken { pub fn drop_guard(self) -> DropGuard { DropGuard { inner: Some(self) } } + + /// Runs a future to completion and returns its result wrapped inside of an `Option` + /// unless the `CancellationToken` is cancelled. In that case the function returns + /// `None` and the future gets dropped. + /// + /// # Cancel safety + /// + /// This method is only cancel safe if `fut` is cancel safe. + pub async fn run_until_cancelled(&self, fut: F) -> Option + where + F: Future, + { + pin_project! { + /// A Future that is resolved once the corresponding [`CancellationToken`] + /// is cancelled or a given Future gets resolved. It is biased towards the + /// Future completion. + #[must_use = "futures do nothing unless polled"] + struct RunUntilCancelledFuture<'a, F: Future> { + #[pin] + cancellation: WaitForCancellationFuture<'a>, + #[pin] + future: F, + } + } + + impl<'a, F: Future> Future for RunUntilCancelledFuture<'a, F> { + type Output = Option; + + fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + let this = self.project(); + if let Poll::Ready(res) = this.future.poll(cx) { + Poll::Ready(Some(res)) + } else if this.cancellation.poll(cx).is_ready() { + Poll::Ready(None) + } else { + Poll::Pending + } + } + } + + RunUntilCancelledFuture { + cancellation: self.cancelled(), + future: fut, + } + .await + } } // ===== impl WaitForCancellationFuture ===== diff --git a/tokio-util/tests/sync_cancellation_token.rs b/tokio-util/tests/sync_cancellation_token.rs index 279d74fdc67..db33114a2e3 100644 --- a/tokio-util/tests/sync_cancellation_token.rs +++ b/tokio-util/tests/sync_cancellation_token.rs @@ -1,6 +1,7 @@ #![warn(rust_2018_idioms)] use tokio::pin; +use tokio::sync::oneshot; use tokio_util::sync::{CancellationToken, WaitForCancellationFuture}; use core::future::Future; @@ -445,3 +446,50 @@ fn derives_send_sync() { assert_send::>(); assert_sync::>(); } + +#[test] +fn run_until_cancelled_test() { + let (waker, _) = new_count_waker(); + + { + let token = CancellationToken::new(); + + let fut = token.run_until_cancelled(std::future::pending::<()>()); + pin!(fut); + + assert_eq!( + Poll::Pending, + fut.as_mut().poll(&mut Context::from_waker(&waker)) + ); + + token.cancel(); + + assert_eq!( + Poll::Ready(None), + fut.as_mut().poll(&mut Context::from_waker(&waker)) + ); + } + + { + let (tx, rx) = oneshot::channel::<()>(); + + let token = CancellationToken::new(); + let fut = token.run_until_cancelled(async move { + rx.await.unwrap(); + 42 + }); + pin!(fut); + + assert_eq!( + Poll::Pending, + fut.as_mut().poll(&mut Context::from_waker(&waker)) + ); + + tx.send(()).unwrap(); + + assert_eq!( + Poll::Ready(Some(42)), + fut.as_mut().poll(&mut Context::from_waker(&waker)) + ); + } +} From 8480a180e6ffdd0ec0ec213a9bebcda2445fc541 Mon Sep 17 00:00:00 2001 From: Weijia Jiang Date: Fri, 14 Jun 2024 17:03:47 +0800 Subject: [PATCH 047/119] time: avoid traversing entries in the time wheel twice (#6584) --- tokio/src/runtime/time/entry.rs | 99 +++---------- tokio/src/runtime/time/mod.rs | 60 ++++++-- tokio/src/runtime/time/wheel/level.rs | 22 +-- tokio/src/runtime/time/wheel/mod.rs | 193 ++++++++++++++------------ tokio/src/util/linked_list.rs | 1 + 5 files changed, 185 insertions(+), 190 deletions(-) diff --git a/tokio/src/runtime/time/entry.rs b/tokio/src/runtime/time/entry.rs index 834077caa3d..0bd15a74f8b 100644 --- a/tokio/src/runtime/time/entry.rs +++ b/tokio/src/runtime/time/entry.rs @@ -21,9 +21,8 @@ //! //! Each timer has a state field associated with it. This field contains either //! the current scheduled time, or a special flag value indicating its state. -//! This state can either indicate that the timer is on the 'pending' queue (and -//! thus will be fired with an `Ok(())` result soon) or that it has already been -//! fired/deregistered. +//! This state can either indicate that the timer is firing (and thus will be fired +//! with an `Ok(())` result soon) or that it has already been fired/deregistered. //! //! This single state field allows for code that is firing the timer to //! synchronize with any racing `reset` calls reliably. @@ -49,10 +48,10 @@ //! There is of course a race condition between timer reset and timer //! expiration. If the driver fails to observe the updated expiration time, it //! could trigger expiration of the timer too early. However, because -//! [`mark_pending`][mark_pending] performs a compare-and-swap, it will identify this race and -//! refuse to mark the timer as pending. +//! [`mark_firing`][mark_firing] performs a compare-and-swap, it will identify this race and +//! refuse to mark the timer as firing. //! -//! [mark_pending]: TimerHandle::mark_pending +//! [mark_firing]: TimerHandle::mark_firing use crate::loom::cell::UnsafeCell; use crate::loom::sync::atomic::AtomicU64; @@ -70,9 +69,9 @@ use std::{marker::PhantomPinned, pin::Pin, ptr::NonNull}; type TimerResult = Result<(), crate::time::error::Error>; -const STATE_DEREGISTERED: u64 = u64::MAX; -const STATE_PENDING_FIRE: u64 = STATE_DEREGISTERED - 1; -const STATE_MIN_VALUE: u64 = STATE_PENDING_FIRE; +pub(super) const STATE_DEREGISTERED: u64 = u64::MAX; +const STATE_FIRING: u64 = STATE_DEREGISTERED - 1; +const STATE_MIN_VALUE: u64 = STATE_FIRING; /// The largest safe integer to use for ticks. /// /// This value should be updated if any other signal values are added above. @@ -123,10 +122,6 @@ impl StateCell { } } - fn is_pending(&self) -> bool { - self.state.load(Ordering::Relaxed) == STATE_PENDING_FIRE - } - /// Returns the current expiration time, or None if not currently scheduled. fn when(&self) -> Option { let cur_state = self.state.load(Ordering::Relaxed); @@ -162,26 +157,28 @@ impl StateCell { } } - /// Marks this timer as being moved to the pending list, if its scheduled - /// time is not after `not_after`. + /// Marks this timer firing, if its scheduled time is not after `not_after`. /// /// If the timer is scheduled for a time after `not_after`, returns an Err /// containing the current scheduled time. /// /// SAFETY: Must hold the driver lock. - unsafe fn mark_pending(&self, not_after: u64) -> Result<(), u64> { + unsafe fn mark_firing(&self, not_after: u64) -> Result<(), u64> { // Quick initial debug check to see if the timer is already fired. Since // firing the timer can only happen with the driver lock held, we know // we shouldn't be able to "miss" a transition to a fired state, even // with relaxed ordering. let mut cur_state = self.state.load(Ordering::Relaxed); - loop { + // Because its state is STATE_DEREGISTERED, it has been fired. + if cur_state == STATE_DEREGISTERED { + break Err(cur_state); + } // improve the error message for things like // https://github.com/tokio-rs/tokio/issues/3675 assert!( cur_state < STATE_MIN_VALUE, - "mark_pending called when the timer entry is in an invalid state" + "mark_firing called when the timer entry is in an invalid state" ); if cur_state > not_after { @@ -190,7 +187,7 @@ impl StateCell { match self.state.compare_exchange_weak( cur_state, - STATE_PENDING_FIRE, + STATE_FIRING, Ordering::AcqRel, Ordering::Acquire, ) { @@ -337,11 +334,6 @@ pub(crate) struct TimerShared { /// Only accessed under the entry lock. pointers: linked_list::Pointers, - /// The expiration time for which this entry is currently registered. - /// Generally owned by the driver, but is accessed by the entry when not - /// registered. - cached_when: AtomicU64, - /// Current state. This records whether the timer entry is currently under /// the ownership of the driver, and if not, its current state (not /// complete, fired, error, etc). @@ -356,7 +348,6 @@ unsafe impl Sync for TimerShared {} impl std::fmt::Debug for TimerShared { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { f.debug_struct("TimerShared") - .field("cached_when", &self.cached_when.load(Ordering::Relaxed)) .field("state", &self.state) .finish() } @@ -374,40 +365,12 @@ impl TimerShared { pub(super) fn new(shard_id: u32) -> Self { Self { shard_id, - cached_when: AtomicU64::new(0), pointers: linked_list::Pointers::new(), state: StateCell::default(), _p: PhantomPinned, } } - /// Gets the cached time-of-expiration value. - pub(super) fn cached_when(&self) -> u64 { - // Cached-when is only accessed under the driver lock, so we can use relaxed - self.cached_when.load(Ordering::Relaxed) - } - - /// Gets the true time-of-expiration value, and copies it into the cached - /// time-of-expiration value. - /// - /// SAFETY: Must be called with the driver lock held, and when this entry is - /// not in any timer wheel lists. - pub(super) unsafe fn sync_when(&self) -> u64 { - let true_when = self.true_when(); - - self.cached_when.store(true_when, Ordering::Relaxed); - - true_when - } - - /// Sets the cached time-of-expiration value. - /// - /// SAFETY: Must be called with the driver lock held, and when this entry is - /// not in any timer wheel lists. - unsafe fn set_cached_when(&self, when: u64) { - self.cached_when.store(when, Ordering::Relaxed); - } - /// Returns the true time-of-expiration value, with relaxed memory ordering. pub(super) fn true_when(&self) -> u64 { self.state.when().expect("Timer already fired") @@ -420,7 +383,6 @@ impl TimerShared { /// in the timer wheel. pub(super) unsafe fn set_expiration(&self, t: u64) { self.state.set_expiration(t); - self.cached_when.store(t, Ordering::Relaxed); } /// Sets the true time-of-expiration only if it is after the current. @@ -590,16 +552,8 @@ impl TimerEntry { } impl TimerHandle { - pub(super) unsafe fn cached_when(&self) -> u64 { - unsafe { self.inner.as_ref().cached_when() } - } - - pub(super) unsafe fn sync_when(&self) -> u64 { - unsafe { self.inner.as_ref().sync_when() } - } - - pub(super) unsafe fn is_pending(&self) -> bool { - unsafe { self.inner.as_ref().state.is_pending() } + pub(super) unsafe fn true_when(&self) -> u64 { + unsafe { self.inner.as_ref().true_when() } } /// Forcibly sets the true and cached expiration times to the given tick. @@ -610,7 +564,7 @@ impl TimerHandle { self.inner.as_ref().set_expiration(tick); } - /// Attempts to mark this entry as pending. If the expiration time is after + /// Attempts to mark this entry as firing. If the expiration time is after /// `not_after`, however, returns an Err with the current expiration time. /// /// If an `Err` is returned, the `cached_when` value will be updated to this @@ -618,19 +572,8 @@ impl TimerHandle { /// /// SAFETY: The caller must ensure that the handle remains valid, the driver /// lock is held, and that the timer is not in any wheel linked lists. - /// After returning Ok, the entry must be added to the pending list. - pub(super) unsafe fn mark_pending(&self, not_after: u64) -> Result<(), u64> { - match self.inner.as_ref().state.mark_pending(not_after) { - Ok(()) => { - // mark this as being on the pending queue in cached_when - self.inner.as_ref().set_cached_when(u64::MAX); - Ok(()) - } - Err(tick) => { - self.inner.as_ref().set_cached_when(tick); - Err(tick) - } - } + pub(super) unsafe fn mark_firing(&self, not_after: u64) -> Result<(), u64> { + self.inner.as_ref().state.mark_firing(not_after) } /// Attempts to transition to a terminal state. If the state is already a diff --git a/tokio/src/runtime/time/mod.rs b/tokio/src/runtime/time/mod.rs index 37b04ef0000..f3174b33682 100644 --- a/tokio/src/runtime/time/mod.rs +++ b/tokio/src/runtime/time/mod.rs @@ -8,7 +8,7 @@ mod entry; pub(crate) use entry::TimerEntry; -use entry::{EntryList, TimerHandle, TimerShared, MAX_SAFE_MILLIS_DURATION}; +use entry::{EntryList, TimerHandle, TimerShared, MAX_SAFE_MILLIS_DURATION, STATE_DEREGISTERED}; mod handle; pub(crate) use self::handle::Handle; @@ -319,23 +319,53 @@ impl Handle { now = lock.elapsed(); } - while let Some(entry) = lock.poll(now) { - debug_assert!(unsafe { entry.is_pending() }); - - // SAFETY: We hold the driver lock, and just removed the entry from any linked lists. - if let Some(waker) = unsafe { entry.fire(Ok(())) } { - waker_list.push(waker); - - if !waker_list.can_push() { - // Wake a batch of wakers. To avoid deadlock, we must do this with the lock temporarily dropped. - drop(lock); - - waker_list.wake_all(); - - lock = self.inner.lock_sharded_wheel(id); + while let Some(expiration) = lock.poll(now) { + lock.set_elapsed(expiration.deadline); + // It is critical for `GuardedLinkedList` safety that the guard node is + // pinned in memory and is not dropped until the guarded list is dropped. + let guard = TimerShared::new(id); + pin!(guard); + let guard_handle = guard.as_ref().get_ref().handle(); + + // * This list will be still guarded by the lock of the Wheel with the specefied id. + // `EntryWaitersList` wrapper makes sure we hold the lock to modify it. + // * This wrapper will empty the list on drop. It is critical for safety + // that we will not leave any list entry with a pointer to the local + // guard node after this function returns / panics. + // Safety: The `TimerShared` inside this `TimerHandle` is pinned in the memory. + let mut list = unsafe { lock.get_waiters_list(&expiration, guard_handle, id, self) }; + + while let Some(entry) = list.pop_back_locked(&mut lock) { + let deadline = expiration.deadline; + // Try to expire the entry; this is cheap (doesn't synchronize) if + // the timer is not expired, and updates cached_when. + match unsafe { entry.mark_firing(deadline) } { + Ok(()) => { + // Entry was expired. + // SAFETY: We hold the driver lock, and just removed the entry from any linked lists. + if let Some(waker) = unsafe { entry.fire(Ok(())) } { + waker_list.push(waker); + + if !waker_list.can_push() { + // Wake a batch of wakers. To avoid deadlock, + // we must do this with the lock temporarily dropped. + drop(lock); + waker_list.wake_all(); + + lock = self.inner.lock_sharded_wheel(id); + } + } + } + Err(state) if state == STATE_DEREGISTERED => {} + Err(state) => { + // Safety: This Entry has not expired. + unsafe { lock.reinsert_entry(entry, deadline, state) }; + } } } + lock.occupied_bit_maintain(&expiration); } + let next_wake_up = lock.poll_at(); drop(lock); diff --git a/tokio/src/runtime/time/wheel/level.rs b/tokio/src/runtime/time/wheel/level.rs index d31eaf46879..6539f47b4fa 100644 --- a/tokio/src/runtime/time/wheel/level.rs +++ b/tokio/src/runtime/time/wheel/level.rs @@ -20,7 +20,6 @@ pub(crate) struct Level { } /// Indicates when a slot must be processed next. -#[derive(Debug)] pub(crate) struct Expiration { /// The level containing the slot. pub(crate) level: usize, @@ -81,7 +80,7 @@ impl Level { // pseudo-ring buffer, and we rotate around them indefinitely. If we // compute a deadline before now, and it's the top level, it // therefore means we're actually looking at a slot in the future. - debug_assert_eq!(self.level, super::NUM_LEVELS - 1); + debug_assert_eq!(self.level, super::MAX_LEVEL_INDEX); deadline += level_range; } @@ -120,7 +119,7 @@ impl Level { } pub(crate) unsafe fn add_entry(&mut self, item: TimerHandle) { - let slot = slot_for(item.cached_when(), self.level); + let slot = slot_for(item.true_when(), self.level); self.slot[slot].push_front(item); @@ -128,23 +127,26 @@ impl Level { } pub(crate) unsafe fn remove_entry(&mut self, item: NonNull) { - let slot = slot_for(unsafe { item.as_ref().cached_when() }, self.level); + let slot = slot_for(unsafe { item.as_ref().true_when() }, self.level); unsafe { self.slot[slot].remove(item) }; if self.slot[slot].is_empty() { - // The bit is currently set - debug_assert!(self.occupied & occupied_bit(slot) != 0); - // Unset the bit self.occupied ^= occupied_bit(slot); } } - pub(crate) fn take_slot(&mut self, slot: usize) -> EntryList { - self.occupied &= !occupied_bit(slot); - + pub(super) fn take_slot(&mut self, slot: usize) -> EntryList { std::mem::take(&mut self.slot[slot]) } + + pub(super) fn occupied_bit_maintain(&mut self, slot: usize) { + if self.slot[slot].is_empty() { + self.occupied &= !occupied_bit(slot); + } else { + self.occupied |= occupied_bit(slot); + } + } } impl fmt::Debug for Level { diff --git a/tokio/src/runtime/time/wheel/mod.rs b/tokio/src/runtime/time/wheel/mod.rs index f2b4228514c..a4034053134 100644 --- a/tokio/src/runtime/time/wheel/mod.rs +++ b/tokio/src/runtime/time/wheel/mod.rs @@ -1,5 +1,6 @@ use crate::runtime::time::{TimerHandle, TimerShared}; use crate::time::error::InsertError; +use crate::util::linked_list::{self, GuardedLinkedList, LinkedList}; mod level; pub(crate) use self::level::Expiration; @@ -7,7 +8,59 @@ use self::level::Level; use std::{array, ptr::NonNull}; -use super::EntryList; +use super::entry::MAX_SAFE_MILLIS_DURATION; +use super::Handle; + +/// List used in `Handle::process_at_sharded_time`. It wraps a guarded linked list +/// and gates the access to it on the lock of the `Wheel` with the specified `wheel_id`. +/// It also empties the list on drop. +pub(super) struct EntryWaitersList<'a> { + // GuardedLinkedList ensures that the concurrent drop of Entry in this slot is safe. + list: GuardedLinkedList::Target>, + is_empty: bool, + wheel_id: u32, + handle: &'a Handle, +} + +impl<'a> Drop for EntryWaitersList<'a> { + fn drop(&mut self) { + // If the list is not empty, we unlink all waiters from it. + // We do not wake the waiters to avoid double panics. + if !self.is_empty { + let _lock = self.handle.inner.lock_sharded_wheel(self.wheel_id); + while self.list.pop_back().is_some() {} + } + } +} + +impl<'a> EntryWaitersList<'a> { + fn new( + unguarded_list: LinkedList::Target>, + guard_handle: TimerHandle, + wheel_id: u32, + handle: &'a Handle, + ) -> Self { + let list = unguarded_list.into_guarded(guard_handle); + Self { + list, + is_empty: false, + wheel_id, + handle, + } + } + + /// Removes the last element from the guarded list. Modifying this list + /// requires an exclusive access to the Wheel with the specified `wheel_id`. + pub(super) fn pop_back_locked(&mut self, _wheel: &mut Wheel) -> Option { + let result = self.list.pop_back(); + if result.is_none() { + // Save information about emptiness to avoid waiting for lock + // in the destructor. + self.is_empty = true; + } + result + } +} /// Timing wheel implementation. /// @@ -36,9 +89,6 @@ pub(crate) struct Wheel { /// * ~ 4 hr slots / ~ 12 day range /// * ~ 12 day slots / ~ 2 yr range levels: Box<[Level; NUM_LEVELS]>, - - /// Entries queued for firing - pending: EntryList, } /// Number of levels. Each level has 64 slots. By using 6 levels with 64 slots @@ -46,6 +96,9 @@ pub(crate) struct Wheel { /// precision of 1 millisecond. const NUM_LEVELS: usize = 6; +/// The max level index. +pub(super) const MAX_LEVEL_INDEX: usize = NUM_LEVELS - 1; + /// The maximum duration of a `Sleep`. pub(super) const MAX_DURATION: u64 = (1 << (6 * NUM_LEVELS)) - 1; @@ -55,7 +108,6 @@ impl Wheel { Wheel { elapsed: 0, levels: Box::new(array::from_fn(Level::new)), - pending: EntryList::new(), } } @@ -90,7 +142,7 @@ impl Wheel { &mut self, item: TimerHandle, ) -> Result { - let when = item.sync_when(); + let when = item.true_when(); if when <= self.elapsed { return Err((item, InsertError::Elapsed)); @@ -99,9 +151,7 @@ impl Wheel { // Get the level at which the entry should be stored let level = self.level_for(when); - unsafe { - self.levels[level].add_entry(item); - } + unsafe { self.levels[level].add_entry(item) }; debug_assert!({ self.levels[level] @@ -116,10 +166,8 @@ impl Wheel { /// Removes `item` from the timing wheel. pub(crate) unsafe fn remove(&mut self, item: NonNull) { unsafe { - let when = item.as_ref().cached_when(); - if when == u64::MAX { - self.pending.remove(item); - } else { + let when = item.as_ref().true_when(); + if when <= MAX_SAFE_MILLIS_DURATION { debug_assert!( self.elapsed <= when, "elapsed={}; when={}", @@ -128,54 +176,42 @@ impl Wheel { ); let level = self.level_for(when); + // If the entry is not contained in the `slot` list, + // then it is contained by a guarded list. self.levels[level].remove_entry(item); } } } + /// Reinserts `item` to the timing wheel. + /// Safety: This entry must not have expired. + pub(super) unsafe fn reinsert_entry(&mut self, entry: TimerHandle, elapsed: u64, when: u64) { + let level = level_for(elapsed, when); + unsafe { self.levels[level].add_entry(entry) }; + } + /// Instant at which to poll. pub(crate) fn poll_at(&self) -> Option { self.next_expiration().map(|expiration| expiration.deadline) } /// Advances the timer up to the instant represented by `now`. - pub(crate) fn poll(&mut self, now: u64) -> Option { - loop { - if let Some(handle) = self.pending.pop_back() { - return Some(handle); - } - - match self.next_expiration() { - Some(ref expiration) if expiration.deadline <= now => { - self.process_expiration(expiration); - - self.set_elapsed(expiration.deadline); - } - _ => { - // in this case the poll did not indicate an expiration - // _and_ we were not able to find a next expiration in - // the current list of timers. advance to the poll's - // current time and do nothing else. - self.set_elapsed(now); - break; - } + pub(crate) fn poll(&mut self, now: u64) -> Option { + match self.next_expiration() { + Some(expiration) if expiration.deadline <= now => Some(expiration), + _ => { + // in this case the poll did not indicate an expiration + // _and_ we were not able to find a next expiration in + // the current list of timers. advance to the poll's + // current time and do nothing else. + self.set_elapsed(now); + None } } - - self.pending.pop_back() } /// Returns the instant at which the next timeout expires. fn next_expiration(&self) -> Option { - if !self.pending.is_empty() { - // Expire immediately as we have things pending firing - return Some(Expiration { - level: 0, - slot: 0, - deadline: self.elapsed, - }); - } - // Check all levels for (level_num, level) in self.levels.iter().enumerate() { if let Some(expiration) = level.next_expiration(self.elapsed) { @@ -211,46 +247,7 @@ impl Wheel { res } - /// iteratively find entries that are between the wheel's current - /// time and the expiration time. for each in that population either - /// queue it for notification (in the case of the last level) or tier - /// it down to the next level (in all other cases). - pub(crate) fn process_expiration(&mut self, expiration: &Expiration) { - // Note that we need to take _all_ of the entries off the list before - // processing any of them. This is important because it's possible that - // those entries might need to be reinserted into the same slot. - // - // This happens only on the highest level, when an entry is inserted - // more than MAX_DURATION into the future. When this happens, we wrap - // around, and process some entries a multiple of MAX_DURATION before - // they actually need to be dropped down a level. We then reinsert them - // back into the same position; we must make sure we don't then process - // those entries again or we'll end up in an infinite loop. - let mut entries = self.take_entries(expiration); - - while let Some(item) = entries.pop_back() { - if expiration.level == 0 { - debug_assert_eq!(unsafe { item.cached_when() }, expiration.deadline); - } - - // Try to expire the entry; this is cheap (doesn't synchronize) if - // the timer is not expired, and updates cached_when. - match unsafe { item.mark_pending(expiration.deadline) } { - Ok(()) => { - // Item was expired - self.pending.push_front(item); - } - Err(expiration_tick) => { - let level = level_for(expiration.deadline, expiration_tick); - unsafe { - self.levels[level].add_entry(item); - } - } - } - } - } - - fn set_elapsed(&mut self, when: u64) { + pub(super) fn set_elapsed(&mut self, when: u64) { assert!( self.elapsed <= when, "elapsed={:?}; when={:?}", @@ -263,9 +260,31 @@ impl Wheel { } } - /// Obtains the list of entries that need processing for the given expiration. - fn take_entries(&mut self, expiration: &Expiration) -> EntryList { - self.levels[expiration.level].take_slot(expiration.slot) + /// Obtains the guarded list of entries that need processing for the given expiration. + /// Safety: The `TimerShared` inside `guard_handle` must be pinned in the memory. + pub(super) unsafe fn get_waiters_list<'a>( + &mut self, + expiration: &Expiration, + guard_handle: TimerHandle, + wheel_id: u32, + handle: &'a Handle, + ) -> EntryWaitersList<'a> { + // Note that we need to take _all_ of the entries off the list before + // processing any of them. This is important because it's possible that + // those entries might need to be reinserted into the same slot. + // + // This happens only on the highest level, when an entry is inserted + // more than MAX_DURATION into the future. When this happens, we wrap + // around, and process some entries a multiple of MAX_DURATION before + // they actually need to be dropped down a level. We then reinsert them + // back into the same position; we must make sure we don't then process + // those entries again or we'll end up in an infinite loop. + let unguarded_list = self.levels[expiration.level].take_slot(expiration.slot); + EntryWaitersList::new(unguarded_list, guard_handle, wheel_id, handle) + } + + pub(super) fn occupied_bit_maintain(&mut self, expiration: &Expiration) { + self.levels[expiration.level].occupied_bit_maintain(expiration.slot); } fn level_for(&self, when: u64) -> usize { diff --git a/tokio/src/util/linked_list.rs b/tokio/src/util/linked_list.rs index 3650f87fbb0..382d9ee1978 100644 --- a/tokio/src/util/linked_list.rs +++ b/tokio/src/util/linked_list.rs @@ -334,6 +334,7 @@ feature! { feature = "sync", feature = "rt", feature = "signal", + feature = "time", )] /// An intrusive linked list, but instead of keeping pointers to the head From 39cf6bba0035bbb32fe89bf8ad0189e96fa2d926 Mon Sep 17 00:00:00 2001 From: FabijanC Date: Sat, 15 Jun 2024 21:10:47 +0200 Subject: [PATCH 048/119] macros: typo fix in join.rs and try_join.rs (#6641) --- tokio/src/macros/join.rs | 2 +- tokio/src/macros/try_join.rs | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tokio/src/macros/join.rs b/tokio/src/macros/join.rs index 8a0198600b2..d82fd5cc26d 100644 --- a/tokio/src/macros/join.rs +++ b/tokio/src/macros/join.rs @@ -16,7 +16,7 @@ /// /// # Notes /// -/// The supplied futures are stored inline and does not require allocating a +/// The supplied futures are stored inline and do not require allocating a /// `Vec`. /// /// ### Runtime characteristics diff --git a/tokio/src/macros/try_join.rs b/tokio/src/macros/try_join.rs index a72cdb4a87a..5c913318ec5 100644 --- a/tokio/src/macros/try_join.rs +++ b/tokio/src/macros/try_join.rs @@ -14,7 +14,7 @@ /// /// # Notes /// -/// The supplied futures are stored inline and does not require allocating a +/// The supplied futures are stored inline and do not require allocating a /// `Vec`. /// /// ### Runtime characteristics From 3bf4f938543bfb4c7122b7f21e9154f4a3b27122 Mon Sep 17 00:00:00 2001 From: Uwe Klotz Date: Sat, 15 Jun 2024 21:11:35 +0200 Subject: [PATCH 049/119] sync: add `watch::Sender::same_channel` (#6637) --- tokio/src/sync/watch.rs | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/tokio/src/sync/watch.rs b/tokio/src/sync/watch.rs index 5810c67de60..366066797f1 100644 --- a/tokio/src/sync/watch.rs +++ b/tokio/src/sync/watch.rs @@ -1324,6 +1324,22 @@ impl Sender { pub fn receiver_count(&self) -> usize { self.shared.ref_count_rx.load(Relaxed) } + + /// Returns `true` if senders belong to the same channel. + /// + /// # Examples + /// + /// ``` + /// let (tx, rx) = tokio::sync::watch::channel(true); + /// let tx2 = tx.clone(); + /// assert!(tx.same_channel(&tx2)); + /// + /// let (tx3, rx3) = tokio::sync::watch::channel(true); + /// assert!(!tx3.same_channel(&tx2)); + /// ``` + pub fn same_channel(&self, other: &Self) -> bool { + Arc::ptr_eq(&self.shared, &other.shared) + } } impl Drop for Sender { From 9a75d6f7f70fd81f589a8209c548944bc3d05f84 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Mon, 17 Jun 2024 10:33:08 +0200 Subject: [PATCH 050/119] metrics: use `MetricAtomic*` for task counters (#6624) --- tokio/src/runtime/metrics/runtime.rs | 566 +++++++++--------- .../runtime/scheduler/current_thread/mod.rs | 6 +- tokio/src/runtime/scheduler/mod.rs | 10 +- .../scheduler/multi_thread/handle/metrics.rs | 10 +- .../multi_thread_alt/handle/metrics.rs | 6 +- tokio/src/runtime/task/list.rs | 6 +- tokio/src/util/metric_atomics.rs | 10 +- tokio/src/util/sharded_list.rs | 31 +- 8 files changed, 331 insertions(+), 314 deletions(-) diff --git a/tokio/src/runtime/metrics/runtime.rs b/tokio/src/runtime/metrics/runtime.rs index f3e02a2a602..4eab344f022 100644 --- a/tokio/src/runtime/metrics/runtime.rs +++ b/tokio/src/runtime/metrics/runtime.rs @@ -102,30 +102,6 @@ impl RuntimeMetrics { self.handle.inner.active_tasks_count() } - /// Returns the number of tasks spawned in this runtime since it was created. - /// - /// This count starts at zero when the runtime is created and increases by one each time a task is spawned. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.spawned_tasks_count(); - /// println!("Runtime has had {} tasks spawned", n); - /// } - /// ``` - pub fn spawned_tasks_count(&self) -> u64 { - self.handle.inner.spawned_tasks_count() - } - /// Returns the number of idle threads, which have spawned by the runtime /// for `spawn_blocking` calls. /// @@ -151,271 +127,295 @@ impl RuntimeMetrics { } cfg_64bit_metrics! { - /// Returns the number of tasks scheduled from **outside** of the runtime. - /// - /// The remote schedule count starts at zero when the runtime is created and - /// increases by one each time a task is woken from **outside** of the - /// runtime. This usually means that a task is spawned or notified from a - /// non-runtime thread and must be queued using the Runtime's injection - /// queue, which tends to be slower. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.remote_schedule_count(); - /// println!("{} tasks were scheduled from outside the runtime", n); - /// } - /// ``` - pub fn remote_schedule_count(&self) -> u64 { - self.handle - .inner - .scheduler_metrics() - .remote_schedule_count - .load(Relaxed) - } + /// Returns the number of tasks spawned in this runtime since it was created. + /// + /// This count starts at zero when the runtime is created and increases by one each time a task is spawned. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.spawned_tasks_count(); + /// println!("Runtime has had {} tasks spawned", n); + /// } + /// ``` + pub fn spawned_tasks_count(&self) -> u64 { + self.handle.inner.spawned_tasks_count() + } - /// Returns the number of times that tasks have been forced to yield back to the scheduler - /// after exhausting their task budgets. - /// - /// This count starts at zero when the runtime is created and increases by one each time a task yields due to exhausting its budget. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - pub fn budget_forced_yield_count(&self) -> u64 { - self.handle - .inner - .scheduler_metrics() - .budget_forced_yield_count - .load(Relaxed) - } + /// Returns the number of tasks scheduled from **outside** of the runtime. + /// + /// The remote schedule count starts at zero when the runtime is created and + /// increases by one each time a task is woken from **outside** of the + /// runtime. This usually means that a task is spawned or notified from a + /// non-runtime thread and must be queued using the Runtime's injection + /// queue, which tends to be slower. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.remote_schedule_count(); + /// println!("{} tasks were scheduled from outside the runtime", n); + /// } + /// ``` + pub fn remote_schedule_count(&self) -> u64 { + self.handle + .inner + .scheduler_metrics() + .remote_schedule_count + .load(Relaxed) + } - /// Returns the total number of times the given worker thread has parked. - /// - /// The worker park count starts at zero when the runtime is created and - /// increases by one each time the worker parks the thread waiting for new - /// inbound events to process. This usually means the worker has processed - /// all pending work and is currently idle. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_park_count(0); - /// println!("worker 0 parked {} times", n); - /// } - /// ``` - pub fn worker_park_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .park_count - .load(Relaxed) - } + /// Returns the number of times that tasks have been forced to yield back to the scheduler + /// after exhausting their task budgets. + /// + /// This count starts at zero when the runtime is created and increases by one each time a task yields due to exhausting its budget. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + pub fn budget_forced_yield_count(&self) -> u64 { + self.handle + .inner + .scheduler_metrics() + .budget_forced_yield_count + .load(Relaxed) + } - /// Returns the number of times the given worker thread unparked but - /// performed no work before parking again. - /// - /// The worker no-op count starts at zero when the runtime is created and - /// increases by one each time the worker unparks the thread but finds no - /// new work and goes back to sleep. This indicates a false-positive wake up. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_noop_count(0); - /// println!("worker 0 had {} no-op unparks", n); - /// } - /// ``` - pub fn worker_noop_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .noop_count - .load(Relaxed) - } + /// Returns the total number of times the given worker thread has parked. + /// + /// The worker park count starts at zero when the runtime is created and + /// increases by one each time the worker parks the thread waiting for new + /// inbound events to process. This usually means the worker has processed + /// all pending work and is currently idle. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_park_count(0); + /// println!("worker 0 parked {} times", n); + /// } + /// ``` + pub fn worker_park_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .park_count + .load(Relaxed) + } - /// Returns the number of tasks the given worker thread stole from - /// another worker thread. - /// - /// This metric only applies to the **multi-threaded** runtime and will - /// always return `0` when using the current thread runtime. - /// - /// The worker steal count starts at zero when the runtime is created and - /// increases by `N` each time the worker has processed its scheduled queue - /// and successfully steals `N` more pending tasks from another worker. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_steal_count(0); - /// println!("worker 0 has stolen {} tasks", n); - /// } - /// ``` - pub fn worker_steal_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .steal_count - .load(Relaxed) - } + /// Returns the number of times the given worker thread unparked but + /// performed no work before parking again. + /// + /// The worker no-op count starts at zero when the runtime is created and + /// increases by one each time the worker unparks the thread but finds no + /// new work and goes back to sleep. This indicates a false-positive wake up. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_noop_count(0); + /// println!("worker 0 had {} no-op unparks", n); + /// } + /// ``` + pub fn worker_noop_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .noop_count + .load(Relaxed) + } - /// Returns the number of times the given worker thread stole tasks from - /// another worker thread. - /// - /// This metric only applies to the **multi-threaded** runtime and will - /// always return `0` when using the current thread runtime. - /// - /// The worker steal count starts at zero when the runtime is created and - /// increases by one each time the worker has processed its scheduled queue - /// and successfully steals more pending tasks from another worker. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_steal_operations(0); - /// println!("worker 0 has stolen tasks {} times", n); - /// } - /// ``` - pub fn worker_steal_operations(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .steal_operations - .load(Relaxed) - } + /// Returns the number of tasks the given worker thread stole from + /// another worker thread. + /// + /// This metric only applies to the **multi-threaded** runtime and will + /// always return `0` when using the current thread runtime. + /// + /// The worker steal count starts at zero when the runtime is created and + /// increases by `N` each time the worker has processed its scheduled queue + /// and successfully steals `N` more pending tasks from another worker. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_steal_count(0); + /// println!("worker 0 has stolen {} tasks", n); + /// } + /// ``` + pub fn worker_steal_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .steal_count + .load(Relaxed) + } - /// Returns the number of tasks the given worker thread has polled. - /// - /// The worker poll count starts at zero when the runtime is created and - /// increases by one each time the worker polls a scheduled task. - /// - /// The counter is monotonically increasing. It is never decremented or - /// reset to zero. - /// - /// # Arguments - /// - /// `worker` is the index of the worker being queried. The given value must - /// be between 0 and `num_workers()`. The index uniquely identifies a single - /// worker and will continue to identify the worker throughout the lifetime - /// of the runtime instance. - /// - /// # Panics - /// - /// The method panics when `worker` represents an invalid worker, i.e. is - /// greater than or equal to `num_workers()`. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.worker_poll_count(0); - /// println!("worker 0 has polled {} tasks", n); - /// } - /// ``` - pub fn worker_poll_count(&self, worker: usize) -> u64 { - self.handle - .inner - .worker_metrics(worker) - .poll_count - .load(Relaxed) - } + /// Returns the number of times the given worker thread stole tasks from + /// another worker thread. + /// + /// This metric only applies to the **multi-threaded** runtime and will + /// always return `0` when using the current thread runtime. + /// + /// The worker steal count starts at zero when the runtime is created and + /// increases by one each time the worker has processed its scheduled queue + /// and successfully steals more pending tasks from another worker. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_steal_operations(0); + /// println!("worker 0 has stolen tasks {} times", n); + /// } + /// ``` + pub fn worker_steal_operations(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .steal_operations + .load(Relaxed) + } + + /// Returns the number of tasks the given worker thread has polled. + /// + /// The worker poll count starts at zero when the runtime is created and + /// increases by one each time the worker polls a scheduled task. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.worker_poll_count(0); + /// println!("worker 0 has polled {} tasks", n); + /// } + /// ``` + pub fn worker_poll_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .poll_count + .load(Relaxed) + } /// Returns the amount of time the given worker thread has been busy. /// diff --git a/tokio/src/runtime/scheduler/current_thread/mod.rs b/tokio/src/runtime/scheduler/current_thread/mod.rs index 805b92a818d..449aa8330f3 100644 --- a/tokio/src/runtime/scheduler/current_thread/mod.rs +++ b/tokio/src/runtime/scheduler/current_thread/mod.rs @@ -537,8 +537,10 @@ cfg_unstable_metrics! { self.shared.owned.active_tasks_count() } - pub(crate) fn spawned_tasks_count(&self) -> u64 { - self.shared.owned.spawned_tasks_count() + cfg_64bit_metrics! { + pub(crate) fn spawned_tasks_count(&self) -> u64 { + self.shared.owned.spawned_tasks_count() + } } } } diff --git a/tokio/src/runtime/scheduler/mod.rs b/tokio/src/runtime/scheduler/mod.rs index 97d9ca6ba17..c0467f45d1c 100644 --- a/tokio/src/runtime/scheduler/mod.rs +++ b/tokio/src/runtime/scheduler/mod.rs @@ -179,6 +179,12 @@ cfg_rt! { use crate::runtime::{SchedulerMetrics, WorkerMetrics}; impl Handle { + cfg_64bit_metrics! { + pub(crate) fn spawned_tasks_count(&self) -> u64 { + match_flavor!(self, Handle(handle) => handle.spawned_tasks_count()) + } + } + pub(crate) fn num_blocking_threads(&self) -> usize { match_flavor!(self, Handle(handle) => handle.num_blocking_threads()) } @@ -191,10 +197,6 @@ cfg_rt! { match_flavor!(self, Handle(handle) => handle.active_tasks_count()) } - pub(crate) fn spawned_tasks_count(&self) -> u64 { - match_flavor!(self, Handle(handle) => handle.spawned_tasks_count()) - } - pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { match_flavor!(self, Handle(handle) => handle.scheduler_metrics()) } diff --git a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs index b1c5bb29f96..5db2336065a 100644 --- a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs +++ b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs @@ -10,6 +10,12 @@ impl Handle { } cfg_unstable_metrics! { + cfg_64bit_metrics! { + pub(crate) fn spawned_tasks_count(&self) -> u64 { + self.shared.owned.spawned_tasks_count() + } + } + pub(crate) fn num_blocking_threads(&self) -> usize { // workers are currently spawned using spawn_blocking self.blocking_spawner @@ -25,10 +31,6 @@ impl Handle { self.shared.owned.active_tasks_count() } - pub(crate) fn spawned_tasks_count(&self) -> u64 { - self.shared.owned.spawned_tasks_count() - } - pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { &self.shared.scheduler_metrics } diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs b/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs index 38d9f4b1cc6..4adc191a6b1 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs @@ -22,8 +22,10 @@ impl Handle { self.shared.owned.active_tasks_count() } - pub(crate) fn spawned_tasks_count(&self) -> u64 { - self.shared.owned.spawned_tasks_count() + cfg_64bit_metrics! { + pub(crate) fn spawned_tasks_count(&self) -> u64 { + self.shared.owned.spawned_tasks_count() + } } pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { diff --git a/tokio/src/runtime/task/list.rs b/tokio/src/runtime/task/list.rs index 5f91cc83da9..7e49293244a 100644 --- a/tokio/src/runtime/task/list.rs +++ b/tokio/src/runtime/task/list.rs @@ -170,8 +170,10 @@ impl OwnedTasks { self.list.len() } - pub(crate) fn spawned_tasks_count(&self) -> u64 { - self.list.added() + cfg_64bit_metrics! { + pub(crate) fn spawned_tasks_count(&self) -> u64 { + self.list.added() + } } pub(crate) fn remove(&self, task: &Task) -> Option> { diff --git a/tokio/src/util/metric_atomics.rs b/tokio/src/util/metric_atomics.rs index 332d2f268e1..afc1cd4c7f4 100644 --- a/tokio/src/util/metric_atomics.rs +++ b/tokio/src/util/metric_atomics.rs @@ -1,4 +1,4 @@ -use std::sync::atomic::Ordering; +use std::sync::atomic::{AtomicUsize, Ordering}; cfg_64bit_metrics! { use std::sync::atomic::AtomicU64; @@ -52,11 +52,17 @@ impl MetricAtomicU64 { /// This exposes simplified APIs for use in metrics & uses `std::sync` instead of Loom to avoid polluting loom logs with metric information. #[derive(Debug, Default)] pub(crate) struct MetricAtomicUsize { - value: std::sync::atomic::AtomicUsize, + value: AtomicUsize, } #[cfg_attr(not(all(tokio_unstable, feature = "rt")), allow(dead_code))] impl MetricAtomicUsize { + pub(crate) fn new(value: usize) -> Self { + Self { + value: AtomicUsize::new(value), + } + } + pub(crate) fn load(&self, ordering: Ordering) -> usize { self.value.load(ordering) } diff --git a/tokio/src/util/sharded_list.rs b/tokio/src/util/sharded_list.rs index 46c34f14133..525cec9ea77 100644 --- a/tokio/src/util/sharded_list.rs +++ b/tokio/src/util/sharded_list.rs @@ -1,9 +1,8 @@ use std::ptr::NonNull; use std::sync::atomic::Ordering; -use crate::loom::sync::atomic::AtomicU64; use crate::loom::sync::{Mutex, MutexGuard}; -use std::sync::atomic::AtomicUsize; +use crate::util::metric_atomics::{MetricAtomicU64, MetricAtomicUsize}; use super::linked_list::{Link, LinkedList}; @@ -15,8 +14,8 @@ use super::linked_list::{Link, LinkedList}; /// Note: Due to its inner sharded design, the order of nodes cannot be guaranteed. pub(crate) struct ShardedList { lists: Box<[Mutex>]>, - added: AtomicU64, - count: AtomicUsize, + added: MetricAtomicU64, + count: MetricAtomicUsize, shard_mask: usize, } @@ -44,8 +43,8 @@ impl ShardedList { } Self { lists: lists.into_boxed_slice(), - added: AtomicU64::new(0), - count: AtomicUsize::new(0), + added: MetricAtomicU64::new(0), + count: MetricAtomicUsize::new(0), shard_mask, } } @@ -54,8 +53,8 @@ impl ShardedList { /// Used to get the lock of shard. pub(crate) struct ShardGuard<'a, L, T> { lock: MutexGuard<'a, LinkedList>, - added: &'a AtomicU64, - count: &'a AtomicUsize, + added: &'a MetricAtomicU64, + count: &'a MetricAtomicUsize, id: usize, } @@ -66,7 +65,7 @@ impl ShardedList { let mut lock = self.shard_inner(shard_id); let node = lock.pop_back(); if node.is_some() { - self.count.fetch_sub(1, Ordering::Relaxed); + self.count.decrement(); } node } @@ -86,7 +85,7 @@ impl ShardedList { // to be in any other list of the same sharded list. let node = unsafe { lock.remove(node) }; if node.is_some() { - self.count.fetch_sub(1, Ordering::Relaxed); + self.count.decrement(); } node } @@ -107,9 +106,11 @@ impl ShardedList { self.count.load(Ordering::Relaxed) } - /// Gets the total number of elements added to this list. - pub(crate) fn added(&self) -> u64 { - self.added.load(Ordering::Relaxed) + cfg_64bit_metrics! { + /// Gets the total number of elements added to this list. + pub(crate) fn added(&self) -> u64 { + self.added.load(Ordering::Relaxed) + } } /// Returns whether the linked list does not contain any node. @@ -137,8 +138,8 @@ impl<'a, L: ShardedListItem> ShardGuard<'a, L, L::Target> { let id = unsafe { L::get_shard_id(L::as_raw(&val)) }; assert_eq!(id, self.id); self.lock.push_front(val); - self.added.fetch_add(1, Ordering::Relaxed); - self.count.fetch_add(1, Ordering::Relaxed); + self.added.add(1, Ordering::Relaxed); + self.count.increment(); } } From ed4ddf443d93c3e14ae23699a5a2f81902ad1e66 Mon Sep 17 00:00:00 2001 From: Eric Seppanen <109770420+eric-seppanen@users.noreply.github.com> Date: Fri, 21 Jun 2024 06:00:33 -0700 Subject: [PATCH 051/119] io: fix trait bounds on impl Sink for StreamReader (#6647) This impl had a bound on `StreamReader`; this is incorrect because: - The second generic parameter to `StreamReader` is not an error type; it's a buffer type. - The `Stream` error type in `StreamReader` should not need to be the same as the `Sink` error type. This "passthrough" `Sink` impl was effectively unusable because it required the `Sink` error type be the same as the `StreamReader` buffer type. Resolve this by allowing the `StreamReader` buffer to be anything in this impl. --- tokio-util/src/io/stream_reader.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tokio-util/src/io/stream_reader.rs b/tokio-util/src/io/stream_reader.rs index 096c96f301a..7569a8b7832 100644 --- a/tokio-util/src/io/stream_reader.rs +++ b/tokio-util/src/io/stream_reader.rs @@ -326,7 +326,7 @@ impl StreamReader { } } -impl, E, T> Sink for StreamReader { +impl, B, E, T> Sink for StreamReader { type Error = E; fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { self.project().inner.poll_ready(cx) From 06582776a564c88a7b4c6f9e3d7c0ebd0ef3f34b Mon Sep 17 00:00:00 2001 From: Hai-Hsin Date: Sun, 23 Jun 2024 12:52:51 +0800 Subject: [PATCH 052/119] codec: fix `length_delimited` docs examples (#6638) --- tokio-util/src/codec/length_delimited.rs | 116 ++++++++++++++--------- 1 file changed, 69 insertions(+), 47 deletions(-) diff --git a/tokio-util/src/codec/length_delimited.rs b/tokio-util/src/codec/length_delimited.rs index c37f5863bd4..c1f24167a06 100644 --- a/tokio-util/src/codec/length_delimited.rs +++ b/tokio-util/src/codec/length_delimited.rs @@ -75,30 +75,32 @@ //! //! ## Example 1 //! -//! The following will parse a `u16` length field at offset 0, including the +//! The following will parse a `u16` length field at offset 0, omitting the //! frame head in the yielded `BytesMut`. //! //! ``` -//! # use tokio::io::AsyncRead; +//! # use tokio_stream::StreamExt; //! # use tokio_util::codec::LengthDelimitedCodec; -//! # fn bind_read(io: T) { -//! LengthDelimitedCodec::builder() +//! # #[tokio::main] +//! # async fn main() { +//! # let io: &[u8] = b"\x00\x0BHello world"; +//! let mut reader = LengthDelimitedCodec::builder() //! .length_field_offset(0) // default value //! .length_field_type::() //! .length_adjustment(0) // default value -//! .num_skip(0) // Do not strip frame header //! .new_read(io); +//! # let res = reader.next().await.unwrap().unwrap().to_vec(); +//! # assert_eq!(res, b"Hello world"); //! # } -//! # pub fn main() {} //! ``` //! //! The following frame will be decoded as such: //! //! ```text -//! INPUT DECODED -//! +-- len ---+--- Payload ---+ +-- len ---+--- Payload ---+ -//! | \x00\x0B | Hello world | --> | \x00\x0B | Hello world | -//! +----------+---------------+ +----------+---------------+ +//! INPUT DECODED +//! +-- len ---+--- Payload ---+ +--- Payload ---+ +//! | \x00\x0B | Hello world | --> | Hello world | +//! +----------+---------------+ +---------------+ //! ``` //! //! The value of the length field is 11 (`\x0B`) which represents the length @@ -109,62 +111,69 @@ //! //! ## Example 2 //! -//! The following will parse a `u16` length field at offset 0, omitting the +//! The following will parse a `u16` length field at offset 0, including the //! frame head in the yielded `BytesMut`. //! //! ``` -//! # use tokio::io::AsyncRead; +//! # use tokio_stream::StreamExt; //! # use tokio_util::codec::LengthDelimitedCodec; -//! # fn bind_read(io: T) { -//! LengthDelimitedCodec::builder() +//! # #[tokio::main] +//! # async fn main() { +//! # let io: &[u8] = b"\x00\x0BHello world"; +//! let mut reader = LengthDelimitedCodec::builder() //! .length_field_offset(0) // default value //! .length_field_type::() -//! .length_adjustment(0) // default value -//! // `num_skip` is not needed, the default is to skip +//! .length_adjustment(2) // Add head size to length +//! .num_skip(0) // Do NOT skip the head //! .new_read(io); +//! # let res = reader.next().await.unwrap().unwrap().to_vec(); +//! # assert_eq!(res, b"\x00\x0BHello world"); //! # } -//! # pub fn main() {} //! ``` //! //! The following frame will be decoded as such: //! //! ```text -//! INPUT DECODED -//! +-- len ---+--- Payload ---+ +--- Payload ---+ -//! | \x00\x0B | Hello world | --> | Hello world | -//! +----------+---------------+ +---------------+ +//! INPUT DECODED +//! +-- len ---+--- Payload ---+ +-- len ---+--- Payload ---+ +//! | \x00\x0B | Hello world | --> | \x00\x0B | Hello world | +//! +----------+---------------+ +----------+---------------+ //! ``` //! //! This is similar to the first example, the only difference is that the -//! frame head is **not** included in the yielded `BytesMut` value. +//! frame head is **included** in the yielded `BytesMut` value. To achieve +//! this, we need to add the header size to the length with `length_adjustment`, +//! and set `num_skip` to `0` to prevent skipping the head. //! //! ## Example 3 //! -//! The following will parse a `u16` length field at offset 0, including the +//! The following will parse a `u16` length field at offset 0, omitting the //! frame head in the yielded `BytesMut`. In this case, the length field //! **includes** the frame head length. //! //! ``` -//! # use tokio::io::AsyncRead; +//! # use tokio_stream::StreamExt; //! # use tokio_util::codec::LengthDelimitedCodec; -//! # fn bind_read(io: T) { -//! LengthDelimitedCodec::builder() +//! # #[tokio::main] +//! # async fn main() { +//! # let io: &[u8] = b"\x00\x0DHello world"; +//! let mut reader = LengthDelimitedCodec::builder() //! .length_field_offset(0) // default value //! .length_field_type::() //! .length_adjustment(-2) // size of head -//! .num_skip(0) //! .new_read(io); +//! # let res = reader.next().await.unwrap().unwrap().to_vec(); +//! # assert_eq!(res, b"Hello world"); //! # } -//! # pub fn main() {} //! ``` //! //! The following frame will be decoded as such: //! //! ```text //! INPUT DECODED -//! +-- len ---+--- Payload ---+ +-- len ---+--- Payload ---+ -//! | \x00\x0D | Hello world | --> | \x00\x0D | Hello world | -//! +----------+---------------+ +----------+---------------+ +//! +-- len ---+--- Payload ---+ +--- Payload ---+ +//! | \x00\x0D | Hello world | --> | Hello world | +//! +----------+---------------+ +---------------+ //! ``` //! //! In most cases, the length field represents the length of the payload @@ -179,17 +188,20 @@ //! frame head, including the frame head in the yielded `BytesMut`. //! //! ``` -//! # use tokio::io::AsyncRead; +//! # use tokio_stream::StreamExt; //! # use tokio_util::codec::LengthDelimitedCodec; -//! # fn bind_read(io: T) { -//! LengthDelimitedCodec::builder() +//! # #[tokio::main] +//! # async fn main() { +//! # let io: &[u8] = b"\x00\x00\x0B\xCA\xFEHello world"; +//! let mut reader = LengthDelimitedCodec::builder() //! .length_field_offset(0) // default value //! .length_field_length(3) -//! .length_adjustment(2) // remaining head +//! .length_adjustment(3 + 2) // len field and remaining head //! .num_skip(0) //! .new_read(io); +//! # let res = reader.next().await.unwrap().unwrap().to_vec(); +//! # assert_eq!(res, b"\x00\x00\x0B\xCA\xFEHello world"); //! # } -//! # pub fn main() {} //! ``` //! //! The following frame will be decoded as such: @@ -223,17 +235,20 @@ //! included. //! //! ``` -//! # use tokio::io::AsyncRead; +//! # use tokio_stream::StreamExt; //! # use tokio_util::codec::LengthDelimitedCodec; -//! # fn bind_read(io: T) { -//! LengthDelimitedCodec::builder() +//! # #[tokio::main] +//! # async fn main() { +//! # let io: &[u8] = b"\xCA\x00\x0B\xFEHello world"; +//! let mut reader = LengthDelimitedCodec::builder() //! .length_field_offset(1) // length of hdr1 //! .length_field_type::() //! .length_adjustment(1) // length of hdr2 //! .num_skip(3) // length of hdr1 + LEN //! .new_read(io); +//! # let res = reader.next().await.unwrap().unwrap().to_vec(); +//! # assert_eq!(res, b"\xFEHello world"); //! # } -//! # pub fn main() {} //! ``` //! //! The following frame will be decoded as such: @@ -269,15 +284,19 @@ //! length. //! //! ``` -//! # use tokio::io::AsyncRead; +//! # use tokio_stream::StreamExt; //! # use tokio_util::codec::LengthDelimitedCodec; -//! # fn bind_read(io: T) { -//! LengthDelimitedCodec::builder() +//! # #[tokio::main] +//! # async fn main() { +//! # let io: &[u8] = b"\xCA\x00\x0F\xFEHello world"; +//! let mut reader = LengthDelimitedCodec::builder() //! .length_field_offset(1) // length of hdr1 //! .length_field_type::() //! .length_adjustment(-3) // length of hdr1 + LEN, negative //! .num_skip(3) //! .new_read(io); +//! # let res = reader.next().await.unwrap().unwrap().to_vec(); +//! # assert_eq!(res, b"\xFEHello world"); //! # } //! ``` //! @@ -308,17 +327,20 @@ //! frame head, excluding the 4th byte from the yielded `BytesMut`. //! //! ``` -//! # use tokio::io::AsyncRead; +//! # use tokio_stream::StreamExt; //! # use tokio_util::codec::LengthDelimitedCodec; -//! # fn bind_read(io: T) { -//! LengthDelimitedCodec::builder() +//! # #[tokio::main] +//! # async fn main() { +//! # let io: &[u8] = b"\x00\x00\x0B\xFFHello world"; +//! let mut reader = LengthDelimitedCodec::builder() //! .length_field_offset(0) // default value //! .length_field_length(3) //! .length_adjustment(0) // default value //! .num_skip(4) // skip the first 4 bytes //! .new_read(io); +//! # let res = reader.next().await.unwrap().unwrap().to_vec(); +//! # assert_eq!(res, b"Hello world"); //! # } -//! # pub fn main() {} //! ``` //! //! The following frame will be decoded as such: From 65d0e08d39f06eba88661d3d6de665b14588f30d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Tobias=20Nie=C3=9Fen?= Date: Thu, 27 Jun 2024 18:10:14 +0200 Subject: [PATCH 053/119] runtime: fix typo in unhandled_panic (#6660) --- tokio/src/runtime/builder.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tokio/src/runtime/builder.rs b/tokio/src/runtime/builder.rs index 519c7d01413..16be770985c 100644 --- a/tokio/src/runtime/builder.rs +++ b/tokio/src/runtime/builder.rs @@ -816,7 +816,7 @@ impl Builder { /// /// By default, an unhandled panic (i.e. a panic not caught by /// [`std::panic::catch_unwind`]) has no impact on the runtime's - /// execution. The panic is error value is forwarded to the task's + /// execution. The panic's error value is forwarded to the task's /// [`JoinHandle`] and all other spawned tasks continue running. /// /// The `unhandled_panic` option enables configuring this behavior. From 68d0e3cb5fc0b5e4348e5eeab79e44fc91f0f2d4 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Sun, 30 Jun 2024 14:02:29 +0100 Subject: [PATCH 054/119] metrics: rename `num_active_tasks` to `num_alive_tasks` (#6667) --- tokio/src/runtime/metrics/runtime.rs | 19 ++++++++++--------- .../runtime/scheduler/current_thread/mod.rs | 4 ++-- tokio/src/runtime/scheduler/mod.rs | 4 ++-- .../scheduler/multi_thread/handle/metrics.rs | 4 ++-- .../multi_thread_alt/handle/metrics.rs | 4 ++-- tokio/src/runtime/task/list.rs | 2 +- tokio/tests/rt_metrics.rs | 16 ++++++++-------- 7 files changed, 27 insertions(+), 26 deletions(-) diff --git a/tokio/src/runtime/metrics/runtime.rs b/tokio/src/runtime/metrics/runtime.rs index 4eab344f022..bdf7791bea9 100644 --- a/tokio/src/runtime/metrics/runtime.rs +++ b/tokio/src/runtime/metrics/runtime.rs @@ -75,15 +75,16 @@ impl RuntimeMetrics { self.handle.inner.num_blocking_threads() } - #[deprecated = "Renamed to num_active_tasks"] - /// Renamed to [`RuntimeMetrics::num_active_tasks`] + #[deprecated = "Renamed to num_alive_tasks"] + /// Renamed to [`RuntimeMetrics::num_alive_tasks`] pub fn active_tasks_count(&self) -> usize { - self.num_active_tasks() + self.num_alive_tasks() } - /// Returns the current number of active tasks in the runtime. + /// Returns the current number of alive tasks in the runtime. /// - /// This value increases and decreases over time as tasks are spawned and as they are completed or cancelled. + /// This counter increases when a task is spawned and decreases when a + /// task exits. /// /// # Examples /// @@ -94,12 +95,12 @@ impl RuntimeMetrics { /// async fn main() { /// let metrics = Handle::current().metrics(); /// - /// let n = metrics.num_active_tasks(); - /// println!("Runtime has {} active tasks", n); + /// let n = metrics.num_alive_tasks(); + /// println!("Runtime has {} alive tasks", n); /// } /// ``` - pub fn num_active_tasks(&self) -> usize { - self.handle.inner.active_tasks_count() + pub fn num_alive_tasks(&self) -> usize { + self.handle.inner.alive_tasks_count() } /// Returns the number of idle threads, which have spawned by the runtime diff --git a/tokio/src/runtime/scheduler/current_thread/mod.rs b/tokio/src/runtime/scheduler/current_thread/mod.rs index 449aa8330f3..b1e5df532ad 100644 --- a/tokio/src/runtime/scheduler/current_thread/mod.rs +++ b/tokio/src/runtime/scheduler/current_thread/mod.rs @@ -533,8 +533,8 @@ cfg_unstable_metrics! { self.blocking_spawner.queue_depth() } - pub(crate) fn active_tasks_count(&self) -> usize { - self.shared.owned.active_tasks_count() + pub(crate) fn alive_tasks_count(&self) -> usize { + self.shared.owned.alive_tasks_count() } cfg_64bit_metrics! { diff --git a/tokio/src/runtime/scheduler/mod.rs b/tokio/src/runtime/scheduler/mod.rs index c0467f45d1c..f6dc7ed6204 100644 --- a/tokio/src/runtime/scheduler/mod.rs +++ b/tokio/src/runtime/scheduler/mod.rs @@ -193,8 +193,8 @@ cfg_rt! { match_flavor!(self, Handle(handle) => handle.num_idle_blocking_threads()) } - pub(crate) fn active_tasks_count(&self) -> usize { - match_flavor!(self, Handle(handle) => handle.active_tasks_count()) + pub(crate) fn alive_tasks_count(&self) -> usize { + match_flavor!(self, Handle(handle) => handle.alive_tasks_count()) } pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { diff --git a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs index 5db2336065a..bc0723fe8dc 100644 --- a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs +++ b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs @@ -27,8 +27,8 @@ impl Handle { self.blocking_spawner.num_idle_threads() } - pub(crate) fn active_tasks_count(&self) -> usize { - self.shared.owned.active_tasks_count() + pub(crate) fn alive_tasks_count(&self) -> usize { + self.shared.owned.alive_tasks_count() } pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs b/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs index 4adc191a6b1..6bb6e1aecb3 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs @@ -18,8 +18,8 @@ impl Handle { self.blocking_spawner.num_idle_threads() } - pub(crate) fn active_tasks_count(&self) -> usize { - self.shared.owned.active_tasks_count() + pub(crate) fn alive_tasks_count(&self) -> usize { + self.shared.owned.alive_tasks_count() } cfg_64bit_metrics! { diff --git a/tokio/src/runtime/task/list.rs b/tokio/src/runtime/task/list.rs index 7e49293244a..63ff4567231 100644 --- a/tokio/src/runtime/task/list.rs +++ b/tokio/src/runtime/task/list.rs @@ -166,7 +166,7 @@ impl OwnedTasks { self.list.shard_size() } - pub(crate) fn active_tasks_count(&self) -> usize { + pub(crate) fn alive_tasks_count(&self) -> usize { self.list.len() } diff --git a/tokio/tests/rt_metrics.rs b/tokio/tests/rt_metrics.rs index 0680d7960a5..ff49e6a6129 100644 --- a/tokio/tests/rt_metrics.rs +++ b/tokio/tests/rt_metrics.rs @@ -93,22 +93,22 @@ fn blocking_queue_depth() { } #[test] -fn num_active_tasks() { +fn num_alive_tasks() { let rt = current_thread(); let metrics = rt.metrics(); - assert_eq!(0, metrics.num_active_tasks()); + assert_eq!(0, metrics.num_alive_tasks()); rt.block_on(rt.spawn(async move { - assert_eq!(1, metrics.num_active_tasks()); + assert_eq!(1, metrics.num_alive_tasks()); })) .unwrap(); - assert_eq!(0, rt.metrics().num_active_tasks()); + assert_eq!(0, rt.metrics().num_alive_tasks()); let rt = threaded(); let metrics = rt.metrics(); - assert_eq!(0, metrics.num_active_tasks()); + assert_eq!(0, metrics.num_alive_tasks()); rt.block_on(rt.spawn(async move { - assert_eq!(1, metrics.num_active_tasks()); + assert_eq!(1, metrics.num_alive_tasks()); })) .unwrap(); @@ -116,12 +116,12 @@ fn num_active_tasks() { // wake_join() is called before the task is released, so in multithreaded // code, this means we sometimes exit the block_on before the counter decrements. for _ in 0..100 { - if rt.metrics().num_active_tasks() == 0 { + if rt.metrics().num_alive_tasks() == 0 { break; } std::thread::sleep(std::time::Duration::from_millis(100)); } - assert_eq!(0, rt.metrics().num_active_tasks()); + assert_eq!(0, rt.metrics().num_alive_tasks()); } #[test] From dff4ecd0e7102b0d72b76c191e1dd0a73b2d3a0e Mon Sep 17 00:00:00 2001 From: Michael Macias Date: Sun, 30 Jun 2024 20:50:49 -0500 Subject: [PATCH 055/119] io: implement `AsyncSeek` for `Empty` (#6663) * io: implement `AsyncSeek` for `Empty` * io: add more tests for seeking `Empty` This adds more tests seeking with other kinds of `SeekFrom`. It follows the same structure as used in rust-lang/rust@f1cd17961ccaac4bfaeeab81969cf36c56eec4a5. See . * io: add inline attribute to `AsyncSeek` implementations This follows the style of the other trait implementations of `Empty`. See . --------- Co-authored-by: Weijia Jiang --- tokio/src/io/util/empty.rs | 18 ++++++++++++++++-- tokio/tests/io_util_empty.rs | 31 ++++++++++++++++++++++++++++++- 2 files changed, 46 insertions(+), 3 deletions(-) diff --git a/tokio/src/io/util/empty.rs b/tokio/src/io/util/empty.rs index 289725ce49f..cc86e8b09a1 100644 --- a/tokio/src/io/util/empty.rs +++ b/tokio/src/io/util/empty.rs @@ -1,8 +1,8 @@ use crate::io::util::poll_proceed_and_make_progress; -use crate::io::{AsyncBufRead, AsyncRead, AsyncWrite, ReadBuf}; +use crate::io::{AsyncBufRead, AsyncRead, AsyncSeek, AsyncWrite, ReadBuf}; use std::fmt; -use std::io; +use std::io::{self, SeekFrom}; use std::pin::Pin; use std::task::{Context, Poll}; @@ -133,6 +133,20 @@ impl AsyncWrite for Empty { } } +impl AsyncSeek for Empty { + #[inline] + fn start_seek(self: Pin<&mut Self>, _position: SeekFrom) -> io::Result<()> { + Ok(()) + } + + #[inline] + fn poll_complete(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + ready!(crate::trace::trace_leaf(cx)); + ready!(poll_proceed_and_make_progress(cx)); + Poll::Ready(Ok(0)) + } +} + impl fmt::Debug for Empty { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.pad("Empty { .. }") diff --git a/tokio/tests/io_util_empty.rs b/tokio/tests/io_util_empty.rs index e49cd17fcd5..7a4b8c6a575 100644 --- a/tokio/tests/io_util_empty.rs +++ b/tokio/tests/io_util_empty.rs @@ -1,5 +1,5 @@ #![cfg(feature = "full")] -use tokio::io::{AsyncBufReadExt, AsyncReadExt}; +use tokio::io::{AsyncBufReadExt, AsyncReadExt, AsyncSeekExt}; #[tokio::test] async fn empty_read_is_cooperative() { @@ -30,3 +30,32 @@ async fn empty_buf_reads_are_cooperative() { _ = tokio::task::yield_now() => {} } } + +#[tokio::test] +async fn empty_seek() { + use std::io::SeekFrom; + + let mut empty = tokio::io::empty(); + + assert!(matches!(empty.seek(SeekFrom::Start(0)).await, Ok(0))); + assert!(matches!(empty.seek(SeekFrom::Start(1)).await, Ok(0))); + assert!(matches!(empty.seek(SeekFrom::Start(u64::MAX)).await, Ok(0))); + + assert!(matches!(empty.seek(SeekFrom::End(i64::MIN)).await, Ok(0))); + assert!(matches!(empty.seek(SeekFrom::End(-1)).await, Ok(0))); + assert!(matches!(empty.seek(SeekFrom::End(0)).await, Ok(0))); + assert!(matches!(empty.seek(SeekFrom::End(1)).await, Ok(0))); + assert!(matches!(empty.seek(SeekFrom::End(i64::MAX)).await, Ok(0))); + + assert!(matches!( + empty.seek(SeekFrom::Current(i64::MIN)).await, + Ok(0) + )); + assert!(matches!(empty.seek(SeekFrom::Current(-1)).await, Ok(0))); + assert!(matches!(empty.seek(SeekFrom::Current(0)).await, Ok(0))); + assert!(matches!(empty.seek(SeekFrom::Current(1)).await, Ok(0))); + assert!(matches!( + empty.seek(SeekFrom::Current(i64::MAX)).await, + Ok(0) + )); +} From fe7285d3d167e7b0ff611d7dfc99fe8b00932015 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E4=BA=8C=E6=89=8B=E6=8E=89=E5=8C=85=E5=B7=A5=E7=A8=8B?= =?UTF-8?q?=E5=B8=88?= Date: Tue, 2 Jul 2024 23:41:15 +0800 Subject: [PATCH 056/119] sync: add `{Receiver,UnboundedReceiver}::{sender_strong_count,sender_weak_count}` (#6661) --- tokio/src/sync/mpsc/bounded.rs | 10 ++++++++++ tokio/src/sync/mpsc/chan.rs | 8 ++++++++ tokio/src/sync/mpsc/unbounded.rs | 12 +++++++++++- tokio/tests/sync_mpsc_weak.rs | 33 +++++++++++++++++++++++--------- 4 files changed, 53 insertions(+), 10 deletions(-) diff --git a/tokio/src/sync/mpsc/bounded.rs b/tokio/src/sync/mpsc/bounded.rs index a4f98060b19..beda7fe1bf4 100644 --- a/tokio/src/sync/mpsc/bounded.rs +++ b/tokio/src/sync/mpsc/bounded.rs @@ -711,6 +711,16 @@ impl Receiver { ) -> Poll { self.chan.recv_many(cx, buffer, limit) } + + /// Returns the number of [`Sender`] handles. + pub fn sender_strong_count(&self) -> usize { + self.chan.sender_strong_count() + } + + /// Returns the number of [`WeakSender`] handles. + pub fn sender_weak_count(&self) -> usize { + self.chan.sender_weak_count() + } } impl fmt::Debug for Receiver { diff --git a/tokio/src/sync/mpsc/chan.rs b/tokio/src/sync/mpsc/chan.rs index d8838242a39..4006aa2b746 100644 --- a/tokio/src/sync/mpsc/chan.rs +++ b/tokio/src/sync/mpsc/chan.rs @@ -469,6 +469,14 @@ impl Rx { pub(super) fn semaphore(&self) -> &S { &self.inner.semaphore } + + pub(super) fn sender_strong_count(&self) -> usize { + self.inner.tx_count.load(Acquire) + } + + pub(super) fn sender_weak_count(&self) -> usize { + self.inner.tx_weak_count.load(Relaxed) + } } impl Drop for Rx { diff --git a/tokio/src/sync/mpsc/unbounded.rs b/tokio/src/sync/mpsc/unbounded.rs index a3398c4bf54..47e1b6c7c77 100644 --- a/tokio/src/sync/mpsc/unbounded.rs +++ b/tokio/src/sync/mpsc/unbounded.rs @@ -348,7 +348,7 @@ impl UnboundedReceiver { /// assert!(!rx.is_closed()); /// /// rx.close(); - /// + /// /// assert!(rx.is_closed()); /// } /// ``` @@ -498,6 +498,16 @@ impl UnboundedReceiver { ) -> Poll { self.chan.recv_many(cx, buffer, limit) } + + /// Returns the number of [`UnboundedSender`] handles. + pub fn sender_strong_count(&self) -> usize { + self.chan.sender_strong_count() + } + + /// Returns the number of [`WeakUnboundedSender`] handles. + pub fn sender_weak_count(&self) -> usize { + self.chan.sender_weak_count() + } } impl UnboundedSender { diff --git a/tokio/tests/sync_mpsc_weak.rs b/tokio/tests/sync_mpsc_weak.rs index 6b7555a5cdd..fba0fe4e33a 100644 --- a/tokio/tests/sync_mpsc_weak.rs +++ b/tokio/tests/sync_mpsc_weak.rs @@ -532,12 +532,13 @@ async fn test_rx_unbounded_is_closed_when_dropping_all_senders_except_weak_sende #[tokio::test] async fn sender_strong_count_when_cloned() { - let (tx, _rx) = mpsc::channel::<()>(1); + let (tx, rx) = mpsc::channel::<()>(1); let tx2 = tx.clone(); assert_eq!(tx.strong_count(), 2); assert_eq!(tx2.strong_count(), 2); + assert_eq!(rx.sender_strong_count(), 2); } #[tokio::test] @@ -552,29 +553,31 @@ async fn sender_weak_count_when_downgraded() { #[tokio::test] async fn sender_strong_count_when_dropped() { - let (tx, _rx) = mpsc::channel::<()>(1); + let (tx, rx) = mpsc::channel::<()>(1); let tx2 = tx.clone(); drop(tx2); assert_eq!(tx.strong_count(), 1); + assert_eq!(rx.sender_strong_count(), 1); } #[tokio::test] async fn sender_weak_count_when_dropped() { - let (tx, _rx) = mpsc::channel::<()>(1); + let (tx, rx) = mpsc::channel::<()>(1); let weak = tx.downgrade(); drop(weak); assert_eq!(tx.weak_count(), 0); + assert_eq!(rx.sender_weak_count(), 0); } #[tokio::test] async fn sender_strong_and_weak_conut() { - let (tx, _rx) = mpsc::channel::<()>(1); + let (tx, rx) = mpsc::channel::<()>(1); let tx2 = tx.clone(); @@ -585,67 +588,75 @@ async fn sender_strong_and_weak_conut() { assert_eq!(tx2.strong_count(), 2); assert_eq!(weak.strong_count(), 2); assert_eq!(weak2.strong_count(), 2); + assert_eq!(rx.sender_strong_count(), 2); assert_eq!(tx.weak_count(), 2); assert_eq!(tx2.weak_count(), 2); assert_eq!(weak.weak_count(), 2); assert_eq!(weak2.weak_count(), 2); + assert_eq!(rx.sender_weak_count(), 2); drop(tx2); drop(weak2); assert_eq!(tx.strong_count(), 1); assert_eq!(weak.strong_count(), 1); + assert_eq!(rx.sender_strong_count(), 1); assert_eq!(tx.weak_count(), 1); assert_eq!(weak.weak_count(), 1); + assert_eq!(rx.sender_weak_count(), 1); } #[tokio::test] async fn unbounded_sender_strong_count_when_cloned() { - let (tx, _rx) = mpsc::unbounded_channel::<()>(); + let (tx, rx) = mpsc::unbounded_channel::<()>(); let tx2 = tx.clone(); assert_eq!(tx.strong_count(), 2); assert_eq!(tx2.strong_count(), 2); + assert_eq!(rx.sender_strong_count(), 2); } #[tokio::test] async fn unbounded_sender_weak_count_when_downgraded() { - let (tx, _rx) = mpsc::unbounded_channel::<()>(); + let (tx, rx) = mpsc::unbounded_channel::<()>(); let weak = tx.downgrade(); assert_eq!(tx.weak_count(), 1); assert_eq!(weak.weak_count(), 1); + assert_eq!(rx.sender_weak_count(), 1); } #[tokio::test] async fn unbounded_sender_strong_count_when_dropped() { - let (tx, _rx) = mpsc::unbounded_channel::<()>(); + let (tx, rx) = mpsc::unbounded_channel::<()>(); let tx2 = tx.clone(); drop(tx2); assert_eq!(tx.strong_count(), 1); + assert_eq!(rx.sender_strong_count(), 1); } #[tokio::test] async fn unbounded_sender_weak_count_when_dropped() { - let (tx, _rx) = mpsc::unbounded_channel::<()>(); + let (tx, rx) = mpsc::unbounded_channel::<()>(); let weak = tx.downgrade(); drop(weak); assert_eq!(tx.weak_count(), 0); + assert_eq!(rx.sender_weak_count(), 0); } #[tokio::test] async fn unbounded_sender_strong_and_weak_conut() { - let (tx, _rx) = mpsc::unbounded_channel::<()>(); + let (tx, rx) = mpsc::unbounded_channel::<()>(); let tx2 = tx.clone(); @@ -656,18 +667,22 @@ async fn unbounded_sender_strong_and_weak_conut() { assert_eq!(tx2.strong_count(), 2); assert_eq!(weak.strong_count(), 2); assert_eq!(weak2.strong_count(), 2); + assert_eq!(rx.sender_strong_count(), 2); assert_eq!(tx.weak_count(), 2); assert_eq!(tx2.weak_count(), 2); assert_eq!(weak.weak_count(), 2); assert_eq!(weak2.weak_count(), 2); + assert_eq!(rx.sender_weak_count(), 2); drop(tx2); drop(weak2); assert_eq!(tx.strong_count(), 1); assert_eq!(weak.strong_count(), 1); + assert_eq!(rx.sender_strong_count(), 1); assert_eq!(tx.weak_count(), 1); assert_eq!(weak.weak_count(), 1); + assert_eq!(rx.sender_weak_count(), 1); } From 4d0d89fb70d7e093c5401d0f8241275db673e70d Mon Sep 17 00:00:00 2001 From: teor Date: Wed, 3 Jul 2024 01:54:59 +1000 Subject: [PATCH 057/119] task: document behavior of `JoinSet::try_join_next` when all tasks are running (#6671) --- tokio/src/task/join_set.rs | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tokio/src/task/join_set.rs b/tokio/src/task/join_set.rs index 267ceb55bcc..612e53addb3 100644 --- a/tokio/src/task/join_set.rs +++ b/tokio/src/task/join_set.rs @@ -308,7 +308,7 @@ impl JoinSet { /// Tries to join one of the tasks in the set that has completed and return its output. /// - /// Returns `None` if the set is empty. + /// Returns `None` if there are no completed tasks, or if the set is empty. pub fn try_join_next(&mut self) -> Option> { // Loop over all notified `JoinHandle`s to find one that's ready, or until none are left. loop { @@ -331,7 +331,7 @@ impl JoinSet { /// Tries to join one of the tasks in the set that has completed and return its output, /// along with the [task ID] of the completed task. /// - /// Returns `None` if the set is empty. + /// Returns `None` if there are no completed tasks, or if the set is empty. /// /// When this method returns an error, then the id of the task that failed can be accessed /// using the [`JoinError::id`] method. From b2e4c5fc9e80065506c556427e37a07f02f49e71 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Tue, 2 Jul 2024 21:25:49 +0100 Subject: [PATCH 058/119] io: hardcode platform list in short-read optimization (#6668) --- tokio/src/io/poll_evented.rs | 37 +++++++++++++++++++++++++++++++----- 1 file changed, 32 insertions(+), 5 deletions(-) diff --git a/tokio/src/io/poll_evented.rs b/tokio/src/io/poll_evented.rs index 3952a31e783..73cb8e5809e 100644 --- a/tokio/src/io/poll_evented.rs +++ b/tokio/src/io/poll_evented.rs @@ -179,15 +179,42 @@ feature! { let evt = ready!(self.registration.poll_read_ready(cx))?; let b = &mut *(buf.unfilled_mut() as *mut [std::mem::MaybeUninit] as *mut [u8]); + + // used only when the cfgs below apply + #[allow(unused_variables)] let len = b.len(); match self.io.as_ref().unwrap().read(b) { Ok(n) => { - // if we read a partially full buffer, this is sufficient on unix to show - // that the socket buffer has been drained. Unfortunately this assumption - // fails for level-triggered selectors (like on Windows or poll even for - // UNIX): https://github.com/tokio-rs/tokio/issues/5866 - if n > 0 && (!cfg!(windows) && !cfg!(mio_unsupported_force_poll_poll) && n < len) { + // When mio is using the epoll or kqueue selector, reading a partially full + // buffer is sufficient to show that the socket buffer has been drained. + // + // This optimization does not work for level-triggered selectors such as + // windows or when poll is used. + // + // Read more: + // https://github.com/tokio-rs/tokio/issues/5866 + #[cfg(all( + not(mio_unsupported_force_poll_poll), + any( + // epoll + target_os = "android", + target_os = "illumos", + target_os = "linux", + target_os = "redox", + // kqueue + target_os = "dragonfly", + target_os = "freebsd", + target_os = "ios", + target_os = "macos", + target_os = "netbsd", + target_os = "openbsd", + target_os = "tvos", + target_os = "visionos", + target_os = "watchos", + ) + ))] + if 0 < n && n < len { self.registration.clear_readiness(evt); } From c8f3539bc11e57843745c68ee60ca5276248f9f9 Mon Sep 17 00:00:00 2001 From: sharpened-nacho <166434451+sharpened-nacho@users.noreply.github.com> Date: Tue, 2 Jul 2024 20:49:34 +0000 Subject: [PATCH 059/119] stream: make stream adapters public (#6658) --- tokio-stream/src/lib.rs | 16 ++++++++++++++- tokio-stream/src/stream_ext.rs | 32 +++++++++++++++--------------- tokio-stream/tests/stream_chain.rs | 11 +++++++++- 3 files changed, 41 insertions(+), 18 deletions(-) diff --git a/tokio-stream/src/lib.rs b/tokio-stream/src/lib.rs index 11ccd8c6aee..21f3fc92943 100644 --- a/tokio-stream/src/lib.rs +++ b/tokio-stream/src/lib.rs @@ -81,8 +81,22 @@ pub mod wrappers; mod stream_ext; pub use stream_ext::{collect::FromStream, StreamExt}; +/// Adapters for [`Stream`]s created by methods in [`StreamExt`]. +pub mod adapters { + pub use crate::stream_ext::{ + Chain, Filter, FilterMap, Fuse, Map, MapWhile, Merge, Peekable, Skip, SkipWhile, Take, + TakeWhile, Then, + }; + cfg_time! { + pub use crate::stream_ext::{ChunksTimeout, Timeout, TimeoutRepeating}; + } +} + cfg_time! { - pub use stream_ext::timeout::{Elapsed, Timeout}; + #[deprecated = "Import those symbols from adapters instead"] + #[doc(hidden)] + pub use stream_ext::timeout::Timeout; + pub use stream_ext::timeout::Elapsed; } mod empty; diff --git a/tokio-stream/src/stream_ext.rs b/tokio-stream/src/stream_ext.rs index cb640603dd2..cdbada30bc5 100644 --- a/tokio-stream/src/stream_ext.rs +++ b/tokio-stream/src/stream_ext.rs @@ -8,66 +8,66 @@ mod any; use any::AnyFuture; mod chain; -use chain::Chain; +pub use chain::Chain; pub(crate) mod collect; use collect::{Collect, FromStream}; mod filter; -use filter::Filter; +pub use filter::Filter; mod filter_map; -use filter_map::FilterMap; +pub use filter_map::FilterMap; mod fold; use fold::FoldFuture; mod fuse; -use fuse::Fuse; +pub use fuse::Fuse; mod map; -use map::Map; +pub use map::Map; mod map_while; -use map_while::MapWhile; +pub use map_while::MapWhile; mod merge; -use merge::Merge; +pub use merge::Merge; mod next; use next::Next; mod skip; -use skip::Skip; +pub use skip::Skip; mod skip_while; -use skip_while::SkipWhile; +pub use skip_while::SkipWhile; mod take; -use take::Take; +pub use take::Take; mod take_while; -use take_while::TakeWhile; +pub use take_while::TakeWhile; mod then; -use then::Then; +pub use then::Then; mod try_next; use try_next::TryNext; mod peekable; -use peekable::Peekable; +pub use peekable::Peekable; cfg_time! { pub(crate) mod timeout; pub(crate) mod timeout_repeating; - use timeout::Timeout; - use timeout_repeating::TimeoutRepeating; + pub use timeout::Timeout; + pub use timeout_repeating::TimeoutRepeating; use tokio::time::{Duration, Interval}; mod throttle; use throttle::{throttle, Throttle}; mod chunks_timeout; - use chunks_timeout::ChunksTimeout; + pub use chunks_timeout::ChunksTimeout; } /// An extension trait for the [`Stream`] trait that provides a variety of diff --git a/tokio-stream/tests/stream_chain.rs b/tokio-stream/tests/stream_chain.rs index f3b7edb16a6..4b47ce7a905 100644 --- a/tokio-stream/tests/stream_chain.rs +++ b/tokio-stream/tests/stream_chain.rs @@ -6,13 +6,14 @@ mod support { } use support::mpsc; +use tokio_stream::adapters::Chain; #[tokio::test] async fn basic_usage() { let one = stream::iter(vec![1, 2, 3]); let two = stream::iter(vec![4, 5, 6]); - let mut stream = one.chain(two); + let mut stream = visibility_test(one, two); assert_eq!(stream.size_hint(), (6, Some(6))); assert_eq!(stream.next().await, Some(1)); @@ -39,6 +40,14 @@ async fn basic_usage() { assert_eq!(stream.next().await, None); } +fn visibility_test(s1: S1, s2: S2) -> Chain +where + S1: Stream, + S2: Stream, +{ + s1.chain(s2) +} + #[tokio::test] async fn pending_first() { let (tx1, rx1) = mpsc::unbounded_channel_stream(); From 4825c444eb29b05c9c0b6f4a4c89475cb2556c65 Mon Sep 17 00:00:00 2001 From: Matthew Leach Date: Sun, 14 Jul 2024 05:38:23 +0100 Subject: [PATCH 060/119] test: fix tests when '-' is absent from kernel version (#6681) On my machine, any test that calls `is_pidfd_available` fails as my kernel string does not contain a '-'; the code expects there to be one. Fix the test so that is works regardless on whether the kernel string contains a '-'. --- tokio/src/process/unix/pidfd_reaper.rs | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/tokio/src/process/unix/pidfd_reaper.rs b/tokio/src/process/unix/pidfd_reaper.rs index 45d23471f84..3b7d622b34b 100644 --- a/tokio/src/process/unix/pidfd_reaper.rs +++ b/tokio/src/process/unix/pidfd_reaper.rs @@ -245,7 +245,12 @@ mod test { assert!(status.success()); let stdout = String::from_utf8_lossy(&stdout); - let mut kernel_version_iter = stdout.split_once('-').unwrap().0.split('.'); + let mut kernel_version_iter = match stdout.split_once('-') { + Some((version, _)) => version, + _ => &stdout, + } + .split('.'); + let major: u32 = kernel_version_iter.next().unwrap().parse().unwrap(); let minor: u32 = kernel_version_iter.next().unwrap().parse().unwrap(); From 15925efe436fdfc2c5a8e5b27c82dc6501d90317 Mon Sep 17 00:00:00 2001 From: Paolo Barbolini Date: Tue, 16 Jul 2024 12:13:41 +0200 Subject: [PATCH 061/119] macros: fix doc format issue (#6686) --- tokio-macros/src/lib.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tokio-macros/src/lib.rs b/tokio-macros/src/lib.rs index 860a0929952..b5d31c7f6dc 100644 --- a/tokio-macros/src/lib.rs +++ b/tokio-macros/src/lib.rs @@ -410,7 +410,7 @@ pub fn main_rt(args: TokenStream, item: TokenStream) -> TokenStream { /// ### Set number of worker threads /// /// ```no_run -/// #[tokio::test(flavor ="multi_thread", worker_threads = 2)] +/// #[tokio::test(flavor = "multi_thread", worker_threads = 2)] /// async fn my_test() { /// assert!(true); /// } From 24344dfe4b69931bfe9fe686d2424c9f626dc75b Mon Sep 17 00:00:00 2001 From: Weijia Jiang Date: Tue, 16 Jul 2024 21:25:59 +0800 Subject: [PATCH 062/119] time: fix race condition leading to lost timers (#6683) --- tokio/src/runtime/time/mod.rs | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/tokio/src/runtime/time/mod.rs b/tokio/src/runtime/time/mod.rs index 37b04ef0000..c01a5f2b25e 100644 --- a/tokio/src/runtime/time/mod.rs +++ b/tokio/src/runtime/time/mod.rs @@ -190,11 +190,13 @@ impl Driver { assert!(!handle.is_shutdown()); // Finds out the min expiration time to park. - let expiration_time = (0..rt_handle.time().inner.get_shard_size()) - .filter_map(|id| { - let lock = rt_handle.time().inner.lock_sharded_wheel(id); - lock.next_expiration_time() - }) + let locks = (0..rt_handle.time().inner.get_shard_size()) + .map(|id| rt_handle.time().inner.lock_sharded_wheel(id)) + .collect::>(); + + let expiration_time = locks + .iter() + .filter_map(|lock| lock.next_expiration_time()) .min(); rt_handle @@ -203,6 +205,9 @@ impl Driver { .next_wake .store(next_wake_time(expiration_time)); + // Safety: After updating the `next_wake`, we drop all the locks. + drop(locks); + match expiration_time { Some(when) => { let now = handle.time_source.now(rt_handle.clock()); From 14b9f7115728b77c82db8d21b6d768d16dc472a6 Mon Sep 17 00:00:00 2001 From: Weijia Jiang Date: Tue, 16 Jul 2024 23:16:29 +0800 Subject: [PATCH 063/119] chore: release Tokio v1.38.1 (#6688) --- README.md | 2 +- tokio/CHANGELOG.md | 12 ++++++++++++ tokio/Cargo.toml | 2 +- tokio/README.md | 2 +- 4 files changed, 15 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index b9d9eb785c3..6a3d0e2be66 100644 --- a/README.md +++ b/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.38.0", features = ["full"] } +tokio = { version = "1.38.1", features = ["full"] } ``` Then, on your main.rs: diff --git a/tokio/CHANGELOG.md b/tokio/CHANGELOG.md index acd3bacd5e6..cfe70fa4d52 100644 --- a/tokio/CHANGELOG.md +++ b/tokio/CHANGELOG.md @@ -1,3 +1,15 @@ +# 1.38.1 (July 16th, 2024) + +This release fixes the bug identified as ([#6682]), which caused timers not +to fire when they should. + +### Fixed + +- time: update `wake_up` while holding all the locks of sharded time wheels ([#6683]) + +[#6682]: https://github.com/tokio-rs/tokio/pull/6682 +[#6683]: https://github.com/tokio-rs/tokio/pull/6683 + # 1.38.0 (May 30th, 2024) This release marks the beginning of stabilization for runtime metrics. It diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index ac759515315..13a9a8c0579 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -6,7 +6,7 @@ name = "tokio" # - README.md # - Update CHANGELOG.md. # - Create "v1.x.y" git tag. -version = "1.38.0" +version = "1.38.1" edition = "2021" rust-version = "1.63" authors = ["Tokio Contributors "] diff --git a/tokio/README.md b/tokio/README.md index b9d9eb785c3..6a3d0e2be66 100644 --- a/tokio/README.md +++ b/tokio/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.38.0", features = ["full"] } +tokio = { version = "1.38.1", features = ["full"] } ``` Then, on your main.rs: From 1e286689ffc533a2d08c2f30c55ad46f9c3c5b93 Mon Sep 17 00:00:00 2001 From: Evan Rittenhouse Date: Tue, 16 Jul 2024 10:29:19 -0500 Subject: [PATCH 064/119] runtime: fix `yield_calls_park_before_scheduling_again` test (#6679) --- tokio/src/runtime/park.rs | 2 +- tokio/src/runtime/scheduler/multi_thread/park.rs | 10 ++++++++++ tokio/src/runtime/tests/loom_multi_thread/yield_now.rs | 1 - 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/tokio/src/runtime/park.rs b/tokio/src/runtime/park.rs index 2fa0f501c6d..cdc32dac50a 100644 --- a/tokio/src/runtime/park.rs +++ b/tokio/src/runtime/park.rs @@ -35,7 +35,7 @@ tokio_thread_local! { // Bit of a hack, but it is only for loom #[cfg(loom)] tokio_thread_local! { - static CURRENT_THREAD_PARK_COUNT: AtomicUsize = AtomicUsize::new(0); + pub(crate) static CURRENT_THREAD_PARK_COUNT: AtomicUsize = AtomicUsize::new(0); } // ==== impl ParkThread ==== diff --git a/tokio/src/runtime/scheduler/multi_thread/park.rs b/tokio/src/runtime/scheduler/multi_thread/park.rs index bc369387395..aacd9012cc3 100644 --- a/tokio/src/runtime/scheduler/multi_thread/park.rs +++ b/tokio/src/runtime/scheduler/multi_thread/park.rs @@ -10,6 +10,9 @@ use crate::util::TryLock; use std::sync::atomic::Ordering::SeqCst; use std::time::Duration; +#[cfg(loom)] +use crate::runtime::park::CURRENT_THREAD_PARK_COUNT; + pub(crate) struct Parker { inner: Arc, } @@ -73,6 +76,13 @@ impl Parker { if let Some(mut driver) = self.inner.shared.driver.try_lock() { driver.park_timeout(handle, duration); + } else { + // https://github.com/tokio-rs/tokio/issues/6536 + // Hacky, but it's just for loom tests. The counter gets incremented during + // `park_timeout`, but we still have to increment the counter if we can't acquire the + // lock. + #[cfg(loom)] + CURRENT_THREAD_PARK_COUNT.with(|count| count.fetch_add(1, SeqCst)); } } diff --git a/tokio/src/runtime/tests/loom_multi_thread/yield_now.rs b/tokio/src/runtime/tests/loom_multi_thread/yield_now.rs index f078669ddfa..ba506e5a408 100644 --- a/tokio/src/runtime/tests/loom_multi_thread/yield_now.rs +++ b/tokio/src/runtime/tests/loom_multi_thread/yield_now.rs @@ -3,7 +3,6 @@ use crate::runtime::tests::loom_oneshot as oneshot; use crate::runtime::{self, Runtime}; #[test] -#[ignore] fn yield_calls_park_before_scheduling_again() { // Don't need to check all permutations let mut loom = loom::model::Builder::default(); From fc058b95617720e4e1fed973f62c654657f9128d Mon Sep 17 00:00:00 2001 From: Motoyuki Kimura Date: Wed, 17 Jul 2024 02:34:09 +0900 Subject: [PATCH 065/119] io: update `tokio::io::stdout` documentation (#6674) --- tokio/src/io/stdout.rs | 50 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/tokio/src/io/stdout.rs b/tokio/src/io/stdout.rs index 7636fe9708c..b4621469202 100644 --- a/tokio/src/io/stdout.rs +++ b/tokio/src/io/stdout.rs @@ -33,6 +33,31 @@ cfg_io_std! { /// Ok(()) /// } /// ``` + /// + /// The following is an example of using `stdio` with loop. + /// + /// ``` + /// use tokio::io::{self, AsyncWriteExt}; + /// + /// #[tokio::main] + /// async fn main() { + /// let messages = vec!["hello", " world\n"]; + /// + /// // When you use `stdio` in a loop, it is recommended to create + /// // a single `stdio` instance outside the loop and call a write + /// // operation against that instance on each loop. + /// // + /// // Repeatedly creating `stdout` instances inside the loop and + /// // writing to that handle could result in mangled output since + /// // each write operation is handled by a different blocking thread. + /// let mut stdout = io::stdout(); + /// + /// for message in &messages { + /// stdout.write_all(message.as_bytes()).await.unwrap(); + /// stdout.flush().await.unwrap(); + /// } + /// } + /// ``` #[derive(Debug)] pub struct Stdout { std: SplitByUtf8BoundaryIfWindows>, @@ -64,6 +89,31 @@ cfg_io_std! { /// Ok(()) /// } /// ``` + /// + /// The following is an example of using `stdio` with loop. + /// + /// ``` + /// use tokio::io::{self, AsyncWriteExt}; + /// + /// #[tokio::main] + /// async fn main() { + /// let messages = vec!["hello", " world\n"]; + /// + /// // When you use `stdio` in a loop, it is recommended to create + /// // a single `stdio` instance outside the loop and call a write + /// // operation against that instance on each loop. + /// // + /// // Repeatedly creating `stdout` instances inside the loop and + /// // writing to that handle could result in mangled output since + /// // each write operation is handled by a different blocking thread. + /// let mut stdout = io::stdout(); + /// + /// for message in &messages { + /// stdout.write_all(message.as_bytes()).await.unwrap(); + /// stdout.flush().await.unwrap(); + /// } + /// } + /// ``` pub fn stdout() -> Stdout { let std = io::stdout(); Stdout { From f71bded94361323e9bddd52f3d13559887e76884 Mon Sep 17 00:00:00 2001 From: Ikko Eltociear Ashimine Date: Thu, 18 Jul 2024 18:05:16 +0900 Subject: [PATCH 066/119] sync: fix typo in name of test (#6693) --- tokio/tests/sync_watch.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tokio/tests/sync_watch.rs b/tokio/tests/sync_watch.rs index 7957c7da23f..17f0c81087a 100644 --- a/tokio/tests/sync_watch.rs +++ b/tokio/tests/sync_watch.rs @@ -355,7 +355,7 @@ async fn multiple_sender() { } #[tokio::test] -async fn reciever_is_notified_when_last_sender_is_dropped() { +async fn receiver_is_notified_when_last_sender_is_dropped() { let (tx1, mut rx) = watch::channel(0); let tx2 = tx1.clone(); From da17c6146413d9ea14f76989efe31ef7de829f4c Mon Sep 17 00:00:00 2001 From: Motoyuki Kimura Date: Thu, 18 Jul 2024 20:54:37 +0900 Subject: [PATCH 067/119] task: add size check for user-supplied future (#6692) --- tokio/src/runtime/blocking/pool.rs | 6 ++-- tokio/src/runtime/handle.rs | 16 +++++++++- tokio/src/runtime/mod.rs | 4 +++ tokio/src/runtime/runtime.rs | 16 +++++++++- tokio/src/task/builder.rs | 48 +++++++++++++++++++++++------- tokio/src/task/local.rs | 21 +++++++++++-- tokio/src/task/spawn.rs | 3 +- 7 files changed, 96 insertions(+), 18 deletions(-) diff --git a/tokio/src/runtime/blocking/pool.rs b/tokio/src/runtime/blocking/pool.rs index 2b283a56bba..20b23e00240 100644 --- a/tokio/src/runtime/blocking/pool.rs +++ b/tokio/src/runtime/blocking/pool.rs @@ -6,7 +6,7 @@ use crate::runtime::blocking::schedule::BlockingSchedule; use crate::runtime::blocking::{shutdown, BlockingTask}; use crate::runtime::builder::ThreadNameFn; use crate::runtime::task::{self, JoinHandle}; -use crate::runtime::{Builder, Callback, Handle}; +use crate::runtime::{Builder, Callback, Handle, BOX_FUTURE_THRESHOLD}; use crate::util::metric_atomics::MetricAtomicUsize; use std::collections::{HashMap, VecDeque}; @@ -296,7 +296,7 @@ impl Spawner { R: Send + 'static, { let (join_handle, spawn_result) = - if cfg!(debug_assertions) && std::mem::size_of::() > 2048 { + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { self.spawn_blocking_inner(Box::new(func), Mandatory::NonMandatory, None, rt) } else { self.spawn_blocking_inner(func, Mandatory::NonMandatory, None, rt) @@ -323,7 +323,7 @@ impl Spawner { F: FnOnce() -> R + Send + 'static, R: Send + 'static, { - let (join_handle, spawn_result) = if cfg!(debug_assertions) && std::mem::size_of::() > 2048 { + let (join_handle, spawn_result) = if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { self.spawn_blocking_inner( Box::new(func), Mandatory::Mandatory, diff --git a/tokio/src/runtime/handle.rs b/tokio/src/runtime/handle.rs index 5691a6e3bd2..64bc540c664 100644 --- a/tokio/src/runtime/handle.rs +++ b/tokio/src/runtime/handle.rs @@ -16,6 +16,7 @@ pub struct Handle { } use crate::runtime::task::JoinHandle; +use crate::runtime::BOX_FUTURE_THRESHOLD; use crate::util::error::{CONTEXT_MISSING_ERROR, THREAD_LOCAL_DESTROYED_ERROR}; use std::future::Future; @@ -188,7 +189,11 @@ impl Handle { F: Future + Send + 'static, F::Output: Send + 'static, { - self.spawn_named(future, None) + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { + self.spawn_named(Box::pin(future), None) + } else { + self.spawn_named(future, None) + } } /// Runs the provided function on an executor dedicated to blocking @@ -291,6 +296,15 @@ impl Handle { /// [`tokio::time`]: crate::time #[track_caller] pub fn block_on(&self, future: F) -> F::Output { + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { + self.block_on_inner(Box::pin(future)) + } else { + self.block_on_inner(future) + } + } + + #[track_caller] + fn block_on_inner(&self, future: F) -> F::Output { #[cfg(all( tokio_unstable, tokio_taskdump, diff --git a/tokio/src/runtime/mod.rs b/tokio/src/runtime/mod.rs index 3fcde75b54e..38a0285b3be 100644 --- a/tokio/src/runtime/mod.rs +++ b/tokio/src/runtime/mod.rs @@ -385,6 +385,10 @@ cfg_rt! { mod runtime; pub use runtime::{Runtime, RuntimeFlavor}; + /// Boundary value to prevent stack overflow caused by a large-sized + /// Future being placed in the stack. + pub(crate) const BOX_FUTURE_THRESHOLD: usize = 2048; + mod thread_id; pub(crate) use thread_id::ThreadId; diff --git a/tokio/src/runtime/runtime.rs b/tokio/src/runtime/runtime.rs index d904af50458..16f8718ab23 100644 --- a/tokio/src/runtime/runtime.rs +++ b/tokio/src/runtime/runtime.rs @@ -1,3 +1,4 @@ +use super::BOX_FUTURE_THRESHOLD; use crate::runtime::blocking::BlockingPool; use crate::runtime::scheduler::CurrentThread; use crate::runtime::{context, EnterGuard, Handle}; @@ -240,7 +241,11 @@ impl Runtime { F: Future + Send + 'static, F::Output: Send + 'static, { - self.handle.spawn(future) + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { + self.handle.spawn_named(Box::pin(future), None) + } else { + self.handle.spawn_named(future, None) + } } /// Runs the provided function on an executor dedicated to blocking operations. @@ -324,6 +329,15 @@ impl Runtime { /// [handle]: fn@Handle::block_on #[track_caller] pub fn block_on(&self, future: F) -> F::Output { + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { + self.block_on_inner(Box::pin(future)) + } else { + self.block_on_inner(future) + } + } + + #[track_caller] + fn block_on_inner(&self, future: F) -> F::Output { #[cfg(all( tokio_unstable, tokio_taskdump, diff --git a/tokio/src/task/builder.rs b/tokio/src/task/builder.rs index 306cc39d1eb..43d9322fceb 100644 --- a/tokio/src/task/builder.rs +++ b/tokio/src/task/builder.rs @@ -1,6 +1,6 @@ #![allow(unreachable_pub)] use crate::{ - runtime::Handle, + runtime::{Handle, BOX_FUTURE_THRESHOLD}, task::{JoinHandle, LocalSet}, }; use std::{future::Future, io}; @@ -88,7 +88,13 @@ impl<'a> Builder<'a> { Fut: Future + Send + 'static, Fut::Output: Send + 'static, { - Ok(super::spawn::spawn_inner(future, self.name)) + Ok( + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { + super::spawn::spawn_inner(Box::pin(future), self.name) + } else { + super::spawn::spawn_inner(future, self.name) + }, + ) } /// Spawn a task with this builder's settings on the provided [runtime @@ -104,7 +110,13 @@ impl<'a> Builder<'a> { Fut: Future + Send + 'static, Fut::Output: Send + 'static, { - Ok(handle.spawn_named(future, self.name)) + Ok( + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { + handle.spawn_named(Box::pin(future), self.name) + } else { + handle.spawn_named(future, self.name) + }, + ) } /// Spawns `!Send` a task on the current [`LocalSet`] with this builder's @@ -127,7 +139,13 @@ impl<'a> Builder<'a> { Fut: Future + 'static, Fut::Output: 'static, { - Ok(super::local::spawn_local_inner(future, self.name)) + Ok( + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { + super::local::spawn_local_inner(Box::pin(future), self.name) + } else { + super::local::spawn_local_inner(future, self.name) + }, + ) } /// Spawns `!Send` a task on the provided [`LocalSet`] with this builder's @@ -188,12 +206,22 @@ impl<'a> Builder<'a> { Output: Send + 'static, { use crate::runtime::Mandatory; - let (join_handle, spawn_result) = handle.inner.blocking_spawner().spawn_blocking_inner( - function, - Mandatory::NonMandatory, - self.name, - handle, - ); + let (join_handle, spawn_result) = + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { + handle.inner.blocking_spawner().spawn_blocking_inner( + Box::new(function), + Mandatory::NonMandatory, + self.name, + handle, + ) + } else { + handle.inner.blocking_spawner().spawn_blocking_inner( + function, + Mandatory::NonMandatory, + self.name, + handle, + ) + }; spawn_result?; Ok(join_handle) diff --git a/tokio/src/task/local.rs b/tokio/src/task/local.rs index d98697482cc..08d89c49c03 100644 --- a/tokio/src/task/local.rs +++ b/tokio/src/task/local.rs @@ -4,7 +4,7 @@ use crate::loom::sync::{Arc, Mutex}; #[cfg(tokio_unstable)] use crate::runtime; use crate::runtime::task::{self, JoinHandle, LocalOwnedTasks, Task}; -use crate::runtime::{context, ThreadId}; +use crate::runtime::{context, ThreadId, BOX_FUTURE_THRESHOLD}; use crate::sync::AtomicWaker; use crate::util::RcCell; @@ -367,7 +367,11 @@ cfg_rt! { F: Future + 'static, F::Output: 'static, { - spawn_local_inner(future, None) + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { + spawn_local_inner(Box::pin(future), None) + } else { + spawn_local_inner(future, None) + } } @@ -641,6 +645,19 @@ impl LocalSet { future: F, name: Option<&str>, ) -> JoinHandle + where + F: Future + 'static, + F::Output: 'static, + { + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { + self.spawn_named_inner(Box::pin(future), name) + } else { + self.spawn_named_inner(future, name) + } + } + + #[track_caller] + fn spawn_named_inner(&self, future: F, name: Option<&str>) -> JoinHandle where F: Future + 'static, F::Output: 'static, diff --git a/tokio/src/task/spawn.rs b/tokio/src/task/spawn.rs index a4498f47320..c9142cc5fad 100644 --- a/tokio/src/task/spawn.rs +++ b/tokio/src/task/spawn.rs @@ -1,3 +1,4 @@ +use crate::runtime::BOX_FUTURE_THRESHOLD; use crate::task::JoinHandle; use std::future::Future; @@ -168,7 +169,7 @@ cfg_rt! { { // preventing stack overflows on debug mode, by quickly sending the // task to the heap. - if cfg!(debug_assertions) && std::mem::size_of::() > 2048 { + if cfg!(debug_assertions) && std::mem::size_of::() > BOX_FUTURE_THRESHOLD { spawn_inner(Box::pin(future), None) } else { spawn_inner(future, None) From 1be8a8e691f48accda58874bf3a9241cea54daf4 Mon Sep 17 00:00:00 2001 From: Russell Cohen Date: Thu, 18 Jul 2024 16:08:29 -0400 Subject: [PATCH 068/119] metrics: stabilize `num_alive_tasks` (#6619) --- tokio/src/runtime/metrics/runtime.rs | 44 +- .../runtime/scheduler/current_thread/mod.rs | 8 +- tokio/src/runtime/scheduler/mod.rs | 8 +- .../scheduler/multi_thread/handle/metrics.rs | 8 +- .../multi_thread_alt/handle/metrics.rs | 4 +- tokio/src/runtime/task/list.rs | 2 +- tokio/tests/rt_metrics.rs | 724 +---------------- tokio/tests/rt_unstable_metrics.rs | 751 ++++++++++++++++++ 8 files changed, 789 insertions(+), 760 deletions(-) create mode 100644 tokio/tests/rt_unstable_metrics.rs diff --git a/tokio/src/runtime/metrics/runtime.rs b/tokio/src/runtime/metrics/runtime.rs index bdf7791bea9..fdbda6f3cb9 100644 --- a/tokio/src/runtime/metrics/runtime.rs +++ b/tokio/src/runtime/metrics/runtime.rs @@ -47,6 +47,28 @@ impl RuntimeMetrics { self.handle.inner.num_workers() } + /// Returns the current number of alive tasks in the runtime. + /// + /// This counter increases when a task is spawned and decreases when a + /// task exits. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let n = metrics.num_alive_tasks(); + /// println!("Runtime has {} alive tasks", n); + /// } + /// ``` + pub fn num_alive_tasks(&self) -> usize { + self.handle.inner.num_alive_tasks() + } + cfg_unstable_metrics! { /// Returns the number of additional threads spawned by the runtime. @@ -81,28 +103,6 @@ impl RuntimeMetrics { self.num_alive_tasks() } - /// Returns the current number of alive tasks in the runtime. - /// - /// This counter increases when a task is spawned and decreases when a - /// task exits. - /// - /// # Examples - /// - /// ``` - /// use tokio::runtime::Handle; - /// - /// #[tokio::main] - /// async fn main() { - /// let metrics = Handle::current().metrics(); - /// - /// let n = metrics.num_alive_tasks(); - /// println!("Runtime has {} alive tasks", n); - /// } - /// ``` - pub fn num_alive_tasks(&self) -> usize { - self.handle.inner.alive_tasks_count() - } - /// Returns the number of idle threads, which have spawned by the runtime /// for `spawn_blocking` calls. /// diff --git a/tokio/src/runtime/scheduler/current_thread/mod.rs b/tokio/src/runtime/scheduler/current_thread/mod.rs index b1e5df532ad..42a0a8822f4 100644 --- a/tokio/src/runtime/scheduler/current_thread/mod.rs +++ b/tokio/src/runtime/scheduler/current_thread/mod.rs @@ -500,6 +500,10 @@ impl Handle { pub(crate) fn reset_woken(&self) -> bool { self.shared.woken.swap(false, AcqRel) } + + pub(crate) fn num_alive_tasks(&self) -> usize { + self.shared.owned.num_alive_tasks() + } } cfg_unstable_metrics! { @@ -533,10 +537,6 @@ cfg_unstable_metrics! { self.blocking_spawner.queue_depth() } - pub(crate) fn alive_tasks_count(&self) -> usize { - self.shared.owned.alive_tasks_count() - } - cfg_64bit_metrics! { pub(crate) fn spawned_tasks_count(&self) -> u64 { self.shared.owned.spawned_tasks_count() diff --git a/tokio/src/runtime/scheduler/mod.rs b/tokio/src/runtime/scheduler/mod.rs index f6dc7ed6204..29c17d16465 100644 --- a/tokio/src/runtime/scheduler/mod.rs +++ b/tokio/src/runtime/scheduler/mod.rs @@ -173,6 +173,10 @@ cfg_rt! { Handle::MultiThreadAlt(handle) => handle.num_workers(), } } + + pub(crate) fn num_alive_tasks(&self) -> usize { + match_flavor!(self, Handle(handle) => handle.num_alive_tasks()) + } } cfg_unstable_metrics! { @@ -193,10 +197,6 @@ cfg_rt! { match_flavor!(self, Handle(handle) => handle.num_idle_blocking_threads()) } - pub(crate) fn alive_tasks_count(&self) -> usize { - match_flavor!(self, Handle(handle) => handle.alive_tasks_count()) - } - pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { match_flavor!(self, Handle(handle) => handle.scheduler_metrics()) } diff --git a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs index bc0723fe8dc..d2c61a2e9e3 100644 --- a/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs +++ b/tokio/src/runtime/scheduler/multi_thread/handle/metrics.rs @@ -9,6 +9,10 @@ impl Handle { self.shared.worker_metrics.len() } + pub(crate) fn num_alive_tasks(&self) -> usize { + self.shared.owned.num_alive_tasks() + } + cfg_unstable_metrics! { cfg_64bit_metrics! { pub(crate) fn spawned_tasks_count(&self) -> u64 { @@ -27,10 +31,6 @@ impl Handle { self.blocking_spawner.num_idle_threads() } - pub(crate) fn alive_tasks_count(&self) -> usize { - self.shared.owned.alive_tasks_count() - } - pub(crate) fn scheduler_metrics(&self) -> &SchedulerMetrics { &self.shared.scheduler_metrics } diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs b/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs index 6bb6e1aecb3..d54c349fb4b 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/handle/metrics.rs @@ -18,8 +18,8 @@ impl Handle { self.blocking_spawner.num_idle_threads() } - pub(crate) fn alive_tasks_count(&self) -> usize { - self.shared.owned.alive_tasks_count() + pub(crate) fn num_alive_tasks(&self) -> usize { + self.shared.owned.num_alive_tasks() } cfg_64bit_metrics! { diff --git a/tokio/src/runtime/task/list.rs b/tokio/src/runtime/task/list.rs index 63ff4567231..988d422836d 100644 --- a/tokio/src/runtime/task/list.rs +++ b/tokio/src/runtime/task/list.rs @@ -166,7 +166,7 @@ impl OwnedTasks { self.list.shard_size() } - pub(crate) fn alive_tasks_count(&self) -> usize { + pub(crate) fn num_alive_tasks(&self) -> usize { self.list.len() } diff --git a/tokio/tests/rt_metrics.rs b/tokio/tests/rt_metrics.rs index ff49e6a6129..1f2c447acdd 100644 --- a/tokio/tests/rt_metrics.rs +++ b/tokio/tests/rt_metrics.rs @@ -1,20 +1,8 @@ #![allow(unknown_lints, unexpected_cfgs)] #![warn(rust_2018_idioms)] -#![cfg(all( - feature = "full", - tokio_unstable, - not(target_os = "wasi"), - target_has_atomic = "64" -))] - -use std::future::Future; -use std::sync::{Arc, Barrier, Mutex}; -use std::task::Poll; -use tokio::macros::support::poll_fn; +#![cfg(all(feature = "full", not(target_os = "wasi"), target_has_atomic = "64"))] use tokio::runtime::Runtime; -use tokio::task::consume_budget; -use tokio::time::{self, Duration}; #[test] fn num_workers() { @@ -25,73 +13,6 @@ fn num_workers() { assert_eq!(2, rt.metrics().num_workers()); } -#[test] -fn num_blocking_threads() { - let rt = current_thread(); - assert_eq!(0, rt.metrics().num_blocking_threads()); - let _ = rt.block_on(rt.spawn_blocking(move || {})); - assert_eq!(1, rt.metrics().num_blocking_threads()); - - let rt = threaded(); - assert_eq!(0, rt.metrics().num_blocking_threads()); - let _ = rt.block_on(rt.spawn_blocking(move || {})); - assert_eq!(1, rt.metrics().num_blocking_threads()); -} - -#[test] -fn num_idle_blocking_threads() { - let rt = current_thread(); - assert_eq!(0, rt.metrics().num_idle_blocking_threads()); - let _ = rt.block_on(rt.spawn_blocking(move || {})); - rt.block_on(async { - time::sleep(Duration::from_millis(5)).await; - }); - - // We need to wait until the blocking thread has become idle. Usually 5ms is - // enough for this to happen, but not always. When it isn't enough, sleep - // for another second. We don't always wait for a whole second since we want - // the test suite to finish quickly. - // - // Note that the timeout for idle threads to be killed is 10 seconds. - if 0 == rt.metrics().num_idle_blocking_threads() { - rt.block_on(async { - time::sleep(Duration::from_secs(1)).await; - }); - } - - assert_eq!(1, rt.metrics().num_idle_blocking_threads()); -} - -#[test] -fn blocking_queue_depth() { - let rt = tokio::runtime::Builder::new_current_thread() - .enable_all() - .max_blocking_threads(1) - .build() - .unwrap(); - - assert_eq!(0, rt.metrics().blocking_queue_depth()); - - let ready = Arc::new(Mutex::new(())); - let guard = ready.lock().unwrap(); - - let ready_cloned = ready.clone(); - let wait_until_ready = move || { - let _unused = ready_cloned.lock().unwrap(); - }; - - let h1 = rt.spawn_blocking(wait_until_ready.clone()); - let h2 = rt.spawn_blocking(wait_until_ready); - assert!(rt.metrics().blocking_queue_depth() > 0); - - drop(guard); - - let _ = rt.block_on(h1); - let _ = rt.block_on(h2); - - assert_eq!(0, rt.metrics().blocking_queue_depth()); -} - #[test] fn num_alive_tasks() { let rt = current_thread(); @@ -124,636 +45,6 @@ fn num_alive_tasks() { assert_eq!(0, rt.metrics().num_alive_tasks()); } -#[test] -fn spawned_tasks_count() { - let rt = current_thread(); - let metrics = rt.metrics(); - assert_eq!(0, metrics.spawned_tasks_count()); - - rt.block_on(rt.spawn(async move { - assert_eq!(1, metrics.spawned_tasks_count()); - })) - .unwrap(); - - assert_eq!(1, rt.metrics().spawned_tasks_count()); - - let rt = threaded(); - let metrics = rt.metrics(); - assert_eq!(0, metrics.spawned_tasks_count()); - - rt.block_on(rt.spawn(async move { - assert_eq!(1, metrics.spawned_tasks_count()); - })) - .unwrap(); - - assert_eq!(1, rt.metrics().spawned_tasks_count()); -} - -#[test] -fn remote_schedule_count() { - use std::thread; - - let rt = current_thread(); - let handle = rt.handle().clone(); - let task = thread::spawn(move || { - handle.spawn(async { - // DO nothing - }) - }) - .join() - .unwrap(); - - rt.block_on(task).unwrap(); - - assert_eq!(1, rt.metrics().remote_schedule_count()); - - let rt = threaded(); - let handle = rt.handle().clone(); - let task = thread::spawn(move || { - handle.spawn(async { - // DO nothing - }) - }) - .join() - .unwrap(); - - rt.block_on(task).unwrap(); - - assert_eq!(1, rt.metrics().remote_schedule_count()); -} - -#[test] -fn worker_park_count() { - let rt = current_thread(); - let metrics = rt.metrics(); - rt.block_on(async { - time::sleep(Duration::from_millis(1)).await; - }); - drop(rt); - assert!(1 <= metrics.worker_park_count(0)); - - let rt = threaded(); - let metrics = rt.metrics(); - rt.block_on(async { - time::sleep(Duration::from_millis(1)).await; - }); - drop(rt); - assert!(1 <= metrics.worker_park_count(0)); - assert!(1 <= metrics.worker_park_count(1)); -} - -#[test] -fn worker_noop_count() { - // There isn't really a great way to generate no-op parks as they happen as - // false-positive events under concurrency. - - let rt = current_thread(); - let metrics = rt.metrics(); - rt.block_on(async { - time::sleep(Duration::from_millis(1)).await; - }); - drop(rt); - assert!(0 < metrics.worker_noop_count(0)); - - let rt = threaded(); - let metrics = rt.metrics(); - rt.block_on(async { - time::sleep(Duration::from_millis(1)).await; - }); - drop(rt); - assert!(0 < metrics.worker_noop_count(0)); - assert!(0 < metrics.worker_noop_count(1)); -} - -#[test] -#[ignore] // this test is flaky, see https://github.com/tokio-rs/tokio/issues/6470 -fn worker_steal_count() { - // This metric only applies to the multi-threaded runtime. - // - // We use a blocking channel to backup one worker thread. - use std::sync::mpsc::channel; - - let rt = threaded_no_lifo(); - let metrics = rt.metrics(); - - rt.block_on(async { - let (tx, rx) = channel(); - - // Move to the runtime. - tokio::spawn(async move { - // Spawn the task that sends to the channel - // - // Since the lifo slot is disabled, this task is stealable. - tokio::spawn(async move { - tx.send(()).unwrap(); - }); - - // Blocking receive on the channel. - rx.recv().unwrap(); - }) - .await - .unwrap(); - }); - - drop(rt); - - let n: u64 = (0..metrics.num_workers()) - .map(|i| metrics.worker_steal_count(i)) - .sum(); - - assert_eq!(1, n); -} - -#[test] -fn worker_poll_count_and_time() { - const N: u64 = 5; - - async fn task() { - // Sync sleep - std::thread::sleep(std::time::Duration::from_micros(10)); - } - - let rt = current_thread(); - let metrics = rt.metrics(); - rt.block_on(async { - for _ in 0..N { - tokio::spawn(task()).await.unwrap(); - } - }); - drop(rt); - assert_eq!(N, metrics.worker_poll_count(0)); - // Not currently supported for current-thread runtime - assert_eq!(Duration::default(), metrics.worker_mean_poll_time(0)); - - // Does not populate the histogram - assert!(!metrics.poll_count_histogram_enabled()); - for i in 0..10 { - assert_eq!(0, metrics.poll_count_histogram_bucket_count(0, i)); - } - - let rt = threaded(); - let metrics = rt.metrics(); - rt.block_on(async { - for _ in 0..N { - tokio::spawn(task()).await.unwrap(); - } - }); - drop(rt); - // Account for the `block_on` task - let n = (0..metrics.num_workers()) - .map(|i| metrics.worker_poll_count(i)) - .sum(); - - assert_eq!(N, n); - - let n: Duration = (0..metrics.num_workers()) - .map(|i| metrics.worker_mean_poll_time(i)) - .sum(); - - assert!(n > Duration::default()); - - // Does not populate the histogram - assert!(!metrics.poll_count_histogram_enabled()); - for n in 0..metrics.num_workers() { - for i in 0..10 { - assert_eq!(0, metrics.poll_count_histogram_bucket_count(n, i)); - } - } -} - -#[test] -fn worker_poll_count_histogram() { - const N: u64 = 5; - - let rts = [ - tokio::runtime::Builder::new_current_thread() - .enable_all() - .enable_metrics_poll_count_histogram() - .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Linear) - .metrics_poll_count_histogram_buckets(3) - .metrics_poll_count_histogram_resolution(Duration::from_millis(50)) - .build() - .unwrap(), - tokio::runtime::Builder::new_multi_thread() - .worker_threads(2) - .enable_all() - .enable_metrics_poll_count_histogram() - .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Linear) - .metrics_poll_count_histogram_buckets(3) - .metrics_poll_count_histogram_resolution(Duration::from_millis(50)) - .build() - .unwrap(), - ]; - - for rt in rts { - let metrics = rt.metrics(); - rt.block_on(async { - for _ in 0..N { - tokio::spawn(async {}).await.unwrap(); - } - }); - drop(rt); - - let num_workers = metrics.num_workers(); - let num_buckets = metrics.poll_count_histogram_num_buckets(); - - assert!(metrics.poll_count_histogram_enabled()); - assert_eq!(num_buckets, 3); - - let n = (0..num_workers) - .flat_map(|i| (0..num_buckets).map(move |j| (i, j))) - .map(|(worker, bucket)| metrics.poll_count_histogram_bucket_count(worker, bucket)) - .sum(); - assert_eq!(N, n); - } -} - -#[test] -fn worker_poll_count_histogram_range() { - let max = Duration::from_nanos(u64::MAX); - - let rt = tokio::runtime::Builder::new_current_thread() - .enable_all() - .enable_metrics_poll_count_histogram() - .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Linear) - .metrics_poll_count_histogram_buckets(3) - .metrics_poll_count_histogram_resolution(us(50)) - .build() - .unwrap(); - let metrics = rt.metrics(); - - assert_eq!(metrics.poll_count_histogram_bucket_range(0), us(0)..us(50)); - assert_eq!( - metrics.poll_count_histogram_bucket_range(1), - us(50)..us(100) - ); - assert_eq!(metrics.poll_count_histogram_bucket_range(2), us(100)..max); - - let rt = tokio::runtime::Builder::new_current_thread() - .enable_all() - .enable_metrics_poll_count_histogram() - .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Log) - .metrics_poll_count_histogram_buckets(3) - .metrics_poll_count_histogram_resolution(us(50)) - .build() - .unwrap(); - let metrics = rt.metrics(); - - let a = Duration::from_nanos(50000_u64.next_power_of_two()); - let b = a * 2; - - assert_eq!(metrics.poll_count_histogram_bucket_range(0), us(0)..a); - assert_eq!(metrics.poll_count_histogram_bucket_range(1), a..b); - assert_eq!(metrics.poll_count_histogram_bucket_range(2), b..max); -} - -#[test] -fn worker_poll_count_histogram_disabled_without_explicit_enable() { - let rts = [ - tokio::runtime::Builder::new_current_thread() - .enable_all() - .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Linear) - .metrics_poll_count_histogram_buckets(3) - .metrics_poll_count_histogram_resolution(Duration::from_millis(50)) - .build() - .unwrap(), - tokio::runtime::Builder::new_multi_thread() - .worker_threads(2) - .enable_all() - .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Linear) - .metrics_poll_count_histogram_buckets(3) - .metrics_poll_count_histogram_resolution(Duration::from_millis(50)) - .build() - .unwrap(), - ]; - - for rt in rts { - let metrics = rt.metrics(); - assert!(!metrics.poll_count_histogram_enabled()); - } -} - -#[test] -fn worker_total_busy_duration() { - const N: usize = 5; - - let zero = Duration::from_millis(0); - - let rt = current_thread(); - let metrics = rt.metrics(); - - rt.block_on(async { - for _ in 0..N { - tokio::spawn(async { - tokio::task::yield_now().await; - }) - .await - .unwrap(); - } - }); - - drop(rt); - - assert!(zero < metrics.worker_total_busy_duration(0)); - - let rt = threaded(); - let metrics = rt.metrics(); - - rt.block_on(async { - for _ in 0..N { - tokio::spawn(async { - tokio::task::yield_now().await; - }) - .await - .unwrap(); - } - }); - - drop(rt); - - for i in 0..metrics.num_workers() { - assert!(zero < metrics.worker_total_busy_duration(i)); - } -} - -#[test] -fn worker_local_schedule_count() { - let rt = current_thread(); - let metrics = rt.metrics(); - rt.block_on(async { - tokio::spawn(async {}).await.unwrap(); - }); - drop(rt); - - assert_eq!(1, metrics.worker_local_schedule_count(0)); - assert_eq!(0, metrics.remote_schedule_count()); - - let rt = threaded(); - let metrics = rt.metrics(); - rt.block_on(async { - // Move to the runtime - tokio::spawn(async { - tokio::spawn(async {}).await.unwrap(); - }) - .await - .unwrap(); - }); - drop(rt); - - let n: u64 = (0..metrics.num_workers()) - .map(|i| metrics.worker_local_schedule_count(i)) - .sum(); - - assert_eq!(2, n); - assert_eq!(1, metrics.remote_schedule_count()); -} - -#[test] -fn worker_overflow_count() { - // Only applies to the threaded worker - let rt = threaded(); - let metrics = rt.metrics(); - rt.block_on(async { - // Move to the runtime - tokio::spawn(async { - let (tx1, rx1) = std::sync::mpsc::channel(); - let (tx2, rx2) = std::sync::mpsc::channel(); - - // First, we need to block the other worker until all tasks have - // been spawned. - // - // We spawn from outside the runtime to ensure that the other worker - // will pick it up: - // - tokio::task::spawn_blocking(|| { - tokio::spawn(async move { - tx1.send(()).unwrap(); - rx2.recv().unwrap(); - }); - }); - - rx1.recv().unwrap(); - - // Spawn many tasks - for _ in 0..300 { - tokio::spawn(async {}); - } - - tx2.send(()).unwrap(); - }) - .await - .unwrap(); - }); - drop(rt); - - let n: u64 = (0..metrics.num_workers()) - .map(|i| metrics.worker_overflow_count(i)) - .sum(); - - assert_eq!(1, n); -} - -#[test] -fn injection_queue_depth_current_thread() { - use std::thread; - - let rt = current_thread(); - let handle = rt.handle().clone(); - let metrics = rt.metrics(); - - thread::spawn(move || { - handle.spawn(async {}); - }) - .join() - .unwrap(); - - assert_eq!(1, metrics.injection_queue_depth()); -} - -#[test] -fn injection_queue_depth_multi_thread() { - let rt = threaded(); - let metrics = rt.metrics(); - - let barrier1 = Arc::new(Barrier::new(3)); - let barrier2 = Arc::new(Barrier::new(3)); - - // Spawn a task per runtime worker to block it. - for _ in 0..2 { - let barrier1 = barrier1.clone(); - let barrier2 = barrier2.clone(); - rt.spawn(async move { - barrier1.wait(); - barrier2.wait(); - }); - } - - barrier1.wait(); - - for i in 0..10 { - assert_eq!(i, metrics.injection_queue_depth()); - rt.spawn(async {}); - } - - barrier2.wait(); -} - -#[test] -fn worker_local_queue_depth() { - const N: usize = 100; - - let rt = current_thread(); - let metrics = rt.metrics(); - rt.block_on(async { - for _ in 0..N { - tokio::spawn(async {}); - } - - assert_eq!(N, metrics.worker_local_queue_depth(0)); - }); - - let rt = threaded(); - let metrics = rt.metrics(); - rt.block_on(async move { - // Move to the runtime - tokio::spawn(async move { - let (tx1, rx1) = std::sync::mpsc::channel(); - let (tx2, rx2) = std::sync::mpsc::channel(); - - // First, we need to block the other worker until all tasks have - // been spawned. - tokio::spawn(async move { - tx1.send(()).unwrap(); - rx2.recv().unwrap(); - }); - - // Bump the next-run spawn - tokio::spawn(async {}); - - rx1.recv().unwrap(); - - // Spawn some tasks - for _ in 0..100 { - tokio::spawn(async {}); - } - - let n: usize = (0..metrics.num_workers()) - .map(|i| metrics.worker_local_queue_depth(i)) - .sum(); - - assert_eq!(n, N); - - tx2.send(()).unwrap(); - }) - .await - .unwrap(); - }); -} - -#[test] -fn budget_exhaustion_yield() { - let rt = current_thread(); - let metrics = rt.metrics(); - - assert_eq!(0, metrics.budget_forced_yield_count()); - - let mut did_yield = false; - - // block on a task which consumes budget until it yields - rt.block_on(poll_fn(|cx| loop { - if did_yield { - return Poll::Ready(()); - } - - let fut = consume_budget(); - tokio::pin!(fut); - - if fut.poll(cx).is_pending() { - did_yield = true; - return Poll::Pending; - } - })); - - assert_eq!(1, rt.metrics().budget_forced_yield_count()); -} - -#[test] -fn budget_exhaustion_yield_with_joins() { - let rt = current_thread(); - let metrics = rt.metrics(); - - assert_eq!(0, metrics.budget_forced_yield_count()); - - let mut did_yield_1 = false; - let mut did_yield_2 = false; - - // block on a task which consumes budget until it yields - rt.block_on(async { - tokio::join!( - poll_fn(|cx| loop { - if did_yield_1 { - return Poll::Ready(()); - } - - let fut = consume_budget(); - tokio::pin!(fut); - - if fut.poll(cx).is_pending() { - did_yield_1 = true; - return Poll::Pending; - } - }), - poll_fn(|cx| loop { - if did_yield_2 { - return Poll::Ready(()); - } - - let fut = consume_budget(); - tokio::pin!(fut); - - if fut.poll(cx).is_pending() { - did_yield_2 = true; - return Poll::Pending; - } - }) - ) - }); - - assert_eq!(1, rt.metrics().budget_forced_yield_count()); -} - -#[cfg(any(target_os = "linux", target_os = "macos"))] -#[test] -fn io_driver_fd_count() { - let rt = current_thread(); - let metrics = rt.metrics(); - - assert_eq!(metrics.io_driver_fd_registered_count(), 0); - - let stream = tokio::net::TcpStream::connect("google.com:80"); - let stream = rt.block_on(async move { stream.await.unwrap() }); - - assert_eq!(metrics.io_driver_fd_registered_count(), 1); - assert_eq!(metrics.io_driver_fd_deregistered_count(), 0); - - drop(stream); - - assert_eq!(metrics.io_driver_fd_deregistered_count(), 1); - assert_eq!(metrics.io_driver_fd_registered_count(), 1); -} - -#[cfg(any(target_os = "linux", target_os = "macos"))] -#[test] -fn io_driver_ready_count() { - let rt = current_thread(); - let metrics = rt.metrics(); - - let stream = tokio::net::TcpStream::connect("google.com:80"); - let _stream = rt.block_on(async move { stream.await.unwrap() }); - - assert_eq!(metrics.io_driver_ready_count(), 1); -} - fn current_thread() -> Runtime { tokio::runtime::Builder::new_current_thread() .enable_all() @@ -768,16 +59,3 @@ fn threaded() -> Runtime { .build() .unwrap() } - -fn threaded_no_lifo() -> Runtime { - tokio::runtime::Builder::new_multi_thread() - .worker_threads(2) - .disable_lifo_slot() - .enable_all() - .build() - .unwrap() -} - -fn us(n: u64) -> Duration { - Duration::from_micros(n) -} diff --git a/tokio/tests/rt_unstable_metrics.rs b/tokio/tests/rt_unstable_metrics.rs new file mode 100644 index 00000000000..6640c524a69 --- /dev/null +++ b/tokio/tests/rt_unstable_metrics.rs @@ -0,0 +1,751 @@ +#![allow(unknown_lints, unexpected_cfgs)] +#![warn(rust_2018_idioms)] +#![cfg(all( + feature = "full", + tokio_unstable, + not(target_os = "wasi"), + target_has_atomic = "64" +))] + +use std::future::Future; +use std::sync::{Arc, Barrier, Mutex}; +use std::task::Poll; +use tokio::macros::support::poll_fn; + +use tokio::runtime::Runtime; +use tokio::task::consume_budget; +use tokio::time::{self, Duration}; + +#[test] +fn num_workers() { + let rt = current_thread(); + assert_eq!(1, rt.metrics().num_workers()); + + let rt = threaded(); + assert_eq!(2, rt.metrics().num_workers()); +} + +#[test] +fn num_blocking_threads() { + let rt = current_thread(); + assert_eq!(0, rt.metrics().num_blocking_threads()); + let _ = rt.block_on(rt.spawn_blocking(move || {})); + assert_eq!(1, rt.metrics().num_blocking_threads()); + + let rt = threaded(); + assert_eq!(0, rt.metrics().num_blocking_threads()); + let _ = rt.block_on(rt.spawn_blocking(move || {})); + assert_eq!(1, rt.metrics().num_blocking_threads()); +} + +#[test] +fn num_idle_blocking_threads() { + let rt = current_thread(); + assert_eq!(0, rt.metrics().num_idle_blocking_threads()); + let _ = rt.block_on(rt.spawn_blocking(move || {})); + rt.block_on(async { + time::sleep(Duration::from_millis(5)).await; + }); + + // We need to wait until the blocking thread has become idle. Usually 5ms is + // enough for this to happen, but not always. When it isn't enough, sleep + // for another second. We don't always wait for a whole second since we want + // the test suite to finish quickly. + // + // Note that the timeout for idle threads to be killed is 10 seconds. + if 0 == rt.metrics().num_idle_blocking_threads() { + rt.block_on(async { + time::sleep(Duration::from_secs(1)).await; + }); + } + + assert_eq!(1, rt.metrics().num_idle_blocking_threads()); +} + +#[test] +fn blocking_queue_depth() { + let rt = tokio::runtime::Builder::new_current_thread() + .enable_all() + .max_blocking_threads(1) + .build() + .unwrap(); + + assert_eq!(0, rt.metrics().blocking_queue_depth()); + + let ready = Arc::new(Mutex::new(())); + let guard = ready.lock().unwrap(); + + let ready_cloned = ready.clone(); + let wait_until_ready = move || { + let _unused = ready_cloned.lock().unwrap(); + }; + + let h1 = rt.spawn_blocking(wait_until_ready.clone()); + let h2 = rt.spawn_blocking(wait_until_ready); + assert!(rt.metrics().blocking_queue_depth() > 0); + + drop(guard); + + let _ = rt.block_on(h1); + let _ = rt.block_on(h2); + + assert_eq!(0, rt.metrics().blocking_queue_depth()); +} + +#[test] +fn spawned_tasks_count() { + let rt = current_thread(); + let metrics = rt.metrics(); + assert_eq!(0, metrics.spawned_tasks_count()); + + rt.block_on(rt.spawn(async move { + assert_eq!(1, metrics.spawned_tasks_count()); + })) + .unwrap(); + + assert_eq!(1, rt.metrics().spawned_tasks_count()); + + let rt = threaded(); + let metrics = rt.metrics(); + assert_eq!(0, metrics.spawned_tasks_count()); + + rt.block_on(rt.spawn(async move { + assert_eq!(1, metrics.spawned_tasks_count()); + })) + .unwrap(); + + assert_eq!(1, rt.metrics().spawned_tasks_count()); +} + +#[test] +fn remote_schedule_count() { + use std::thread; + + let rt = current_thread(); + let handle = rt.handle().clone(); + let task = thread::spawn(move || { + handle.spawn(async { + // DO nothing + }) + }) + .join() + .unwrap(); + + rt.block_on(task).unwrap(); + + assert_eq!(1, rt.metrics().remote_schedule_count()); + + let rt = threaded(); + let handle = rt.handle().clone(); + let task = thread::spawn(move || { + handle.spawn(async { + // DO nothing + }) + }) + .join() + .unwrap(); + + rt.block_on(task).unwrap(); + + assert_eq!(1, rt.metrics().remote_schedule_count()); +} + +#[test] +fn worker_park_count() { + let rt = current_thread(); + let metrics = rt.metrics(); + rt.block_on(async { + time::sleep(Duration::from_millis(1)).await; + }); + drop(rt); + assert!(1 <= metrics.worker_park_count(0)); + + let rt = threaded(); + let metrics = rt.metrics(); + rt.block_on(async { + time::sleep(Duration::from_millis(1)).await; + }); + drop(rt); + assert!(1 <= metrics.worker_park_count(0)); + assert!(1 <= metrics.worker_park_count(1)); +} + +#[test] +fn worker_noop_count() { + // There isn't really a great way to generate no-op parks as they happen as + // false-positive events under concurrency. + + let rt = current_thread(); + let metrics = rt.metrics(); + rt.block_on(async { + time::sleep(Duration::from_millis(1)).await; + }); + drop(rt); + assert!(0 < metrics.worker_noop_count(0)); + + let rt = threaded(); + let metrics = rt.metrics(); + rt.block_on(async { + time::sleep(Duration::from_millis(1)).await; + }); + drop(rt); + assert!(0 < metrics.worker_noop_count(0)); + assert!(0 < metrics.worker_noop_count(1)); +} + +#[test] +#[ignore] // this test is flaky, see https://github.com/tokio-rs/tokio/issues/6470 +fn worker_steal_count() { + // This metric only applies to the multi-threaded runtime. + // + // We use a blocking channel to backup one worker thread. + use std::sync::mpsc::channel; + + let rt = threaded_no_lifo(); + let metrics = rt.metrics(); + + rt.block_on(async { + let (tx, rx) = channel(); + + // Move to the runtime. + tokio::spawn(async move { + // Spawn the task that sends to the channel + // + // Since the lifo slot is disabled, this task is stealable. + tokio::spawn(async move { + tx.send(()).unwrap(); + }); + + // Blocking receive on the channel. + rx.recv().unwrap(); + }) + .await + .unwrap(); + }); + + drop(rt); + + let n: u64 = (0..metrics.num_workers()) + .map(|i| metrics.worker_steal_count(i)) + .sum(); + + assert_eq!(1, n); +} + +#[test] +fn worker_poll_count_and_time() { + const N: u64 = 5; + + async fn task() { + // Sync sleep + std::thread::sleep(std::time::Duration::from_micros(10)); + } + + let rt = current_thread(); + let metrics = rt.metrics(); + rt.block_on(async { + for _ in 0..N { + tokio::spawn(task()).await.unwrap(); + } + }); + drop(rt); + assert_eq!(N, metrics.worker_poll_count(0)); + // Not currently supported for current-thread runtime + assert_eq!(Duration::default(), metrics.worker_mean_poll_time(0)); + + // Does not populate the histogram + assert!(!metrics.poll_count_histogram_enabled()); + for i in 0..10 { + assert_eq!(0, metrics.poll_count_histogram_bucket_count(0, i)); + } + + let rt = threaded(); + let metrics = rt.metrics(); + rt.block_on(async { + for _ in 0..N { + tokio::spawn(task()).await.unwrap(); + } + }); + drop(rt); + // Account for the `block_on` task + let n = (0..metrics.num_workers()) + .map(|i| metrics.worker_poll_count(i)) + .sum(); + + assert_eq!(N, n); + + let n: Duration = (0..metrics.num_workers()) + .map(|i| metrics.worker_mean_poll_time(i)) + .sum(); + + assert!(n > Duration::default()); + + // Does not populate the histogram + assert!(!metrics.poll_count_histogram_enabled()); + for n in 0..metrics.num_workers() { + for i in 0..10 { + assert_eq!(0, metrics.poll_count_histogram_bucket_count(n, i)); + } + } +} + +#[test] +fn worker_poll_count_histogram() { + const N: u64 = 5; + + let rts = [ + tokio::runtime::Builder::new_current_thread() + .enable_all() + .enable_metrics_poll_count_histogram() + .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Linear) + .metrics_poll_count_histogram_buckets(3) + .metrics_poll_count_histogram_resolution(Duration::from_millis(50)) + .build() + .unwrap(), + tokio::runtime::Builder::new_multi_thread() + .worker_threads(2) + .enable_all() + .enable_metrics_poll_count_histogram() + .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Linear) + .metrics_poll_count_histogram_buckets(3) + .metrics_poll_count_histogram_resolution(Duration::from_millis(50)) + .build() + .unwrap(), + ]; + + for rt in rts { + let metrics = rt.metrics(); + rt.block_on(async { + for _ in 0..N { + tokio::spawn(async {}).await.unwrap(); + } + }); + drop(rt); + + let num_workers = metrics.num_workers(); + let num_buckets = metrics.poll_count_histogram_num_buckets(); + + assert!(metrics.poll_count_histogram_enabled()); + assert_eq!(num_buckets, 3); + + let n = (0..num_workers) + .flat_map(|i| (0..num_buckets).map(move |j| (i, j))) + .map(|(worker, bucket)| metrics.poll_count_histogram_bucket_count(worker, bucket)) + .sum(); + assert_eq!(N, n); + } +} + +#[test] +fn worker_poll_count_histogram_range() { + let max = Duration::from_nanos(u64::MAX); + + let rt = tokio::runtime::Builder::new_current_thread() + .enable_all() + .enable_metrics_poll_count_histogram() + .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Linear) + .metrics_poll_count_histogram_buckets(3) + .metrics_poll_count_histogram_resolution(us(50)) + .build() + .unwrap(); + let metrics = rt.metrics(); + + assert_eq!(metrics.poll_count_histogram_bucket_range(0), us(0)..us(50)); + assert_eq!( + metrics.poll_count_histogram_bucket_range(1), + us(50)..us(100) + ); + assert_eq!(metrics.poll_count_histogram_bucket_range(2), us(100)..max); + + let rt = tokio::runtime::Builder::new_current_thread() + .enable_all() + .enable_metrics_poll_count_histogram() + .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Log) + .metrics_poll_count_histogram_buckets(3) + .metrics_poll_count_histogram_resolution(us(50)) + .build() + .unwrap(); + let metrics = rt.metrics(); + + let a = Duration::from_nanos(50000_u64.next_power_of_two()); + let b = a * 2; + + assert_eq!(metrics.poll_count_histogram_bucket_range(0), us(0)..a); + assert_eq!(metrics.poll_count_histogram_bucket_range(1), a..b); + assert_eq!(metrics.poll_count_histogram_bucket_range(2), b..max); +} + +#[test] +fn worker_poll_count_histogram_disabled_without_explicit_enable() { + let rts = [ + tokio::runtime::Builder::new_current_thread() + .enable_all() + .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Linear) + .metrics_poll_count_histogram_buckets(3) + .metrics_poll_count_histogram_resolution(Duration::from_millis(50)) + .build() + .unwrap(), + tokio::runtime::Builder::new_multi_thread() + .worker_threads(2) + .enable_all() + .metrics_poll_count_histogram_scale(tokio::runtime::HistogramScale::Linear) + .metrics_poll_count_histogram_buckets(3) + .metrics_poll_count_histogram_resolution(Duration::from_millis(50)) + .build() + .unwrap(), + ]; + + for rt in rts { + let metrics = rt.metrics(); + assert!(!metrics.poll_count_histogram_enabled()); + } +} + +#[test] +fn worker_total_busy_duration() { + const N: usize = 5; + + let zero = Duration::from_millis(0); + + let rt = current_thread(); + let metrics = rt.metrics(); + + rt.block_on(async { + for _ in 0..N { + tokio::spawn(async { + tokio::task::yield_now().await; + }) + .await + .unwrap(); + } + }); + + drop(rt); + + assert!(zero < metrics.worker_total_busy_duration(0)); + + let rt = threaded(); + let metrics = rt.metrics(); + + rt.block_on(async { + for _ in 0..N { + tokio::spawn(async { + tokio::task::yield_now().await; + }) + .await + .unwrap(); + } + }); + + drop(rt); + + for i in 0..metrics.num_workers() { + assert!(zero < metrics.worker_total_busy_duration(i)); + } +} + +#[test] +fn worker_local_schedule_count() { + let rt = current_thread(); + let metrics = rt.metrics(); + rt.block_on(async { + tokio::spawn(async {}).await.unwrap(); + }); + drop(rt); + + assert_eq!(1, metrics.worker_local_schedule_count(0)); + assert_eq!(0, metrics.remote_schedule_count()); + + let rt = threaded(); + let metrics = rt.metrics(); + rt.block_on(async { + // Move to the runtime + tokio::spawn(async { + tokio::spawn(async {}).await.unwrap(); + }) + .await + .unwrap(); + }); + drop(rt); + + let n: u64 = (0..metrics.num_workers()) + .map(|i| metrics.worker_local_schedule_count(i)) + .sum(); + + assert_eq!(2, n); + assert_eq!(1, metrics.remote_schedule_count()); +} + +#[test] +fn worker_overflow_count() { + // Only applies to the threaded worker + let rt = threaded(); + let metrics = rt.metrics(); + rt.block_on(async { + // Move to the runtime + tokio::spawn(async { + let (tx1, rx1) = std::sync::mpsc::channel(); + let (tx2, rx2) = std::sync::mpsc::channel(); + + // First, we need to block the other worker until all tasks have + // been spawned. + // + // We spawn from outside the runtime to ensure that the other worker + // will pick it up: + // + tokio::task::spawn_blocking(|| { + tokio::spawn(async move { + tx1.send(()).unwrap(); + rx2.recv().unwrap(); + }); + }); + + rx1.recv().unwrap(); + + // Spawn many tasks + for _ in 0..300 { + tokio::spawn(async {}); + } + + tx2.send(()).unwrap(); + }) + .await + .unwrap(); + }); + drop(rt); + + let n: u64 = (0..metrics.num_workers()) + .map(|i| metrics.worker_overflow_count(i)) + .sum(); + + assert_eq!(1, n); +} + +#[test] +fn injection_queue_depth_current_thread() { + use std::thread; + + let rt = current_thread(); + let handle = rt.handle().clone(); + let metrics = rt.metrics(); + + thread::spawn(move || { + handle.spawn(async {}); + }) + .join() + .unwrap(); + + assert_eq!(1, metrics.injection_queue_depth()); +} + +#[test] +fn injection_queue_depth_multi_thread() { + let rt = threaded(); + let metrics = rt.metrics(); + + let barrier1 = Arc::new(Barrier::new(3)); + let barrier2 = Arc::new(Barrier::new(3)); + + // Spawn a task per runtime worker to block it. + for _ in 0..2 { + let barrier1 = barrier1.clone(); + let barrier2 = barrier2.clone(); + rt.spawn(async move { + barrier1.wait(); + barrier2.wait(); + }); + } + + barrier1.wait(); + + for i in 0..10 { + assert_eq!(i, metrics.injection_queue_depth()); + rt.spawn(async {}); + } + + barrier2.wait(); +} + +#[test] +fn worker_local_queue_depth() { + const N: usize = 100; + + let rt = current_thread(); + let metrics = rt.metrics(); + rt.block_on(async { + for _ in 0..N { + tokio::spawn(async {}); + } + + assert_eq!(N, metrics.worker_local_queue_depth(0)); + }); + + let rt = threaded(); + let metrics = rt.metrics(); + rt.block_on(async move { + // Move to the runtime + tokio::spawn(async move { + let (tx1, rx1) = std::sync::mpsc::channel(); + let (tx2, rx2) = std::sync::mpsc::channel(); + + // First, we need to block the other worker until all tasks have + // been spawned. + tokio::spawn(async move { + tx1.send(()).unwrap(); + rx2.recv().unwrap(); + }); + + // Bump the next-run spawn + tokio::spawn(async {}); + + rx1.recv().unwrap(); + + // Spawn some tasks + for _ in 0..100 { + tokio::spawn(async {}); + } + + let n: usize = (0..metrics.num_workers()) + .map(|i| metrics.worker_local_queue_depth(i)) + .sum(); + + assert_eq!(n, N); + + tx2.send(()).unwrap(); + }) + .await + .unwrap(); + }); +} + +#[test] +fn budget_exhaustion_yield() { + let rt = current_thread(); + let metrics = rt.metrics(); + + assert_eq!(0, metrics.budget_forced_yield_count()); + + let mut did_yield = false; + + // block on a task which consumes budget until it yields + rt.block_on(poll_fn(|cx| loop { + if did_yield { + return Poll::Ready(()); + } + + let fut = consume_budget(); + tokio::pin!(fut); + + if fut.poll(cx).is_pending() { + did_yield = true; + return Poll::Pending; + } + })); + + assert_eq!(1, rt.metrics().budget_forced_yield_count()); +} + +#[test] +fn budget_exhaustion_yield_with_joins() { + let rt = current_thread(); + let metrics = rt.metrics(); + + assert_eq!(0, metrics.budget_forced_yield_count()); + + let mut did_yield_1 = false; + let mut did_yield_2 = false; + + // block on a task which consumes budget until it yields + rt.block_on(async { + tokio::join!( + poll_fn(|cx| loop { + if did_yield_1 { + return Poll::Ready(()); + } + + let fut = consume_budget(); + tokio::pin!(fut); + + if fut.poll(cx).is_pending() { + did_yield_1 = true; + return Poll::Pending; + } + }), + poll_fn(|cx| loop { + if did_yield_2 { + return Poll::Ready(()); + } + + let fut = consume_budget(); + tokio::pin!(fut); + + if fut.poll(cx).is_pending() { + did_yield_2 = true; + return Poll::Pending; + } + }) + ) + }); + + assert_eq!(1, rt.metrics().budget_forced_yield_count()); +} + +#[cfg(any(target_os = "linux", target_os = "macos"))] +#[test] +fn io_driver_fd_count() { + let rt = current_thread(); + let metrics = rt.metrics(); + + assert_eq!(metrics.io_driver_fd_registered_count(), 0); + + let stream = tokio::net::TcpStream::connect("google.com:80"); + let stream = rt.block_on(async move { stream.await.unwrap() }); + + assert_eq!(metrics.io_driver_fd_registered_count(), 1); + assert_eq!(metrics.io_driver_fd_deregistered_count(), 0); + + drop(stream); + + assert_eq!(metrics.io_driver_fd_deregistered_count(), 1); + assert_eq!(metrics.io_driver_fd_registered_count(), 1); +} + +#[cfg(any(target_os = "linux", target_os = "macos"))] +#[test] +fn io_driver_ready_count() { + let rt = current_thread(); + let metrics = rt.metrics(); + + let stream = tokio::net::TcpStream::connect("google.com:80"); + let _stream = rt.block_on(async move { stream.await.unwrap() }); + + assert_eq!(metrics.io_driver_ready_count(), 1); +} + +fn current_thread() -> Runtime { + tokio::runtime::Builder::new_current_thread() + .enable_all() + .build() + .unwrap() +} + +fn threaded() -> Runtime { + tokio::runtime::Builder::new_multi_thread() + .worker_threads(2) + .enable_all() + .build() + .unwrap() +} + +fn threaded_no_lifo() -> Runtime { + tokio::runtime::Builder::new_multi_thread() + .worker_threads(2) + .disable_lifo_slot() + .enable_all() + .build() + .unwrap() +} + +fn us(n: u64) -> Duration { + Duration::from_micros(n) +} From 3ad5b6df1a01c09da25a393d5857e99f71e5c179 Mon Sep 17 00:00:00 2001 From: Motoyuki Kimura Date: Mon, 22 Jul 2024 00:26:36 +0900 Subject: [PATCH 069/119] runtime: add cfg for loom specific code (#6694) --- tokio/src/runtime/blocking/pool.rs | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/tokio/src/runtime/blocking/pool.rs b/tokio/src/runtime/blocking/pool.rs index 20b23e00240..bc854f36d69 100644 --- a/tokio/src/runtime/blocking/pool.rs +++ b/tokio/src/runtime/blocking/pool.rs @@ -264,8 +264,12 @@ impl BlockingPool { // Loom requires that execution be deterministic, so sort by thread ID before joining. // (HashMaps use a randomly-seeded hash function, so the order is nondeterministic) - let mut workers: Vec<(usize, thread::JoinHandle<()>)> = workers.into_iter().collect(); - workers.sort_by_key(|(id, _)| *id); + #[cfg(loom)] + let workers: Vec<(usize, thread::JoinHandle<()>)> = { + let mut workers: Vec<_> = workers.into_iter().collect(); + workers.sort_by_key(|(id, _)| *id); + workers + }; for (_id, handle) in workers { let _ = handle.join(); From 56f4bc65435c0f5c237bda90aa662cf7e5099c47 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Sun, 21 Jul 2024 16:28:12 +0000 Subject: [PATCH 070/119] chore: make 1.38 an LTS (#6706) --- README.md | 1 + tokio/README.md | 1 + 2 files changed, 2 insertions(+) diff --git a/README.md b/README.md index 6a3d0e2be66..b04599b99bd 100644 --- a/README.md +++ b/README.md @@ -217,6 +217,7 @@ releases are: * `1.32.x` - LTS release until September 2024. (MSRV 1.63) * `1.36.x` - LTS release until March 2025. (MSRV 1.63) + * `1.38.x` - LTS release until July 2025. (MSRV 1.63) Each LTS release will continue to receive backported fixes for at least a year. If you wish to use a fixed minor release in your project, we recommend that you diff --git a/tokio/README.md b/tokio/README.md index 6a3d0e2be66..b04599b99bd 100644 --- a/tokio/README.md +++ b/tokio/README.md @@ -217,6 +217,7 @@ releases are: * `1.32.x` - LTS release until September 2024. (MSRV 1.63) * `1.36.x` - LTS release until March 2025. (MSRV 1.63) + * `1.38.x` - LTS release until July 2025. (MSRV 1.63) Each LTS release will continue to receive backported fixes for at least a year. If you wish to use a fixed minor release in your project, we recommend that you From 15cd5146d4ea998f6740c83818fc8c0020deb5dd Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Mon, 22 Jul 2024 18:01:27 +0000 Subject: [PATCH 071/119] chore: increase MSRV to 1.70 (#6645) --- .github/workflows/ci.yml | 2 +- README.md | 5 +++-- tokio-macros/Cargo.toml | 2 +- tokio-stream/Cargo.toml | 2 +- tokio-test/Cargo.toml | 2 +- tokio-util/Cargo.toml | 2 +- tokio/Cargo.toml | 2 +- tokio/README.md | 5 +++-- 8 files changed, 12 insertions(+), 10 deletions(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 76151902576..657b23d4e12 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -26,7 +26,7 @@ env: # - tokio-util/Cargo.toml # - tokio-test/Cargo.toml # - tokio-stream/Cargo.toml - rust_min: '1.63' + rust_min: '1.70' defaults: run: diff --git a/README.md b/README.md index b04599b99bd..43542f42db4 100644 --- a/README.md +++ b/README.md @@ -186,12 +186,13 @@ When updating this, also update: Tokio will keep a rolling MSRV (minimum supported rust version) policy of **at least** 6 months. When increasing the MSRV, the new Rust version must have been -released at least six months ago. The current MSRV is 1.63. +released at least six months ago. The current MSRV is 1.70. Note that the MSRV is not increased automatically, and only as part of a minor release. The MSRV history for past minor releases can be found below: - * 1.30 to now - Rust 1.63 + * 1.39 to now - Rust 1.70 + * 1.30 to 1.38 - Rust 1.63 * 1.27 to 1.29 - Rust 1.56 * 1.17 to 1.26 - Rust 1.49 * 1.15 to 1.16 - Rust 1.46 diff --git a/tokio-macros/Cargo.toml b/tokio-macros/Cargo.toml index c150334880c..597a762b9bd 100644 --- a/tokio-macros/Cargo.toml +++ b/tokio-macros/Cargo.toml @@ -6,7 +6,7 @@ name = "tokio-macros" # - Create "tokio-macros-1.x.y" git tag. version = "2.3.0" edition = "2021" -rust-version = "1.63" +rust-version = "1.70" authors = ["Tokio Contributors "] license = "MIT" repository = "https://github.com/tokio-rs/tokio" diff --git a/tokio-stream/Cargo.toml b/tokio-stream/Cargo.toml index d3ea3076930..87b2bf6db0a 100644 --- a/tokio-stream/Cargo.toml +++ b/tokio-stream/Cargo.toml @@ -6,7 +6,7 @@ name = "tokio-stream" # - Create "tokio-stream-0.1.x" git tag. version = "0.1.15" edition = "2021" -rust-version = "1.63" +rust-version = "1.70" authors = ["Tokio Contributors "] license = "MIT" repository = "https://github.com/tokio-rs/tokio" diff --git a/tokio-test/Cargo.toml b/tokio-test/Cargo.toml index 076f79bf5e8..536c5a848e8 100644 --- a/tokio-test/Cargo.toml +++ b/tokio-test/Cargo.toml @@ -6,7 +6,7 @@ name = "tokio-test" # - Create "tokio-test-0.4.x" git tag. version = "0.4.4" edition = "2021" -rust-version = "1.63" +rust-version = "1.70" authors = ["Tokio Contributors "] license = "MIT" repository = "https://github.com/tokio-rs/tokio" diff --git a/tokio-util/Cargo.toml b/tokio-util/Cargo.toml index a33e9c9cff7..23a577a37fe 100644 --- a/tokio-util/Cargo.toml +++ b/tokio-util/Cargo.toml @@ -6,7 +6,7 @@ name = "tokio-util" # - Create "tokio-util-0.7.x" git tag. version = "0.7.11" edition = "2021" -rust-version = "1.63" +rust-version = "1.70" authors = ["Tokio Contributors "] license = "MIT" repository = "https://github.com/tokio-rs/tokio" diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index 13a9a8c0579..283ae66bd92 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -8,7 +8,7 @@ name = "tokio" # - Create "v1.x.y" git tag. version = "1.38.1" edition = "2021" -rust-version = "1.63" +rust-version = "1.70" authors = ["Tokio Contributors "] license = "MIT" readme = "README.md" diff --git a/tokio/README.md b/tokio/README.md index b04599b99bd..43542f42db4 100644 --- a/tokio/README.md +++ b/tokio/README.md @@ -186,12 +186,13 @@ When updating this, also update: Tokio will keep a rolling MSRV (minimum supported rust version) policy of **at least** 6 months. When increasing the MSRV, the new Rust version must have been -released at least six months ago. The current MSRV is 1.63. +released at least six months ago. The current MSRV is 1.70. Note that the MSRV is not increased automatically, and only as part of a minor release. The MSRV history for past minor releases can be found below: - * 1.30 to now - Rust 1.63 + * 1.39 to now - Rust 1.70 + * 1.30 to 1.38 - Rust 1.63 * 1.27 to 1.29 - Rust 1.56 * 1.17 to 1.26 - Rust 1.49 * 1.15 to 1.16 - Rust 1.46 From feb742c58e440e606d929bf6ac10eb86d9c7b94d Mon Sep 17 00:00:00 2001 From: Tim Vilgot Mikael Fredenberg <26655508+vilgotf@users.noreply.github.com> Date: Mon, 22 Jul 2024 23:15:23 +0200 Subject: [PATCH 072/119] chore: replace `num_cpus` with `available_parallelism` (#6709) --- benches/Cargo.toml | 1 - tokio/Cargo.toml | 6 +----- tokio/src/loom/std/mod.rs | 6 +++++- 3 files changed, 6 insertions(+), 7 deletions(-) diff --git a/benches/Cargo.toml b/benches/Cargo.toml index c1d13bac279..048d6ee7725 100644 --- a/benches/Cargo.toml +++ b/benches/Cargo.toml @@ -12,7 +12,6 @@ tokio = { version = "1.5.0", path = "../tokio", features = ["full"] } criterion = "0.5.1" rand = "0.8" rand_chacha = "0.3" -num_cpus = "1.16.0" [dev-dependencies] tokio-util = { version = "0.7.0", path = "../tokio-util", features = ["full"] } diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index 283ae66bd92..4101d250df1 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -71,10 +71,7 @@ process = [ ] # Includes basic task execution capabilities rt = [] -rt-multi-thread = [ - "num_cpus", - "rt", -] +rt-multi-thread = ["rt"] signal = [ "libc", "mio/os-poll", @@ -96,7 +93,6 @@ pin-project-lite = "0.2.11" # Everything else is optional... bytes = { version = "1.0.0", optional = true } mio = { version = "0.8.9", optional = true, default-features = false } -num_cpus = { version = "1.8.0", optional = true } parking_lot = { version = "0.12.0", optional = true } [target.'cfg(not(target_family = "wasm"))'.dependencies] diff --git a/tokio/src/loom/std/mod.rs b/tokio/src/loom/std/mod.rs index 0c611af162a..985d8d73aeb 100644 --- a/tokio/src/loom/std/mod.rs +++ b/tokio/src/loom/std/mod.rs @@ -84,6 +84,8 @@ pub(crate) mod sync { pub(crate) mod sys { #[cfg(feature = "rt-multi-thread")] pub(crate) fn num_cpus() -> usize { + use std::num::NonZeroUsize; + const ENV_WORKER_THREADS: &str = "TOKIO_WORKER_THREADS"; match std::env::var(ENV_WORKER_THREADS) { @@ -97,7 +99,9 @@ pub(crate) mod sys { assert!(n > 0, "\"{}\" cannot be set to 0", ENV_WORKER_THREADS); n } - Err(std::env::VarError::NotPresent) => usize::max(1, num_cpus::get()), + Err(std::env::VarError::NotPresent) => { + std::thread::available_parallelism().map_or(1, NonZeroUsize::get) + } Err(std::env::VarError::NotUnicode(e)) => { panic!( "\"{}\" must be valid unicode, error: {:?}", From 6e845b794d53443c81b33e7dbe2e7bcf58863793 Mon Sep 17 00:00:00 2001 From: Alex Butler Date: Mon, 22 Jul 2024 22:29:18 +0100 Subject: [PATCH 073/119] time: support `IntoFuture` with `timeout` (#6666) --- tokio/src/time/timeout.rs | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/tokio/src/time/timeout.rs b/tokio/src/time/timeout.rs index 52ab9891c69..fa93a16910e 100644 --- a/tokio/src/time/timeout.rs +++ b/tokio/src/time/timeout.rs @@ -11,7 +11,7 @@ use crate::{ }; use pin_project_lite::pin_project; -use std::future::Future; +use std::future::{Future, IntoFuture}; use std::pin::Pin; use std::task::{self, Poll}; @@ -83,9 +83,9 @@ use std::task::{self, Poll}; /// [`Builder::enable_time`]: crate::runtime::Builder::enable_time /// [`Builder::enable_all`]: crate::runtime::Builder::enable_all #[track_caller] -pub fn timeout(duration: Duration, future: F) -> Timeout +pub fn timeout(duration: Duration, future: F) -> Timeout where - F: Future, + F: IntoFuture, { let location = trace::caller_location(); @@ -94,7 +94,7 @@ where Some(deadline) => Sleep::new_timeout(deadline, location), None => Sleep::far_future(location), }; - Timeout::new_with_delay(future, delay) + Timeout::new_with_delay(future.into_future(), delay) } /// Requires a `Future` to complete before the specified instant in time. @@ -142,14 +142,14 @@ where /// } /// # } /// ``` -pub fn timeout_at(deadline: Instant, future: F) -> Timeout +pub fn timeout_at(deadline: Instant, future: F) -> Timeout where - F: Future, + F: IntoFuture, { let delay = sleep_until(deadline); Timeout { - value: future, + value: future.into_future(), delay, } } From b69f16aa219818bc75e7ae6a22631d4e574efd39 Mon Sep 17 00:00:00 2001 From: Sebastian Urban Date: Tue, 23 Jul 2024 09:15:54 +0200 Subject: [PATCH 074/119] metrics: add `worker_park_unpark_count` (#6696) --- tokio/src/runtime/metrics/batch.rs | 13 +++++ tokio/src/runtime/metrics/mock.rs | 1 + tokio/src/runtime/metrics/runtime.rs | 55 +++++++++++++++++++ tokio/src/runtime/metrics/worker.rs | 3 + .../runtime/scheduler/current_thread/mod.rs | 3 + .../runtime/scheduler/multi_thread/stats.rs | 4 ++ .../runtime/scheduler/multi_thread/worker.rs | 5 ++ .../scheduler/multi_thread_alt/stats.rs | 4 ++ .../scheduler/multi_thread_alt/worker.rs | 3 + tokio/tests/rt_unstable_metrics.rs | 38 +++++++++++++ 10 files changed, 129 insertions(+) diff --git a/tokio/src/runtime/metrics/batch.rs b/tokio/src/runtime/metrics/batch.rs index 1d0f3dea30a..6118bcd04ca 100644 --- a/tokio/src/runtime/metrics/batch.rs +++ b/tokio/src/runtime/metrics/batch.rs @@ -7,6 +7,9 @@ pub(crate) struct MetricsBatch { /// Number of times the worker parked. park_count: u64, + /// Number of times the worker parked and unparked. + park_unpark_count: u64, + /// Number of times the worker woke w/o doing work. noop_count: u64, @@ -54,6 +57,7 @@ impl MetricsBatch { MetricsBatch { park_count: 0, + park_unpark_count: 0, noop_count: 0, steal_count: 0, steal_operations: 0, @@ -76,6 +80,9 @@ impl MetricsBatch { pub(crate) fn submit(&mut self, worker: &WorkerMetrics, mean_poll_time: u64) { worker.mean_poll_time.store(mean_poll_time, Relaxed); worker.park_count.store(self.park_count, Relaxed); + worker + .park_unpark_count + .store(self.park_unpark_count, Relaxed); worker.noop_count.store(self.noop_count, Relaxed); worker.steal_count.store(self.steal_count, Relaxed); worker @@ -101,6 +108,7 @@ impl MetricsBatch { /// The worker is about to park. pub(crate) fn about_to_park(&mut self) { self.park_count += 1; + self.park_unpark_count += 1; if self.poll_count_on_last_park == self.poll_count { self.noop_count += 1; @@ -109,6 +117,11 @@ impl MetricsBatch { } } + /// The worker was unparked. + pub(crate) fn unparked(&mut self) { + self.park_unpark_count += 1; + } + /// Start processing a batch of tasks pub(crate) fn start_processing_scheduled_tasks(&mut self) { self.processing_scheduled_tasks_started_at = Instant::now(); diff --git a/tokio/src/runtime/metrics/mock.rs b/tokio/src/runtime/metrics/mock.rs index e4bb3a99d0c..f4dc116539b 100644 --- a/tokio/src/runtime/metrics/mock.rs +++ b/tokio/src/runtime/metrics/mock.rs @@ -39,6 +39,7 @@ impl MetricsBatch { pub(crate) fn submit(&mut self, _to: &WorkerMetrics, _mean_poll_time: u64) {} pub(crate) fn about_to_park(&mut self) {} + pub(crate) fn unparked(&mut self) {} pub(crate) fn inc_local_schedule_count(&mut self) {} pub(crate) fn start_processing_scheduled_tasks(&mut self) {} pub(crate) fn end_processing_scheduled_tasks(&mut self) {} diff --git a/tokio/src/runtime/metrics/runtime.rs b/tokio/src/runtime/metrics/runtime.rs index fdbda6f3cb9..5bb79927a82 100644 --- a/tokio/src/runtime/metrics/runtime.rs +++ b/tokio/src/runtime/metrics/runtime.rs @@ -242,6 +242,61 @@ impl RuntimeMetrics { .load(Relaxed) } + /// Returns the total number of times the given worker thread has parked + /// and unparked. + /// + /// The worker park/unpark count starts at zero when the runtime is created + /// and increases by one each time the worker parks the thread waiting for + /// new inbound events to process. This usually means the worker has processed + /// all pending work and is currently idle. When new work becomes available, + /// the worker is unparked and the park/unpark count is again increased by one. + /// + /// An odd count means that the worker is currently parked. + /// An even count means that the worker is currently active. + /// + /// The counter is monotonically increasing. It is never decremented or + /// reset to zero. + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// let n = metrics.worker_park_unpark_count(0); + /// + /// println!("worker 0 parked and unparked {} times", n); + /// + /// if n % 2 == 0 { + /// println!("worker 0 is active"); + /// } else { + /// println!("worker 0 is parked"); + /// } + /// } + /// ``` + pub fn worker_park_unpark_count(&self, worker: usize) -> u64 { + self.handle + .inner + .worker_metrics(worker) + .park_unpark_count + .load(Relaxed) + } + + /// Returns the number of times the given worker thread unparked but /// performed no work before parking again. /// diff --git a/tokio/src/runtime/metrics/worker.rs b/tokio/src/runtime/metrics/worker.rs index e5d2c6f17fd..02dddc85247 100644 --- a/tokio/src/runtime/metrics/worker.rs +++ b/tokio/src/runtime/metrics/worker.rs @@ -16,6 +16,9 @@ pub(crate) struct WorkerMetrics { /// Number of times the worker parked. pub(crate) park_count: MetricAtomicU64, + /// Number of times the worker parked and unparked. + pub(crate) park_unpark_count: MetricAtomicU64, + /// Number of times the worker woke then parked again without doing work. pub(crate) noop_count: MetricAtomicU64, diff --git a/tokio/src/runtime/scheduler/current_thread/mod.rs b/tokio/src/runtime/scheduler/current_thread/mod.rs index 42a0a8822f4..4a3d849d264 100644 --- a/tokio/src/runtime/scheduler/current_thread/mod.rs +++ b/tokio/src/runtime/scheduler/current_thread/mod.rs @@ -368,6 +368,9 @@ impl Context { }); core = c; + + core.metrics.unparked(); + core.submit_metrics(handle); } if let Some(f) = &handle.shared.config.after_unpark { diff --git a/tokio/src/runtime/scheduler/multi_thread/stats.rs b/tokio/src/runtime/scheduler/multi_thread/stats.rs index 9d495706e8d..c59d4373ab8 100644 --- a/tokio/src/runtime/scheduler/multi_thread/stats.rs +++ b/tokio/src/runtime/scheduler/multi_thread/stats.rs @@ -74,6 +74,10 @@ impl Stats { self.batch.about_to_park(); } + pub(crate) fn unparked(&mut self) { + self.batch.unparked(); + } + pub(crate) fn inc_local_schedule_count(&mut self) { self.batch.inc_local_schedule_count(); } diff --git a/tokio/src/runtime/scheduler/multi_thread/worker.rs b/tokio/src/runtime/scheduler/multi_thread/worker.rs index 8ef487b09fd..d71e62df53a 100644 --- a/tokio/src/runtime/scheduler/multi_thread/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread/worker.rs @@ -699,8 +699,13 @@ impl Context { if core.transition_to_parked(&self.worker) { while !core.is_shutdown && !core.is_traced { core.stats.about_to_park(); + core.stats + .submit(&self.worker.handle.shared.worker_metrics[self.worker.index]); + core = self.park_timeout(core, None); + core.stats.unparked(); + // Run regularly scheduled maintenance core.maintenance(&self.worker); diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/stats.rs b/tokio/src/runtime/scheduler/multi_thread_alt/stats.rs index c2045602797..b7fdd82c9ef 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/stats.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/stats.rs @@ -100,6 +100,10 @@ impl Stats { self.batch.about_to_park(); } + pub(crate) fn unparked(&mut self) { + self.batch.unparked(); + } + pub(crate) fn inc_local_schedule_count(&mut self) { self.batch.inc_local_schedule_count(); } diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs index 9ceb7815a53..8f07b84297a 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs @@ -658,6 +658,9 @@ impl Worker { let n = cmp::max(core.run_queue.remaining_slots() / 2, 1); let maybe_task = self.next_remote_task_batch_synced(cx, &mut synced, &mut core, n); + core.stats.unparked(); + self.flush_metrics(cx, &mut core); + Ok((maybe_task, core)) } diff --git a/tokio/tests/rt_unstable_metrics.rs b/tokio/tests/rt_unstable_metrics.rs index 6640c524a69..2e51edee4d9 100644 --- a/tokio/tests/rt_unstable_metrics.rs +++ b/tokio/tests/rt_unstable_metrics.rs @@ -170,6 +170,44 @@ fn worker_park_count() { assert!(1 <= metrics.worker_park_count(1)); } +#[test] +fn worker_park_unpark_count() { + let rt = current_thread(); + let metrics = rt.metrics(); + rt.block_on(rt.spawn(async {})).unwrap(); + drop(rt); + assert!(2 <= metrics.worker_park_unpark_count(0)); + + let rt = threaded(); + let metrics = rt.metrics(); + + // Wait for workers to be parked after runtime startup. + for _ in 0..100 { + if 1 <= metrics.worker_park_unpark_count(0) && 1 <= metrics.worker_park_unpark_count(1) { + break; + } + std::thread::sleep(std::time::Duration::from_millis(100)); + } + assert_eq!(1, metrics.worker_park_unpark_count(0)); + assert_eq!(1, metrics.worker_park_unpark_count(1)); + + // Spawn a task to unpark and then park a worker. + rt.block_on(rt.spawn(async {})).unwrap(); + for _ in 0..100 { + if 3 <= metrics.worker_park_unpark_count(0) || 3 <= metrics.worker_park_unpark_count(1) { + break; + } + std::thread::sleep(std::time::Duration::from_millis(100)); + } + assert!(3 <= metrics.worker_park_unpark_count(0) || 3 <= metrics.worker_park_unpark_count(1)); + + // Both threads unpark for runtime shutdown. + drop(rt); + assert_eq!(0, metrics.worker_park_unpark_count(0) % 2); + assert_eq!(0, metrics.worker_park_unpark_count(1) % 2); + assert!(4 <= metrics.worker_park_unpark_count(0) || 4 <= metrics.worker_park_unpark_count(1)); +} + #[test] fn worker_noop_count() { // There isn't really a great way to generate no-op parks as they happen as From 90b23a9584db99ae81fffee38a89a09d2eca1834 Mon Sep 17 00:00:00 2001 From: Sebastian Urban Date: Tue, 23 Jul 2024 12:41:33 +0200 Subject: [PATCH 075/119] metrics: add worker thread id (#6695) --- tokio/src/runtime/metrics/mock.rs | 3 + tokio/src/runtime/metrics/runtime.rs | 44 +++++++++++++ tokio/src/runtime/metrics/worker.rs | 13 ++++ .../runtime/scheduler/current_thread/mod.rs | 7 ++- .../runtime/scheduler/multi_thread/worker.rs | 9 +++ .../scheduler/multi_thread_alt/worker.rs | 3 +- tokio/tests/rt_unstable_metrics.rs | 63 +++++++++++++++++++ 7 files changed, 140 insertions(+), 2 deletions(-) diff --git a/tokio/src/runtime/metrics/mock.rs b/tokio/src/runtime/metrics/mock.rs index f4dc116539b..777c13d8a83 100644 --- a/tokio/src/runtime/metrics/mock.rs +++ b/tokio/src/runtime/metrics/mock.rs @@ -1,5 +1,7 @@ //! This file contains mocks of the types in src/runtime/metrics +use std::thread::ThreadId; + pub(crate) struct SchedulerMetrics {} pub(crate) struct WorkerMetrics {} @@ -30,6 +32,7 @@ impl WorkerMetrics { } pub(crate) fn set_queue_depth(&self, _len: usize) {} + pub(crate) fn set_thread_id(&self, _thread_id: ThreadId) {} } impl MetricsBatch { diff --git a/tokio/src/runtime/metrics/runtime.rs b/tokio/src/runtime/metrics/runtime.rs index 5bb79927a82..f01a720200a 100644 --- a/tokio/src/runtime/metrics/runtime.rs +++ b/tokio/src/runtime/metrics/runtime.rs @@ -2,6 +2,7 @@ use crate::runtime::Handle; cfg_unstable_metrics! { use std::ops::Range; + use std::thread::ThreadId; cfg_64bit_metrics! { use std::sync::atomic::Ordering::Relaxed; } @@ -127,6 +128,49 @@ impl RuntimeMetrics { self.handle.inner.num_idle_blocking_threads() } + /// Returns the thread id of the given worker thread. + /// + /// The returned value is `None` if the worker thread has not yet finished + /// starting up. + /// + /// If additional information about the thread, such as its native id, are + /// required, those can be collected in [`on_thread_start`] and correlated + /// using the thread id. + /// + /// [`on_thread_start`]: crate::runtime::Builder::on_thread_start + /// + /// # Arguments + /// + /// `worker` is the index of the worker being queried. The given value must + /// be between 0 and `num_workers()`. The index uniquely identifies a single + /// worker and will continue to identify the worker throughout the lifetime + /// of the runtime instance. + /// + /// # Panics + /// + /// The method panics when `worker` represents an invalid worker, i.e. is + /// greater than or equal to `num_workers()`. + /// + /// # Examples + /// + /// ``` + /// use tokio::runtime::Handle; + /// + /// #[tokio::main] + /// async fn main() { + /// let metrics = Handle::current().metrics(); + /// + /// let id = metrics.worker_thread_id(0); + /// println!("worker 0 has id {:?}", id); + /// } + /// ``` + pub fn worker_thread_id(&self, worker: usize) -> Option { + self.handle + .inner + .worker_metrics(worker) + .thread_id() + } + cfg_64bit_metrics! { /// Returns the number of tasks spawned in this runtime since it was created. /// diff --git a/tokio/src/runtime/metrics/worker.rs b/tokio/src/runtime/metrics/worker.rs index 02dddc85247..29804a08798 100644 --- a/tokio/src/runtime/metrics/worker.rs +++ b/tokio/src/runtime/metrics/worker.rs @@ -2,6 +2,8 @@ use crate::runtime::metrics::Histogram; use crate::runtime::Config; use crate::util::metric_atomics::{MetricAtomicU64, MetricAtomicUsize}; use std::sync::atomic::Ordering::Relaxed; +use std::sync::Mutex; +use std::thread::ThreadId; /// Retrieve runtime worker metrics. /// @@ -49,6 +51,9 @@ pub(crate) struct WorkerMetrics { /// If `Some`, tracks the number of polls by duration range. pub(super) poll_count_histogram: Option, + + /// Thread id of worker thread. + thread_id: Mutex>, } impl WorkerMetrics { @@ -72,4 +77,12 @@ impl WorkerMetrics { pub(crate) fn set_queue_depth(&self, len: usize) { self.queue_depth.store(len, Relaxed); } + + pub(crate) fn thread_id(&self) -> Option { + *self.thread_id.lock().unwrap() + } + + pub(crate) fn set_thread_id(&self, thread_id: ThreadId) { + *self.thread_id.lock().unwrap() = Some(thread_id); + } } diff --git a/tokio/src/runtime/scheduler/current_thread/mod.rs b/tokio/src/runtime/scheduler/current_thread/mod.rs index 4a3d849d264..5c952061e72 100644 --- a/tokio/src/runtime/scheduler/current_thread/mod.rs +++ b/tokio/src/runtime/scheduler/current_thread/mod.rs @@ -11,12 +11,12 @@ use crate::util::{waker_ref, RngSeedGenerator, Wake, WakerRef}; use std::cell::RefCell; use std::collections::VecDeque; -use std::fmt; use std::future::Future; use std::sync::atomic::Ordering::{AcqRel, Release}; use std::task::Poll::{Pending, Ready}; use std::task::Waker; use std::time::Duration; +use std::{fmt, thread}; /// Executes tasks on the current thread pub(crate) struct CurrentThread { @@ -123,6 +123,7 @@ impl CurrentThread { config: Config, ) -> (CurrentThread, Arc) { let worker_metrics = WorkerMetrics::from_config(&config); + worker_metrics.set_thread_id(thread::current().id()); // Get the configured global queue interval, or use the default. let global_queue_interval = config @@ -172,6 +173,10 @@ impl CurrentThread { // available or the future is complete. loop { if let Some(core) = self.take_core(handle) { + handle + .shared + .worker_metrics + .set_thread_id(thread::current().id()); return core.block_on(future); } else { let notified = self.notify.notified(); diff --git a/tokio/src/runtime/scheduler/multi_thread/worker.rs b/tokio/src/runtime/scheduler/multi_thread/worker.rs index d71e62df53a..9b521efc9b1 100644 --- a/tokio/src/runtime/scheduler/multi_thread/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread/worker.rs @@ -72,6 +72,7 @@ use crate::util::rand::{FastRand, RngSeedGenerator}; use std::cell::RefCell; use std::task::Waker; +use std::thread; use std::time::Duration; cfg_unstable_metrics! { @@ -334,6 +335,12 @@ where if let Some(cx) = maybe_cx { if self.take_core { let core = cx.worker.core.take(); + + if core.is_some() { + cx.worker.handle.shared.worker_metrics[cx.worker.index] + .set_thread_id(thread::current().id()); + } + let mut cx_core = cx.core.borrow_mut(); assert!(cx_core.is_none()); *cx_core = core; @@ -482,6 +489,8 @@ fn run(worker: Arc) { None => return, }; + worker.handle.shared.worker_metrics[worker.index].set_thread_id(thread::current().id()); + let handle = scheduler::Handle::MultiThread(worker.handle.clone()); crate::runtime::context::enter_runtime(&handle, true, |_| { diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs index 8f07b84297a..9f6af9d4d7a 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs @@ -70,9 +70,9 @@ use crate::util::atomic_cell::AtomicCell; use crate::util::rand::{FastRand, RngSeedGenerator}; use std::cell::{Cell, RefCell}; -use std::cmp; use std::task::Waker; use std::time::Duration; +use std::{cmp, thread}; cfg_unstable_metrics! { mod metrics; @@ -569,6 +569,7 @@ impl Worker { } }; + cx.shared().worker_metrics[core.index].set_thread_id(thread::current().id()); core.stats.start_processing_scheduled_tasks(&mut self.stats); if let Some(task) = maybe_task { diff --git a/tokio/tests/rt_unstable_metrics.rs b/tokio/tests/rt_unstable_metrics.rs index 2e51edee4d9..a6438fb1b3d 100644 --- a/tokio/tests/rt_unstable_metrics.rs +++ b/tokio/tests/rt_unstable_metrics.rs @@ -10,6 +10,7 @@ use std::future::Future; use std::sync::{Arc, Barrier, Mutex}; use std::task::Poll; +use std::thread; use tokio::macros::support::poll_fn; use tokio::runtime::Runtime; @@ -150,6 +151,68 @@ fn remote_schedule_count() { assert_eq!(1, rt.metrics().remote_schedule_count()); } +#[test] +fn worker_thread_id_current_thread() { + let rt = current_thread(); + let metrics = rt.metrics(); + + // Check that runtime is on this thread. + rt.block_on(async {}); + assert_eq!(Some(thread::current().id()), metrics.worker_thread_id(0)); + + // Move runtime to another thread. + let thread_id = std::thread::scope(|scope| { + let join_handle = scope.spawn(|| { + rt.block_on(async {}); + }); + join_handle.thread().id() + }); + assert_eq!(Some(thread_id), metrics.worker_thread_id(0)); + + // Move runtime back to this thread. + rt.block_on(async {}); + assert_eq!(Some(thread::current().id()), metrics.worker_thread_id(0)); +} + +#[test] +fn worker_thread_id_threaded() { + let rt = threaded(); + let metrics = rt.metrics(); + + rt.block_on(rt.spawn(async move { + // Check that we are running on a worker thread and determine + // the index of our worker. + let thread_id = std::thread::current().id(); + let this_worker = (0..2) + .position(|w| metrics.worker_thread_id(w) == Some(thread_id)) + .expect("task not running on any worker thread"); + + // Force worker to another thread. + let moved_thread_id = tokio::task::block_in_place(|| { + assert_eq!(thread_id, std::thread::current().id()); + + // Wait for worker to move to another thread. + for _ in 0..100 { + let new_id = metrics.worker_thread_id(this_worker).unwrap(); + if thread_id != new_id { + return new_id; + } + std::thread::sleep(Duration::from_millis(100)); + } + + panic!("worker did not move to new thread"); + }); + + // After blocking task worker either stays on new thread or + // is moved back to current thread. + assert!( + metrics.worker_thread_id(this_worker) == Some(moved_thread_id) + || metrics.worker_thread_id(this_worker) == Some(thread_id) + ); + })) + .unwrap() +} + #[test] fn worker_park_count() { let rt = current_thread(); From 754a1fb03c7456682a652f66eba6d76cfa1c6ad8 Mon Sep 17 00:00:00 2001 From: Thomas de Zeeuw Date: Tue, 23 Jul 2024 14:26:07 +0200 Subject: [PATCH 076/119] deps: update to Mio v1 (#6635) --- tokio/Cargo.toml | 2 +- tokio/src/net/unix/socketaddr.rs | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index 4101d250df1..de566d02efc 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -92,7 +92,7 @@ pin-project-lite = "0.2.11" # Everything else is optional... bytes = { version = "1.0.0", optional = true } -mio = { version = "0.8.9", optional = true, default-features = false } +mio = { version = "1.0.1", optional = true, default-features = false } parking_lot = { version = "0.12.0", optional = true } [target.'cfg(not(target_family = "wasm"))'.dependencies] diff --git a/tokio/src/net/unix/socketaddr.rs b/tokio/src/net/unix/socketaddr.rs index 48f7b96b8c2..62ed4294d45 100644 --- a/tokio/src/net/unix/socketaddr.rs +++ b/tokio/src/net/unix/socketaddr.rs @@ -2,7 +2,7 @@ use std::fmt; use std::path::Path; /// An address associated with a Tokio Unix socket. -pub struct SocketAddr(pub(super) mio::net::SocketAddr); +pub struct SocketAddr(pub(super) std::os::unix::net::SocketAddr); impl SocketAddr { /// Returns `true` if the address is unnamed. From 51b03f0334a79298c942c123eb99ebf8daac0352 Mon Sep 17 00:00:00 2001 From: Kenny Kerr Date: Tue, 23 Jul 2024 07:43:23 -0500 Subject: [PATCH 077/119] deps: update to windows-sys v0.52 (#6154) --- examples/Cargo.toml | 2 +- tokio/Cargo.toml | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/examples/Cargo.toml b/examples/Cargo.toml index a244fccaca1..d1a70dbc774 100644 --- a/examples/Cargo.toml +++ b/examples/Cargo.toml @@ -25,7 +25,7 @@ once_cell = "1.5.2" rand = "0.8.3" [target.'cfg(windows)'.dev-dependencies.windows-sys] -version = "0.48" +version = "0.52" [[example]] name = "chat" diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index de566d02efc..bdacd760a6b 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -117,11 +117,11 @@ libc = { version = "0.2.149" } nix = { version = "0.29.0", default-features = false, features = ["aio", "fs", "socket"] } [target.'cfg(windows)'.dependencies.windows-sys] -version = "0.48" +version = "0.52" optional = true [target.'cfg(windows)'.dev-dependencies.windows-sys] -version = "0.48" +version = "0.52" features = [ "Win32_Foundation", "Win32_Security_Authorization", From 6a1a7b15912d1a86ab4c0d09e1a8f0a221dbfeee Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Tue, 23 Jul 2024 12:45:06 +0000 Subject: [PATCH 078/119] chore: prepare tokio-macros v2.4.0 (#6707) --- tokio-macros/CHANGELOG.md | 8 ++++++++ tokio-macros/Cargo.toml | 2 +- tokio/Cargo.toml | 2 +- 3 files changed, 10 insertions(+), 2 deletions(-) diff --git a/tokio-macros/CHANGELOG.md b/tokio-macros/CHANGELOG.md index 9d305bf3b74..9b30d342e11 100644 --- a/tokio-macros/CHANGELOG.md +++ b/tokio-macros/CHANGELOG.md @@ -1,3 +1,11 @@ +# 2.4.0 (July 22nd, 2024) + +- msrv: increase MSRV to 1.70 ([#6645]) +- macros: allow `unhandled_panic` behavior for `#[tokio::main]` and `#[tokio::test]` ([#6593]) + +[#6593]: https://github.com/tokio-rs/tokio/pull/6593 +[#6645]: https://github.com/tokio-rs/tokio/pull/6645 + # 2.3.0 (May 30th, 2024) - macros: make `#[tokio::test]` append `#[test]` at the end of the attribute list ([#6497]) diff --git a/tokio-macros/Cargo.toml b/tokio-macros/Cargo.toml index 597a762b9bd..26ff7001b73 100644 --- a/tokio-macros/Cargo.toml +++ b/tokio-macros/Cargo.toml @@ -4,7 +4,7 @@ name = "tokio-macros" # - Remove path dependencies # - Update CHANGELOG.md. # - Create "tokio-macros-1.x.y" git tag. -version = "2.3.0" +version = "2.4.0" edition = "2021" rust-version = "1.70" authors = ["Tokio Contributors "] diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index bdacd760a6b..ba2532f4050 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -86,7 +86,7 @@ test-util = ["rt", "sync", "time"] time = [] [dependencies] -tokio-macros = { version = "~2.3.0", path = "../tokio-macros", optional = true } +tokio-macros = { version = "~2.4.0", path = "../tokio-macros", optional = true } pin-project-lite = "0.2.11" From dd1d37167d1f4008ca5d3df500e86826112a8cad Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Tue, 23 Jul 2024 12:52:25 +0000 Subject: [PATCH 079/119] macros: accept `IntoFuture` args for macros (#6710) --- tokio/src/future/maybe_done.rs | 8 +++++--- tokio/src/macros/select.rs | 2 +- tokio/src/macros/support.rs | 2 +- tokio/tests/macros_join.rs | 15 +++++++++++++++ tokio/tests/macros_select.rs | 17 +++++++++++++++++ 5 files changed, 39 insertions(+), 5 deletions(-) diff --git a/tokio/src/future/maybe_done.rs b/tokio/src/future/maybe_done.rs index 506b4f26c18..8b270b3a01f 100644 --- a/tokio/src/future/maybe_done.rs +++ b/tokio/src/future/maybe_done.rs @@ -1,7 +1,7 @@ //! Definition of the [`MaybeDone`] combinator. use pin_project_lite::pin_project; -use std::future::Future; +use std::future::{Future, IntoFuture}; use std::pin::Pin; use std::task::{Context, Poll}; @@ -22,8 +22,10 @@ pin_project! { } /// Wraps a future into a `MaybeDone`. -pub fn maybe_done(future: Fut) -> MaybeDone { - MaybeDone::Future { future } +pub fn maybe_done(future: F) -> MaybeDone { + MaybeDone::Future { + future: future.into_future(), + } } impl MaybeDone { diff --git a/tokio/src/macros/select.rs b/tokio/src/macros/select.rs index 124d7827086..505c70dd060 100644 --- a/tokio/src/macros/select.rs +++ b/tokio/src/macros/select.rs @@ -495,7 +495,7 @@ doc! {macro_rules! select { // We can't use the `pin!` macro for this because `futures` is a // tuple and the standard library provides no way to pin-project to // the fields of a tuple. - let mut futures = ( $( $fut , )+ ); + let mut futures = ( $( $crate::macros::support::IntoFuture::into_future($fut) , )+ ); // This assignment makes sure that the `poll_fn` closure only has a // reference to the futures, instead of taking ownership of them. diff --git a/tokio/src/macros/support.rs b/tokio/src/macros/support.rs index 10526bcbca7..d077a0823c7 100644 --- a/tokio/src/macros/support.rs +++ b/tokio/src/macros/support.rs @@ -8,6 +8,6 @@ cfg_macros! { } } -pub use std::future::Future; +pub use std::future::{Future, IntoFuture}; pub use std::pin::Pin; pub use std::task::Poll; diff --git a/tokio/tests/macros_join.rs b/tokio/tests/macros_join.rs index 37dd05f0e13..4deaf120a95 100644 --- a/tokio/tests/macros_join.rs +++ b/tokio/tests/macros_join.rs @@ -159,3 +159,18 @@ async fn a_different_future_is_polled_first_every_time_poll_fn_is_polled() { async fn empty_join() { assert_eq!(tokio::join!(), ()); } + +#[tokio::test] +async fn join_into_future() { + struct NotAFuture; + impl std::future::IntoFuture for NotAFuture { + type Output = (); + type IntoFuture = std::future::Ready<()>; + + fn into_future(self) -> Self::IntoFuture { + std::future::ready(()) + } + } + + tokio::join!(NotAFuture); +} diff --git a/tokio/tests/macros_select.rs b/tokio/tests/macros_select.rs index cbad971ab1f..c91d696426c 100644 --- a/tokio/tests/macros_select.rs +++ b/tokio/tests/macros_select.rs @@ -692,3 +692,20 @@ mod unstable { ) } } + +#[tokio::test] +async fn select_into_future() { + struct NotAFuture; + impl std::future::IntoFuture for NotAFuture { + type Output = (); + type IntoFuture = std::future::Ready<()>; + + fn into_future(self) -> Self::IntoFuture { + std::future::ready(()) + } + } + + tokio::select! { + () = NotAFuture => {}, + } +} From 48e35c11d924ffa3a009b89fbb6d36e57b835da4 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Tue, 23 Jul 2024 13:30:11 +0000 Subject: [PATCH 080/119] chore: release Tokio v1.39.0 (#6711) --- README.md | 2 +- tokio/CHANGELOG.md | 78 ++++++++++++++++++++++++++++++++++++++++++++++ tokio/Cargo.toml | 2 +- tokio/README.md | 2 +- 4 files changed, 81 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index 43542f42db4..5ce0617718e 100644 --- a/README.md +++ b/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.38.1", features = ["full"] } +tokio = { version = "1.39.0", features = ["full"] } ``` Then, on your main.rs: diff --git a/tokio/CHANGELOG.md b/tokio/CHANGELOG.md index cfe70fa4d52..32ef173c8ca 100644 --- a/tokio/CHANGELOG.md +++ b/tokio/CHANGELOG.md @@ -1,3 +1,81 @@ +# 1.39.0 (July 23rd, 2024) + +- This release bumps the MSRV to 1.70. ([#6645]) +- This release upgrades to mio v1. ([#6635]) +- This release upgrades to windows-sys v0.52 ([#6154]) + +### Added + +- io: implement `AsyncSeek` for `Empty` ([#6663]) +- metrics: stabilize `num_alive_tasks` ([#6619], [#6667]) +- process: add `Command::as_std_mut` ([#6608]) +- sync: add `watch::Sender::same_channel` ([#6637]) +- sync: add `{Receiver,UnboundedReceiver}::{sender_strong_count,sender_weak_count}` ([#6661]) +- sync: implement `Default` for `watch::Sender` ([#6626]) +- task: implement `Clone` for `AbortHandle` ([#6621]) +- task: stabilize `consume_budget` ([#6622]) + +### Changed + +- io: improve panic message of `ReadBuf::put_slice()` ([#6629]) +- io: read during write in `copy_bidirectional` and `copy` ([#6532]) +- runtime: replace `num_cpus` with `available_parallelism` ([#6709]) +- task: avoid stack overflow when passing large future to `block_on` ([#6692]) +- time: avoid traversing entries in the time wheel twice ([#6584]) +- time: support `IntoFuture` with `timeout` ([#6666]) +- macros: support `IntoFuture` with `join!` and `select!` ([#6710]) + +### Fixed + +- docs: fix docsrs builds with the fs feature enabled ([#6585]) +- io: only use short-read optimization on known-to-be-compatible platforms ([#6668]) +- time: fix overflow panic when using large durations with `Interval` ([#6612]) + +### Added (unstable) + +- macros: allow `unhandled_panic` behavior for `#[tokio::main]` and `#[tokio::test]` ([#6593]) +- metrics: add `spawned_tasks_count` ([#6114]) +- metrics: add `worker_park_unpark_count` ([#6696]) +- metrics: add worker thread id ([#6695]) + +### Documented + +- io: update `tokio::io::stdout` documentation ([#6674]) +- macros: typo fix in `join.rs` and `try_join.rs` ([#6641]) +- runtime: fix typo in `unhandled_panic` ([#6660]) +- task: document behavior of `JoinSet::try_join_next` when all tasks are running ([#6671]) + +[#6114]: https://github.com/tokio-rs/tokio/pull/6114 +[#6154]: https://github.com/tokio-rs/tokio/pull/6154 +[#6532]: https://github.com/tokio-rs/tokio/pull/6532 +[#6584]: https://github.com/tokio-rs/tokio/pull/6584 +[#6585]: https://github.com/tokio-rs/tokio/pull/6585 +[#6593]: https://github.com/tokio-rs/tokio/pull/6593 +[#6608]: https://github.com/tokio-rs/tokio/pull/6608 +[#6612]: https://github.com/tokio-rs/tokio/pull/6612 +[#6619]: https://github.com/tokio-rs/tokio/pull/6619 +[#6621]: https://github.com/tokio-rs/tokio/pull/6621 +[#6622]: https://github.com/tokio-rs/tokio/pull/6622 +[#6626]: https://github.com/tokio-rs/tokio/pull/6626 +[#6629]: https://github.com/tokio-rs/tokio/pull/6629 +[#6635]: https://github.com/tokio-rs/tokio/pull/6635 +[#6637]: https://github.com/tokio-rs/tokio/pull/6637 +[#6641]: https://github.com/tokio-rs/tokio/pull/6641 +[#6645]: https://github.com/tokio-rs/tokio/pull/6645 +[#6660]: https://github.com/tokio-rs/tokio/pull/6660 +[#6661]: https://github.com/tokio-rs/tokio/pull/6661 +[#6663]: https://github.com/tokio-rs/tokio/pull/6663 +[#6666]: https://github.com/tokio-rs/tokio/pull/6666 +[#6667]: https://github.com/tokio-rs/tokio/pull/6667 +[#6668]: https://github.com/tokio-rs/tokio/pull/6668 +[#6671]: https://github.com/tokio-rs/tokio/pull/6671 +[#6674]: https://github.com/tokio-rs/tokio/pull/6674 +[#6692]: https://github.com/tokio-rs/tokio/pull/6692 +[#6695]: https://github.com/tokio-rs/tokio/pull/6695 +[#6696]: https://github.com/tokio-rs/tokio/pull/6696 +[#6709]: https://github.com/tokio-rs/tokio/pull/6709 +[#6710]: https://github.com/tokio-rs/tokio/pull/6710 + # 1.38.1 (July 16th, 2024) This release fixes the bug identified as ([#6682]), which caused timers not diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index ba2532f4050..a2fcddf34ce 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -6,7 +6,7 @@ name = "tokio" # - README.md # - Update CHANGELOG.md. # - Create "v1.x.y" git tag. -version = "1.38.1" +version = "1.39.0" edition = "2021" rust-version = "1.70" authors = ["Tokio Contributors "] diff --git a/tokio/README.md b/tokio/README.md index 43542f42db4..5ce0617718e 100644 --- a/tokio/README.md +++ b/tokio/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.38.1", features = ["full"] } +tokio = { version = "1.39.0", features = ["full"] } ``` Then, on your main.rs: From 29545d90370d925a7264ff8636013ee6bf1760e6 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Tue, 23 Jul 2024 14:35:20 +0000 Subject: [PATCH 081/119] runtime: ignore many_oneshot_futures test for alt scheduler (#6712) --- tokio/tests/rt_threaded_alt.rs | 1 + 1 file changed, 1 insertion(+) diff --git a/tokio/tests/rt_threaded_alt.rs b/tokio/tests/rt_threaded_alt.rs index 33af45e68bb..7d723605a27 100644 --- a/tokio/tests/rt_threaded_alt.rs +++ b/tokio/tests/rt_threaded_alt.rs @@ -37,6 +37,7 @@ fn single_thread() { } #[test] +#[ignore] // https://github.com/tokio-rs/tokio/issues/5995 fn many_oneshot_futures() { // used for notifying the main thread const NUM: usize = 1_000; From 47210a8e6eeb82b51aa778074fdc4d757b953b8c Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Tue, 23 Jul 2024 18:09:28 +0200 Subject: [PATCH 082/119] time: revert "avoid traversing entries in the time wheel twice" (#6715) This reverts commit 8480a180e6ffdd0ec0ec213a9bebcda2445fc541. --- tokio/src/runtime/time/entry.rs | 99 ++++++++++--- tokio/src/runtime/time/mod.rs | 60 ++------ tokio/src/runtime/time/wheel/level.rs | 22 ++- tokio/src/runtime/time/wheel/mod.rs | 193 ++++++++++++-------------- tokio/src/util/linked_list.rs | 1 - 5 files changed, 190 insertions(+), 185 deletions(-) diff --git a/tokio/src/runtime/time/entry.rs b/tokio/src/runtime/time/entry.rs index 0bd15a74f8b..834077caa3d 100644 --- a/tokio/src/runtime/time/entry.rs +++ b/tokio/src/runtime/time/entry.rs @@ -21,8 +21,9 @@ //! //! Each timer has a state field associated with it. This field contains either //! the current scheduled time, or a special flag value indicating its state. -//! This state can either indicate that the timer is firing (and thus will be fired -//! with an `Ok(())` result soon) or that it has already been fired/deregistered. +//! This state can either indicate that the timer is on the 'pending' queue (and +//! thus will be fired with an `Ok(())` result soon) or that it has already been +//! fired/deregistered. //! //! This single state field allows for code that is firing the timer to //! synchronize with any racing `reset` calls reliably. @@ -48,10 +49,10 @@ //! There is of course a race condition between timer reset and timer //! expiration. If the driver fails to observe the updated expiration time, it //! could trigger expiration of the timer too early. However, because -//! [`mark_firing`][mark_firing] performs a compare-and-swap, it will identify this race and -//! refuse to mark the timer as firing. +//! [`mark_pending`][mark_pending] performs a compare-and-swap, it will identify this race and +//! refuse to mark the timer as pending. //! -//! [mark_firing]: TimerHandle::mark_firing +//! [mark_pending]: TimerHandle::mark_pending use crate::loom::cell::UnsafeCell; use crate::loom::sync::atomic::AtomicU64; @@ -69,9 +70,9 @@ use std::{marker::PhantomPinned, pin::Pin, ptr::NonNull}; type TimerResult = Result<(), crate::time::error::Error>; -pub(super) const STATE_DEREGISTERED: u64 = u64::MAX; -const STATE_FIRING: u64 = STATE_DEREGISTERED - 1; -const STATE_MIN_VALUE: u64 = STATE_FIRING; +const STATE_DEREGISTERED: u64 = u64::MAX; +const STATE_PENDING_FIRE: u64 = STATE_DEREGISTERED - 1; +const STATE_MIN_VALUE: u64 = STATE_PENDING_FIRE; /// The largest safe integer to use for ticks. /// /// This value should be updated if any other signal values are added above. @@ -122,6 +123,10 @@ impl StateCell { } } + fn is_pending(&self) -> bool { + self.state.load(Ordering::Relaxed) == STATE_PENDING_FIRE + } + /// Returns the current expiration time, or None if not currently scheduled. fn when(&self) -> Option { let cur_state = self.state.load(Ordering::Relaxed); @@ -157,28 +162,26 @@ impl StateCell { } } - /// Marks this timer firing, if its scheduled time is not after `not_after`. + /// Marks this timer as being moved to the pending list, if its scheduled + /// time is not after `not_after`. /// /// If the timer is scheduled for a time after `not_after`, returns an Err /// containing the current scheduled time. /// /// SAFETY: Must hold the driver lock. - unsafe fn mark_firing(&self, not_after: u64) -> Result<(), u64> { + unsafe fn mark_pending(&self, not_after: u64) -> Result<(), u64> { // Quick initial debug check to see if the timer is already fired. Since // firing the timer can only happen with the driver lock held, we know // we shouldn't be able to "miss" a transition to a fired state, even // with relaxed ordering. let mut cur_state = self.state.load(Ordering::Relaxed); + loop { - // Because its state is STATE_DEREGISTERED, it has been fired. - if cur_state == STATE_DEREGISTERED { - break Err(cur_state); - } // improve the error message for things like // https://github.com/tokio-rs/tokio/issues/3675 assert!( cur_state < STATE_MIN_VALUE, - "mark_firing called when the timer entry is in an invalid state" + "mark_pending called when the timer entry is in an invalid state" ); if cur_state > not_after { @@ -187,7 +190,7 @@ impl StateCell { match self.state.compare_exchange_weak( cur_state, - STATE_FIRING, + STATE_PENDING_FIRE, Ordering::AcqRel, Ordering::Acquire, ) { @@ -334,6 +337,11 @@ pub(crate) struct TimerShared { /// Only accessed under the entry lock. pointers: linked_list::Pointers, + /// The expiration time for which this entry is currently registered. + /// Generally owned by the driver, but is accessed by the entry when not + /// registered. + cached_when: AtomicU64, + /// Current state. This records whether the timer entry is currently under /// the ownership of the driver, and if not, its current state (not /// complete, fired, error, etc). @@ -348,6 +356,7 @@ unsafe impl Sync for TimerShared {} impl std::fmt::Debug for TimerShared { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { f.debug_struct("TimerShared") + .field("cached_when", &self.cached_when.load(Ordering::Relaxed)) .field("state", &self.state) .finish() } @@ -365,12 +374,40 @@ impl TimerShared { pub(super) fn new(shard_id: u32) -> Self { Self { shard_id, + cached_when: AtomicU64::new(0), pointers: linked_list::Pointers::new(), state: StateCell::default(), _p: PhantomPinned, } } + /// Gets the cached time-of-expiration value. + pub(super) fn cached_when(&self) -> u64 { + // Cached-when is only accessed under the driver lock, so we can use relaxed + self.cached_when.load(Ordering::Relaxed) + } + + /// Gets the true time-of-expiration value, and copies it into the cached + /// time-of-expiration value. + /// + /// SAFETY: Must be called with the driver lock held, and when this entry is + /// not in any timer wheel lists. + pub(super) unsafe fn sync_when(&self) -> u64 { + let true_when = self.true_when(); + + self.cached_when.store(true_when, Ordering::Relaxed); + + true_when + } + + /// Sets the cached time-of-expiration value. + /// + /// SAFETY: Must be called with the driver lock held, and when this entry is + /// not in any timer wheel lists. + unsafe fn set_cached_when(&self, when: u64) { + self.cached_when.store(when, Ordering::Relaxed); + } + /// Returns the true time-of-expiration value, with relaxed memory ordering. pub(super) fn true_when(&self) -> u64 { self.state.when().expect("Timer already fired") @@ -383,6 +420,7 @@ impl TimerShared { /// in the timer wheel. pub(super) unsafe fn set_expiration(&self, t: u64) { self.state.set_expiration(t); + self.cached_when.store(t, Ordering::Relaxed); } /// Sets the true time-of-expiration only if it is after the current. @@ -552,8 +590,16 @@ impl TimerEntry { } impl TimerHandle { - pub(super) unsafe fn true_when(&self) -> u64 { - unsafe { self.inner.as_ref().true_when() } + pub(super) unsafe fn cached_when(&self) -> u64 { + unsafe { self.inner.as_ref().cached_when() } + } + + pub(super) unsafe fn sync_when(&self) -> u64 { + unsafe { self.inner.as_ref().sync_when() } + } + + pub(super) unsafe fn is_pending(&self) -> bool { + unsafe { self.inner.as_ref().state.is_pending() } } /// Forcibly sets the true and cached expiration times to the given tick. @@ -564,7 +610,7 @@ impl TimerHandle { self.inner.as_ref().set_expiration(tick); } - /// Attempts to mark this entry as firing. If the expiration time is after + /// Attempts to mark this entry as pending. If the expiration time is after /// `not_after`, however, returns an Err with the current expiration time. /// /// If an `Err` is returned, the `cached_when` value will be updated to this @@ -572,8 +618,19 @@ impl TimerHandle { /// /// SAFETY: The caller must ensure that the handle remains valid, the driver /// lock is held, and that the timer is not in any wheel linked lists. - pub(super) unsafe fn mark_firing(&self, not_after: u64) -> Result<(), u64> { - self.inner.as_ref().state.mark_firing(not_after) + /// After returning Ok, the entry must be added to the pending list. + pub(super) unsafe fn mark_pending(&self, not_after: u64) -> Result<(), u64> { + match self.inner.as_ref().state.mark_pending(not_after) { + Ok(()) => { + // mark this as being on the pending queue in cached_when + self.inner.as_ref().set_cached_when(u64::MAX); + Ok(()) + } + Err(tick) => { + self.inner.as_ref().set_cached_when(tick); + Err(tick) + } + } } /// Attempts to transition to a terminal state. If the state is already a diff --git a/tokio/src/runtime/time/mod.rs b/tokio/src/runtime/time/mod.rs index 0e4c995dcd0..c01a5f2b25e 100644 --- a/tokio/src/runtime/time/mod.rs +++ b/tokio/src/runtime/time/mod.rs @@ -8,7 +8,7 @@ mod entry; pub(crate) use entry::TimerEntry; -use entry::{EntryList, TimerHandle, TimerShared, MAX_SAFE_MILLIS_DURATION, STATE_DEREGISTERED}; +use entry::{EntryList, TimerHandle, TimerShared, MAX_SAFE_MILLIS_DURATION}; mod handle; pub(crate) use self::handle::Handle; @@ -324,53 +324,23 @@ impl Handle { now = lock.elapsed(); } - while let Some(expiration) = lock.poll(now) { - lock.set_elapsed(expiration.deadline); - // It is critical for `GuardedLinkedList` safety that the guard node is - // pinned in memory and is not dropped until the guarded list is dropped. - let guard = TimerShared::new(id); - pin!(guard); - let guard_handle = guard.as_ref().get_ref().handle(); - - // * This list will be still guarded by the lock of the Wheel with the specefied id. - // `EntryWaitersList` wrapper makes sure we hold the lock to modify it. - // * This wrapper will empty the list on drop. It is critical for safety - // that we will not leave any list entry with a pointer to the local - // guard node after this function returns / panics. - // Safety: The `TimerShared` inside this `TimerHandle` is pinned in the memory. - let mut list = unsafe { lock.get_waiters_list(&expiration, guard_handle, id, self) }; - - while let Some(entry) = list.pop_back_locked(&mut lock) { - let deadline = expiration.deadline; - // Try to expire the entry; this is cheap (doesn't synchronize) if - // the timer is not expired, and updates cached_when. - match unsafe { entry.mark_firing(deadline) } { - Ok(()) => { - // Entry was expired. - // SAFETY: We hold the driver lock, and just removed the entry from any linked lists. - if let Some(waker) = unsafe { entry.fire(Ok(())) } { - waker_list.push(waker); - - if !waker_list.can_push() { - // Wake a batch of wakers. To avoid deadlock, - // we must do this with the lock temporarily dropped. - drop(lock); - waker_list.wake_all(); - - lock = self.inner.lock_sharded_wheel(id); - } - } - } - Err(state) if state == STATE_DEREGISTERED => {} - Err(state) => { - // Safety: This Entry has not expired. - unsafe { lock.reinsert_entry(entry, deadline, state) }; - } + while let Some(entry) = lock.poll(now) { + debug_assert!(unsafe { entry.is_pending() }); + + // SAFETY: We hold the driver lock, and just removed the entry from any linked lists. + if let Some(waker) = unsafe { entry.fire(Ok(())) } { + waker_list.push(waker); + + if !waker_list.can_push() { + // Wake a batch of wakers. To avoid deadlock, we must do this with the lock temporarily dropped. + drop(lock); + + waker_list.wake_all(); + + lock = self.inner.lock_sharded_wheel(id); } } - lock.occupied_bit_maintain(&expiration); } - let next_wake_up = lock.poll_at(); drop(lock); diff --git a/tokio/src/runtime/time/wheel/level.rs b/tokio/src/runtime/time/wheel/level.rs index 6539f47b4fa..d31eaf46879 100644 --- a/tokio/src/runtime/time/wheel/level.rs +++ b/tokio/src/runtime/time/wheel/level.rs @@ -20,6 +20,7 @@ pub(crate) struct Level { } /// Indicates when a slot must be processed next. +#[derive(Debug)] pub(crate) struct Expiration { /// The level containing the slot. pub(crate) level: usize, @@ -80,7 +81,7 @@ impl Level { // pseudo-ring buffer, and we rotate around them indefinitely. If we // compute a deadline before now, and it's the top level, it // therefore means we're actually looking at a slot in the future. - debug_assert_eq!(self.level, super::MAX_LEVEL_INDEX); + debug_assert_eq!(self.level, super::NUM_LEVELS - 1); deadline += level_range; } @@ -119,7 +120,7 @@ impl Level { } pub(crate) unsafe fn add_entry(&mut self, item: TimerHandle) { - let slot = slot_for(item.true_when(), self.level); + let slot = slot_for(item.cached_when(), self.level); self.slot[slot].push_front(item); @@ -127,25 +128,22 @@ impl Level { } pub(crate) unsafe fn remove_entry(&mut self, item: NonNull) { - let slot = slot_for(unsafe { item.as_ref().true_when() }, self.level); + let slot = slot_for(unsafe { item.as_ref().cached_when() }, self.level); unsafe { self.slot[slot].remove(item) }; if self.slot[slot].is_empty() { + // The bit is currently set + debug_assert!(self.occupied & occupied_bit(slot) != 0); + // Unset the bit self.occupied ^= occupied_bit(slot); } } - pub(super) fn take_slot(&mut self, slot: usize) -> EntryList { - std::mem::take(&mut self.slot[slot]) - } + pub(crate) fn take_slot(&mut self, slot: usize) -> EntryList { + self.occupied &= !occupied_bit(slot); - pub(super) fn occupied_bit_maintain(&mut self, slot: usize) { - if self.slot[slot].is_empty() { - self.occupied &= !occupied_bit(slot); - } else { - self.occupied |= occupied_bit(slot); - } + std::mem::take(&mut self.slot[slot]) } } diff --git a/tokio/src/runtime/time/wheel/mod.rs b/tokio/src/runtime/time/wheel/mod.rs index a4034053134..f2b4228514c 100644 --- a/tokio/src/runtime/time/wheel/mod.rs +++ b/tokio/src/runtime/time/wheel/mod.rs @@ -1,6 +1,5 @@ use crate::runtime::time::{TimerHandle, TimerShared}; use crate::time::error::InsertError; -use crate::util::linked_list::{self, GuardedLinkedList, LinkedList}; mod level; pub(crate) use self::level::Expiration; @@ -8,59 +7,7 @@ use self::level::Level; use std::{array, ptr::NonNull}; -use super::entry::MAX_SAFE_MILLIS_DURATION; -use super::Handle; - -/// List used in `Handle::process_at_sharded_time`. It wraps a guarded linked list -/// and gates the access to it on the lock of the `Wheel` with the specified `wheel_id`. -/// It also empties the list on drop. -pub(super) struct EntryWaitersList<'a> { - // GuardedLinkedList ensures that the concurrent drop of Entry in this slot is safe. - list: GuardedLinkedList::Target>, - is_empty: bool, - wheel_id: u32, - handle: &'a Handle, -} - -impl<'a> Drop for EntryWaitersList<'a> { - fn drop(&mut self) { - // If the list is not empty, we unlink all waiters from it. - // We do not wake the waiters to avoid double panics. - if !self.is_empty { - let _lock = self.handle.inner.lock_sharded_wheel(self.wheel_id); - while self.list.pop_back().is_some() {} - } - } -} - -impl<'a> EntryWaitersList<'a> { - fn new( - unguarded_list: LinkedList::Target>, - guard_handle: TimerHandle, - wheel_id: u32, - handle: &'a Handle, - ) -> Self { - let list = unguarded_list.into_guarded(guard_handle); - Self { - list, - is_empty: false, - wheel_id, - handle, - } - } - - /// Removes the last element from the guarded list. Modifying this list - /// requires an exclusive access to the Wheel with the specified `wheel_id`. - pub(super) fn pop_back_locked(&mut self, _wheel: &mut Wheel) -> Option { - let result = self.list.pop_back(); - if result.is_none() { - // Save information about emptiness to avoid waiting for lock - // in the destructor. - self.is_empty = true; - } - result - } -} +use super::EntryList; /// Timing wheel implementation. /// @@ -89,6 +36,9 @@ pub(crate) struct Wheel { /// * ~ 4 hr slots / ~ 12 day range /// * ~ 12 day slots / ~ 2 yr range levels: Box<[Level; NUM_LEVELS]>, + + /// Entries queued for firing + pending: EntryList, } /// Number of levels. Each level has 64 slots. By using 6 levels with 64 slots @@ -96,9 +46,6 @@ pub(crate) struct Wheel { /// precision of 1 millisecond. const NUM_LEVELS: usize = 6; -/// The max level index. -pub(super) const MAX_LEVEL_INDEX: usize = NUM_LEVELS - 1; - /// The maximum duration of a `Sleep`. pub(super) const MAX_DURATION: u64 = (1 << (6 * NUM_LEVELS)) - 1; @@ -108,6 +55,7 @@ impl Wheel { Wheel { elapsed: 0, levels: Box::new(array::from_fn(Level::new)), + pending: EntryList::new(), } } @@ -142,7 +90,7 @@ impl Wheel { &mut self, item: TimerHandle, ) -> Result { - let when = item.true_when(); + let when = item.sync_when(); if when <= self.elapsed { return Err((item, InsertError::Elapsed)); @@ -151,7 +99,9 @@ impl Wheel { // Get the level at which the entry should be stored let level = self.level_for(when); - unsafe { self.levels[level].add_entry(item) }; + unsafe { + self.levels[level].add_entry(item); + } debug_assert!({ self.levels[level] @@ -166,8 +116,10 @@ impl Wheel { /// Removes `item` from the timing wheel. pub(crate) unsafe fn remove(&mut self, item: NonNull) { unsafe { - let when = item.as_ref().true_when(); - if when <= MAX_SAFE_MILLIS_DURATION { + let when = item.as_ref().cached_when(); + if when == u64::MAX { + self.pending.remove(item); + } else { debug_assert!( self.elapsed <= when, "elapsed={}; when={}", @@ -176,42 +128,54 @@ impl Wheel { ); let level = self.level_for(when); - // If the entry is not contained in the `slot` list, - // then it is contained by a guarded list. self.levels[level].remove_entry(item); } } } - /// Reinserts `item` to the timing wheel. - /// Safety: This entry must not have expired. - pub(super) unsafe fn reinsert_entry(&mut self, entry: TimerHandle, elapsed: u64, when: u64) { - let level = level_for(elapsed, when); - unsafe { self.levels[level].add_entry(entry) }; - } - /// Instant at which to poll. pub(crate) fn poll_at(&self) -> Option { self.next_expiration().map(|expiration| expiration.deadline) } /// Advances the timer up to the instant represented by `now`. - pub(crate) fn poll(&mut self, now: u64) -> Option { - match self.next_expiration() { - Some(expiration) if expiration.deadline <= now => Some(expiration), - _ => { - // in this case the poll did not indicate an expiration - // _and_ we were not able to find a next expiration in - // the current list of timers. advance to the poll's - // current time and do nothing else. - self.set_elapsed(now); - None + pub(crate) fn poll(&mut self, now: u64) -> Option { + loop { + if let Some(handle) = self.pending.pop_back() { + return Some(handle); + } + + match self.next_expiration() { + Some(ref expiration) if expiration.deadline <= now => { + self.process_expiration(expiration); + + self.set_elapsed(expiration.deadline); + } + _ => { + // in this case the poll did not indicate an expiration + // _and_ we were not able to find a next expiration in + // the current list of timers. advance to the poll's + // current time and do nothing else. + self.set_elapsed(now); + break; + } } } + + self.pending.pop_back() } /// Returns the instant at which the next timeout expires. fn next_expiration(&self) -> Option { + if !self.pending.is_empty() { + // Expire immediately as we have things pending firing + return Some(Expiration { + level: 0, + slot: 0, + deadline: self.elapsed, + }); + } + // Check all levels for (level_num, level) in self.levels.iter().enumerate() { if let Some(expiration) = level.next_expiration(self.elapsed) { @@ -247,28 +211,11 @@ impl Wheel { res } - pub(super) fn set_elapsed(&mut self, when: u64) { - assert!( - self.elapsed <= when, - "elapsed={:?}; when={:?}", - self.elapsed, - when - ); - - if when > self.elapsed { - self.elapsed = when; - } - } - - /// Obtains the guarded list of entries that need processing for the given expiration. - /// Safety: The `TimerShared` inside `guard_handle` must be pinned in the memory. - pub(super) unsafe fn get_waiters_list<'a>( - &mut self, - expiration: &Expiration, - guard_handle: TimerHandle, - wheel_id: u32, - handle: &'a Handle, - ) -> EntryWaitersList<'a> { + /// iteratively find entries that are between the wheel's current + /// time and the expiration time. for each in that population either + /// queue it for notification (in the case of the last level) or tier + /// it down to the next level (in all other cases). + pub(crate) fn process_expiration(&mut self, expiration: &Expiration) { // Note that we need to take _all_ of the entries off the list before // processing any of them. This is important because it's possible that // those entries might need to be reinserted into the same slot. @@ -279,12 +226,46 @@ impl Wheel { // they actually need to be dropped down a level. We then reinsert them // back into the same position; we must make sure we don't then process // those entries again or we'll end up in an infinite loop. - let unguarded_list = self.levels[expiration.level].take_slot(expiration.slot); - EntryWaitersList::new(unguarded_list, guard_handle, wheel_id, handle) + let mut entries = self.take_entries(expiration); + + while let Some(item) = entries.pop_back() { + if expiration.level == 0 { + debug_assert_eq!(unsafe { item.cached_when() }, expiration.deadline); + } + + // Try to expire the entry; this is cheap (doesn't synchronize) if + // the timer is not expired, and updates cached_when. + match unsafe { item.mark_pending(expiration.deadline) } { + Ok(()) => { + // Item was expired + self.pending.push_front(item); + } + Err(expiration_tick) => { + let level = level_for(expiration.deadline, expiration_tick); + unsafe { + self.levels[level].add_entry(item); + } + } + } + } + } + + fn set_elapsed(&mut self, when: u64) { + assert!( + self.elapsed <= when, + "elapsed={:?}; when={:?}", + self.elapsed, + when + ); + + if when > self.elapsed { + self.elapsed = when; + } } - pub(super) fn occupied_bit_maintain(&mut self, expiration: &Expiration) { - self.levels[expiration.level].occupied_bit_maintain(expiration.slot); + /// Obtains the list of entries that need processing for the given expiration. + fn take_entries(&mut self, expiration: &Expiration) -> EntryList { + self.levels[expiration.level].take_slot(expiration.slot) } fn level_for(&self, when: u64) -> usize { diff --git a/tokio/src/util/linked_list.rs b/tokio/src/util/linked_list.rs index 382d9ee1978..3650f87fbb0 100644 --- a/tokio/src/util/linked_list.rs +++ b/tokio/src/util/linked_list.rs @@ -334,7 +334,6 @@ feature! { feature = "sync", feature = "rt", feature = "signal", - feature = "time", )] /// An intrusive linked list, but instead of keeping pointers to the head From f8fe0ffb23c2279708cb5dada7c88defdae60845 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Tue, 23 Jul 2024 18:28:04 +0200 Subject: [PATCH 083/119] chore: prepare Tokio v1.39.1 (#6716) --- README.md | 2 +- tokio/CHANGELOG.md | 9 +++++++++ tokio/Cargo.toml | 2 +- tokio/README.md | 2 +- 4 files changed, 12 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index 5ce0617718e..db29b923144 100644 --- a/README.md +++ b/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.39.0", features = ["full"] } +tokio = { version = "1.39.1", features = ["full"] } ``` Then, on your main.rs: diff --git a/tokio/CHANGELOG.md b/tokio/CHANGELOG.md index 32ef173c8ca..d43f43e843f 100644 --- a/tokio/CHANGELOG.md +++ b/tokio/CHANGELOG.md @@ -1,5 +1,14 @@ +# 1.39.1 (July 23rd, 2024) + +This release reverts "time: avoid traversing entries in the time wheel twice" +because it contains a bug. ([#6715]) + +[#6715]: https://github.com/tokio-rs/tokio/pull/6715 + # 1.39.0 (July 23rd, 2024) +Yanked. Please use 1.39.1 instead. + - This release bumps the MSRV to 1.70. ([#6645]) - This release upgrades to mio v1. ([#6635]) - This release upgrades to windows-sys v0.52 ([#6154]) diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index a2fcddf34ce..c28b52a1604 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -6,7 +6,7 @@ name = "tokio" # - README.md # - Update CHANGELOG.md. # - Create "v1.x.y" git tag. -version = "1.39.0" +version = "1.39.1" edition = "2021" rust-version = "1.70" authors = ["Tokio Contributors "] diff --git a/tokio/README.md b/tokio/README.md index 5ce0617718e..db29b923144 100644 --- a/tokio/README.md +++ b/tokio/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.39.0", features = ["full"] } +tokio = { version = "1.39.1", features = ["full"] } ``` Then, on your main.rs: From 32970527633bb72fc4f01d02523484a9376ac26a Mon Sep 17 00:00:00 2001 From: Dirkjan Ochtman Date: Thu, 25 Jul 2024 11:37:46 +0200 Subject: [PATCH 084/119] ci: test Quinn in CI (#6719) --- .github/workflows/ci.yml | 51 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 657b23d4e12..b6295d9c4cb 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -65,6 +65,7 @@ jobs: - loom-compile - check-readme - test-hyper + - test-quinn - x86_64-fortanix-unknown-sgx - check-redox - wasm32-unknown-unknown @@ -859,6 +860,56 @@ jobs: run: cargo test --features full working-directory: hyper + test-quinn: + name: Test Quinn + needs: basics + runs-on: ${{ matrix.os }} + strategy: + matrix: + os: + - windows-latest + - ubuntu-latest + - macos-latest + steps: + - uses: actions/checkout@v4 + - name: Install Rust ${{ env.rust_stable }} + uses: dtolnay/rust-toolchain@stable + with: + toolchain: ${{ env.rust_stable }} + + - name: Clone Quinn + run: git clone https://github.com/quinn-rs/quinn.git + + - name: Checkout the latest release because HEAD maybe contains breakage. + run: | + set -x + tag=$(git describe --abbrev=0 --tags) + git checkout "${tag}" + working-directory: quinn + + - name: Patch Quinn to use tokio from this repository + run: | + set -x + echo '[patch.crates-io]' >>Cargo.toml + echo 'tokio = { path = "../tokio" }' >>Cargo.toml + git diff + working-directory: quinn + + - uses: Swatinem/rust-cache@v2 + with: + # The cargo workspaces and target directory configuration. + # These entries are separated by newlines and have the form + # `$workspace -> $target`. The `$target` part is treated as a directory + # relative to the `$workspace` and defaults to "target" if not explicitly given. + # default: ". -> target" + workspaces: "./quinn" + + - name: Test Quinn + working-directory: quinn + env: + RUSTFLAGS: "" + run: cargo test + x86_64-fortanix-unknown-sgx: name: build tokio for x86_64-fortanix-unknown-sgx needs: basics From ee8d4d1b0546c67198af3cd053d6b7b8b4fd26c3 Mon Sep 17 00:00:00 2001 From: Motoyuki Kimura Date: Fri, 26 Jul 2024 03:30:23 +0900 Subject: [PATCH 085/119] chore: fix ci failures (#6725) --- examples/dump.rs | 2 ++ tokio-macros/src/lib.rs | 4 ++++ tokio/src/runtime/tests/queue.rs | 1 + 3 files changed, 7 insertions(+) diff --git a/examples/dump.rs b/examples/dump.rs index c7ece458ff8..6f744713f7c 100644 --- a/examples/dump.rs +++ b/examples/dump.rs @@ -1,3 +1,5 @@ +#![allow(unknown_lints, unexpected_cfgs)] + //! This example demonstrates tokio's experimental task dumping functionality. //! This application deadlocks. Input CTRL+C to display traces of each task, or //! input CTRL+C twice within 1 second to quit. diff --git a/tokio-macros/src/lib.rs b/tokio-macros/src/lib.rs index b5d31c7f6dc..29ea2867cff 100644 --- a/tokio-macros/src/lib.rs +++ b/tokio-macros/src/lib.rs @@ -211,6 +211,7 @@ use proc_macro::TokenStream; /// This option is only compatible with the `current_thread` runtime. /// /// ```no_run +/// # #![allow(unknown_lints, unexpected_cfgs)] /// #[cfg(tokio_unstable)] /// #[tokio::main(flavor = "current_thread", unhandled_panic = "shutdown_runtime")] /// async fn main() { @@ -225,6 +226,7 @@ use proc_macro::TokenStream; /// Equivalent code not using `#[tokio::main]` /// /// ```no_run +/// # #![allow(unknown_lints, unexpected_cfgs)] /// #[cfg(tokio_unstable)] /// fn main() { /// tokio::runtime::Builder::new_current_thread() @@ -478,6 +480,7 @@ pub fn main_rt(args: TokenStream, item: TokenStream) -> TokenStream { /// This option is only compatible with the `current_thread` runtime. /// /// ```no_run +/// # #![allow(unknown_lints, unexpected_cfgs)] /// #[cfg(tokio_unstable)] /// #[tokio::test(flavor = "current_thread", unhandled_panic = "shutdown_runtime")] /// async fn my_test() { @@ -492,6 +495,7 @@ pub fn main_rt(args: TokenStream, item: TokenStream) -> TokenStream { /// Equivalent code not using `#[tokio::test]` /// /// ```no_run +/// # #![allow(unknown_lints, unexpected_cfgs)] /// #[cfg(tokio_unstable)] /// #[test] /// fn my_test() { diff --git a/tokio/src/runtime/tests/queue.rs b/tokio/src/runtime/tests/queue.rs index f463355f0d3..c4d4a1b8642 100644 --- a/tokio/src/runtime/tests/queue.rs +++ b/tokio/src/runtime/tests/queue.rs @@ -273,6 +273,7 @@ fn stress2() { } } +#[allow(dead_code)] struct Runtime; impl Schedule for Runtime { From 438def79579a7e285beb5f0d93b1eb6a9f8062b3 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Fri, 26 Jul 2024 17:36:28 +0100 Subject: [PATCH 086/119] macros: allow temporary lifetime extension in select (#6722) --- tokio/src/macros/select.rs | 211 ++++++++++++++++++++++++++++++++++- tokio/tests/macros_select.rs | 8 ++ 2 files changed, 218 insertions(+), 1 deletion(-) diff --git a/tokio/src/macros/select.rs b/tokio/src/macros/select.rs index 505c70dd060..5e3b661415b 100644 --- a/tokio/src/macros/select.rs +++ b/tokio/src/macros/select.rs @@ -489,13 +489,22 @@ doc! {macro_rules! select { // Create a scope to separate polling from handling the output. This // adds borrow checker flexibility when using the macro. let mut output = { + // Store each future directly first (that is, without wrapping the future in a call to + // `IntoFuture::into_future`). This allows the `$fut` expression to make use of + // temporary lifetime extension. + // + // https://doc.rust-lang.org/1.58.1/reference/destructors.html#temporary-lifetime-extension + let futures_init = ($( $fut, )+); + // Safety: Nothing must be moved out of `futures`. This is to // satisfy the requirement of `Pin::new_unchecked` called below. // // We can't use the `pin!` macro for this because `futures` is a // tuple and the standard library provides no way to pin-project to // the fields of a tuple. - let mut futures = ( $( $crate::macros::support::IntoFuture::into_future($fut) , )+ ); + let mut futures = ($( $crate::macros::support::IntoFuture::into_future( + $crate::count_field!( futures_init.$($skip)* ) + ),)+); // This assignment makes sure that the `poll_fn` closure only has a // reference to the futures, instead of taking ownership of them. @@ -854,6 +863,206 @@ macro_rules! count { }; } +#[macro_export] +#[doc(hidden)] +macro_rules! count_field { + ($var:ident. ) => { + $var.0 + }; + ($var:ident. _) => { + $var.1 + }; + ($var:ident. _ _) => { + $var.2 + }; + ($var:ident. _ _ _) => { + $var.3 + }; + ($var:ident. _ _ _ _) => { + $var.4 + }; + ($var:ident. _ _ _ _ _) => { + $var.5 + }; + ($var:ident. _ _ _ _ _ _) => { + $var.6 + }; + ($var:ident. _ _ _ _ _ _ _) => { + $var.7 + }; + ($var:ident. _ _ _ _ _ _ _ _) => { + $var.8 + }; + ($var:ident. _ _ _ _ _ _ _ _ _) => { + $var.9 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _) => { + $var.10 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _) => { + $var.11 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.12 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.13 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.14 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.15 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.16 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.17 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.18 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.19 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.20 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.21 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.22 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.23 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.24 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.25 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.26 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.27 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.28 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.29 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.30 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.31 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.32 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.33 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.34 + }; 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+ ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.44 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.45 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.46 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.47 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.48 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.49 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.50 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.51 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.52 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.53 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.54 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.55 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.56 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.57 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.58 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.59 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.60 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.61 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.62 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.63 + }; + ($var:ident. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _) => { + $var.64 + }; +} + #[macro_export] #[doc(hidden)] macro_rules! select_variant { diff --git a/tokio/tests/macros_select.rs b/tokio/tests/macros_select.rs index c91d696426c..6c05a3fda0d 100644 --- a/tokio/tests/macros_select.rs +++ b/tokio/tests/macros_select.rs @@ -709,3 +709,11 @@ async fn select_into_future() { () = NotAFuture => {}, } } + +// regression test for https://github.com/tokio-rs/tokio/issues/6721 +#[tokio::test] +async fn temporary_lifetime_extension() { + tokio::select! { + () = &mut std::future::ready(()) => {}, + } +} From f602eae49988dbad2a11fd83e6b3fbd4f094713c Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Sat, 27 Jul 2024 11:36:48 +0100 Subject: [PATCH 087/119] chore: prepare Tokio v1.39.2 (#6730) --- README.md | 2 +- tokio/CHANGELOG.md | 7 +++++++ tokio/Cargo.toml | 2 +- tokio/README.md | 2 +- 4 files changed, 10 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index db29b923144..091d1d90cec 100644 --- a/README.md +++ b/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.39.1", features = ["full"] } +tokio = { version = "1.39.2", features = ["full"] } ``` Then, on your main.rs: diff --git a/tokio/CHANGELOG.md b/tokio/CHANGELOG.md index d43f43e843f..f593cb3335c 100644 --- a/tokio/CHANGELOG.md +++ b/tokio/CHANGELOG.md @@ -1,3 +1,10 @@ +# 1.39.2 (July 27th, 2024) + +This release fixes a regression where the `select!` macro stopped accepting +expressions that make use of temporary lifetime extension. ([#6722]) + +[#6722]: https://github.com/tokio-rs/tokio/pull/6722 + # 1.39.1 (July 23rd, 2024) This release reverts "time: avoid traversing entries in the time wheel twice" diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index c28b52a1604..12a8c698570 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -6,7 +6,7 @@ name = "tokio" # - README.md # - Update CHANGELOG.md. # - Create "v1.x.y" git tag. -version = "1.39.1" +version = "1.39.2" edition = "2021" rust-version = "1.70" authors = ["Tokio Contributors "] diff --git a/tokio/README.md b/tokio/README.md index db29b923144..091d1d90cec 100644 --- a/tokio/README.md +++ b/tokio/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.39.1", features = ["full"] } +tokio = { version = "1.39.2", features = ["full"] } ``` Then, on your main.rs: From ebda4c3d3fed055323de6b56223a475e4d4ce500 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 27 Jul 2024 23:08:40 +0200 Subject: [PATCH 088/119] process: stabilize `Command::process_group` (#6731) --- tokio/src/process/mod.rs | 31 ++++++++++++++++++------------- 1 file changed, 18 insertions(+), 13 deletions(-) diff --git a/tokio/src/process/mod.rs b/tokio/src/process/mod.rs index fc768809f02..cf1952ac189 100644 --- a/tokio/src/process/mod.rs +++ b/tokio/src/process/mod.rs @@ -751,29 +751,34 @@ impl Command { /// /// Process groups determine which processes receive signals. /// - /// **Note**: This is an [unstable API][unstable] but will be stabilised once - /// tokio's `MSRV` is sufficiently new. See [the documentation on - /// unstable features][unstable] for details about using unstable features. + /// # Examples + /// + /// Pressing Ctrl-C in a terminal will send `SIGINT` to all processes + /// in the current foreground process group. By spawning the `sleep` + /// subprocess in a new process group, it will not receive `SIGINT` + /// from the terminal. /// - /// If you want similar behavior without using this unstable feature you can - /// create a [`std::process::Command`] and convert that into a - /// [`tokio::process::Command`] using the `From` trait. + /// The parent process could install a [signal handler] and manage the + /// process on its own terms. /// - /// [unstable]: crate#unstable-features - /// [`tokio::process::Command`]: crate::process::Command + /// A process group ID of 0 will use the process ID as the PGID. /// /// ```no_run /// # async fn test() { // allow using await /// use tokio::process::Command; /// - /// let output = Command::new("ls") - /// .process_group(0) - /// .output().await.unwrap(); + /// let output = Command::new("sleep") + /// .arg("10") + /// .process_group(0) + /// .output() + /// .await + /// .unwrap(); /// # } /// ``` + /// + /// [signal handler]: crate::signal #[cfg(unix)] - #[cfg(tokio_unstable)] - #[cfg_attr(docsrs, doc(cfg(all(unix, tokio_unstable))))] + #[cfg_attr(docsrs, doc(cfg(unix)))] pub fn process_group(&mut self, pgroup: i32) -> &mut Command { self.std.process_group(pgroup); self From 04c271850874a63e9bfc4fef75192c8c1a5164ac Mon Sep 17 00:00:00 2001 From: Hayden Stainsby Date: Mon, 29 Jul 2024 11:23:29 +0200 Subject: [PATCH 089/119] docs: reiterate that `[build]` doesn't go in Cargo.toml (#6728) To enable unstable features in Tokio, passing `--cfg tokio_unstable` to the compiler is necessary. We document how to do this in a variety of ways in the main Tokio (lib.rs) documentation. One way is to add a `[build]` section to the file `.cargo/config.toml`. Even though this filename is stated in the documentation, it is quite common that first time users (including this author, some time ago) put it in their `Cargo.toml` file instead. This change adds a "warning" section to the documentation to reiterate the point that this section doesn't go in the cargo manifest (`Cargo.toml`). --- tokio/src/lib.rs | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tokio/src/lib.rs b/tokio/src/lib.rs index 70ff89fbfe7..bd85e28510f 100644 --- a/tokio/src/lib.rs +++ b/tokio/src/lib.rs @@ -367,6 +367,12 @@ //! rustflags = ["--cfg", "tokio_unstable"] //! ``` //! +//!
+//! The [build] section does not go in a +//! Cargo.toml file. Instead it must be placed in the Cargo config +//! file .cargo/config.toml. +//!
+//! //! Alternatively, you can specify it with an environment variable: //! //! ```sh From 0cbf1a5adae81e8ff86ca6d040aeee67cf888262 Mon Sep 17 00:00:00 2001 From: Hayden Stainsby Date: Mon, 29 Jul 2024 12:06:13 +0200 Subject: [PATCH 090/119] time,sync: make Sleep and BatchSemaphore instrumentation explicit roots (#6727) When instrumenting resources in Tokio, a span is created for each resource. Previously, all resources inherited the currently active span as their parent (tracing default). However, this would keep that parent span alive until the resource (and its span) were dropped. This is often not correct, as a resource may be created in a task and then sent elsewhere, while the originating task ends. This artificial extension of the parent span's lifetime would make it look like that task was still alive (but idle) in any system reading the tracing instrumentation in Tokio, for example Tokio Console as reported in tokio-rs/console#345. In #6107, most of the existing resource spans were updated to make them explicit roots, so they have no contextual parent. However, 2. were missed: - `Sleep` - `BatchSemaphore` This change alters the resource spans for those 2 resources to also make them explicit roots. --- tokio/src/sync/batch_semaphore.rs | 1 + tokio/src/time/sleep.rs | 1 + .../tracing-instrumentation/tests/sync.rs | 2 +- .../tracing-instrumentation/tests/time.rs | 61 +++++++++++++++++++ 4 files changed, 64 insertions(+), 1 deletion(-) create mode 100644 tokio/tests/tracing-instrumentation/tests/time.rs diff --git a/tokio/src/sync/batch_semaphore.rs b/tokio/src/sync/batch_semaphore.rs index a241f7922bf..84f88fb390e 100644 --- a/tokio/src/sync/batch_semaphore.rs +++ b/tokio/src/sync/batch_semaphore.rs @@ -147,6 +147,7 @@ impl Semaphore { #[cfg(all(tokio_unstable, feature = "tracing"))] let resource_span = { let resource_span = tracing::trace_span!( + parent: None, "runtime.resource", concrete_type = "Semaphore", kind = "Sync", diff --git a/tokio/src/time/sleep.rs b/tokio/src/time/sleep.rs index 9223396fe54..d5a68f09554 100644 --- a/tokio/src/time/sleep.rs +++ b/tokio/src/time/sleep.rs @@ -267,6 +267,7 @@ impl Sleep { let location = location.expect("should have location if tracing"); let resource_span = tracing::trace_span!( + parent: None, "runtime.resource", concrete_type = "Sleep", kind = "timer", diff --git a/tokio/tests/tracing-instrumentation/tests/sync.rs b/tokio/tests/tracing-instrumentation/tests/sync.rs index 37d07046a15..110928dda78 100644 --- a/tokio/tests/tracing-instrumentation/tests/sync.rs +++ b/tokio/tests/tracing-instrumentation/tests/sync.rs @@ -60,7 +60,7 @@ async fn test_mutex_creates_span() { .new_span(mutex_span.clone().with_explicit_parent(None)) .enter(mutex_span.clone()) .event(locked_event) - .new_span(batch_semaphore_span.clone()) + .new_span(batch_semaphore_span.clone().with_explicit_parent(None)) .enter(batch_semaphore_span.clone()) .event(batch_semaphore_permits_event) .exit(batch_semaphore_span.clone()) diff --git a/tokio/tests/tracing-instrumentation/tests/time.rs b/tokio/tests/tracing-instrumentation/tests/time.rs new file mode 100644 index 00000000000..4d5701598df --- /dev/null +++ b/tokio/tests/tracing-instrumentation/tests/time.rs @@ -0,0 +1,61 @@ +//! Tests for time resource instrumentation. +//! +//! These tests ensure that the instrumentation for tokio +//! synchronization primitives is correct. +use std::time::Duration; + +use tracing_mock::{expect, subscriber}; + +#[tokio::test] +async fn test_sleep_creates_span() { + let sleep_span = expect::span() + .named("runtime.resource") + .with_target("tokio::time::sleep"); + + let state_update = expect::event() + .with_target("runtime::resource::state_update") + .with_fields( + expect::field("duration") + .with_value(&(7_u64 + 1)) + .and(expect::field("duration.op").with_value(&"override")), + ); + + let async_op_span = expect::span() + .named("runtime.resource.async_op") + .with_target("tokio::time::sleep"); + + let async_op_poll_span = expect::span() + .named("runtime.resource.async_op.poll") + .with_target("tokio::time::sleep"); + + let (subscriber, handle) = subscriber::mock() + .new_span(sleep_span.clone().with_explicit_parent(None)) + .enter(sleep_span.clone()) + .event(state_update) + .new_span( + async_op_span + .clone() + .with_contextual_parent(Some("runtime.resource")) + .with_field(expect::field("source").with_value(&"Sleep::new_timeout")), + ) + .exit(sleep_span.clone()) + .enter(async_op_span.clone()) + .new_span( + async_op_poll_span + .clone() + .with_contextual_parent(Some("runtime.resource.async_op")), + ) + .exit(async_op_span.clone()) + .drop_span(async_op_span) + .drop_span(async_op_poll_span) + .drop_span(sleep_span) + .run_with_handle(); + + { + let _guard = tracing::subscriber::set_default(subscriber); + + _ = tokio::time::sleep(Duration::from_millis(7)); + } + + handle.assert_finished(); +} From 1077b0b29d1fca8c18bdd1f4779eb01dd5c35214 Mon Sep 17 00:00:00 2001 From: Motoyuki Kimura Date: Tue, 30 Jul 2024 02:39:44 +0900 Subject: [PATCH 091/119] io: use vectored io for `write_all_buf` when possible (#6724) --- tokio/src/io/util/write_all_buf.rs | 12 ++++++-- tokio/tests/io_write_all_buf.rs | 49 ++++++++++++++++++++++++++++++ 2 files changed, 59 insertions(+), 2 deletions(-) diff --git a/tokio/src/io/util/write_all_buf.rs b/tokio/src/io/util/write_all_buf.rs index 05af7fe99b3..dd4709aa810 100644 --- a/tokio/src/io/util/write_all_buf.rs +++ b/tokio/src/io/util/write_all_buf.rs @@ -3,7 +3,7 @@ use crate::io::AsyncWrite; use bytes::Buf; use pin_project_lite::pin_project; use std::future::Future; -use std::io; +use std::io::{self, IoSlice}; use std::marker::PhantomPinned; use std::pin::Pin; use std::task::{Context, Poll}; @@ -42,9 +42,17 @@ where type Output = io::Result<()>; fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + const MAX_VECTOR_ELEMENTS: usize = 64; + let me = self.project(); while me.buf.has_remaining() { - let n = ready!(Pin::new(&mut *me.writer).poll_write(cx, me.buf.chunk())?); + let n = if me.writer.is_write_vectored() { + let mut slices = [IoSlice::new(&[]); MAX_VECTOR_ELEMENTS]; + let cnt = me.buf.chunks_vectored(&mut slices); + ready!(Pin::new(&mut *me.writer).poll_write_vectored(cx, &slices[..cnt]))? + } else { + ready!(Pin::new(&mut *me.writer).poll_write(cx, me.buf.chunk())?) + }; me.buf.advance(n); if n == 0 { return Poll::Ready(Err(io::ErrorKind::WriteZero.into())); diff --git a/tokio/tests/io_write_all_buf.rs b/tokio/tests/io_write_all_buf.rs index 7c8b619358d..52ad5965c09 100644 --- a/tokio/tests/io_write_all_buf.rs +++ b/tokio/tests/io_write_all_buf.rs @@ -94,3 +94,52 @@ async fn write_buf_err() { Bytes::from_static(b"oworld") ); } + +#[tokio::test] +async fn write_all_buf_vectored() { + struct Wr { + buf: BytesMut, + } + impl AsyncWrite for Wr { + fn poll_write( + self: Pin<&mut Self>, + _cx: &mut Context<'_>, + _buf: &[u8], + ) -> Poll> { + // When executing `write_all_buf` with this writer, + // `poll_write` is not called. + panic!("shouldn't be called") + } + fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Ok(()).into() + } + fn poll_shutdown(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Ok(()).into() + } + fn poll_write_vectored( + mut self: Pin<&mut Self>, + _cx: &mut Context<'_>, + bufs: &[io::IoSlice<'_>], + ) -> Poll> { + for buf in bufs { + self.buf.extend_from_slice(buf); + } + let n = self.buf.len(); + Ok(n).into() + } + fn is_write_vectored(&self) -> bool { + // Enable vectored write. + true + } + } + + let mut wr = Wr { + buf: BytesMut::with_capacity(64), + }; + let mut buf = Bytes::from_static(b"hello") + .chain(Bytes::from_static(b" ")) + .chain(Bytes::from_static(b"world")); + + wr.write_all_buf(&mut buf).await.unwrap(); + assert_eq!(&wr.buf[..], b"hello world"); +} From 338e13b04baa3cf8db3feb1ba2266c0070a9efdf Mon Sep 17 00:00:00 2001 From: Motoyuki Kimura Date: Thu, 1 Aug 2024 23:45:35 +0900 Subject: [PATCH 092/119] task: use `NonZeroU64` for `task::Id` (#6733) --- tokio/src/runtime/task/id.rs | 23 ++++++++++++----------- tokio/src/runtime/task/mod.rs | 2 +- 2 files changed, 13 insertions(+), 12 deletions(-) diff --git a/tokio/src/runtime/task/id.rs b/tokio/src/runtime/task/id.rs index 82c8a7e7e90..9c3b1403ec2 100644 --- a/tokio/src/runtime/task/id.rs +++ b/tokio/src/runtime/task/id.rs @@ -1,6 +1,6 @@ use crate::runtime::context; -use std::fmt; +use std::{fmt, num::NonZeroU64}; /// An opaque ID that uniquely identifies a task relative to all other currently /// running tasks. @@ -24,7 +24,7 @@ use std::fmt; #[cfg_attr(docsrs, doc(cfg(all(feature = "rt", tokio_unstable))))] #[cfg_attr(not(tokio_unstable), allow(unreachable_pub))] #[derive(Clone, Copy, Debug, Hash, Eq, PartialEq)] -pub struct Id(pub(crate) u64); +pub struct Id(pub(crate) NonZeroU64); /// Returns the [`Id`] of the currently running task. /// @@ -78,21 +78,22 @@ impl Id { use crate::loom::sync::atomic::StaticAtomicU64; #[cfg(all(test, loom))] - { - crate::loom::lazy_static! { - static ref NEXT_ID: StaticAtomicU64 = StaticAtomicU64::new(1); - } - Self(NEXT_ID.fetch_add(1, Relaxed)) + crate::loom::lazy_static! { + static ref NEXT_ID: StaticAtomicU64 = StaticAtomicU64::new(1); } #[cfg(not(all(test, loom)))] - { - static NEXT_ID: StaticAtomicU64 = StaticAtomicU64::new(1); - Self(NEXT_ID.fetch_add(1, Relaxed)) + static NEXT_ID: StaticAtomicU64 = StaticAtomicU64::new(1); + + loop { + let id = NEXT_ID.fetch_add(1, Relaxed); + if let Some(id) = NonZeroU64::new(id) { + return Self(id); + } } } pub(crate) fn as_u64(&self) -> u64 { - self.0 + self.0.get() } } diff --git a/tokio/src/runtime/task/mod.rs b/tokio/src/runtime/task/mod.rs index aa799bf2be1..8248fc0b591 100644 --- a/tokio/src/runtime/task/mod.rs +++ b/tokio/src/runtime/task/mod.rs @@ -532,6 +532,6 @@ unsafe impl sharded_list::ShardedListItem for Task { unsafe fn get_shard_id(target: NonNull) -> usize { // SAFETY: The caller guarantees that `target` points at a valid task. let task_id = unsafe { Header::get_id(target) }; - task_id.0 as usize + task_id.0.get() as usize } } From ab53bf0c4727ae63c6a3a3d772b7bd837d2f49c3 Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Sat, 3 Aug 2024 11:32:50 +0100 Subject: [PATCH 093/119] runtime: prevent niche-optimization to avoid triggering miri (#6744) --- tokio/src/future/maybe_done.rs | 52 ++++++++++++++++++ tokio/src/runtime/task/core.rs | 1 + tokio/src/runtime/tests/task.rs | 94 +++++++++++++++++++++++++++++++++ tokio/tests/macros_join.rs | 2 +- 4 files changed, 148 insertions(+), 1 deletion(-) diff --git a/tokio/src/future/maybe_done.rs b/tokio/src/future/maybe_done.rs index 8b270b3a01f..9ae795f7a7f 100644 --- a/tokio/src/future/maybe_done.rs +++ b/tokio/src/future/maybe_done.rs @@ -10,6 +10,7 @@ pin_project! { #[derive(Debug)] #[project = MaybeDoneProj] #[project_replace = MaybeDoneProjReplace] + #[repr(C)] // https://github.com/rust-lang/miri/issues/3780 pub enum MaybeDone { /// A not-yet-completed future. Future { #[pin] future: Fut }, @@ -69,3 +70,54 @@ impl Future for MaybeDone { Poll::Ready(()) } } + +// Test for https://github.com/tokio-rs/tokio/issues/6729 +#[cfg(test)] +mod miri_tests { + use super::maybe_done; + + use std::{ + future::Future, + pin::Pin, + sync::Arc, + task::{Context, Poll, Wake}, + }; + + struct ThingAdder<'a> { + thing: &'a mut String, + } + + impl Future for ThingAdder<'_> { + type Output = (); + + fn poll(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll { + unsafe { + *self.get_unchecked_mut().thing += ", world"; + } + Poll::Pending + } + } + + #[test] + fn maybe_done_miri() { + let mut thing = "hello".to_owned(); + + // The async block is necessary to trigger the miri failure. + #[allow(clippy::redundant_async_block)] + let fut = async move { ThingAdder { thing: &mut thing }.await }; + + let mut fut = maybe_done(fut); + let mut fut = unsafe { Pin::new_unchecked(&mut fut) }; + + let waker = Arc::new(DummyWaker).into(); + let mut ctx = Context::from_waker(&waker); + assert_eq!(fut.as_mut().poll(&mut ctx), Poll::Pending); + assert_eq!(fut.as_mut().poll(&mut ctx), Poll::Pending); + } + + struct DummyWaker; + + impl Wake for DummyWaker { + fn wake(self: Arc) {} + } +} diff --git a/tokio/src/runtime/task/core.rs b/tokio/src/runtime/task/core.rs index 108b06bc8b6..78977084adb 100644 --- a/tokio/src/runtime/task/core.rs +++ b/tokio/src/runtime/task/core.rs @@ -196,6 +196,7 @@ generate_addr_of_methods! { } /// Either the future or the output. +#[repr(C)] // https://github.com/rust-lang/miri/issues/3780 pub(super) enum Stage { Running(T), Finished(super::Result), diff --git a/tokio/src/runtime/tests/task.rs b/tokio/src/runtime/tests/task.rs index fc1e4089070..310c69e8b2a 100644 --- a/tokio/src/runtime/tests/task.rs +++ b/tokio/src/runtime/tests/task.rs @@ -223,6 +223,100 @@ fn shutdown_immediately() { }) } +// Test for https://github.com/tokio-rs/tokio/issues/6729 +#[test] +fn spawn_niche_in_task() { + use crate::future::poll_fn; + use std::task::{Context, Poll, Waker}; + + with(|rt| { + let state = Arc::new(Mutex::new(State::new())); + + let mut subscriber = Subscriber::new(Arc::clone(&state), 1); + rt.spawn(async move { + subscriber.wait().await; + subscriber.wait().await; + }); + + rt.spawn(async move { + state.lock().unwrap().set_version(2); + state.lock().unwrap().set_version(0); + }); + + rt.tick_max(10); + assert!(rt.is_empty()); + rt.shutdown(); + }); + + pub(crate) struct Subscriber { + state: Arc>, + observed_version: u64, + waker_key: Option, + } + + impl Subscriber { + pub(crate) fn new(state: Arc>, version: u64) -> Self { + Self { + state, + observed_version: version, + waker_key: None, + } + } + + pub(crate) async fn wait(&mut self) { + poll_fn(|cx| { + self.state + .lock() + .unwrap() + .poll_update(&mut self.observed_version, &mut self.waker_key, cx) + .map(|_| ()) + }) + .await; + } + } + + struct State { + version: u64, + wakers: Vec, + } + + impl State { + pub(crate) fn new() -> Self { + Self { + version: 1, + wakers: Vec::new(), + } + } + + pub(crate) fn poll_update( + &mut self, + observed_version: &mut u64, + waker_key: &mut Option, + cx: &Context<'_>, + ) -> Poll> { + if self.version == 0 { + *waker_key = None; + Poll::Ready(None) + } else if *observed_version < self.version { + *waker_key = None; + *observed_version = self.version; + Poll::Ready(Some(())) + } else { + self.wakers.push(cx.waker().clone()); + *waker_key = Some(self.wakers.len()); + Poll::Pending + } + } + + pub(crate) fn set_version(&mut self, version: u64) { + self.version = version; + for waker in self.wakers.drain(..) { + waker.wake(); + } + } + } +} + #[test] fn spawn_during_shutdown() { static DID_SPAWN: AtomicBool = AtomicBool::new(false); diff --git a/tokio/tests/macros_join.rs b/tokio/tests/macros_join.rs index 4deaf120a95..083eecf2976 100644 --- a/tokio/tests/macros_join.rs +++ b/tokio/tests/macros_join.rs @@ -81,7 +81,7 @@ fn join_size() { let ready2 = future::ready(0i32); tokio::join!(ready1, ready2) }; - assert_eq!(mem::size_of_val(&fut), 40); + assert_eq!(mem::size_of_val(&fut), 48); } async fn non_cooperative_task(permits: Arc) -> usize { From 1e798d26ed16e1e95f457f347749f06ba0f32df5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adam=20Cig=C3=A1nek?= Date: Tue, 6 Aug 2024 16:22:31 +0200 Subject: [PATCH 094/119] time: wake `DelayQueue` when removing last item (#6752) --- tokio-util/src/time/delay_queue.rs | 6 ++++++ tokio-util/tests/time_delay_queue.rs | 13 +++++++++++++ 2 files changed, 19 insertions(+) diff --git a/tokio-util/src/time/delay_queue.rs b/tokio-util/src/time/delay_queue.rs index 2b33e36188d..55dd311a03e 100644 --- a/tokio-util/src/time/delay_queue.rs +++ b/tokio-util/src/time/delay_queue.rs @@ -766,6 +766,12 @@ impl DelayQueue { } } + if self.slab.is_empty() { + if let Some(waker) = self.waker.take() { + waker.wake(); + } + } + Expired { key: Key::new(key.index), data: data.inner, diff --git a/tokio-util/tests/time_delay_queue.rs b/tokio-util/tests/time_delay_queue.rs index 6616327d41c..9915b11b58a 100644 --- a/tokio-util/tests/time_delay_queue.rs +++ b/tokio-util/tests/time_delay_queue.rs @@ -880,6 +880,19 @@ async fn peek() { assert!(queue.peek().is_none()); } +#[tokio::test(start_paused = true)] +async fn wake_after_remove_last() { + let mut queue = task::spawn(DelayQueue::new()); + let key = queue.insert("foo", ms(1000)); + + assert_pending!(poll!(queue)); + + queue.remove(&key); + + assert!(queue.is_woken()); + assert!(assert_ready!(poll!(queue)).is_none()); +} + fn ms(n: u64) -> Duration { Duration::from_millis(n) } From 0ecf5f0f03a3f98d8676f87c044b34d900137c7e Mon Sep 17 00:00:00 2001 From: Austin Bonander Date: Wed, 7 Aug 2024 07:54:02 -0700 Subject: [PATCH 095/119] task: include panic msg when printing `JoinError` (#6753) --- tokio/src/runtime/task/error.rs | 37 ++++++++++- tokio/src/util/sync_wrapper.rs | 11 ++++ tokio/tests/task_abort.rs | 110 ++++++++++++++++++++++++++++++++ 3 files changed, 156 insertions(+), 2 deletions(-) diff --git a/tokio/src/runtime/task/error.rs b/tokio/src/runtime/task/error.rs index d0d731322bf..9716901773f 100644 --- a/tokio/src/runtime/task/error.rs +++ b/tokio/src/runtime/task/error.rs @@ -140,7 +140,18 @@ impl fmt::Display for JoinError { fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { match &self.repr { Repr::Cancelled => write!(fmt, "task {} was cancelled", self.id), - Repr::Panic(_) => write!(fmt, "task {} panicked", self.id), + Repr::Panic(p) => match panic_payload_as_str(p) { + Some(panic_str) => { + write!( + fmt, + "task {} panicked with message {:?}", + self.id, panic_str + ) + } + None => { + write!(fmt, "task {} panicked", self.id) + } + }, } } } @@ -149,7 +160,12 @@ impl fmt::Debug for JoinError { fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { match &self.repr { Repr::Cancelled => write!(fmt, "JoinError::Cancelled({:?})", self.id), - Repr::Panic(_) => write!(fmt, "JoinError::Panic({:?}, ...)", self.id), + Repr::Panic(p) => match panic_payload_as_str(p) { + Some(panic_str) => { + write!(fmt, "JoinError::Panic({:?}, {:?}, ...)", self.id, panic_str) + } + None => write!(fmt, "JoinError::Panic({:?}, ...)", self.id), + }, } } } @@ -167,3 +183,20 @@ impl From for io::Error { ) } } + +fn panic_payload_as_str(payload: &SyncWrapper>) -> Option<&str> { + // Panic payloads are almost always `String` (if invoked with formatting arguments) + // or `&'static str` (if invoked with a string literal). + // + // Non-string panic payloads have niche use-cases, + // so we don't really need to worry about those. + if let Some(s) = payload.downcast_ref_sync::() { + return Some(s); + } + + if let Some(s) = payload.downcast_ref_sync::<&'static str>() { + return Some(s); + } + + None +} diff --git a/tokio/src/util/sync_wrapper.rs b/tokio/src/util/sync_wrapper.rs index 5ffc8f96b16..62738e4d0a5 100644 --- a/tokio/src/util/sync_wrapper.rs +++ b/tokio/src/util/sync_wrapper.rs @@ -3,6 +3,8 @@ //! //! A similar primitive is provided in the `sync_wrapper` crate. +use std::any::Any; + pub(crate) struct SyncWrapper { value: T, } @@ -24,3 +26,12 @@ impl SyncWrapper { self.value } } + +impl SyncWrapper> { + /// Attempt to downcast using `Any::downcast_ref()` to a type that is known to be `Sync`. + pub(crate) fn downcast_ref_sync(&self) -> Option<&T> { + // SAFETY: if the downcast fails, the inner value is not touched, + // so no thread-safety violation can occur. + self.value.downcast_ref() + } +} diff --git a/tokio/tests/task_abort.rs b/tokio/tests/task_abort.rs index 09414f094ed..0e742de13e2 100644 --- a/tokio/tests/task_abort.rs +++ b/tokio/tests/task_abort.rs @@ -220,3 +220,113 @@ fn test_abort_task_that_panics_on_drop_returned() { assert!(handle.await.unwrap_err().is_panic()); }); } + +// It's not clear where these tests belong. This was the place suggested by @Darksonn: +// https://github.com/tokio-rs/tokio/pull/6753#issuecomment-2271434176 +/// Checks that a `JoinError` with a panic payload prints the expected text. +#[test] +#[cfg(panic = "unwind")] +fn test_join_error_display() { + let rt = Builder::new_current_thread().build().unwrap(); + + rt.block_on(async move { + // `String` payload + let join_err = tokio::spawn(async move { + let value = 1234; + panic!("Format-args payload: {}", value) + }) + .await + .unwrap_err(); + + // We can't assert the full output because the task ID can change. + let join_err_str = join_err.to_string(); + + assert!( + join_err_str.starts_with("task ") + && join_err_str.ends_with(" panicked with message \"Format-args payload: 1234\""), + "Unexpected join_err_str {:?}", + join_err_str + ); + + // `&'static str` payload + let join_err = tokio::spawn(async move { panic!("Const payload") }) + .await + .unwrap_err(); + + let join_err_str = join_err.to_string(); + + assert!( + join_err_str.starts_with("task ") + && join_err_str.ends_with(" panicked with message \"Const payload\""), + "Unexpected join_err_str {:?}", + join_err_str + ); + + // Non-string payload + let join_err = tokio::spawn(async move { std::panic::panic_any(1234i32) }) + .await + .unwrap_err(); + + let join_err_str = join_err.to_string(); + + assert!( + join_err_str.starts_with("task ") && join_err_str.ends_with(" panicked"), + "Unexpected join_err_str {:?}", + join_err_str + ); + }); +} + +/// Checks that a `JoinError` with a panic payload prints the expected text from `Debug`. +#[test] +#[cfg(panic = "unwind")] +fn test_join_error_debug() { + let rt = Builder::new_current_thread().build().unwrap(); + + rt.block_on(async move { + // `String` payload + let join_err = tokio::spawn(async move { + let value = 1234; + panic!("Format-args payload: {}", value) + }) + .await + .unwrap_err(); + + // We can't assert the full output because the task ID can change. + let join_err_str = format!("{:?}", join_err); + + assert!( + join_err_str.starts_with("JoinError::Panic(Id(") + && join_err_str.ends_with("), \"Format-args payload: 1234\", ...)"), + "Unexpected join_err_str {:?}", + join_err_str + ); + + // `&'static str` payload + let join_err = tokio::spawn(async move { panic!("Const payload") }) + .await + .unwrap_err(); + + let join_err_str = format!("{:?}", join_err); + + assert!( + join_err_str.starts_with("JoinError::Panic(Id(") + && join_err_str.ends_with("), \"Const payload\", ...)"), + "Unexpected join_err_str {:?}", + join_err_str + ); + + // Non-string payload + let join_err = tokio::spawn(async move { std::panic::panic_any(1234i32) }) + .await + .unwrap_err(); + + let join_err_str = format!("{:?}", join_err); + + assert!( + join_err_str.starts_with("JoinError::Panic(Id(") && join_err_str.ends_with("), ...)"), + "Unexpected join_err_str {:?}", + join_err_str + ); + }); +} From a491b16a89f6df83efaf8d00de0786d6aeaec6b7 Mon Sep 17 00:00:00 2001 From: "Caleb Leinz (he/him)" <103841857+cmleinz@users.noreply.github.com> Date: Wed, 7 Aug 2024 15:06:37 -0700 Subject: [PATCH 096/119] sync: add `{TrySendError,SendTimeoutError}::into_inner` (#6755) --- tokio/src/sync/mpsc/error.rs | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/tokio/src/sync/mpsc/error.rs b/tokio/src/sync/mpsc/error.rs index 2fc24b38d83..9fef7fd9c03 100644 --- a/tokio/src/sync/mpsc/error.rs +++ b/tokio/src/sync/mpsc/error.rs @@ -36,6 +36,16 @@ pub enum TrySendError { Closed(T), } +impl TrySendError { + /// Consume the `TrySendError`, returning the unsent value. + pub fn into_inner(self) -> T { + match self { + TrySendError::Full(val) => val, + TrySendError::Closed(val) => val, + } + } +} + impl fmt::Debug for TrySendError { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { match *self { @@ -123,6 +133,16 @@ cfg_time! { Closed(T), } + impl SendTimeoutError { + /// Consume the `SendTimeoutError`, returning the unsent value. + pub fn into_inner(self) -> T { + match self { + SendTimeoutError::Timeout(val) => val, + SendTimeoutError::Closed(val) => val, + } + } + } + impl fmt::Debug for SendTimeoutError { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { match *self { From 6ad1912353d244e4f12c6e9c7e6c672d2c0e4467 Mon Sep 17 00:00:00 2001 From: Sainath Singineedi <44405294+sainad2222@users.noreply.github.com> Date: Sat, 10 Aug 2024 02:27:31 +0530 Subject: [PATCH 097/119] task: add `#[must_use]` to `JoinHandle::abort_handle` (#6762) --- tokio/src/runtime/task/join.rs | 1 + 1 file changed, 1 insertion(+) diff --git a/tokio/src/runtime/task/join.rs b/tokio/src/runtime/task/join.rs index e646f6575ed..7e47e568730 100644 --- a/tokio/src/runtime/task/join.rs +++ b/tokio/src/runtime/task/join.rs @@ -296,6 +296,7 @@ impl JoinHandle { /// # } /// ``` /// [cancelled]: method@super::error::JoinError::is_cancelled + #[must_use = "abort handles do nothing unless `.abort` is called"] pub fn abort_handle(&self) -> super::AbortHandle { self.raw.ref_inc(); super::AbortHandle::new(self.raw) From 17819062e27b48570dd7f510b8bf8cf7b0e52cf4 Mon Sep 17 00:00:00 2001 From: Vrtgs Date: Sun, 11 Aug 2024 12:55:22 +0300 Subject: [PATCH 098/119] tokio: update code according to new MSRV (#6764) --- tokio-util/src/codec/length_delimited.rs | 17 +---------------- tokio/src/fs/try_exists.rs | 8 +------- tokio/src/io/util/read_int.rs | 3 +-- tokio/src/io/util/write_int.rs | 3 +-- tokio/src/runtime/blocking/pool.rs | 6 +++--- .../runtime/scheduler/multi_thread/worker.rs | 11 +---------- .../scheduler/multi_thread_alt/worker.rs | 11 +---------- tokio/src/runtime/task/core.rs | 4 +--- tokio/src/task/spawn.rs | 2 +- tokio/src/util/bit.rs | 9 ++------- tokio/tests/io_async_fd.rs | 2 +- 11 files changed, 14 insertions(+), 62 deletions(-) diff --git a/tokio-util/src/codec/length_delimited.rs b/tokio-util/src/codec/length_delimited.rs index c1f24167a06..fed49ca8a79 100644 --- a/tokio-util/src/codec/length_delimited.rs +++ b/tokio-util/src/codec/length_delimited.rs @@ -1049,28 +1049,13 @@ impl Builder { } fn adjust_max_frame_len(&mut self) { - // This function is basically `std::u64::saturating_add_signed`. Since it - // requires MSRV 1.66, its implementation is copied here. - // - // TODO: use the method from std when MSRV becomes >= 1.66 - fn saturating_add_signed(num: u64, rhs: i64) -> u64 { - let (res, overflow) = num.overflowing_add(rhs as u64); - if overflow == (rhs < 0) { - res - } else if overflow { - u64::MAX - } else { - 0 - } - } - // Calculate the maximum number that can be represented using `length_field_len` bytes. let max_number = match 1u64.checked_shl((8 * self.length_field_len) as u32) { Some(shl) => shl - 1, None => u64::MAX, }; - let max_allowed_len = saturating_add_signed(max_number, self.length_adjustment as i64); + let max_allowed_len = max_number.saturating_add_signed(self.length_adjustment as i64); if self.max_frame_len as u64 > max_allowed_len { self.max_frame_len = usize::try_from(max_allowed_len).unwrap_or(usize::MAX); diff --git a/tokio/src/fs/try_exists.rs b/tokio/src/fs/try_exists.rs index 069518bf946..2e8de04e0c5 100644 --- a/tokio/src/fs/try_exists.rs +++ b/tokio/src/fs/try_exists.rs @@ -24,11 +24,5 @@ use std::path::Path; /// ``` pub async fn try_exists(path: impl AsRef) -> io::Result { let path = path.as_ref().to_owned(); - // std's Path::try_exists is not available for current Rust min supported version. - // Current implementation is based on its internal implementation instead. - match asyncify(move || std::fs::metadata(path)).await { - Ok(_) => Ok(true), - Err(error) if error.kind() == std::io::ErrorKind::NotFound => Ok(false), - Err(error) => Err(error), - } + asyncify(move || path.try_exists()).await } diff --git a/tokio/src/io/util/read_int.rs b/tokio/src/io/util/read_int.rs index 164dcf59632..63324fb5c25 100644 --- a/tokio/src/io/util/read_int.rs +++ b/tokio/src/io/util/read_int.rs @@ -6,13 +6,12 @@ use std::future::Future; use std::io; use std::io::ErrorKind::UnexpectedEof; use std::marker::PhantomPinned; -use std::mem::size_of; use std::pin::Pin; use std::task::{Context, Poll}; macro_rules! reader { ($name:ident, $ty:ty, $reader:ident) => { - reader!($name, $ty, $reader, size_of::<$ty>()); + reader!($name, $ty, $reader, std::mem::size_of::<$ty>()); }; ($name:ident, $ty:ty, $reader:ident, $bytes:expr) => { pin_project! { diff --git a/tokio/src/io/util/write_int.rs b/tokio/src/io/util/write_int.rs index 63cd49126fa..1eb889097be 100644 --- a/tokio/src/io/util/write_int.rs +++ b/tokio/src/io/util/write_int.rs @@ -5,13 +5,12 @@ use pin_project_lite::pin_project; use std::future::Future; use std::io; use std::marker::PhantomPinned; -use std::mem::size_of; use std::pin::Pin; use std::task::{Context, Poll}; macro_rules! writer { ($name:ident, $ty:ty, $writer:ident) => { - writer!($name, $ty, $writer, size_of::<$ty>()); + writer!($name, $ty, $writer, std::mem::size_of::<$ty>()); }; ($name:ident, $ty:ty, $writer:ident, $bytes:expr) => { pin_project! { diff --git a/tokio/src/runtime/blocking/pool.rs b/tokio/src/runtime/blocking/pool.rs index bc854f36d69..8bd44278e2a 100644 --- a/tokio/src/runtime/blocking/pool.rs +++ b/tokio/src/runtime/blocking/pool.rs @@ -461,7 +461,7 @@ impl Spawner { shutdown_tx: shutdown::Sender, rt: &Handle, id: usize, - ) -> std::io::Result> { + ) -> io::Result> { let mut builder = thread::Builder::new().name((self.inner.thread_name)()); if let Some(stack_size) = self.inner.stack_size { @@ -497,8 +497,8 @@ cfg_unstable_metrics! { // Tells whether the error when spawning a thread is temporary. #[inline] -fn is_temporary_os_thread_error(error: &std::io::Error) -> bool { - matches!(error.kind(), std::io::ErrorKind::WouldBlock) +fn is_temporary_os_thread_error(error: &io::Error) -> bool { + matches!(error.kind(), io::ErrorKind::WouldBlock) } impl Inner { diff --git a/tokio/src/runtime/scheduler/multi_thread/worker.rs b/tokio/src/runtime/scheduler/multi_thread/worker.rs index 9b521efc9b1..cefa8704bf6 100644 --- a/tokio/src/runtime/scheduler/multi_thread/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread/worker.rs @@ -1014,7 +1014,7 @@ impl Core { .tuned_global_queue_interval(&worker.handle.shared.config); // Smooth out jitter - if abs_diff(self.global_queue_interval, next) > 2 { + if u32::abs_diff(self.global_queue_interval, next) > 2 { self.global_queue_interval = next; } } @@ -1249,12 +1249,3 @@ fn with_current(f: impl FnOnce(Option<&Context>) -> R) -> R { _ => f(None), }) } - -// `u32::abs_diff` is not available on Tokio's MSRV. -fn abs_diff(a: u32, b: u32) -> u32 { - if a > b { - a - b - } else { - b - a - } -} diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs index 9f6af9d4d7a..b55dc317a77 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs @@ -1292,7 +1292,7 @@ impl Worker { let next = core.stats.tuned_global_queue_interval(&cx.shared().config); // Smooth out jitter - if abs_diff(self.global_queue_interval, next) > 2 { + if u32::abs_diff(self.global_queue_interval, next) > 2 { self.global_queue_interval = next; } } @@ -1592,12 +1592,3 @@ fn with_current(f: impl FnOnce(Option<&Context>) -> R) -> R { _ => f(None), }) } - -// `u32::abs_diff` is not available on Tokio's MSRV. -fn abs_diff(a: u32, b: u32) -> u32 { - if a > b { - a - b - } else { - b - a - } -} diff --git a/tokio/src/runtime/task/core.rs b/tokio/src/runtime/task/core.rs index 78977084adb..590e3fbc9d5 100644 --- a/tokio/src/runtime/task/core.rs +++ b/tokio/src/runtime/task/core.rs @@ -489,7 +489,5 @@ impl Trailer { #[test] #[cfg(not(loom))] fn header_lte_cache_line() { - use std::mem::size_of; - - assert!(size_of::
() <= 8 * size_of::<*const ()>()); + assert!(std::mem::size_of::
() <= 8 * std::mem::size_of::<*const ()>()); } diff --git a/tokio/src/task/spawn.rs b/tokio/src/task/spawn.rs index c9142cc5fad..ec7a18c81ea 100644 --- a/tokio/src/task/spawn.rs +++ b/tokio/src/task/spawn.rs @@ -5,7 +5,7 @@ use std::future::Future; cfg_rt! { /// Spawns a new asynchronous task, returning a - /// [`JoinHandle`](super::JoinHandle) for it. + /// [`JoinHandle`](JoinHandle) for it. /// /// The provided future will start running in the background immediately /// when `spawn` is called, even if you don't await the returned diff --git a/tokio/src/util/bit.rs b/tokio/src/util/bit.rs index 72e25e45fc8..d71ad548ce8 100644 --- a/tokio/src/util/bit.rs +++ b/tokio/src/util/bit.rs @@ -16,7 +16,7 @@ impl Pack { /// Value is packed in the `width` more-significant bits. pub(crate) const fn then(&self, width: u32) -> Pack { - let shift = pointer_width() - self.mask.leading_zeros(); + let shift = usize::BITS - self.mask.leading_zeros(); let mask = mask_for(width) << shift; Pack { mask, shift } @@ -24,7 +24,7 @@ impl Pack { /// Width, in bits, dedicated to storing the value. pub(crate) const fn width(&self) -> u32 { - pointer_width() - (self.mask >> self.shift).leading_zeros() + usize::BITS - (self.mask >> self.shift).leading_zeros() } /// Max representable value. @@ -52,11 +52,6 @@ impl fmt::Debug for Pack { } } -/// Returns the width of a pointer in bits. -pub(crate) const fn pointer_width() -> u32 { - std::mem::size_of::() as u32 * 8 -} - /// Returns a `usize` with the right-most `n` bits set. pub(crate) const fn mask_for(n: u32) -> usize { let shift = 1usize.wrapping_shl(n - 1); diff --git a/tokio/tests/io_async_fd.rs b/tokio/tests/io_async_fd.rs index 4e6f630eb93..3ab1cebd884 100644 --- a/tokio/tests/io_async_fd.rs +++ b/tokio/tests/io_async_fd.rs @@ -372,7 +372,7 @@ async fn multiple_waiters() { panic!("Tasks exited unexpectedly") }, _ = barrier.wait() => {} - }; + } b.write_all(b"0").unwrap(); From 694577fa8563dfe62878a4b3b4879a2199e3c409 Mon Sep 17 00:00:00 2001 From: Eliza Weisman Date: Mon, 12 Aug 2024 09:22:21 -0700 Subject: [PATCH 099/119] Add config file to enable Buildomat CI for illumos (#6768) ## Motivation As described in #6763, Tokio compiles for the [illumos] operating system, but we don't presently have automated tests on illumos. We would like to add illumos CI jobs for Tokio using [Buildomat], a CI system which supports illumos. Buildomat CI jobs for Tokio will run on infrastructure contributed by Oxide Computer Company. In order for Buildomat to watch for commits to the repo, we must first add a configuration file in `.github/buildomat/config.toml` with the `enable = true` key. This config file must be present on the repo's main branch for Buildomat to enable builds for the repo. See [here] for details. ## Solution This branch adds a `.github/buildomat` directory containing a config file and a README summarizing what the configs in that directory are for, as well as documenting how to get help diagnosing illumos CI failures. This branch does *not* add scripts for actually running CI jobs on Buildomat. Since the config file must be present on the repo's main branch before Buildomat runs CI jobs for the repo, I'd like to merge the config file separately from the actual build scripts. This way, I can actually have the build jobs run on the PR that adds them, making it easier to ensure everything is working correctly before merging. Closes #6766, which is obsoleted by this branch. [illumos]: https://www.illumos.org/ [Buildomat]: https://github.com/oxidecomputer/ [here]: https://github.com/oxidecomputer/buildomat/blob/main/README.md#per-repository-configuration --- .github/buildomat/README.md | 20 ++++++++++++++++++++ .github/buildomat/config.toml | 8 ++++++++ 2 files changed, 28 insertions(+) create mode 100644 .github/buildomat/README.md create mode 100644 .github/buildomat/config.toml diff --git a/.github/buildomat/README.md b/.github/buildomat/README.md new file mode 100644 index 00000000000..bde5bc90760 --- /dev/null +++ b/.github/buildomat/README.md @@ -0,0 +1,20 @@ +# Buildomat illumos CI + +This directory contains CI configurations for the [illumos] operating system. +Tokio's illumos CI jobs are run using [Buildomat], a CI system developed by +Oxide Computer, which supports illumos. See [the Buildomat README] for more +details. + +## illumos-Specific CI Failures + +If your pull request's CI build fails on illumos, and you aren't able to easily +reproduce the failure on other operating systems, don't worry! The +[tokio-rs/illumos] team is responsible for maintaining Tokio's illumos support, +and can be called on to assist contributors with illumos-specific issues. Please +feel free to tag @tokio-rs/illumos to ask for help resolving build failures on +illumos + +[illumos]: https://www.illumos.org/ +[Buildomat]: https://github.com/oxidecomputer/buildomat +[the Buildomat README]: https://github.com/oxidecomputer/buildomat +[tokio-rs/illumos]: https://github.com/orgs/tokio-rs/teams/illumos diff --git a/.github/buildomat/config.toml b/.github/buildomat/config.toml new file mode 100644 index 00000000000..5c240c2a0a9 --- /dev/null +++ b/.github/buildomat/config.toml @@ -0,0 +1,8 @@ +# Repository-level Buildomat configuration. +# See: https://github.com/oxidecomputer/buildomat#per-repository-configuration + +# Enable buildomat. This one should be self-explanatory. +enable = true +# Allow CI runs for PRs from users outside the `tokio-rs` organization. Our +# buildomat jobs don't touch any secrets/keys, so this should be fine. +org_only = false From 39c3c19bbd889bfb2846ab4c985e6ab941309519 Mon Sep 17 00:00:00 2001 From: Rafael Bachmann Date: Wed, 14 Aug 2024 14:49:28 +0100 Subject: [PATCH 100/119] macros: improve documentation for `select!` (#6774) --- tokio/src/macros/select.rs | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/tokio/src/macros/select.rs b/tokio/src/macros/select.rs index 5e3b661415b..d1e59d34736 100644 --- a/tokio/src/macros/select.rs +++ b/tokio/src/macros/select.rs @@ -39,13 +39,13 @@ macro_rules! doc { /// 2. Aggregate the ``s from each branch, including the /// disabled ones. If the branch is disabled, `` is still /// evaluated, but the resulting future is not polled. - /// 3. Concurrently await on the results for all remaining ``s. - /// 4. Once an `` returns a value, attempt to apply the value - /// to the provided ``, if the pattern matches, evaluate `` - /// and return. If the pattern **does not** match, disable the current branch - /// and for the remainder of the current call to `select!`. Continue from step 3. - /// 5. If **all** branches are disabled, evaluate the `else` expression. If no - /// else branch is provided, panic. + /// 3. If **all** branches are disabled: go to step 6. + /// 4. Concurrently await on the results for all remaining ``s. + /// 5. Once an `` returns a value, attempt to apply the value to the + /// provided ``. If the pattern matches, evaluate the `` and return. + /// If the pattern **does not** match, disable the current branch for the remainder of + /// the current call to `select!`. Continue from step 3. + /// 6. Evaluate the `else` expression. If no else expression is provided, panic. /// /// # Runtime characteristics /// From 2d697fc92b012bf274e70d0f70bf7e4717a59f31 Mon Sep 17 00:00:00 2001 From: Eliza Weisman Date: Thu, 15 Aug 2024 08:44:36 -0700 Subject: [PATCH 101/119] tests: handle spurious EWOULDBLOCK in io_async_fd (#6776) * tests: handle spurious EWOULDBLOCK in io_async_fd ## Motivation The `io_async_fd.rs` tests contain a `drain()` function, which currently performs synchronous reads from a UDS socket until it returns `io::ErrorKind::WouldBlock` (i.e., errno `EWOULDBLOCK`/`EAGAIN`). The *intent* behind this function is to ensure that all data has been drained from the UDS socket's buffer...which is what it appears to do...on Linux. On other systems, it appears that an `EWOULDBLOCK` or `EAGAIN` may be returned before enough data has been read from the UDS socket to result in the other end being notified that the socket is now writable. In particular, this appears to be the case on illumos, where the tests using this function hang forever (see [this comment][1] on PR #6769). To my knowledge, this behavior is still POSIX-compliant --- the reader will still be notified that the socket is readable, and if it were actually doing non-blocking IO, it would continue reading upon receipt of that notification. So, relying on `EWOULDBLOCK` to indicate that the socket has been sufficiently drained appears to rely on Linux/FreeBSD behavior that isn't necessarily portable to other Unices. ## Solution This commit changes the `drain()` function to take an argument for the number of bytes *written* to the socket previously, and continue looping until it has read that many bytes, regardless of whether `EWOULDBLOCK` is returned. This should ensure that the socket is drained on all POSIX-compliant systems, and indeed, the `io_async_fd::reset_writable` and `io_async_fd::poll_fns` tests no longer hang forever on illumos. I think making this change is an appropriate solution to the test failure here, as the `drain()` function is part of the test, rather than the code in Tokio *being* tested, and (as I mentioned above) the use of blocking reads on a non-blocking socket without a mechanism to continue reading when the socket becomes readable again is not really something a real life program seems likely to do. Ensuring that all the written bytes have been read by passing in a byte count seems more faithful to what the test is actually *trying* to do here, anyway. Thanks to @jclulow for debugging what was going on here! This change was cherry-picked from commit f18d6ed7d4e0724bbe14db5519d7c80b3227a1a9 from PR #6769, so that the fix can be merged separately. [1]: https://github.com/tokio-rs/tokio/pull/6769#issuecomment-2284753794 Signed-off-by: Eliza Weisman --- tokio/tests/io_async_fd.rs | 26 ++++++++++++++------------ 1 file changed, 14 insertions(+), 12 deletions(-) diff --git a/tokio/tests/io_async_fd.rs b/tokio/tests/io_async_fd.rs index 3ab1cebd884..f4dcfcf0927 100644 --- a/tokio/tests/io_async_fd.rs +++ b/tokio/tests/io_async_fd.rs @@ -135,15 +135,14 @@ fn socketpair() -> (FileDescriptor, FileDescriptor) { fds } -fn drain(mut fd: &FileDescriptor) { +fn drain(mut fd: &FileDescriptor, mut amt: usize) { let mut buf = [0u8; 512]; - #[allow(clippy::unused_io_amount)] - loop { + while amt > 0 { match fd.read(&mut buf[..]) { - Err(e) if e.kind() == ErrorKind::WouldBlock => break, + Err(e) if e.kind() == ErrorKind::WouldBlock => {} Ok(0) => panic!("unexpected EOF"), Err(e) => panic!("unexpected error: {:?}", e), - Ok(_) => continue, + Ok(x) => amt -= x, } } } @@ -219,10 +218,10 @@ async fn reset_writable() { let mut guard = afd_a.writable().await.unwrap(); // Write until we get a WouldBlock. This also clears the ready state. - while guard - .try_io(|_| afd_a.get_ref().write(&[0; 512][..])) - .is_ok() - {} + let mut bytes = 0; + while let Ok(Ok(amt)) = guard.try_io(|_| afd_a.get_ref().write(&[0; 512][..])) { + bytes += amt; + } // Writable state should be cleared now. let writable = afd_a.writable(); @@ -234,7 +233,7 @@ async fn reset_writable() { } // Read from the other side; we should become writable now. - drain(&b); + drain(&b, bytes); let _ = writable.await.unwrap(); } @@ -386,7 +385,10 @@ async fn poll_fns() { let afd_b = Arc::new(AsyncFd::new(b).unwrap()); // Fill up the write side of A - while afd_a.get_ref().write(&[0; 512]).is_ok() {} + let mut bytes = 0; + while let Ok(amt) = afd_a.get_ref().write(&[0; 512]) { + bytes += amt; + } let waker = TestWaker::new(); @@ -446,7 +448,7 @@ async fn poll_fns() { } // Make it writable now - drain(afd_b.get_ref()); + drain(afd_b.get_ref(), bytes); // now we should be writable (ie - the waker for poll_write should still be registered after we wake the read side) let _ = write_fut.await; From 56f3f40c1567b906279f0d6f8a34c146616708cf Mon Sep 17 00:00:00 2001 From: Eliza Weisman Date: Fri, 16 Aug 2024 01:55:32 -0700 Subject: [PATCH 102/119] tests: handle ECONNREFUSED in `uds_stream::epollhup` (#6778) ## Motivation Currently, the test `uds_stream::epollhup` expects that a `UdsStream::connect` future to a Unix socket which is closed by the accept side to always fail with `io::ErrorKind::ConnectionReset`. On illumos, and potentially other systems, it instead fails with `io::ErrorKind::ConnectionRefused`. This was discovered whilst adding an illumos CI job in PR #6769. See: https://github.com/tokio-rs/tokio/pull/6769#issuecomment-2284753794 ## Solution This commit changes the test to accept either `ConenctionReset` or `ConnectionRefused`. This way, we are more tolerant of different operating systems which may decide to return slightly different errnos here. Both ECONNREFUSED and ECONNRESET seem reasonable to expect in this situation, although arguably, ECONNREFUSED is actually more correct: the acceptor did not accept the connection at all, which seems like "refusing" it to me... --- tokio/tests/uds_stream.rs | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/tokio/tests/uds_stream.rs b/tokio/tests/uds_stream.rs index b8c4e6a8eed..cb40cbd1832 100644 --- a/tokio/tests/uds_stream.rs +++ b/tokio/tests/uds_stream.rs @@ -406,6 +406,17 @@ async fn epollhup() -> io::Result<()> { drop(listener); let err = connect.await.unwrap_err(); - assert_eq!(err.kind(), io::ErrorKind::ConnectionReset); + let errno = err.kind(); + assert!( + // As far as I can tell, whether we see ECONNREFUSED or ECONNRESET here + // seems relatively inconsistent, at least on non-Linux operating + // systems. The difference in meaning between these errnos is not + // particularly well-defined, so let's just accept either. + matches!( + errno, + io::ErrorKind::ConnectionRefused | io::ErrorKind::ConnectionReset + ), + "unexpected error kind: {errno:?} (expected ConnectionRefused or ConnectionReset)" + ); Ok(()) } From 5ea3c63d7e5fef97a8e7abf329d9d00cdbc90661 Mon Sep 17 00:00:00 2001 From: Rafael Bachmann Date: Fri, 16 Aug 2024 11:31:03 +0100 Subject: [PATCH 103/119] sync: document mpsc channel allocation behavior (#6773) --- tokio/src/sync/mpsc/mod.rs | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/tokio/src/sync/mpsc/mod.rs b/tokio/src/sync/mpsc/mod.rs index 052620be1a9..e6601e90a4a 100644 --- a/tokio/src/sync/mpsc/mod.rs +++ b/tokio/src/sync/mpsc/mod.rs @@ -78,6 +78,22 @@ //! within a Tokio runtime, however it is still not tied to one specific Tokio //! runtime, and the sender may be moved from one Tokio runtime to another. //! +//! # Allocation behavior +//! +//!
The implementation details described in this section may change in future +//! Tokio releases.
+//! +//! The mpsc channel stores elements in blocks. Blocks are organized in a linked list. Sending +//! pushes new elements onto the block at the front of the list, and receiving pops them off the +//! one at the back. A block can hold 32 messages on a 64-bit target and 16 messages on a 32-bit +//! target. This number is independent of channel and message size. Each block also stores 4 +//! pointer-sized values for bookkeeping (so on a 64-bit machine, each message has 1 byte of +//! overhead). +//! +//! When all values in a block have been received, it becomes empty. It will then be freed, unless +//! the channel's first block (where newly-sent elements are being stored) has no next block. In +//! that case, the empty block is reused as the next block. +//! //! [`Sender`]: crate::sync::mpsc::Sender //! [`Receiver`]: crate::sync::mpsc::Receiver //! [bounded-send]: crate::sync::mpsc::Sender::send() From b2ea40bb543a5116109b37e1fd64713c116e4312 Mon Sep 17 00:00:00 2001 From: Motoyuki Kimura Date: Fri, 16 Aug 2024 23:50:34 +0900 Subject: [PATCH 104/119] net: add handling for abstract socket name (#6772) --- tokio/src/net/unix/listener.rs | 23 +++++++++++++++++++++-- tokio/src/net/unix/stream.rs | 23 +++++++++++++++++++++-- tokio/tests/uds_stream.rs | 13 +++++++++++++ 3 files changed, 55 insertions(+), 4 deletions(-) diff --git a/tokio/src/net/unix/listener.rs b/tokio/src/net/unix/listener.rs index 79b554ee1ab..5b28dc03f8f 100644 --- a/tokio/src/net/unix/listener.rs +++ b/tokio/src/net/unix/listener.rs @@ -3,8 +3,14 @@ use crate::net::unix::{SocketAddr, UnixStream}; use std::fmt; use std::io; +#[cfg(target_os = "android")] +use std::os::android::net::SocketAddrExt; +#[cfg(target_os = "linux")] +use std::os::linux::net::SocketAddrExt; +#[cfg(any(target_os = "linux", target_os = "android"))] +use std::os::unix::ffi::OsStrExt; use std::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, RawFd}; -use std::os::unix::net; +use std::os::unix::net::{self, SocketAddr as StdSocketAddr}; use std::path::Path; use std::task::{Context, Poll}; @@ -70,7 +76,20 @@ impl UnixListener { where P: AsRef, { - let listener = mio::net::UnixListener::bind(path)?; + // For now, we handle abstract socket paths on linux here. + #[cfg(any(target_os = "linux", target_os = "android"))] + let addr = { + let os_str_bytes = path.as_ref().as_os_str().as_bytes(); + if os_str_bytes.starts_with(b"\0") { + StdSocketAddr::from_abstract_name(os_str_bytes)? + } else { + StdSocketAddr::from_pathname(path)? + } + }; + #[cfg(not(any(target_os = "linux", target_os = "android")))] + let addr = StdSocketAddr::from_pathname(path)?; + + let listener = mio::net::UnixListener::bind_addr(&addr)?; let io = PollEvented::new(listener)?; Ok(UnixListener { io }) } diff --git a/tokio/src/net/unix/stream.rs b/tokio/src/net/unix/stream.rs index 60d58139699..a8b6479f1f8 100644 --- a/tokio/src/net/unix/stream.rs +++ b/tokio/src/net/unix/stream.rs @@ -8,8 +8,14 @@ use crate::net::unix::SocketAddr; use std::fmt; use std::io::{self, Read, Write}; use std::net::Shutdown; +#[cfg(target_os = "android")] +use std::os::android::net::SocketAddrExt; +#[cfg(target_os = "linux")] +use std::os::linux::net::SocketAddrExt; +#[cfg(any(target_os = "linux", target_os = "android"))] +use std::os::unix::ffi::OsStrExt; use std::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, RawFd}; -use std::os::unix::net; +use std::os::unix::net::{self, SocketAddr as StdSocketAddr}; use std::path::Path; use std::pin::Pin; use std::task::{Context, Poll}; @@ -66,7 +72,20 @@ impl UnixStream { where P: AsRef, { - let stream = mio::net::UnixStream::connect(path)?; + // On linux, abstract socket paths need to be considered. + #[cfg(any(target_os = "linux", target_os = "android"))] + let addr = { + let os_str_bytes = path.as_ref().as_os_str().as_bytes(); + if os_str_bytes.starts_with(b"\0") { + StdSocketAddr::from_abstract_name(os_str_bytes)? + } else { + StdSocketAddr::from_pathname(path)? + } + }; + #[cfg(not(any(target_os = "linux", target_os = "android")))] + let addr = StdSocketAddr::from_pathname(path)?; + + let stream = mio::net::UnixStream::connect_addr(&addr)?; let stream = UnixStream::new(stream)?; poll_fn(|cx| stream.io.registration().poll_write_ready(cx)).await?; diff --git a/tokio/tests/uds_stream.rs b/tokio/tests/uds_stream.rs index b8c4e6a8eed..28a836eb76f 100644 --- a/tokio/tests/uds_stream.rs +++ b/tokio/tests/uds_stream.rs @@ -409,3 +409,16 @@ async fn epollhup() -> io::Result<()> { assert_eq!(err.kind(), io::ErrorKind::ConnectionReset); Ok(()) } + +// test for https://github.com/tokio-rs/tokio/issues/6767 +#[tokio::test] +#[cfg(any(target_os = "linux", target_os = "android"))] +async fn abstract_socket_name() { + let socket_path = "\0aaa"; + let listener = UnixListener::bind(socket_path).unwrap(); + + let accept = listener.accept(); + let connect = UnixStream::connect(&socket_path); + + try_join(accept, connect).await.unwrap(); +} From 3d439ab7119daba4afaed4cc5a4d99f440adc88b Mon Sep 17 00:00:00 2001 From: Motoyuki Kimura Date: Sat, 17 Aug 2024 17:26:43 +0900 Subject: [PATCH 105/119] chore: prepare Tokio v1.39.3 (#6782) --- README.md | 2 +- tokio/CHANGELOG.md | 7 +++++++ tokio/Cargo.toml | 2 +- tokio/README.md | 2 +- 4 files changed, 10 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index 091d1d90cec..fb567dd6a23 100644 --- a/README.md +++ b/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.39.2", features = ["full"] } +tokio = { version = "1.39.3", features = ["full"] } ``` Then, on your main.rs: diff --git a/tokio/CHANGELOG.md b/tokio/CHANGELOG.md index f593cb3335c..4082b1b9392 100644 --- a/tokio/CHANGELOG.md +++ b/tokio/CHANGELOG.md @@ -1,3 +1,10 @@ +# 1.39.3 (August 17th, 2024) + +This release fixes a regression where the unix socket api stopped accepting +the abstract socket namespace. ([#6772]) + +[#6772]: https://github.com/tokio-rs/tokio/pull/6772 + # 1.39.2 (July 27th, 2024) This release fixes a regression where the `select!` macro stopped accepting diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index 12a8c698570..37dd5e7b7b8 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -6,7 +6,7 @@ name = "tokio" # - README.md # - Update CHANGELOG.md. # - Create "v1.x.y" git tag. -version = "1.39.2" +version = "1.39.3" edition = "2021" rust-version = "1.70" authors = ["Tokio Contributors "] diff --git a/tokio/README.md b/tokio/README.md index 091d1d90cec..fb567dd6a23 100644 --- a/tokio/README.md +++ b/tokio/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.39.2", features = ["full"] } +tokio = { version = "1.39.3", features = ["full"] } ``` Then, on your main.rs: From 9bd6702a3f52c71ab687170f6aeab6142d2282d0 Mon Sep 17 00:00:00 2001 From: Tobias Bucher Date: Sun, 18 Aug 2024 13:36:51 +0200 Subject: [PATCH 106/119] sync: mark mpsc types as `UnwindSafe` (#6783) --- tokio/src/loom/std/atomic_u16.rs | 3 +++ tokio/src/loom/std/atomic_u32.rs | 3 +++ tokio/src/loom/std/atomic_usize.rs | 3 +++ tokio/src/sync/mpsc/chan.rs | 3 +++ tokio/tests/async_send_sync.rs | 6 ++++++ tokio/tests/sync_mpsc.rs | 26 +++++++++++++++++++++++--- 6 files changed, 41 insertions(+), 3 deletions(-) diff --git a/tokio/src/loom/std/atomic_u16.rs b/tokio/src/loom/std/atomic_u16.rs index dfc31f642a6..32ae349c33f 100644 --- a/tokio/src/loom/std/atomic_u16.rs +++ b/tokio/src/loom/std/atomic_u16.rs @@ -1,6 +1,7 @@ use std::cell::UnsafeCell; use std::fmt; use std::ops::Deref; +use std::panic; /// `AtomicU16` providing an additional `unsync_load` function. pub(crate) struct AtomicU16 { @@ -9,6 +10,8 @@ pub(crate) struct AtomicU16 { unsafe impl Send for AtomicU16 {} unsafe impl Sync for AtomicU16 {} +impl panic::RefUnwindSafe for AtomicU16 {} +impl panic::UnwindSafe for AtomicU16 {} impl AtomicU16 { pub(crate) const fn new(val: u16) -> AtomicU16 { diff --git a/tokio/src/loom/std/atomic_u32.rs b/tokio/src/loom/std/atomic_u32.rs index 94400176911..c34ca940f8a 100644 --- a/tokio/src/loom/std/atomic_u32.rs +++ b/tokio/src/loom/std/atomic_u32.rs @@ -1,6 +1,7 @@ use std::cell::UnsafeCell; use std::fmt; use std::ops::Deref; +use std::panic; /// `AtomicU32` providing an additional `unsync_load` function. pub(crate) struct AtomicU32 { @@ -9,6 +10,8 @@ pub(crate) struct AtomicU32 { unsafe impl Send for AtomicU32 {} unsafe impl Sync for AtomicU32 {} +impl panic::RefUnwindSafe for AtomicU32 {} +impl panic::UnwindSafe for AtomicU32 {} impl AtomicU32 { pub(crate) const fn new(val: u32) -> AtomicU32 { diff --git a/tokio/src/loom/std/atomic_usize.rs b/tokio/src/loom/std/atomic_usize.rs index 64605c76dd0..f88cc4bf727 100644 --- a/tokio/src/loom/std/atomic_usize.rs +++ b/tokio/src/loom/std/atomic_usize.rs @@ -1,6 +1,7 @@ use std::cell::UnsafeCell; use std::fmt; use std::ops; +use std::panic; /// `AtomicUsize` providing an additional `unsync_load` function. pub(crate) struct AtomicUsize { @@ -9,6 +10,8 @@ pub(crate) struct AtomicUsize { unsafe impl Send for AtomicUsize {} unsafe impl Sync for AtomicUsize {} +impl panic::RefUnwindSafe for AtomicUsize {} +impl panic::UnwindSafe for AtomicUsize {} impl AtomicUsize { pub(crate) const fn new(val: usize) -> AtomicUsize { diff --git a/tokio/src/sync/mpsc/chan.rs b/tokio/src/sync/mpsc/chan.rs index 4006aa2b746..1edd2a755ae 100644 --- a/tokio/src/sync/mpsc/chan.rs +++ b/tokio/src/sync/mpsc/chan.rs @@ -9,6 +9,7 @@ use crate::sync::notify::Notify; use crate::util::cacheline::CachePadded; use std::fmt; +use std::panic; use std::process; use std::sync::atomic::Ordering::{AcqRel, Acquire, Relaxed, Release}; use std::task::Poll::{Pending, Ready}; @@ -108,6 +109,8 @@ impl fmt::Debug for RxFields { unsafe impl Send for Chan {} unsafe impl Sync for Chan {} +impl panic::RefUnwindSafe for Chan {} +impl panic::UnwindSafe for Chan {} pub(crate) fn channel(semaphore: S) -> (Tx, Rx) { let (tx, rx) = list::channel(); diff --git a/tokio/tests/async_send_sync.rs b/tokio/tests/async_send_sync.rs index 52b3835b753..0f578422bc0 100644 --- a/tokio/tests/async_send_sync.rs +++ b/tokio/tests/async_send_sync.rs @@ -413,6 +413,12 @@ assert_value!(tokio::sync::mpsc::UnboundedReceiver: Send & Sync & Unpin); assert_value!(tokio::sync::mpsc::UnboundedSender: !Send & !Sync & Unpin); assert_value!(tokio::sync::mpsc::UnboundedSender: Send & Sync & Unpin); assert_value!(tokio::sync::mpsc::UnboundedSender: Send & Sync & Unpin); +assert_value!(tokio::sync::mpsc::WeakSender: !Send & !Sync & Unpin); +assert_value!(tokio::sync::mpsc::WeakSender: Send & Sync & Unpin); +assert_value!(tokio::sync::mpsc::WeakSender: Send & Sync & Unpin); +assert_value!(tokio::sync::mpsc::WeakUnboundedSender: !Send & !Sync & Unpin); +assert_value!(tokio::sync::mpsc::WeakUnboundedSender: Send & Sync & Unpin); +assert_value!(tokio::sync::mpsc::WeakUnboundedSender: Send & Sync & Unpin); assert_value!(tokio::sync::mpsc::error::SendError: !Send & !Sync & Unpin); assert_value!(tokio::sync::mpsc::error::SendError: Send & !Sync & Unpin); assert_value!(tokio::sync::mpsc::error::SendError: Send & Sync & Unpin); diff --git a/tokio/tests/sync_mpsc.rs b/tokio/tests/sync_mpsc.rs index cc88fa79972..3d91c5cf3e8 100644 --- a/tokio/tests/sync_mpsc.rs +++ b/tokio/tests/sync_mpsc.rs @@ -11,6 +11,7 @@ use wasm_bindgen_test::wasm_bindgen_test as maybe_tokio_test; use tokio::test as maybe_tokio_test; use std::fmt; +use std::panic; use std::sync::Arc; use tokio::sync::mpsc; use tokio::sync::mpsc::error::{TryRecvError, TrySendError}; @@ -22,9 +23,28 @@ mod support { } #[allow(unused)] -trait AssertSend: Send {} -impl AssertSend for mpsc::Sender {} -impl AssertSend for mpsc::Receiver {} +trait AssertRefUnwindSafe: panic::RefUnwindSafe {} +impl AssertRefUnwindSafe for mpsc::OwnedPermit {} +impl<'a, T> AssertRefUnwindSafe for mpsc::Permit<'a, T> {} +impl<'a, T> AssertRefUnwindSafe for mpsc::PermitIterator<'a, T> {} +impl AssertRefUnwindSafe for mpsc::Receiver {} +impl AssertRefUnwindSafe for mpsc::Sender {} +impl AssertRefUnwindSafe for mpsc::UnboundedReceiver {} +impl AssertRefUnwindSafe for mpsc::UnboundedSender {} +impl AssertRefUnwindSafe for mpsc::WeakSender {} +impl AssertRefUnwindSafe for mpsc::WeakUnboundedSender {} + +#[allow(unused)] +trait AssertUnwindSafe: panic::UnwindSafe {} +impl AssertUnwindSafe for mpsc::OwnedPermit {} +impl<'a, T> AssertUnwindSafe for mpsc::Permit<'a, T> {} +impl<'a, T> AssertUnwindSafe for mpsc::PermitIterator<'a, T> {} +impl AssertUnwindSafe for mpsc::Receiver {} +impl AssertUnwindSafe for mpsc::Sender {} +impl AssertUnwindSafe for mpsc::UnboundedReceiver {} +impl AssertUnwindSafe for mpsc::UnboundedSender {} +impl AssertUnwindSafe for mpsc::WeakSender {} +impl AssertUnwindSafe for mpsc::WeakUnboundedSender {} #[maybe_tokio_test] async fn send_recv_with_buffer() { From 70569bd0090a3f64aa23c5fccc1d434e04bd90b0 Mon Sep 17 00:00:00 2001 From: dpl Date: Sun, 18 Aug 2024 15:09:19 +0200 Subject: [PATCH 107/119] task: fix typo in `TaskTracker` docs (#6792) --- tokio-util/src/task/task_tracker.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tokio-util/src/task/task_tracker.rs b/tokio-util/src/task/task_tracker.rs index d8f3bb4859a..0efff1dd162 100644 --- a/tokio-util/src/task/task_tracker.rs +++ b/tokio-util/src/task/task_tracker.rs @@ -41,7 +41,7 @@ use tokio::{ /// unique features is required: /// /// 1. When tasks exit, a `TaskTracker` will allow the task to immediately free its memory. -/// 2. By not closing the `TaskTracker`, [`wait`] will be prevented from from returning even if +/// 2. By not closing the `TaskTracker`, [`wait`] will be prevented from returning even if /// the `TaskTracker` is empty. /// 3. A `TaskTracker` does not require mutable access to insert tasks. /// 4. A `TaskTracker` can be cloned to share it with many tasks. From 5b9a290acd25d88416e70c73c49a54106fcf02b5 Mon Sep 17 00:00:00 2001 From: rosscanning Date: Mon, 19 Aug 2024 10:09:24 +1000 Subject: [PATCH 108/119] io: clarify zero remaining capacity case (#6790) --- tokio/src/io/async_read.rs | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tokio/src/io/async_read.rs b/tokio/src/io/async_read.rs index 93e5d3e66ed..ca3a435f2b8 100644 --- a/tokio/src/io/async_read.rs +++ b/tokio/src/io/async_read.rs @@ -18,7 +18,8 @@ use std::task::{Context, Poll}; /// * `Poll::Ready(Ok(()))` means that data was immediately read and placed into /// the output buffer. The amount of data read can be determined by the /// increase in the length of the slice returned by `ReadBuf::filled`. If the -/// difference is 0, EOF has been reached. +/// difference is 0, either EOF has been reached, or the output buffer had zero +/// capacity (i.e. `buf.remaining()` == 0). /// /// * `Poll::Pending` means that no data was read into the buffer /// provided. The I/O object is not currently readable but may become readable From ff3f2a8878c04141a0e3e3c0f65a74c9f31a2e11 Mon Sep 17 00:00:00 2001 From: Daniel Sedlak Date: Mon, 19 Aug 2024 15:47:57 +0200 Subject: [PATCH 109/119] io: add `SimplexStream` (#6589) --- tokio/src/io/mod.rs | 4 +- tokio/src/io/util/mem.rs | 83 +++++++++++++++++++++++++++++++++------- tokio/src/io/util/mod.rs | 2 +- 3 files changed, 72 insertions(+), 17 deletions(-) diff --git a/tokio/src/io/mod.rs b/tokio/src/io/mod.rs index b35a20dd35b..99cabde0ab8 100644 --- a/tokio/src/io/mod.rs +++ b/tokio/src/io/mod.rs @@ -271,8 +271,8 @@ cfg_io_util! { pub(crate) mod seek; pub(crate) mod util; pub use util::{ - copy, copy_bidirectional, copy_bidirectional_with_sizes, copy_buf, duplex, empty, repeat, sink, AsyncBufReadExt, AsyncReadExt, AsyncSeekExt, AsyncWriteExt, - BufReader, BufStream, BufWriter, DuplexStream, Empty, Lines, Repeat, Sink, Split, Take, + copy, copy_bidirectional, copy_bidirectional_with_sizes, copy_buf, duplex, empty, repeat, sink, simplex, AsyncBufReadExt, AsyncReadExt, AsyncSeekExt, AsyncWriteExt, + BufReader, BufStream, BufWriter, DuplexStream, Empty, Lines, Repeat, Sink, Split, Take, SimplexStream, }; } diff --git a/tokio/src/io/util/mem.rs b/tokio/src/io/util/mem.rs index 96676e64cff..15916cc0052 100644 --- a/tokio/src/io/util/mem.rs +++ b/tokio/src/io/util/mem.rs @@ -1,6 +1,6 @@ //! In-process memory IO types. -use crate::io::{AsyncRead, AsyncWrite, ReadBuf}; +use crate::io::{split, AsyncRead, AsyncWrite, ReadBuf, ReadHalf, WriteHalf}; use crate::loom::sync::Mutex; use bytes::{Buf, BytesMut}; @@ -47,15 +47,34 @@ use std::{ #[derive(Debug)] #[cfg_attr(docsrs, doc(cfg(feature = "io-util")))] pub struct DuplexStream { - read: Arc>, - write: Arc>, + read: Arc>, + write: Arc>, } -/// A unidirectional IO over a piece of memory. +/// A unidirectional pipe to read and write bytes in memory. /// -/// Data can be written to the pipe, and reading will return that data. +/// It can be constructed by [`simplex`] function which will create a pair of +/// reader and writer or by calling [`SimplexStream::new_unsplit`] that will +/// create a handle for both reading and writing. +/// +/// # Example +/// +/// ``` +/// # async fn ex() -> std::io::Result<()> { +/// # use tokio::io::{AsyncReadExt, AsyncWriteExt}; +/// let (mut receiver, mut sender) = tokio::io::simplex(64); +/// +/// sender.write_all(b"ping").await?; +/// +/// let mut buf = [0u8; 4]; +/// receiver.read_exact(&mut buf).await?; +/// assert_eq!(&buf, b"ping"); +/// # Ok(()) +/// # } +/// ``` #[derive(Debug)] -struct Pipe { +#[cfg_attr(docsrs, doc(cfg(feature = "io-util")))] +pub struct SimplexStream { /// The buffer storing the bytes written, also read from. /// /// Using a `BytesMut` because it has efficient `Buf` and `BufMut` @@ -83,8 +102,8 @@ struct Pipe { /// written to a side before the write returns `Poll::Pending`. #[cfg_attr(docsrs, doc(cfg(feature = "io-util")))] pub fn duplex(max_buf_size: usize) -> (DuplexStream, DuplexStream) { - let one = Arc::new(Mutex::new(Pipe::new(max_buf_size))); - let two = Arc::new(Mutex::new(Pipe::new(max_buf_size))); + let one = Arc::new(Mutex::new(SimplexStream::new_unsplit(max_buf_size))); + let two = Arc::new(Mutex::new(SimplexStream::new_unsplit(max_buf_size))); ( DuplexStream { @@ -161,11 +180,47 @@ impl Drop for DuplexStream { } } -// ===== impl Pipe ===== +// ===== impl SimplexStream ===== + +/// Creates unidirectional buffer that acts like in memory pipe. +/// +/// The `max_buf_size` argument is the maximum amount of bytes that can be +/// written to a buffer before the it returns `Poll::Pending`. +/// +/// # Unify reader and writer +/// +/// The reader and writer half can be unified into a single structure +/// of `SimplexStream` that supports both reading and writing or +/// the `SimplexStream` can be already created as unified structure +/// using [`SimplexStream::new_unsplit()`]. +/// +/// ``` +/// # async fn ex() -> std::io::Result<()> { +/// # use tokio::io::{AsyncReadExt, AsyncWriteExt}; +/// let (writer, reader) = tokio::io::simplex(64); +/// let mut simplex_stream = writer.unsplit(reader); +/// simplex_stream.write_all(b"hello").await?; +/// +/// let mut buf = [0u8; 5]; +/// simplex_stream.read_exact(&mut buf).await?; +/// assert_eq!(&buf, b"hello"); +/// # Ok(()) +/// # } +/// ``` +#[cfg_attr(docsrs, doc(cfg(feature = "io-util")))] +pub fn simplex(max_buf_size: usize) -> (ReadHalf, WriteHalf) { + split(SimplexStream::new_unsplit(max_buf_size)) +} -impl Pipe { - fn new(max_buf_size: usize) -> Self { - Pipe { +impl SimplexStream { + /// Creates unidirectional buffer that acts like in memory pipe. To create split + /// version with separate reader and writer you can use [`simplex`] function. + /// + /// The `max_buf_size` argument is the maximum amount of bytes that can be + /// written to a buffer before the it returns `Poll::Pending`. + #[cfg_attr(docsrs, doc(cfg(feature = "io-util")))] + pub fn new_unsplit(max_buf_size: usize) -> SimplexStream { + SimplexStream { buffer: BytesMut::new(), is_closed: false, max_buf_size, @@ -269,7 +324,7 @@ impl Pipe { } } -impl AsyncRead for Pipe { +impl AsyncRead for SimplexStream { cfg_coop! { fn poll_read( self: Pin<&mut Self>, @@ -299,7 +354,7 @@ impl AsyncRead for Pipe { } } -impl AsyncWrite for Pipe { +impl AsyncWrite for SimplexStream { cfg_coop! { fn poll_write( self: Pin<&mut Self>, diff --git a/tokio/src/io/util/mod.rs b/tokio/src/io/util/mod.rs index 5010fc01d29..b2f8618c7ee 100644 --- a/tokio/src/io/util/mod.rs +++ b/tokio/src/io/util/mod.rs @@ -42,7 +42,7 @@ cfg_io_util! { pub use lines::Lines; mod mem; - pub use mem::{duplex, DuplexStream}; + pub use mem::{duplex, simplex, DuplexStream, SimplexStream}; mod read; mod read_buf; From 1ac8dff213937088616dc84de9adc92b4b68c49a Mon Sep 17 00:00:00 2001 From: Rafael Bachmann Date: Tue, 20 Aug 2024 10:58:04 +0200 Subject: [PATCH 110/119] task: add `AbortOnDropHandle` type (#6786) --- tokio-util/src/task/abort_on_drop.rs | 63 ++++++++++++++++++++++++++++ tokio-util/src/task/mod.rs | 3 ++ tokio-util/tests/abort_on_drop.rs | 27 ++++++++++++ 3 files changed, 93 insertions(+) create mode 100644 tokio-util/src/task/abort_on_drop.rs create mode 100644 tokio-util/tests/abort_on_drop.rs diff --git a/tokio-util/src/task/abort_on_drop.rs b/tokio-util/src/task/abort_on_drop.rs new file mode 100644 index 00000000000..3739bbfa9fa --- /dev/null +++ b/tokio-util/src/task/abort_on_drop.rs @@ -0,0 +1,63 @@ +//! An [`AbortOnDropHandle`] is like a [`JoinHandle`], except that it +//! will abort the task as soon as it is dropped. + +use tokio::task::{AbortHandle, JoinError, JoinHandle}; + +use std::{ + future::Future, + pin::Pin, + task::{Context, Poll}, +}; + +/// A wrapper around a [`tokio::task::JoinHandle`], +/// which [aborts] the task when it is dropped. +/// +/// [aborts]: tokio::task::JoinHandle::abort +#[must_use = "Dropping the handle aborts the task immediately"] +#[derive(Debug)] +pub struct AbortOnDropHandle(JoinHandle); + +impl Drop for AbortOnDropHandle { + fn drop(&mut self) { + self.0.abort() + } +} + +impl AbortOnDropHandle { + /// Create an [`AbortOnDropHandle`] from a [`JoinHandle`]. + pub fn new(handle: JoinHandle) -> Self { + Self(handle) + } + + /// Abort the task associated with this handle, + /// equivalent to [`JoinHandle::abort`]. + pub fn abort(&self) { + self.0.abort() + } + + /// Checks if the task associated with this handle is finished, + /// equivalent to [`JoinHandle::is_finished`]. + pub fn is_finished(&self) -> bool { + self.0.is_finished() + } + + /// Returns a new [`AbortHandle`] that can be used to remotely abort this task, + /// equivalent to [`JoinHandle::abort_handle`]. + pub fn abort_handle(&self) -> AbortHandle { + self.0.abort_handle() + } +} + +impl Future for AbortOnDropHandle { + type Output = Result; + + fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + Pin::new(&mut self.0).poll(cx) + } +} + +impl AsRef> for AbortOnDropHandle { + fn as_ref(&self) -> &JoinHandle { + &self.0 + } +} diff --git a/tokio-util/src/task/mod.rs b/tokio-util/src/task/mod.rs index 1ab3ff13dbe..6d0c379fe20 100644 --- a/tokio-util/src/task/mod.rs +++ b/tokio-util/src/task/mod.rs @@ -11,3 +11,6 @@ pub use join_map::{JoinMap, JoinMapKeys}; pub mod task_tracker; pub use task_tracker::TaskTracker; + +mod abort_on_drop; +pub use abort_on_drop::AbortOnDropHandle; diff --git a/tokio-util/tests/abort_on_drop.rs b/tokio-util/tests/abort_on_drop.rs new file mode 100644 index 00000000000..c7dcee35aac --- /dev/null +++ b/tokio-util/tests/abort_on_drop.rs @@ -0,0 +1,27 @@ +use tokio::sync::oneshot; +use tokio_util::task::AbortOnDropHandle; + +#[tokio::test] +async fn aborts_task_on_drop() { + let (mut tx, rx) = oneshot::channel::(); + let handle = tokio::spawn(async move { + let _ = rx.await; + }); + let handle = AbortOnDropHandle::new(handle); + drop(handle); + tx.closed().await; + assert!(tx.is_closed()); +} + +#[tokio::test] +async fn aborts_task_directly() { + let (mut tx, rx) = oneshot::channel::(); + let handle = tokio::spawn(async move { + let _ = rx.await; + }); + let handle = AbortOnDropHandle::new(handle); + handle.abort(); + tx.closed().await; + assert!(tx.is_closed()); + assert!(handle.is_finished()); +} From cc70a211ad4ce71388c99e8af7480f3ddddbf602 Mon Sep 17 00:00:00 2001 From: Havish Maka <93401162+hmaka@users.noreply.github.com> Date: Mon, 26 Aug 2024 12:06:52 -0400 Subject: [PATCH 111/119] task: add `join_all` method to `JoinSet` (#6784) Adds join_all method to JoinSet. join_all consumes JoinSet and awaits the completion of all tasks on it, returning the results of the tasks in a vec. An error or panic in the task will cause join_all to panic, canceling all other tasks. Fixes: #6664 --- tokio/src/task/join_set.rs | 75 +++++++++++++++++++++++++++++++++++- tokio/tests/task_join_set.rs | 40 +++++++++++++++++++ 2 files changed, 114 insertions(+), 1 deletion(-) diff --git a/tokio/src/task/join_set.rs b/tokio/src/task/join_set.rs index 612e53addb3..a9cd8f52d55 100644 --- a/tokio/src/task/join_set.rs +++ b/tokio/src/task/join_set.rs @@ -4,10 +4,10 @@ //! of spawned tasks and allows asynchronously awaiting the output of those //! tasks as they complete. See the documentation for the [`JoinSet`] type for //! details. -use std::fmt; use std::future::Future; use std::pin::Pin; use std::task::{Context, Poll}; +use std::{fmt, panic}; use crate::runtime::Handle; #[cfg(tokio_unstable)] @@ -374,6 +374,79 @@ impl JoinSet { while self.join_next().await.is_some() {} } + /// Awaits the completion of all tasks in this `JoinSet`, returning a vector of their results. + /// + /// The results will be stored in the order they completed not the order they were spawned. + /// This is a convenience method that is equivalent to calling [`join_next`] in + /// a loop. If any tasks on the `JoinSet` fail with an [`JoinError`], then this call + /// to `join_all` will panic and all remaining tasks on the `JoinSet` are + /// cancelled. To handle errors in any other way, manually call [`join_next`] + /// in a loop. + /// + /// # Examples + /// + /// Spawn multiple tasks and `join_all` them. + /// + /// ``` + /// use tokio::task::JoinSet; + /// use std::time::Duration; + /// + /// #[tokio::main] + /// async fn main() { + /// let mut set = JoinSet::new(); + /// + /// for i in 0..3 { + /// set.spawn(async move { + /// tokio::time::sleep(Duration::from_secs(3 - i)).await; + /// i + /// }); + /// } + /// + /// let output = set.join_all().await; + /// assert_eq!(output, vec![2, 1, 0]); + /// } + /// ``` + /// + /// Equivalent implementation of `join_all`, using [`join_next`] and loop. + /// + /// ``` + /// use tokio::task::JoinSet; + /// use std::panic; + /// + /// #[tokio::main] + /// async fn main() { + /// let mut set = JoinSet::new(); + /// + /// for i in 0..3 { + /// set.spawn(async move {i}); + /// } + /// + /// let mut output = Vec::new(); + /// while let Some(res) = set.join_next().await{ + /// match res { + /// Ok(t) => output.push(t), + /// Err(err) if err.is_panic() => panic::resume_unwind(err.into_panic()), + /// Err(err) => panic!("{err}"), + /// } + /// } + /// assert_eq!(output.len(),3); + /// } + /// ``` + /// [`join_next`]: fn@Self::join_next + /// [`JoinError::id`]: fn@crate::task::JoinError::id + pub async fn join_all(mut self) -> Vec { + let mut output = Vec::with_capacity(self.len()); + + while let Some(res) = self.join_next().await { + match res { + Ok(t) => output.push(t), + Err(err) if err.is_panic() => panic::resume_unwind(err.into_panic()), + Err(err) => panic!("{err}"), + } + } + output + } + /// Aborts all tasks on this `JoinSet`. /// /// This does not remove the tasks from the `JoinSet`. To wait for the tasks to complete diff --git a/tokio/tests/task_join_set.rs b/tokio/tests/task_join_set.rs index e87135337ba..da0652627dc 100644 --- a/tokio/tests/task_join_set.rs +++ b/tokio/tests/task_join_set.rs @@ -156,6 +156,46 @@ fn runtime_gone() { .is_cancelled()); } +#[tokio::test] +async fn join_all() { + let mut set: JoinSet = JoinSet::new(); + + for _ in 0..5 { + set.spawn(async { 1 }); + } + let res: Vec = set.join_all().await; + + assert_eq!(res.len(), 5); + for itm in res.into_iter() { + assert_eq!(itm, 1) + } +} + +#[cfg(panic = "unwind")] +#[tokio::test(start_paused = true)] +async fn task_panics() { + let mut set: JoinSet<()> = JoinSet::new(); + + let (tx, mut rx) = oneshot::channel(); + assert_eq!(set.len(), 0); + + set.spawn(async move { + tokio::time::sleep(Duration::from_secs(2)).await; + tx.send(()).unwrap(); + }); + assert_eq!(set.len(), 1); + + set.spawn(async { + tokio::time::sleep(Duration::from_secs(1)).await; + panic!(); + }); + assert_eq!(set.len(), 2); + + let panic = tokio::spawn(set.join_all()).await.unwrap_err(); + assert!(rx.try_recv().is_err()); + assert!(panic.is_panic()); +} + #[tokio::test(start_paused = true)] async fn abort_all() { let mut set: JoinSet<()> = JoinSet::new(); From c9fad0846667c86d96ec151354229f2833fd9e1b Mon Sep 17 00:00:00 2001 From: Yotam Ofek Date: Tue, 27 Aug 2024 10:08:22 +0300 Subject: [PATCH 112/119] codec: fix typo in the docs for `Encoder::Error` (#6800) --- tokio-util/src/codec/encoder.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tokio-util/src/codec/encoder.rs b/tokio-util/src/codec/encoder.rs index 770a10fa9b5..4b40de4aa3a 100644 --- a/tokio-util/src/codec/encoder.rs +++ b/tokio-util/src/codec/encoder.rs @@ -9,7 +9,7 @@ pub trait Encoder { /// The type of encoding errors. /// /// [`FramedWrite`] requires `Encoder`s errors to implement `From` - /// in the interest letting it return `Error`s directly. + /// in the interest of letting it return `Error`s directly. /// /// [`FramedWrite`]: crate::codec::FramedWrite type Error: From; From b37f0de28a17ced6a9e6738062770d6fea8c5364 Mon Sep 17 00:00:00 2001 From: Noah Kennedy Date: Tue, 27 Aug 2024 08:27:58 -0500 Subject: [PATCH 113/119] runtime: implement initial set of task hooks (#6742) --- tokio/src/runtime/blocking/schedule.rs | 12 +- tokio/src/runtime/builder.rs | 106 +++++++++++++++++- tokio/src/runtime/config.rs | 8 +- tokio/src/runtime/mod.rs | 7 ++ .../runtime/scheduler/current_thread/mod.rs | 27 ++++- tokio/src/runtime/scheduler/mod.rs | 12 ++ .../runtime/scheduler/multi_thread/handle.rs | 10 ++ .../runtime/scheduler/multi_thread/worker.rs | 14 ++- .../scheduler/multi_thread_alt/handle.rs | 10 ++ .../scheduler/multi_thread_alt/worker.rs | 14 ++- tokio/src/runtime/task/core.rs | 9 +- tokio/src/runtime/task/harness.rs | 15 +++ tokio/src/runtime/task/mod.rs | 9 ++ tokio/src/runtime/task_hooks.rs | 36 ++++++ tokio/src/runtime/tests/mod.rs | 8 +- tokio/src/runtime/tests/queue.rs | 8 +- tokio/src/runtime/tests/task.rs | 10 +- tokio/src/task/local.rs | 9 +- tokio/tests/task_hooks.rs | 76 +++++++++++++ 19 files changed, 384 insertions(+), 16 deletions(-) create mode 100644 tokio/src/runtime/task_hooks.rs create mode 100644 tokio/tests/task_hooks.rs diff --git a/tokio/src/runtime/blocking/schedule.rs b/tokio/src/runtime/blocking/schedule.rs index 6c9fdf3f8e3..875bf1c314e 100644 --- a/tokio/src/runtime/blocking/schedule.rs +++ b/tokio/src/runtime/blocking/schedule.rs @@ -1,6 +1,6 @@ #[cfg(feature = "test-util")] use crate::runtime::scheduler; -use crate::runtime::task::{self, Task}; +use crate::runtime::task::{self, Task, TaskHarnessScheduleHooks}; use crate::runtime::Handle; /// `task::Schedule` implementation that does nothing (except some bookkeeping @@ -12,6 +12,7 @@ use crate::runtime::Handle; pub(crate) struct BlockingSchedule { #[cfg(feature = "test-util")] handle: Handle, + hooks: TaskHarnessScheduleHooks, } impl BlockingSchedule { @@ -32,6 +33,9 @@ impl BlockingSchedule { BlockingSchedule { #[cfg(feature = "test-util")] handle: handle.clone(), + hooks: TaskHarnessScheduleHooks { + task_terminate_callback: handle.inner.hooks().task_terminate_callback.clone(), + }, } } } @@ -57,4 +61,10 @@ impl task::Schedule for BlockingSchedule { fn schedule(&self, _task: task::Notified) { unreachable!(); } + + fn hooks(&self) -> TaskHarnessScheduleHooks { + TaskHarnessScheduleHooks { + task_terminate_callback: self.hooks.task_terminate_callback.clone(), + } + } } diff --git a/tokio/src/runtime/builder.rs b/tokio/src/runtime/builder.rs index 16be770985c..b5bf35d69b4 100644 --- a/tokio/src/runtime/builder.rs +++ b/tokio/src/runtime/builder.rs @@ -1,5 +1,9 @@ +#![cfg_attr(loom, allow(unused_imports))] + use crate::runtime::handle::Handle; -use crate::runtime::{blocking, driver, Callback, HistogramBuilder, Runtime}; +#[cfg(tokio_unstable)] +use crate::runtime::TaskMeta; +use crate::runtime::{blocking, driver, Callback, HistogramBuilder, Runtime, TaskCallback}; use crate::util::rand::{RngSeed, RngSeedGenerator}; use std::fmt; @@ -78,6 +82,12 @@ pub struct Builder { /// To run after each thread is unparked. pub(super) after_unpark: Option, + /// To run before each task is spawned. + pub(super) before_spawn: Option, + + /// To run after each task is terminated. + pub(super) after_termination: Option, + /// Customizable keep alive timeout for `BlockingPool` pub(super) keep_alive: Option, @@ -290,6 +300,9 @@ impl Builder { before_park: None, after_unpark: None, + before_spawn: None, + after_termination: None, + keep_alive: None, // Defaults for these values depend on the scheduler kind, so we get them @@ -677,6 +690,91 @@ impl Builder { self } + /// Executes function `f` just before a task is spawned. + /// + /// `f` is called within the Tokio context, so functions like + /// [`tokio::spawn`](crate::spawn) can be called, and may result in this callback being + /// invoked immediately. + /// + /// This can be used for bookkeeping or monitoring purposes. + /// + /// Note: There can only be one spawn callback for a runtime; calling this function more + /// than once replaces the last callback defined, rather than adding to it. + /// + /// This *does not* support [`LocalSet`](crate::task::LocalSet) at this time. + /// + /// # Examples + /// + /// ``` + /// # use tokio::runtime; + /// # pub fn main() { + /// let runtime = runtime::Builder::new_current_thread() + /// .on_task_spawn(|_| { + /// println!("spawning task"); + /// }) + /// .build() + /// .unwrap(); + /// + /// runtime.block_on(async { + /// tokio::task::spawn(std::future::ready(())); + /// + /// for _ in 0..64 { + /// tokio::task::yield_now().await; + /// } + /// }) + /// # } + /// ``` + #[cfg(all(not(loom), tokio_unstable))] + pub fn on_task_spawn(&mut self, f: F) -> &mut Self + where + F: Fn(&TaskMeta<'_>) + Send + Sync + 'static, + { + self.before_spawn = Some(std::sync::Arc::new(f)); + self + } + + /// Executes function `f` just after a task is terminated. + /// + /// `f` is called within the Tokio context, so functions like + /// [`tokio::spawn`](crate::spawn) can be called. + /// + /// This can be used for bookkeeping or monitoring purposes. + /// + /// Note: There can only be one task termination callback for a runtime; calling this + /// function more than once replaces the last callback defined, rather than adding to it. + /// + /// This *does not* support [`LocalSet`](crate::task::LocalSet) at this time. + /// + /// # Examples + /// + /// ``` + /// # use tokio::runtime; + /// # pub fn main() { + /// let runtime = runtime::Builder::new_current_thread() + /// .on_task_terminate(|_| { + /// println!("killing task"); + /// }) + /// .build() + /// .unwrap(); + /// + /// runtime.block_on(async { + /// tokio::task::spawn(std::future::ready(())); + /// + /// for _ in 0..64 { + /// tokio::task::yield_now().await; + /// } + /// }) + /// # } + /// ``` + #[cfg(all(not(loom), tokio_unstable))] + pub fn on_task_terminate(&mut self, f: F) -> &mut Self + where + F: Fn(&TaskMeta<'_>) + Send + Sync + 'static, + { + self.after_termination = Some(std::sync::Arc::new(f)); + self + } + /// Creates the configured `Runtime`. /// /// The returned `Runtime` instance is ready to spawn tasks. @@ -1118,6 +1216,8 @@ impl Builder { Config { before_park: self.before_park.clone(), after_unpark: self.after_unpark.clone(), + before_spawn: self.before_spawn.clone(), + after_termination: self.after_termination.clone(), global_queue_interval: self.global_queue_interval, event_interval: self.event_interval, local_queue_capacity: self.local_queue_capacity, @@ -1269,6 +1369,8 @@ cfg_rt_multi_thread! { Config { before_park: self.before_park.clone(), after_unpark: self.after_unpark.clone(), + before_spawn: self.before_spawn.clone(), + after_termination: self.after_termination.clone(), global_queue_interval: self.global_queue_interval, event_interval: self.event_interval, local_queue_capacity: self.local_queue_capacity, @@ -1316,6 +1418,8 @@ cfg_rt_multi_thread! { Config { before_park: self.before_park.clone(), after_unpark: self.after_unpark.clone(), + before_spawn: self.before_spawn.clone(), + after_termination: self.after_termination.clone(), global_queue_interval: self.global_queue_interval, event_interval: self.event_interval, local_queue_capacity: self.local_queue_capacity, diff --git a/tokio/src/runtime/config.rs b/tokio/src/runtime/config.rs index d846a0d224a..eb4bf81aa4f 100644 --- a/tokio/src/runtime/config.rs +++ b/tokio/src/runtime/config.rs @@ -2,7 +2,7 @@ any(not(all(tokio_unstable, feature = "full")), target_family = "wasm"), allow(dead_code) )] -use crate::runtime::Callback; +use crate::runtime::{Callback, TaskCallback}; use crate::util::RngSeedGenerator; pub(crate) struct Config { @@ -21,6 +21,12 @@ pub(crate) struct Config { /// Callback for a worker unparking itself pub(crate) after_unpark: Option, + /// To run before each task is spawned. + pub(crate) before_spawn: Option, + + /// To run after each task is terminated. + pub(crate) after_termination: Option, + /// The multi-threaded scheduler includes a per-worker LIFO slot used to /// store the last scheduled task. This can improve certain usage patterns, /// especially message passing between tasks. However, this LIFO slot is not diff --git a/tokio/src/runtime/mod.rs b/tokio/src/runtime/mod.rs index 38a0285b3be..b652c8fdaeb 100644 --- a/tokio/src/runtime/mod.rs +++ b/tokio/src/runtime/mod.rs @@ -379,6 +379,13 @@ cfg_rt! { pub use dump::Dump; } + mod task_hooks; + pub(crate) use task_hooks::{TaskHooks, TaskCallback}; + #[cfg(tokio_unstable)] + pub use task_hooks::TaskMeta; + #[cfg(not(tokio_unstable))] + pub(crate) use task_hooks::TaskMeta; + mod handle; pub use handle::{EnterGuard, Handle, TryCurrentError}; diff --git a/tokio/src/runtime/scheduler/current_thread/mod.rs b/tokio/src/runtime/scheduler/current_thread/mod.rs index 5c952061e72..8cf6463f06d 100644 --- a/tokio/src/runtime/scheduler/current_thread/mod.rs +++ b/tokio/src/runtime/scheduler/current_thread/mod.rs @@ -3,8 +3,12 @@ use crate::loom::sync::atomic::AtomicBool; use crate::loom::sync::Arc; use crate::runtime::driver::{self, Driver}; use crate::runtime::scheduler::{self, Defer, Inject}; -use crate::runtime::task::{self, JoinHandle, OwnedTasks, Schedule, Task}; -use crate::runtime::{blocking, context, Config, MetricsBatch, SchedulerMetrics, WorkerMetrics}; +use crate::runtime::task::{ + self, JoinHandle, OwnedTasks, Schedule, Task, TaskHarnessScheduleHooks, +}; +use crate::runtime::{ + blocking, context, Config, MetricsBatch, SchedulerMetrics, TaskHooks, TaskMeta, WorkerMetrics, +}; use crate::sync::notify::Notify; use crate::util::atomic_cell::AtomicCell; use crate::util::{waker_ref, RngSeedGenerator, Wake, WakerRef}; @@ -41,6 +45,9 @@ pub(crate) struct Handle { /// Current random number generator seed pub(crate) seed_generator: RngSeedGenerator, + + /// User-supplied hooks to invoke for things + pub(crate) task_hooks: TaskHooks, } /// Data required for executing the scheduler. The struct is passed around to @@ -131,6 +138,10 @@ impl CurrentThread { .unwrap_or(DEFAULT_GLOBAL_QUEUE_INTERVAL); let handle = Arc::new(Handle { + task_hooks: TaskHooks { + task_spawn_callback: config.before_spawn.clone(), + task_terminate_callback: config.after_termination.clone(), + }, shared: Shared { inject: Inject::new(), owned: OwnedTasks::new(1), @@ -436,6 +447,12 @@ impl Handle { { let (handle, notified) = me.shared.owned.bind(future, me.clone(), id); + me.task_hooks.spawn(&TaskMeta { + #[cfg(tokio_unstable)] + id, + _phantom: Default::default(), + }); + if let Some(notified) = notified { me.schedule(notified); } @@ -600,6 +617,12 @@ impl Schedule for Arc { }); } + fn hooks(&self) -> TaskHarnessScheduleHooks { + TaskHarnessScheduleHooks { + task_terminate_callback: self.task_hooks.task_terminate_callback.clone(), + } + } + cfg_unstable! { fn unhandled_panic(&self) { use crate::runtime::UnhandledPanic; diff --git a/tokio/src/runtime/scheduler/mod.rs b/tokio/src/runtime/scheduler/mod.rs index 29c17d16465..6052e67bb2d 100644 --- a/tokio/src/runtime/scheduler/mod.rs +++ b/tokio/src/runtime/scheduler/mod.rs @@ -7,6 +7,8 @@ cfg_rt! { pub(crate) mod inject; pub(crate) use inject::Inject; + + use crate::runtime::TaskHooks; } cfg_rt_multi_thread! { @@ -151,6 +153,16 @@ cfg_rt! { } } + pub(crate) fn hooks(&self) -> &TaskHooks { + match self { + Handle::CurrentThread(h) => &h.task_hooks, + #[cfg(feature = "rt-multi-thread")] + Handle::MultiThread(h) => &h.task_hooks, + #[cfg(all(tokio_unstable, feature = "rt-multi-thread"))] + Handle::MultiThreadAlt(h) => &h.task_hooks, + } + } + cfg_rt_multi_thread! { cfg_unstable! { pub(crate) fn expect_multi_thread_alt(&self) -> &Arc { diff --git a/tokio/src/runtime/scheduler/multi_thread/handle.rs b/tokio/src/runtime/scheduler/multi_thread/handle.rs index 72f776e47fa..029a68493a6 100644 --- a/tokio/src/runtime/scheduler/multi_thread/handle.rs +++ b/tokio/src/runtime/scheduler/multi_thread/handle.rs @@ -4,6 +4,7 @@ use crate::runtime::scheduler::multi_thread::worker; use crate::runtime::{ blocking, driver, task::{self, JoinHandle}, + TaskHooks, TaskMeta, }; use crate::util::RngSeedGenerator; @@ -28,6 +29,9 @@ pub(crate) struct Handle { /// Current random number generator seed pub(crate) seed_generator: RngSeedGenerator, + + /// User-supplied hooks to invoke for things + pub(crate) task_hooks: TaskHooks, } impl Handle { @@ -51,6 +55,12 @@ impl Handle { { let (handle, notified) = me.shared.owned.bind(future, me.clone(), id); + me.task_hooks.spawn(&TaskMeta { + #[cfg(tokio_unstable)] + id, + _phantom: Default::default(), + }); + me.schedule_option_task_without_yield(notified); handle diff --git a/tokio/src/runtime/scheduler/multi_thread/worker.rs b/tokio/src/runtime/scheduler/multi_thread/worker.rs index cefa8704bf6..9675821a0c8 100644 --- a/tokio/src/runtime/scheduler/multi_thread/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread/worker.rs @@ -58,15 +58,15 @@ use crate::loom::sync::{Arc, Mutex}; use crate::runtime; -use crate::runtime::context; use crate::runtime::scheduler::multi_thread::{ idle, queue, Counters, Handle, Idle, Overflow, Parker, Stats, TraceStatus, Unparker, }; use crate::runtime::scheduler::{inject, Defer, Lock}; -use crate::runtime::task::OwnedTasks; +use crate::runtime::task::{OwnedTasks, TaskHarnessScheduleHooks}; use crate::runtime::{ blocking, coop, driver, scheduler, task, Config, SchedulerMetrics, WorkerMetrics, }; +use crate::runtime::{context, TaskHooks}; use crate::util::atomic_cell::AtomicCell; use crate::util::rand::{FastRand, RngSeedGenerator}; @@ -284,6 +284,10 @@ pub(super) fn create( let remotes_len = remotes.len(); let handle = Arc::new(Handle { + task_hooks: TaskHooks { + task_spawn_callback: config.before_spawn.clone(), + task_terminate_callback: config.after_termination.clone(), + }, shared: Shared { remotes: remotes.into_boxed_slice(), inject, @@ -1037,6 +1041,12 @@ impl task::Schedule for Arc { self.schedule_task(task, false); } + fn hooks(&self) -> TaskHarnessScheduleHooks { + TaskHarnessScheduleHooks { + task_terminate_callback: self.task_hooks.task_terminate_callback.clone(), + } + } + fn yield_now(&self, task: Notified) { self.schedule_task(task, true); } diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/handle.rs b/tokio/src/runtime/scheduler/multi_thread_alt/handle.rs index 1f5b7818521..3b730974925 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/handle.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/handle.rs @@ -4,6 +4,7 @@ use crate::runtime::scheduler::multi_thread_alt::worker; use crate::runtime::{ blocking, driver, task::{self, JoinHandle}, + TaskHooks, TaskMeta, }; use crate::util::RngSeedGenerator; @@ -26,6 +27,9 @@ pub(crate) struct Handle { /// Current random number generator seed pub(crate) seed_generator: RngSeedGenerator, + + /// User-supplied hooks to invoke for things + pub(crate) task_hooks: TaskHooks, } impl Handle { @@ -50,6 +54,12 @@ impl Handle { { let (handle, notified) = me.shared.owned.bind(future, me.clone(), id); + me.task_hooks.spawn(&TaskMeta { + #[cfg(tokio_unstable)] + id, + _phantom: Default::default(), + }); + if let Some(notified) = notified { me.shared.schedule_task(notified, false); } diff --git a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs index b55dc317a77..d88eb5e893c 100644 --- a/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs +++ b/tokio/src/runtime/scheduler/multi_thread_alt/worker.rs @@ -58,14 +58,14 @@ use crate::loom::sync::{Arc, Condvar, Mutex, MutexGuard}; use crate::runtime; -use crate::runtime::context; use crate::runtime::driver::Driver; use crate::runtime::scheduler::multi_thread_alt::{ idle, queue, stats, Counters, Handle, Idle, Overflow, Stats, TraceStatus, }; use crate::runtime::scheduler::{self, inject, Lock}; -use crate::runtime::task::OwnedTasks; +use crate::runtime::task::{OwnedTasks, TaskHarnessScheduleHooks}; use crate::runtime::{blocking, coop, driver, task, Config, SchedulerMetrics, WorkerMetrics}; +use crate::runtime::{context, TaskHooks}; use crate::util::atomic_cell::AtomicCell; use crate::util::rand::{FastRand, RngSeedGenerator}; @@ -303,6 +303,10 @@ pub(super) fn create( let (inject, inject_synced) = inject::Shared::new(); let handle = Arc::new(Handle { + task_hooks: TaskHooks { + task_spawn_callback: config.before_spawn.clone(), + task_terminate_callback: config.after_termination.clone(), + }, shared: Shared { remotes: remotes.into_boxed_slice(), inject, @@ -1556,6 +1560,12 @@ impl task::Schedule for Arc { self.shared.schedule_task(task, false); } + fn hooks(&self) -> TaskHarnessScheduleHooks { + TaskHarnessScheduleHooks { + task_terminate_callback: self.task_hooks.task_terminate_callback.clone(), + } + } + fn yield_now(&self, task: Notified) { self.shared.schedule_task(task, true); } diff --git a/tokio/src/runtime/task/core.rs b/tokio/src/runtime/task/core.rs index 590e3fbc9d5..5d3ca0e00c9 100644 --- a/tokio/src/runtime/task/core.rs +++ b/tokio/src/runtime/task/core.rs @@ -14,7 +14,7 @@ use crate::loom::cell::UnsafeCell; use crate::runtime::context; use crate::runtime::task::raw::{self, Vtable}; use crate::runtime::task::state::State; -use crate::runtime::task::{Id, Schedule}; +use crate::runtime::task::{Id, Schedule, TaskHarnessScheduleHooks}; use crate::util::linked_list; use std::num::NonZeroU64; @@ -185,6 +185,8 @@ pub(super) struct Trailer { pub(super) owned: linked_list::Pointers
, /// Consumer task waiting on completion of this task. pub(super) waker: UnsafeCell>, + /// Optional hooks needed in the harness. + pub(super) hooks: TaskHarnessScheduleHooks, } generate_addr_of_methods! { @@ -227,6 +229,7 @@ impl Cell { let tracing_id = future.id(); let vtable = raw::vtable::(); let result = Box::new(Cell { + trailer: Trailer::new(scheduler.hooks()), header: new_header( state, vtable, @@ -240,7 +243,6 @@ impl Cell { }, task_id, }, - trailer: Trailer::new(), }); #[cfg(debug_assertions)] @@ -460,10 +462,11 @@ impl Header { } impl Trailer { - fn new() -> Self { + fn new(hooks: TaskHarnessScheduleHooks) -> Self { Trailer { waker: UnsafeCell::new(None), owned: linked_list::Pointers::new(), + hooks, } } diff --git a/tokio/src/runtime/task/harness.rs b/tokio/src/runtime/task/harness.rs index 8479becd80a..be406ff486e 100644 --- a/tokio/src/runtime/task/harness.rs +++ b/tokio/src/runtime/task/harness.rs @@ -4,6 +4,7 @@ use crate::runtime::task::state::{Snapshot, State}; use crate::runtime::task::waker::waker_ref; use crate::runtime::task::{Id, JoinError, Notified, RawTask, Schedule, Task}; +use crate::runtime::TaskMeta; use std::any::Any; use std::mem; use std::mem::ManuallyDrop; @@ -329,6 +330,20 @@ where } })); + // We catch panics here in case invoking a hook panics. + // + // We call this in a separate block so that it runs after the task appears to have + // completed and will still run if the destructor panics. + if let Some(f) = self.trailer().hooks.task_terminate_callback.as_ref() { + let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { + f(&TaskMeta { + #[cfg(tokio_unstable)] + id: self.core().task_id, + _phantom: Default::default(), + }) + })); + } + // The task has completed execution and will no longer be scheduled. let num_release = self.release(); diff --git a/tokio/src/runtime/task/mod.rs b/tokio/src/runtime/task/mod.rs index 8248fc0b591..6164bef906a 100644 --- a/tokio/src/runtime/task/mod.rs +++ b/tokio/src/runtime/task/mod.rs @@ -210,6 +210,7 @@ use crate::future::Future; use crate::util::linked_list; use crate::util::sharded_list; +use crate::runtime::TaskCallback; use std::marker::PhantomData; use std::ptr::NonNull; use std::{fmt, mem}; @@ -255,6 +256,12 @@ unsafe impl Sync for UnownedTask {} /// Task result sent back. pub(crate) type Result = std::result::Result; +/// Hooks for scheduling tasks which are needed in the task harness. +#[derive(Clone)] +pub(crate) struct TaskHarnessScheduleHooks { + pub(crate) task_terminate_callback: Option, +} + pub(crate) trait Schedule: Sync + Sized + 'static { /// The task has completed work and is ready to be released. The scheduler /// should release it immediately and return it. The task module will batch @@ -266,6 +273,8 @@ pub(crate) trait Schedule: Sync + Sized + 'static { /// Schedule the task fn schedule(&self, task: Notified); + fn hooks(&self) -> TaskHarnessScheduleHooks; + /// Schedule the task to run in the near future, yielding the thread to /// other tasks. fn yield_now(&self, task: Notified) { diff --git a/tokio/src/runtime/task_hooks.rs b/tokio/src/runtime/task_hooks.rs new file mode 100644 index 00000000000..d60a7fd64b1 --- /dev/null +++ b/tokio/src/runtime/task_hooks.rs @@ -0,0 +1,36 @@ +use std::marker::PhantomData; + +impl TaskHooks { + pub(crate) fn spawn(&self, meta: &TaskMeta<'_>) { + if let Some(f) = self.task_spawn_callback.as_ref() { + f(meta) + } + } +} + +#[derive(Clone)] +pub(crate) struct TaskHooks { + pub(crate) task_spawn_callback: Option, + pub(crate) task_terminate_callback: Option, +} + +/// Task metadata supplied to user-provided hooks for task events. +#[allow(missing_debug_implementations)] +#[cfg_attr(not(tokio_unstable), allow(unreachable_pub))] +pub struct TaskMeta<'a> { + /// The opaque ID of the task. + #[cfg(tokio_unstable)] + pub(crate) id: super::task::Id, + pub(crate) _phantom: PhantomData<&'a ()>, +} + +impl<'a> TaskMeta<'a> { + /// Return the opaque ID of the task. + #[cfg(tokio_unstable)] + pub fn id(&self) -> super::task::Id { + self.id + } +} + +/// Runs on specific task-related events +pub(crate) type TaskCallback = std::sync::Arc) + Send + Sync>; diff --git a/tokio/src/runtime/tests/mod.rs b/tokio/src/runtime/tests/mod.rs index 0ba7480cd4b..11901ebc9e5 100644 --- a/tokio/src/runtime/tests/mod.rs +++ b/tokio/src/runtime/tests/mod.rs @@ -6,7 +6,7 @@ use self::noop_scheduler::NoopSchedule; use self::unowned_wrapper::unowned; mod noop_scheduler { - use crate::runtime::task::{self, Task}; + use crate::runtime::task::{self, Task, TaskHarnessScheduleHooks}; /// `task::Schedule` implementation that does nothing, for testing. pub(crate) struct NoopSchedule; @@ -19,6 +19,12 @@ mod noop_scheduler { fn schedule(&self, _task: task::Notified) { unreachable!(); } + + fn hooks(&self) -> TaskHarnessScheduleHooks { + TaskHarnessScheduleHooks { + task_terminate_callback: None, + } + } } } diff --git a/tokio/src/runtime/tests/queue.rs b/tokio/src/runtime/tests/queue.rs index c4d4a1b8642..8a57ae428e8 100644 --- a/tokio/src/runtime/tests/queue.rs +++ b/tokio/src/runtime/tests/queue.rs @@ -1,5 +1,5 @@ use crate::runtime::scheduler::multi_thread::{queue, Stats}; -use crate::runtime::task::{self, Schedule, Task}; +use crate::runtime::task::{self, Schedule, Task, TaskHarnessScheduleHooks}; use std::cell::RefCell; use std::thread; @@ -284,4 +284,10 @@ impl Schedule for Runtime { fn schedule(&self, _task: task::Notified) { unreachable!(); } + + fn hooks(&self) -> TaskHarnessScheduleHooks { + TaskHarnessScheduleHooks { + task_terminate_callback: None, + } + } } diff --git a/tokio/src/runtime/tests/task.rs b/tokio/src/runtime/tests/task.rs index 310c69e8b2a..4035653283d 100644 --- a/tokio/src/runtime/tests/task.rs +++ b/tokio/src/runtime/tests/task.rs @@ -1,4 +1,6 @@ -use crate::runtime::task::{self, unowned, Id, JoinHandle, OwnedTasks, Schedule, Task}; +use crate::runtime::task::{ + self, unowned, Id, JoinHandle, OwnedTasks, Schedule, Task, TaskHarnessScheduleHooks, +}; use crate::runtime::tests::NoopSchedule; use std::collections::VecDeque; @@ -444,4 +446,10 @@ impl Schedule for Runtime { fn schedule(&self, task: task::Notified) { self.0.core.try_lock().unwrap().queue.push_back(task); } + + fn hooks(&self) -> TaskHarnessScheduleHooks { + TaskHarnessScheduleHooks { + task_terminate_callback: None, + } + } } diff --git a/tokio/src/task/local.rs b/tokio/src/task/local.rs index 08d89c49c03..3f3a69fc967 100644 --- a/tokio/src/task/local.rs +++ b/tokio/src/task/local.rs @@ -3,7 +3,7 @@ use crate::loom::cell::UnsafeCell; use crate::loom::sync::{Arc, Mutex}; #[cfg(tokio_unstable)] use crate::runtime; -use crate::runtime::task::{self, JoinHandle, LocalOwnedTasks, Task}; +use crate::runtime::task::{self, JoinHandle, LocalOwnedTasks, Task, TaskHarnessScheduleHooks}; use crate::runtime::{context, ThreadId, BOX_FUTURE_THRESHOLD}; use crate::sync::AtomicWaker; use crate::util::RcCell; @@ -1071,6 +1071,13 @@ impl task::Schedule for Arc { Shared::schedule(self, task); } + // localset does not currently support task hooks + fn hooks(&self) -> TaskHarnessScheduleHooks { + TaskHarnessScheduleHooks { + task_terminate_callback: None, + } + } + cfg_unstable! { fn unhandled_panic(&self) { use crate::runtime::UnhandledPanic; diff --git a/tokio/tests/task_hooks.rs b/tokio/tests/task_hooks.rs new file mode 100644 index 00000000000..1e2de7e4b4c --- /dev/null +++ b/tokio/tests/task_hooks.rs @@ -0,0 +1,76 @@ +#![allow(unknown_lints, unexpected_cfgs)] +#![warn(rust_2018_idioms)] +#![cfg(all(feature = "full", tokio_unstable, target_has_atomic = "64"))] + +use std::collections::HashSet; +use std::sync::atomic::{AtomicUsize, Ordering}; +use std::sync::{Arc, Mutex}; + +use tokio::runtime::Builder; + +const TASKS: usize = 8; +const ITERATIONS: usize = 64; +/// Assert that the spawn task hook always fires when set. +#[test] +fn spawn_task_hook_fires() { + let count = Arc::new(AtomicUsize::new(0)); + let count2 = Arc::clone(&count); + + let ids = Arc::new(Mutex::new(HashSet::new())); + let ids2 = Arc::clone(&ids); + + let runtime = Builder::new_current_thread() + .on_task_spawn(move |data| { + ids2.lock().unwrap().insert(data.id()); + + count2.fetch_add(1, Ordering::SeqCst); + }) + .build() + .unwrap(); + + for _ in 0..TASKS { + runtime.spawn(std::future::pending::<()>()); + } + + let count_realized = count.load(Ordering::SeqCst); + assert_eq!( + TASKS, count_realized, + "Total number of spawned task hook invocations was incorrect, expected {TASKS}, got {}", + count_realized + ); + + let count_ids_realized = ids.lock().unwrap().len(); + + assert_eq!( + TASKS, count_ids_realized, + "Total number of spawned task hook invocations was incorrect, expected {TASKS}, got {}", + count_realized + ); +} + +/// Assert that the terminate task hook always fires when set. +#[test] +fn terminate_task_hook_fires() { + let count = Arc::new(AtomicUsize::new(0)); + let count2 = Arc::clone(&count); + + let runtime = Builder::new_current_thread() + .on_task_terminate(move |_data| { + count2.fetch_add(1, Ordering::SeqCst); + }) + .build() + .unwrap(); + + for _ in 0..TASKS { + runtime.spawn(std::future::ready(())); + } + + runtime.block_on(async { + // tick the runtime a bunch to close out tasks + for _ in 0..ITERATIONS { + tokio::task::yield_now().await; + } + }); + + assert_eq!(TASKS, count.load(Ordering::SeqCst)); +} From 479a56a010d25f86207841ec4fcc685402addcad Mon Sep 17 00:00:00 2001 From: Timo Date: Tue, 27 Aug 2024 22:18:29 +0200 Subject: [PATCH 114/119] time: eliminate timer wheel allocations (#6779) --- tokio/src/loom/mocked.rs | 5 ++ tokio/src/loom/std/mutex.rs | 8 +++ tokio/src/runtime/time/mod.rs | 107 +++++++++++++++++++++++----------- 3 files changed, 86 insertions(+), 34 deletions(-) diff --git a/tokio/src/loom/mocked.rs b/tokio/src/loom/mocked.rs index d40e2c1f8ea..c25018e7e8c 100644 --- a/tokio/src/loom/mocked.rs +++ b/tokio/src/loom/mocked.rs @@ -24,6 +24,11 @@ pub(crate) mod sync { pub(crate) fn try_lock(&self) -> Option> { self.0.try_lock().ok() } + + #[inline] + pub(crate) fn get_mut(&mut self) -> &mut T { + self.0.get_mut().unwrap() + } } pub(crate) use loom::sync::*; diff --git a/tokio/src/loom/std/mutex.rs b/tokio/src/loom/std/mutex.rs index 7b8f9ba1e24..3ea8e1df861 100644 --- a/tokio/src/loom/std/mutex.rs +++ b/tokio/src/loom/std/mutex.rs @@ -33,4 +33,12 @@ impl Mutex { Err(TryLockError::WouldBlock) => None, } } + + #[inline] + pub(crate) fn get_mut(&mut self) -> &mut T { + match self.0.get_mut() { + Ok(val) => val, + Err(p_err) => p_err.into_inner(), + } + } } diff --git a/tokio/src/runtime/time/mod.rs b/tokio/src/runtime/time/mod.rs index c01a5f2b25e..50603ed9ef4 100644 --- a/tokio/src/runtime/time/mod.rs +++ b/tokio/src/runtime/time/mod.rs @@ -28,6 +28,7 @@ use crate::util::WakeList; use crate::loom::sync::atomic::AtomicU64; use std::fmt; +use std::sync::RwLock; use std::{num::NonZeroU64, ptr::NonNull}; struct AtomicOptionNonZeroU64(AtomicU64); @@ -115,7 +116,10 @@ struct Inner { next_wake: AtomicOptionNonZeroU64, /// Sharded Timer wheels. - wheels: Box<[Mutex]>, + wheels: RwLock, + + /// Number of entries in the sharded timer wheels. + wheels_len: u32, /// True if the driver is being shutdown. pub(super) is_shutdown: AtomicBool, @@ -130,6 +134,9 @@ struct Inner { did_wake: AtomicBool, } +/// Wrapper around the sharded timer wheels. +struct ShardedWheel(Box<[Mutex]>); + // ===== impl Driver ===== impl Driver { @@ -149,7 +156,8 @@ impl Driver { time_source, inner: Inner { next_wake: AtomicOptionNonZeroU64::new(None), - wheels: wheels.into_boxed_slice(), + wheels: RwLock::new(ShardedWheel(wheels.into_boxed_slice())), + wheels_len: shards, is_shutdown: AtomicBool::new(false), #[cfg(feature = "test-util")] did_wake: AtomicBool::new(false), @@ -190,23 +198,27 @@ impl Driver { assert!(!handle.is_shutdown()); // Finds out the min expiration time to park. - let locks = (0..rt_handle.time().inner.get_shard_size()) - .map(|id| rt_handle.time().inner.lock_sharded_wheel(id)) - .collect::>(); - - let expiration_time = locks - .iter() - .filter_map(|lock| lock.next_expiration_time()) - .min(); - - rt_handle - .time() - .inner - .next_wake - .store(next_wake_time(expiration_time)); - - // Safety: After updating the `next_wake`, we drop all the locks. - drop(locks); + let expiration_time = { + let mut wheels_lock = rt_handle + .time() + .inner + .wheels + .write() + .expect("Timer wheel shards poisoned"); + let expiration_time = wheels_lock + .0 + .iter_mut() + .filter_map(|wheel| wheel.get_mut().next_expiration_time()) + .min(); + + rt_handle + .time() + .inner + .next_wake + .store(next_wake_time(expiration_time)); + + expiration_time + }; match expiration_time { Some(when) => { @@ -312,7 +324,12 @@ impl Handle { // Returns the next wakeup time of this shard. pub(self) fn process_at_sharded_time(&self, id: u32, mut now: u64) -> Option { let mut waker_list = WakeList::new(); - let mut lock = self.inner.lock_sharded_wheel(id); + let mut wheels_lock = self + .inner + .wheels + .read() + .expect("Timer wheel shards poisoned"); + let mut lock = wheels_lock.lock_sharded_wheel(id); if now < lock.elapsed() { // Time went backwards! This normally shouldn't happen as the Rust language @@ -334,15 +351,22 @@ impl Handle { if !waker_list.can_push() { // Wake a batch of wakers. To avoid deadlock, we must do this with the lock temporarily dropped. drop(lock); + drop(wheels_lock); waker_list.wake_all(); - lock = self.inner.lock_sharded_wheel(id); + wheels_lock = self + .inner + .wheels + .read() + .expect("Timer wheel shards poisoned"); + lock = wheels_lock.lock_sharded_wheel(id); } } } let next_wake_up = lock.poll_at(); drop(lock); + drop(wheels_lock); waker_list.wake_all(); next_wake_up @@ -360,7 +384,12 @@ impl Handle { /// `add_entry` must not be called concurrently. pub(self) unsafe fn clear_entry(&self, entry: NonNull) { unsafe { - let mut lock = self.inner.lock_sharded_wheel(entry.as_ref().shard_id()); + let wheels_lock = self + .inner + .wheels + .read() + .expect("Timer wheel shards poisoned"); + let mut lock = wheels_lock.lock_sharded_wheel(entry.as_ref().shard_id()); if entry.as_ref().might_be_registered() { lock.remove(entry); @@ -383,7 +412,13 @@ impl Handle { entry: NonNull, ) { let waker = unsafe { - let mut lock = self.inner.lock_sharded_wheel(entry.as_ref().shard_id()); + let wheels_lock = self + .inner + .wheels + .read() + .expect("Timer wheel shards poisoned"); + + let mut lock = wheels_lock.lock_sharded_wheel(entry.as_ref().shard_id()); // We may have raced with a firing/deregistration, so check before // deregistering. @@ -443,16 +478,6 @@ impl Handle { // ===== impl Inner ===== impl Inner { - /// Locks the driver's sharded wheel structure. - pub(super) fn lock_sharded_wheel( - &self, - shard_id: u32, - ) -> crate::loom::sync::MutexGuard<'_, Wheel> { - let index = shard_id % (self.wheels.len() as u32); - // Safety: This modulo operation ensures that the index is not out of bounds. - unsafe { self.wheels.get_unchecked(index as usize).lock() } - } - // Check whether the driver has been shutdown pub(super) fn is_shutdown(&self) -> bool { self.is_shutdown.load(Ordering::SeqCst) @@ -460,7 +485,7 @@ impl Inner { // Gets the number of shards. fn get_shard_size(&self) -> u32 { - self.wheels.len() as u32 + self.wheels_len } } @@ -470,5 +495,19 @@ impl fmt::Debug for Inner { } } +// ===== impl ShardedWheel ===== + +impl ShardedWheel { + /// Locks the driver's sharded wheel structure. + pub(super) fn lock_sharded_wheel( + &self, + shard_id: u32, + ) -> crate::loom::sync::MutexGuard<'_, Wheel> { + let index = shard_id % (self.0.len() as u32); + // Safety: This modulo operation ensures that the index is not out of bounds. + unsafe { self.0.get_unchecked(index as usize) }.lock() + } +} + #[cfg(test)] mod tests; From 11f66f43a09169b893212b854c6c49985ff2224f Mon Sep 17 00:00:00 2001 From: Havish Maka <93401162+hmaka@users.noreply.github.com> Date: Thu, 29 Aug 2024 16:02:56 -0400 Subject: [PATCH 115/119] chore: replace `ready!` with `std::task::ready!` (#6804) --- tests-integration/tests/process_stdio.rs | 3 ++- tokio-stream/src/macros.rs | 9 --------- tokio-stream/src/stream_ext/all.rs | 4 ++-- tokio-stream/src/stream_ext/any.rs | 4 ++-- tokio-stream/src/stream_ext/chain.rs | 2 +- tokio-stream/src/stream_ext/chunks_timeout.rs | 2 +- tokio-stream/src/stream_ext/collect.rs | 2 +- tokio-stream/src/stream_ext/filter.rs | 2 +- tokio-stream/src/stream_ext/filter_map.rs | 2 +- tokio-stream/src/stream_ext/fold.rs | 2 +- tokio-stream/src/stream_ext/fuse.rs | 2 +- tokio-stream/src/stream_ext/skip.rs | 2 +- tokio-stream/src/stream_ext/skip_while.rs | 2 +- tokio-stream/src/stream_ext/throttle.rs | 2 +- tokio-stream/src/stream_ext/timeout.rs | 2 +- tokio-stream/src/stream_ext/timeout_repeating.rs | 2 +- tokio-stream/src/stream_map.rs | 2 +- tokio-stream/src/wrappers/broadcast.rs | 2 +- tokio-stream/src/wrappers/watch.rs | 2 +- tokio-test/src/io.rs | 4 ++-- tokio-test/src/stream_mock.rs | 4 ++-- tokio-util/src/codec/framed_impl.rs | 3 +-- tokio-util/src/compat.rs | 3 +-- tokio-util/src/io/inspect.rs | 3 +-- tokio-util/src/io/sink_writer.rs | 3 +-- tokio-util/src/sync/poll_semaphore.rs | 4 ++-- tokio-util/src/time/delay_queue.rs | 6 ++---- tokio-util/src/udp/frame.rs | 3 +-- tokio-util/src/util/poll_buf.rs | 3 +-- tokio/src/fs/file.rs | 3 +-- tokio/src/fs/read_dir.rs | 3 +-- tokio/src/future/maybe_done.rs | 2 +- tokio/src/io/async_fd.rs | 5 ++--- tokio/src/io/blocking.rs | 2 +- tokio/src/io/bsd/poll_aio.rs | 2 +- tokio/src/io/poll_evented.rs | 1 + tokio/src/io/seek.rs | 2 +- tokio/src/io/util/buf_reader.rs | 2 +- tokio/src/io/util/buf_writer.rs | 2 +- tokio/src/io/util/chain.rs | 2 +- tokio/src/io/util/copy.rs | 2 +- tokio/src/io/util/copy_bidirectional.rs | 2 +- tokio/src/io/util/copy_buf.rs | 2 +- tokio/src/io/util/empty.rs | 2 +- tokio/src/io/util/lines.rs | 2 +- tokio/src/io/util/mem.rs | 2 +- tokio/src/io/util/mod.rs | 2 +- tokio/src/io/util/read.rs | 2 +- tokio/src/io/util/read_buf.rs | 2 +- tokio/src/io/util/read_exact.rs | 2 +- tokio/src/io/util/read_line.rs | 2 +- tokio/src/io/util/read_to_end.rs | 2 +- tokio/src/io/util/read_to_string.rs | 2 +- tokio/src/io/util/read_until.rs | 2 +- tokio/src/io/util/repeat.rs | 2 +- tokio/src/io/util/sink.rs | 2 +- tokio/src/io/util/split.rs | 2 +- tokio/src/io/util/take.rs | 2 +- tokio/src/io/util/write_all.rs | 2 +- tokio/src/io/util/write_all_buf.rs | 2 +- tokio/src/io/util/write_buf.rs | 2 +- tokio/src/macros/mod.rs | 3 --- tokio/src/macros/ready.rs | 8 -------- tokio/src/net/addr.rs | 2 +- tokio/src/net/tcp/listener.rs | 2 +- tokio/src/net/tcp/stream.rs | 2 +- tokio/src/net/udp.rs | 2 +- tokio/src/net/unix/datagram/socket.rs | 2 +- tokio/src/net/unix/listener.rs | 2 +- tokio/src/process/mod.rs | 3 +-- tokio/src/process/unix/pidfd_reaper.rs | 2 +- tokio/src/runtime/coop.rs | 2 +- tokio/src/runtime/io/registration.rs | 2 +- tokio/src/runtime/task/join.rs | 2 +- tokio/src/runtime/tests/loom_multi_thread.rs | 2 +- tokio/src/runtime/tests/loom_multi_thread_alt.rs | 2 +- tokio/src/sync/batch_semaphore.rs | 2 +- tokio/src/sync/broadcast.rs | 2 +- tokio/src/sync/mpsc/chan.rs | 2 +- tokio/src/sync/notify.rs | 4 ++-- tokio/src/sync/oneshot.rs | 2 +- tokio/src/task/consume_budget.rs | 2 +- tokio/src/task/yield_now.rs | 2 +- tokio/src/time/interval.rs | 2 +- tokio/src/time/sleep.rs | 2 +- tokio/tests/io_copy.rs | 3 +-- 86 files changed, 92 insertions(+), 123 deletions(-) delete mode 100644 tokio/src/macros/ready.rs diff --git a/tests-integration/tests/process_stdio.rs b/tests-integration/tests/process_stdio.rs index 526fd9ca607..634099a9d39 100644 --- a/tests-integration/tests/process_stdio.rs +++ b/tests-integration/tests/process_stdio.rs @@ -10,6 +10,7 @@ use futures::future::{self, FutureExt}; use std::env; use std::io; use std::process::{ExitStatus, Stdio}; +use std::task::ready; fn cat() -> Command { let mut cmd = Command::new(env!("CARGO_BIN_EXE_test-cat")); @@ -211,7 +212,7 @@ async fn vectored_writes() { if vectored == 0 { return std::task::Poll::Ready(std::io::Result::Ok(())); } - let n = futures::ready!(Pin::new(&mut stdin).poll_write_vectored(cx, &slices))?; + let n = ready!(Pin::new(&mut stdin).poll_write_vectored(cx, &slices))?; writes_completed += 1; input.advance(n); }) diff --git a/tokio-stream/src/macros.rs b/tokio-stream/src/macros.rs index 1e3b61bac72..5aa797b4f41 100644 --- a/tokio-stream/src/macros.rs +++ b/tokio-stream/src/macros.rs @@ -57,12 +57,3 @@ macro_rules! cfg_signal { )* } } - -macro_rules! ready { - ($e:expr $(,)?) => { - match $e { - std::task::Poll::Ready(t) => t, - std::task::Poll::Pending => return std::task::Poll::Pending, - } - }; -} diff --git a/tokio-stream/src/stream_ext/all.rs b/tokio-stream/src/stream_ext/all.rs index b4dbc1e97c3..6ce00a434c1 100644 --- a/tokio-stream/src/stream_ext/all.rs +++ b/tokio-stream/src/stream_ext/all.rs @@ -3,7 +3,7 @@ use crate::Stream; use core::future::Future; use core::marker::PhantomPinned; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; pin_project! { @@ -42,7 +42,7 @@ where // Take a maximum of 32 items from the stream before yielding. for _ in 0..32 { - match futures_core::ready!(stream.as_mut().poll_next(cx)) { + match ready!(stream.as_mut().poll_next(cx)) { Some(v) => { if !(me.f)(v) { return Poll::Ready(false); diff --git a/tokio-stream/src/stream_ext/any.rs b/tokio-stream/src/stream_ext/any.rs index 31394f249b8..52deec77415 100644 --- a/tokio-stream/src/stream_ext/any.rs +++ b/tokio-stream/src/stream_ext/any.rs @@ -3,7 +3,7 @@ use crate::Stream; use core::future::Future; use core::marker::PhantomPinned; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; pin_project! { @@ -42,7 +42,7 @@ where // Take a maximum of 32 items from the stream before yielding. for _ in 0..32 { - match futures_core::ready!(stream.as_mut().poll_next(cx)) { + match ready!(stream.as_mut().poll_next(cx)) { Some(v) => { if (me.f)(v) { return Poll::Ready(true); diff --git a/tokio-stream/src/stream_ext/chain.rs b/tokio-stream/src/stream_ext/chain.rs index bd64f33ce4e..f3d360d5397 100644 --- a/tokio-stream/src/stream_ext/chain.rs +++ b/tokio-stream/src/stream_ext/chain.rs @@ -2,7 +2,7 @@ use crate::stream_ext::Fuse; use crate::Stream; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; pin_project! { diff --git a/tokio-stream/src/stream_ext/chunks_timeout.rs b/tokio-stream/src/stream_ext/chunks_timeout.rs index 48acd9328bc..89b8d49a64d 100644 --- a/tokio-stream/src/stream_ext/chunks_timeout.rs +++ b/tokio-stream/src/stream_ext/chunks_timeout.rs @@ -4,7 +4,7 @@ use tokio::time::{sleep, Sleep}; use core::future::Future; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; use std::time::Duration; diff --git a/tokio-stream/src/stream_ext/collect.rs b/tokio-stream/src/stream_ext/collect.rs index 60b94d3fd0e..eb9e2197f14 100644 --- a/tokio-stream/src/stream_ext/collect.rs +++ b/tokio-stream/src/stream_ext/collect.rs @@ -4,7 +4,7 @@ use core::future::Future; use core::marker::PhantomPinned; use core::mem; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; // Do not export this struct until `FromStream` can be unsealed. diff --git a/tokio-stream/src/stream_ext/filter.rs b/tokio-stream/src/stream_ext/filter.rs index f3dd8716b48..1d5defb195b 100644 --- a/tokio-stream/src/stream_ext/filter.rs +++ b/tokio-stream/src/stream_ext/filter.rs @@ -2,7 +2,7 @@ use crate::Stream; use core::fmt; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; pin_project! { diff --git a/tokio-stream/src/stream_ext/filter_map.rs b/tokio-stream/src/stream_ext/filter_map.rs index fe604a6f4b5..6658d71f05e 100644 --- a/tokio-stream/src/stream_ext/filter_map.rs +++ b/tokio-stream/src/stream_ext/filter_map.rs @@ -2,7 +2,7 @@ use crate::Stream; use core::fmt; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; pin_project! { diff --git a/tokio-stream/src/stream_ext/fold.rs b/tokio-stream/src/stream_ext/fold.rs index e2e97d8f375..39bace6ec6b 100644 --- a/tokio-stream/src/stream_ext/fold.rs +++ b/tokio-stream/src/stream_ext/fold.rs @@ -3,7 +3,7 @@ use crate::Stream; use core::future::Future; use core::marker::PhantomPinned; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; pin_project! { diff --git a/tokio-stream/src/stream_ext/fuse.rs b/tokio-stream/src/stream_ext/fuse.rs index 2500641d95d..9d117cf0895 100644 --- a/tokio-stream/src/stream_ext/fuse.rs +++ b/tokio-stream/src/stream_ext/fuse.rs @@ -2,7 +2,7 @@ use crate::Stream; use pin_project_lite::pin_project; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// Stream returned by [`fuse()`][super::StreamExt::fuse]. diff --git a/tokio-stream/src/stream_ext/skip.rs b/tokio-stream/src/stream_ext/skip.rs index 80a0a0aff0d..dd310b8562d 100644 --- a/tokio-stream/src/stream_ext/skip.rs +++ b/tokio-stream/src/stream_ext/skip.rs @@ -2,7 +2,7 @@ use crate::Stream; use core::fmt; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; pin_project! { diff --git a/tokio-stream/src/stream_ext/skip_while.rs b/tokio-stream/src/stream_ext/skip_while.rs index 985a92666e0..d1accd52956 100644 --- a/tokio-stream/src/stream_ext/skip_while.rs +++ b/tokio-stream/src/stream_ext/skip_while.rs @@ -2,7 +2,7 @@ use crate::Stream; use core::fmt; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; pin_project! { diff --git a/tokio-stream/src/stream_ext/throttle.rs b/tokio-stream/src/stream_ext/throttle.rs index 50001392ee7..4e71debf3ce 100644 --- a/tokio-stream/src/stream_ext/throttle.rs +++ b/tokio-stream/src/stream_ext/throttle.rs @@ -5,7 +5,7 @@ use tokio::time::{Duration, Instant, Sleep}; use std::future::Future; use std::pin::Pin; -use std::task::{self, Poll}; +use std::task::{self, ready, Poll}; use pin_project_lite::pin_project; diff --git a/tokio-stream/src/stream_ext/timeout.rs b/tokio-stream/src/stream_ext/timeout.rs index 17d1349022e..d863af1dbdb 100644 --- a/tokio-stream/src/stream_ext/timeout.rs +++ b/tokio-stream/src/stream_ext/timeout.rs @@ -4,7 +4,7 @@ use tokio::time::{Instant, Sleep}; use core::future::Future; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; use std::fmt; use std::time::Duration; diff --git a/tokio-stream/src/stream_ext/timeout_repeating.rs b/tokio-stream/src/stream_ext/timeout_repeating.rs index 253d2fd677e..4822261d870 100644 --- a/tokio-stream/src/stream_ext/timeout_repeating.rs +++ b/tokio-stream/src/stream_ext/timeout_repeating.rs @@ -3,7 +3,7 @@ use crate::{Elapsed, Stream}; use tokio::time::Interval; use core::pin::Pin; -use core::task::{Context, Poll}; +use core::task::{ready, Context, Poll}; use pin_project_lite::pin_project; pin_project! { diff --git a/tokio-stream/src/stream_map.rs b/tokio-stream/src/stream_map.rs index cefedcd7e19..2f553f91c90 100644 --- a/tokio-stream/src/stream_map.rs +++ b/tokio-stream/src/stream_map.rs @@ -3,7 +3,7 @@ use crate::{poll_fn, Stream}; use std::borrow::Borrow; use std::hash::Hash; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; /// Combine many streams into one, indexing each source stream with a unique /// key. diff --git a/tokio-stream/src/wrappers/broadcast.rs b/tokio-stream/src/wrappers/broadcast.rs index 711066466a0..21677971d5f 100644 --- a/tokio-stream/src/wrappers/broadcast.rs +++ b/tokio-stream/src/wrappers/broadcast.rs @@ -6,7 +6,7 @@ use futures_core::Stream; use tokio_util::sync::ReusableBoxFuture; use std::fmt; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; /// A wrapper around [`tokio::sync::broadcast::Receiver`] that implements [`Stream`]. /// diff --git a/tokio-stream/src/wrappers/watch.rs b/tokio-stream/src/wrappers/watch.rs index a1ea646035a..a1e4fbfa03a 100644 --- a/tokio-stream/src/wrappers/watch.rs +++ b/tokio-stream/src/wrappers/watch.rs @@ -5,7 +5,7 @@ use futures_core::Stream; use tokio_util::sync::ReusableBoxFuture; use std::fmt; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; use tokio::sync::watch::error::RecvError; /// A wrapper around [`tokio::sync::watch::Receiver`] that implements [`Stream`]. diff --git a/tokio-test/src/io.rs b/tokio-test/src/io.rs index c31d5be5de2..6f597ba2c9e 100644 --- a/tokio-test/src/io.rs +++ b/tokio-test/src/io.rs @@ -23,13 +23,13 @@ use tokio::sync::mpsc; use tokio::time::{self, Duration, Instant, Sleep}; use tokio_stream::wrappers::UnboundedReceiverStream; -use futures_core::{ready, Stream}; +use futures_core::Stream; use std::collections::VecDeque; use std::fmt; use std::future::Future; use std::pin::Pin; use std::sync::Arc; -use std::task::{self, Poll, Waker}; +use std::task::{self, ready, Poll, Waker}; use std::{cmp, io}; /// An I/O object that follows a predefined script. diff --git a/tokio-test/src/stream_mock.rs b/tokio-test/src/stream_mock.rs index a3f3c776502..1a8cf04df1b 100644 --- a/tokio-test/src/stream_mock.rs +++ b/tokio-test/src/stream_mock.rs @@ -36,10 +36,10 @@ use std::collections::VecDeque; use std::pin::Pin; -use std::task::Poll; +use std::task::{ready, Poll}; use std::time::Duration; -use futures_core::{ready, Stream}; +use futures_core::Stream; use std::future::Future; use tokio::time::{sleep_until, Instant, Sleep}; diff --git a/tokio-util/src/codec/framed_impl.rs b/tokio-util/src/codec/framed_impl.rs index e7cb691aed5..5647023ff9a 100644 --- a/tokio-util/src/codec/framed_impl.rs +++ b/tokio-util/src/codec/framed_impl.rs @@ -5,13 +5,12 @@ use futures_core::Stream; use tokio::io::{AsyncRead, AsyncWrite}; use bytes::BytesMut; -use futures_core::ready; use futures_sink::Sink; use pin_project_lite::pin_project; use std::borrow::{Borrow, BorrowMut}; use std::io; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { #[derive(Debug)] diff --git a/tokio-util/src/compat.rs b/tokio-util/src/compat.rs index 423bd956da0..b71e2b1b0f2 100644 --- a/tokio-util/src/compat.rs +++ b/tokio-util/src/compat.rs @@ -1,10 +1,9 @@ //! Compatibility between the `tokio::io` and `futures-io` versions of the //! `AsyncRead` and `AsyncWrite` traits. -use futures_core::ready; use pin_project_lite::pin_project; use std::io; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// A compatibility layer that allows conversion between the diff --git a/tokio-util/src/io/inspect.rs b/tokio-util/src/io/inspect.rs index 7604d9a3de1..48fda6170e7 100644 --- a/tokio-util/src/io/inspect.rs +++ b/tokio-util/src/io/inspect.rs @@ -1,8 +1,7 @@ -use futures_core::ready; use pin_project_lite::pin_project; use std::io::{IoSlice, Result}; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; use tokio::io::{AsyncRead, AsyncWrite, ReadBuf}; diff --git a/tokio-util/src/io/sink_writer.rs b/tokio-util/src/io/sink_writer.rs index e0789528751..134acbe807d 100644 --- a/tokio-util/src/io/sink_writer.rs +++ b/tokio-util/src/io/sink_writer.rs @@ -1,11 +1,10 @@ -use futures_core::ready; use futures_sink::Sink; use futures_core::stream::Stream; use pin_project_lite::pin_project; use std::io; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; use tokio::io::{AsyncRead, AsyncWrite}; pin_project! { diff --git a/tokio-util/src/sync/poll_semaphore.rs b/tokio-util/src/sync/poll_semaphore.rs index 4960a7c8bd0..ae23d8b73d0 100644 --- a/tokio-util/src/sync/poll_semaphore.rs +++ b/tokio-util/src/sync/poll_semaphore.rs @@ -1,8 +1,8 @@ -use futures_core::{ready, Stream}; +use futures_core::Stream; use std::fmt; use std::pin::Pin; use std::sync::Arc; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; use tokio::sync::{AcquireError, OwnedSemaphorePermit, Semaphore, TryAcquireError}; use super::ReusableBoxFuture; diff --git a/tokio-util/src/time/delay_queue.rs b/tokio-util/src/time/delay_queue.rs index 55dd311a03e..9dadc3f00ae 100644 --- a/tokio-util/src/time/delay_queue.rs +++ b/tokio-util/src/time/delay_queue.rs @@ -6,7 +6,6 @@ use crate::time::wheel::{self, Wheel}; -use futures_core::ready; use tokio::time::{sleep_until, Duration, Instant, Sleep}; use core::ops::{Index, IndexMut}; @@ -19,7 +18,7 @@ use std::fmt::Debug; use std::future::Future; use std::marker::PhantomData; use std::pin::Pin; -use std::task::{self, Poll, Waker}; +use std::task::{self, ready, Poll, Waker}; /// A queue of delayed elements. /// @@ -74,9 +73,8 @@ use std::task::{self, Poll, Waker}; /// ```rust,no_run /// use tokio_util::time::{DelayQueue, delay_queue}; /// -/// use futures::ready; /// use std::collections::HashMap; -/// use std::task::{Context, Poll}; +/// use std::task::{ready, Context, Poll}; /// use std::time::Duration; /// # type CacheKey = String; /// # type Value = String; diff --git a/tokio-util/src/udp/frame.rs b/tokio-util/src/udp/frame.rs index d094c04c6da..38e790ae980 100644 --- a/tokio-util/src/udp/frame.rs +++ b/tokio-util/src/udp/frame.rs @@ -4,10 +4,9 @@ use futures_core::Stream; use tokio::{io::ReadBuf, net::UdpSocket}; use bytes::{BufMut, BytesMut}; -use futures_core::ready; use futures_sink::Sink; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; use std::{ borrow::Borrow, net::{Ipv4Addr, SocketAddr, SocketAddrV4}, diff --git a/tokio-util/src/util/poll_buf.rs b/tokio-util/src/util/poll_buf.rs index 5a72bc4c822..0704e7478d2 100644 --- a/tokio-util/src/util/poll_buf.rs +++ b/tokio-util/src/util/poll_buf.rs @@ -1,11 +1,10 @@ use tokio::io::{AsyncRead, AsyncWrite, ReadBuf}; use bytes::{Buf, BufMut}; -use futures_core::ready; use std::io::{self, IoSlice}; use std::mem::MaybeUninit; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; /// Try to read data from an `AsyncRead` into an implementer of the [`BufMut`] trait. /// diff --git a/tokio/src/fs/file.rs b/tokio/src/fs/file.rs index 27d91debbe8..fc0a7294ce7 100644 --- a/tokio/src/fs/file.rs +++ b/tokio/src/fs/file.rs @@ -14,8 +14,7 @@ use std::io::{self, Seek, SeekFrom}; use std::path::Path; use std::pin::Pin; use std::sync::Arc; -use std::task::Context; -use std::task::Poll; +use std::task::{ready, Context, Poll}; #[cfg(test)] use super::mocks::JoinHandle; diff --git a/tokio/src/fs/read_dir.rs b/tokio/src/fs/read_dir.rs index 20d74967cd4..c144f918d01 100644 --- a/tokio/src/fs/read_dir.rs +++ b/tokio/src/fs/read_dir.rs @@ -8,8 +8,7 @@ use std::io; use std::path::{Path, PathBuf}; use std::pin::Pin; use std::sync::Arc; -use std::task::Context; -use std::task::Poll; +use std::task::{ready, Context, Poll}; #[cfg(test)] use super::mocks::spawn_blocking; diff --git a/tokio/src/future/maybe_done.rs b/tokio/src/future/maybe_done.rs index 9ae795f7a7f..ed2136526fc 100644 --- a/tokio/src/future/maybe_done.rs +++ b/tokio/src/future/maybe_done.rs @@ -3,7 +3,7 @@ use pin_project_lite::pin_project; use std::future::{Future, IntoFuture}; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// A future that may have completed. diff --git a/tokio/src/io/async_fd.rs b/tokio/src/io/async_fd.rs index 96d0518a6e5..33829367473 100644 --- a/tokio/src/io/async_fd.rs +++ b/tokio/src/io/async_fd.rs @@ -7,7 +7,7 @@ use std::error::Error; use std::fmt; use std::io; use std::os::unix::io::{AsRawFd, RawFd}; -use std::{task::Context, task::Poll}; +use std::task::{ready, Context, Poll}; /// Associates an IO object backed by a Unix file descriptor with the tokio /// reactor, allowing for readiness to be polled. The file descriptor must be of @@ -71,11 +71,10 @@ use std::{task::Context, task::Poll}; /// and using the IO traits [`AsyncRead`] and [`AsyncWrite`]. /// /// ```no_run -/// use futures::ready; /// use std::io::{self, Read, Write}; /// use std::net::TcpStream; /// use std::pin::Pin; -/// use std::task::{Context, Poll}; +/// use std::task::{ready, Context, Poll}; /// use tokio::io::{AsyncRead, AsyncWrite, ReadBuf}; /// use tokio::io::unix::AsyncFd; /// diff --git a/tokio/src/io/blocking.rs b/tokio/src/io/blocking.rs index 52aa798c4fe..f189136b52e 100644 --- a/tokio/src/io/blocking.rs +++ b/tokio/src/io/blocking.rs @@ -6,7 +6,7 @@ use std::future::Future; use std::io; use std::io::prelude::*; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; /// `T` should not implement _both_ Read and Write. #[derive(Debug)] diff --git a/tokio/src/io/bsd/poll_aio.rs b/tokio/src/io/bsd/poll_aio.rs index 708ca7484e7..086ba6d93bc 100644 --- a/tokio/src/io/bsd/poll_aio.rs +++ b/tokio/src/io/bsd/poll_aio.rs @@ -11,7 +11,7 @@ use std::io; use std::ops::{Deref, DerefMut}; use std::os::unix::io::AsRawFd; use std::os::unix::prelude::RawFd; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; /// Like [`mio::event::Source`], but for POSIX AIO only. /// diff --git a/tokio/src/io/poll_evented.rs b/tokio/src/io/poll_evented.rs index 73cb8e5809e..0e34fbe3c22 100644 --- a/tokio/src/io/poll_evented.rs +++ b/tokio/src/io/poll_evented.rs @@ -7,6 +7,7 @@ use std::fmt; use std::io; use std::ops::Deref; use std::panic::{RefUnwindSafe, UnwindSafe}; +use std::task::ready; cfg_io_driver! { /// Associates an I/O resource that implements the [`std::io::Read`] and/or diff --git a/tokio/src/io/seek.rs b/tokio/src/io/seek.rs index e64205d9cf6..f28faa85455 100644 --- a/tokio/src/io/seek.rs +++ b/tokio/src/io/seek.rs @@ -5,7 +5,7 @@ use std::future::Future; use std::io::{self, SeekFrom}; use std::marker::PhantomPinned; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// Future for the [`seek`](crate::io::AsyncSeekExt::seek) method. diff --git a/tokio/src/io/util/buf_reader.rs b/tokio/src/io/util/buf_reader.rs index d9307202c13..c89fe43dc1a 100644 --- a/tokio/src/io/util/buf_reader.rs +++ b/tokio/src/io/util/buf_reader.rs @@ -4,7 +4,7 @@ use crate::io::{AsyncBufRead, AsyncRead, AsyncSeek, AsyncWrite, ReadBuf}; use pin_project_lite::pin_project; use std::io::{self, IoSlice, SeekFrom}; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; use std::{cmp, fmt, mem}; pin_project! { diff --git a/tokio/src/io/util/buf_writer.rs b/tokio/src/io/util/buf_writer.rs index 2971a8e057a..ea9076ea693 100644 --- a/tokio/src/io/util/buf_writer.rs +++ b/tokio/src/io/util/buf_writer.rs @@ -5,7 +5,7 @@ use pin_project_lite::pin_project; use std::fmt; use std::io::{self, IoSlice, SeekFrom, Write}; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// Wraps a writer and buffers its output. diff --git a/tokio/src/io/util/chain.rs b/tokio/src/io/util/chain.rs index f96f42f4a99..9f1912771b8 100644 --- a/tokio/src/io/util/chain.rs +++ b/tokio/src/io/util/chain.rs @@ -4,7 +4,7 @@ use pin_project_lite::pin_project; use std::fmt; use std::io; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// Stream for the [`chain`](super::AsyncReadExt::chain) method. diff --git a/tokio/src/io/util/copy.rs b/tokio/src/io/util/copy.rs index 4fcec907578..87592608bed 100644 --- a/tokio/src/io/util/copy.rs +++ b/tokio/src/io/util/copy.rs @@ -3,7 +3,7 @@ use crate::io::{AsyncRead, AsyncWrite, ReadBuf}; use std::future::Future; use std::io; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; #[derive(Debug)] pub(super) struct CopyBuffer { diff --git a/tokio/src/io/util/copy_bidirectional.rs b/tokio/src/io/util/copy_bidirectional.rs index ce90141e5a5..73041953bf8 100644 --- a/tokio/src/io/util/copy_bidirectional.rs +++ b/tokio/src/io/util/copy_bidirectional.rs @@ -5,7 +5,7 @@ use crate::io::{AsyncRead, AsyncWrite}; use std::io; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; enum TransferState { Running(CopyBuffer), diff --git a/tokio/src/io/util/copy_buf.rs b/tokio/src/io/util/copy_buf.rs index c23fc9a2b4c..db622e94aae 100644 --- a/tokio/src/io/util/copy_buf.rs +++ b/tokio/src/io/util/copy_buf.rs @@ -2,7 +2,7 @@ use crate::io::{AsyncBufRead, AsyncWrite}; use std::future::Future; use std::io; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; cfg_io_util! { /// A future that asynchronously copies the entire contents of a reader into a diff --git a/tokio/src/io/util/empty.rs b/tokio/src/io/util/empty.rs index cc86e8b09a1..8821f4f2e35 100644 --- a/tokio/src/io/util/empty.rs +++ b/tokio/src/io/util/empty.rs @@ -4,7 +4,7 @@ use crate::io::{AsyncBufRead, AsyncRead, AsyncSeek, AsyncWrite, ReadBuf}; use std::fmt; use std::io::{self, SeekFrom}; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; cfg_io_util! { /// `Empty` ignores any data written via [`AsyncWrite`], and will always be empty diff --git a/tokio/src/io/util/lines.rs b/tokio/src/io/util/lines.rs index 717f633f950..3de0aeaad98 100644 --- a/tokio/src/io/util/lines.rs +++ b/tokio/src/io/util/lines.rs @@ -5,7 +5,7 @@ use pin_project_lite::pin_project; use std::io; use std::mem; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// Reads lines from an [`AsyncBufRead`]. diff --git a/tokio/src/io/util/mem.rs b/tokio/src/io/util/mem.rs index 15916cc0052..bb5ab1e39e2 100644 --- a/tokio/src/io/util/mem.rs +++ b/tokio/src/io/util/mem.rs @@ -7,7 +7,7 @@ use bytes::{Buf, BytesMut}; use std::{ pin::Pin, sync::Arc, - task::{self, Poll, Waker}, + task::{self, ready, Poll, Waker}, }; /// A bidirectional pipe to read and write bytes in memory. diff --git a/tokio/src/io/util/mod.rs b/tokio/src/io/util/mod.rs index b2f8618c7ee..44556e867ca 100644 --- a/tokio/src/io/util/mod.rs +++ b/tokio/src/io/util/mod.rs @@ -88,7 +88,7 @@ cfg_io_util! { cfg_coop! { fn poll_proceed_and_make_progress(cx: &mut std::task::Context<'_>) -> std::task::Poll<()> { - let coop = ready!(crate::runtime::coop::poll_proceed(cx)); + let coop = std::task::ready!(crate::runtime::coop::poll_proceed(cx)); coop.made_progress(); std::task::Poll::Ready(()) } diff --git a/tokio/src/io/util/read.rs b/tokio/src/io/util/read.rs index a1f9c8a0505..26e59c61fa2 100644 --- a/tokio/src/io/util/read.rs +++ b/tokio/src/io/util/read.rs @@ -6,7 +6,7 @@ use std::io; use std::marker::PhantomPinned; use std::marker::Unpin; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; /// Tries to read some bytes directly into the given `buf` in asynchronous /// manner, returning a future type. diff --git a/tokio/src/io/util/read_buf.rs b/tokio/src/io/util/read_buf.rs index 750497c9e0c..c211e042243 100644 --- a/tokio/src/io/util/read_buf.rs +++ b/tokio/src/io/util/read_buf.rs @@ -6,7 +6,7 @@ use std::future::Future; use std::io; use std::marker::PhantomPinned; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pub(crate) fn read_buf<'a, R, B>(reader: &'a mut R, buf: &'a mut B) -> ReadBuf<'a, R, B> where diff --git a/tokio/src/io/util/read_exact.rs b/tokio/src/io/util/read_exact.rs index 217315dcb91..e9e5afbf0b9 100644 --- a/tokio/src/io/util/read_exact.rs +++ b/tokio/src/io/util/read_exact.rs @@ -6,7 +6,7 @@ use std::io; use std::marker::PhantomPinned; use std::marker::Unpin; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; /// A future which can be used to easily read exactly enough bytes to fill /// a buffer. diff --git a/tokio/src/io/util/read_line.rs b/tokio/src/io/util/read_line.rs index eacc7d59602..fdcbc417e21 100644 --- a/tokio/src/io/util/read_line.rs +++ b/tokio/src/io/util/read_line.rs @@ -8,7 +8,7 @@ use std::marker::PhantomPinned; use std::mem; use std::pin::Pin; use std::string::FromUtf8Error; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// Future for the [`read_line`](crate::io::AsyncBufReadExt::read_line) method. diff --git a/tokio/src/io/util/read_to_end.rs b/tokio/src/io/util/read_to_end.rs index b56a940eb50..05665026d29 100644 --- a/tokio/src/io/util/read_to_end.rs +++ b/tokio/src/io/util/read_to_end.rs @@ -7,7 +7,7 @@ use std::io; use std::marker::PhantomPinned; use std::mem::{self, MaybeUninit}; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { #[derive(Debug)] diff --git a/tokio/src/io/util/read_to_string.rs b/tokio/src/io/util/read_to_string.rs index b3d82a26bae..18196c52502 100644 --- a/tokio/src/io/util/read_to_string.rs +++ b/tokio/src/io/util/read_to_string.rs @@ -7,7 +7,7 @@ use pin_project_lite::pin_project; use std::future::Future; use std::marker::PhantomPinned; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; use std::{io, mem}; pin_project! { diff --git a/tokio/src/io/util/read_until.rs b/tokio/src/io/util/read_until.rs index fb6fb22d9f1..fbe2609a64c 100644 --- a/tokio/src/io/util/read_until.rs +++ b/tokio/src/io/util/read_until.rs @@ -7,7 +7,7 @@ use std::io; use std::marker::PhantomPinned; use std::mem; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// Future for the [`read_until`](crate::io::AsyncBufReadExt::read_until) method. diff --git a/tokio/src/io/util/repeat.rs b/tokio/src/io/util/repeat.rs index 4a3ac78e49e..ecdbc7d062c 100644 --- a/tokio/src/io/util/repeat.rs +++ b/tokio/src/io/util/repeat.rs @@ -3,7 +3,7 @@ use crate::io::{AsyncRead, ReadBuf}; use std::io; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; cfg_io_util! { /// An async reader which yields one byte over and over and over and over and diff --git a/tokio/src/io/util/sink.rs b/tokio/src/io/util/sink.rs index 1c0102d4b2f..01a4b111cc0 100644 --- a/tokio/src/io/util/sink.rs +++ b/tokio/src/io/util/sink.rs @@ -4,7 +4,7 @@ use crate::io::AsyncWrite; use std::fmt; use std::io; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; cfg_io_util! { /// An async writer which will move data into the void. diff --git a/tokio/src/io/util/split.rs b/tokio/src/io/util/split.rs index 7489c242811..c941b04908a 100644 --- a/tokio/src/io/util/split.rs +++ b/tokio/src/io/util/split.rs @@ -5,7 +5,7 @@ use pin_project_lite::pin_project; use std::io; use std::mem; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// Splitter for the [`split`](crate::io::AsyncBufReadExt::split) method. diff --git a/tokio/src/io/util/take.rs b/tokio/src/io/util/take.rs index 0787defbe05..b49e00bfcb0 100644 --- a/tokio/src/io/util/take.rs +++ b/tokio/src/io/util/take.rs @@ -3,7 +3,7 @@ use crate::io::{AsyncBufRead, AsyncRead, ReadBuf}; use pin_project_lite::pin_project; use std::convert::TryFrom; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; use std::{cmp, io}; pin_project! { diff --git a/tokio/src/io/util/write_all.rs b/tokio/src/io/util/write_all.rs index abd3e39d310..8330d89e1fc 100644 --- a/tokio/src/io/util/write_all.rs +++ b/tokio/src/io/util/write_all.rs @@ -6,7 +6,7 @@ use std::io; use std::marker::PhantomPinned; use std::mem; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { #[derive(Debug)] diff --git a/tokio/src/io/util/write_all_buf.rs b/tokio/src/io/util/write_all_buf.rs index dd4709aa810..02054913807 100644 --- a/tokio/src/io/util/write_all_buf.rs +++ b/tokio/src/io/util/write_all_buf.rs @@ -6,7 +6,7 @@ use std::future::Future; use std::io::{self, IoSlice}; use std::marker::PhantomPinned; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// A future to write some of the buffer to an `AsyncWrite`. diff --git a/tokio/src/io/util/write_buf.rs b/tokio/src/io/util/write_buf.rs index 82fd7a759f6..879dabcb594 100644 --- a/tokio/src/io/util/write_buf.rs +++ b/tokio/src/io/util/write_buf.rs @@ -6,7 +6,7 @@ use std::future::Future; use std::io; use std::marker::PhantomPinned; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; pin_project! { /// A future to write some of the buffer to an `AsyncWrite`. diff --git a/tokio/src/macros/mod.rs b/tokio/src/macros/mod.rs index 82f42dbff35..acf3d010d69 100644 --- a/tokio/src/macros/mod.rs +++ b/tokio/src/macros/mod.rs @@ -9,9 +9,6 @@ mod loom; #[macro_use] mod pin; -#[macro_use] -mod ready; - #[macro_use] mod thread_local; diff --git a/tokio/src/macros/ready.rs b/tokio/src/macros/ready.rs deleted file mode 100644 index 1f48623b801..00000000000 --- a/tokio/src/macros/ready.rs +++ /dev/null @@ -1,8 +0,0 @@ -macro_rules! ready { - ($e:expr $(,)?) => { - match $e { - std::task::Poll::Ready(t) => t, - std::task::Poll::Pending => return std::task::Poll::Pending, - } - }; -} diff --git a/tokio/src/net/addr.rs b/tokio/src/net/addr.rs index fb8248fb3ba..a098990bb79 100644 --- a/tokio/src/net/addr.rs +++ b/tokio/src/net/addr.rs @@ -274,7 +274,7 @@ pub(crate) mod sealed { use std::option; use std::pin::Pin; - use std::task::{Context, Poll}; + use std::task::{ready,Context, Poll}; use std::vec; #[doc(hidden)] diff --git a/tokio/src/net/tcp/listener.rs b/tokio/src/net/tcp/listener.rs index 3f6592abe19..618da62b477 100644 --- a/tokio/src/net/tcp/listener.rs +++ b/tokio/src/net/tcp/listener.rs @@ -8,7 +8,7 @@ cfg_not_wasi! { use std::fmt; use std::io; use std::net::{self, SocketAddr}; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; cfg_net! { /// A TCP socket server, listening for connections. diff --git a/tokio/src/net/tcp/stream.rs b/tokio/src/net/tcp/stream.rs index e20473e5cc3..36eb84cc854 100644 --- a/tokio/src/net/tcp/stream.rs +++ b/tokio/src/net/tcp/stream.rs @@ -12,7 +12,7 @@ use std::fmt; use std::io; use std::net::{Shutdown, SocketAddr}; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; cfg_io_util! { use bytes::BufMut; diff --git a/tokio/src/net/udp.rs b/tokio/src/net/udp.rs index 03a66585047..a34f7b9225b 100644 --- a/tokio/src/net/udp.rs +++ b/tokio/src/net/udp.rs @@ -4,7 +4,7 @@ use crate::net::{to_socket_addrs, ToSocketAddrs}; use std::fmt; use std::io; use std::net::{self, Ipv4Addr, Ipv6Addr, SocketAddr}; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; cfg_io_util! { use bytes::BufMut; diff --git a/tokio/src/net/unix/datagram/socket.rs b/tokio/src/net/unix/datagram/socket.rs index d7786ca82d7..0fde57da133 100644 --- a/tokio/src/net/unix/datagram/socket.rs +++ b/tokio/src/net/unix/datagram/socket.rs @@ -7,7 +7,7 @@ use std::net::Shutdown; use std::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, RawFd}; use std::os::unix::net; use std::path::Path; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; cfg_io_util! { use bytes::BufMut; diff --git a/tokio/src/net/unix/listener.rs b/tokio/src/net/unix/listener.rs index 5b28dc03f8f..ddd9669f6d1 100644 --- a/tokio/src/net/unix/listener.rs +++ b/tokio/src/net/unix/listener.rs @@ -12,7 +12,7 @@ use std::os::unix::ffi::OsStrExt; use std::os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, RawFd}; use std::os::unix::net::{self, SocketAddr as StdSocketAddr}; use std::path::Path; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; cfg_net_unix! { /// A Unix socket which can accept connections from other Unix sockets. diff --git a/tokio/src/process/mod.rs b/tokio/src/process/mod.rs index cf1952ac189..bd4a7ecee7b 100644 --- a/tokio/src/process/mod.rs +++ b/tokio/src/process/mod.rs @@ -250,8 +250,7 @@ use std::io; use std::path::Path; use std::pin::Pin; use std::process::{Command as StdCommand, ExitStatus, Output, Stdio}; -use std::task::Context; -use std::task::Poll; +use std::task::{ready, Context, Poll}; #[cfg(unix)] use std::os::unix::process::CommandExt; diff --git a/tokio/src/process/unix/pidfd_reaper.rs b/tokio/src/process/unix/pidfd_reaper.rs index 3b7d622b34b..3c540b2b4f2 100644 --- a/tokio/src/process/unix/pidfd_reaper.rs +++ b/tokio/src/process/unix/pidfd_reaper.rs @@ -19,7 +19,7 @@ use std::{ pin::Pin, process::ExitStatus, sync::atomic::{AtomicBool, Ordering::Relaxed}, - task::{Context, Poll}, + task::{ready, Context, Poll}, }; #[derive(Debug)] diff --git a/tokio/src/runtime/coop.rs b/tokio/src/runtime/coop.rs index f2afa75c9c4..e4409ee4312 100644 --- a/tokio/src/runtime/coop.rs +++ b/tokio/src/runtime/coop.rs @@ -312,7 +312,7 @@ mod test { } let mut task = task::spawn(poll_fn(|cx| { - let coop = ready!(poll_proceed(cx)); + let coop = std::task::ready!(poll_proceed(cx)); coop.made_progress(); Poll::Ready(()) })); diff --git a/tokio/src/runtime/io/registration.rs b/tokio/src/runtime/io/registration.rs index dc5961086f7..00410a121fd 100644 --- a/tokio/src/runtime/io/registration.rs +++ b/tokio/src/runtime/io/registration.rs @@ -7,7 +7,7 @@ use crate::runtime::scheduler; use mio::event::Source; use std::io; use std::sync::Arc; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; cfg_io_driver! { /// Associates an I/O resource with the reactor instance that drives it. diff --git a/tokio/src/runtime/task/join.rs b/tokio/src/runtime/task/join.rs index 7e47e568730..aad6094b5ab 100644 --- a/tokio/src/runtime/task/join.rs +++ b/tokio/src/runtime/task/join.rs @@ -5,7 +5,7 @@ use std::future::Future; use std::marker::PhantomData; use std::panic::{RefUnwindSafe, UnwindSafe}; use std::pin::Pin; -use std::task::{Context, Poll, Waker}; +use std::task::{ready, Context, Poll, Waker}; cfg_rt! { /// An owned permission to join on a task (await its termination). diff --git a/tokio/src/runtime/tests/loom_multi_thread.rs b/tokio/src/runtime/tests/loom_multi_thread.rs index c5980c226e0..4a06b343a4d 100644 --- a/tokio/src/runtime/tests/loom_multi_thread.rs +++ b/tokio/src/runtime/tests/loom_multi_thread.rs @@ -21,7 +21,7 @@ use pin_project_lite::pin_project; use std::future::Future; use std::pin::Pin; use std::sync::atomic::Ordering::{Relaxed, SeqCst}; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; mod atomic_take { use loom::sync::atomic::AtomicBool; diff --git a/tokio/src/runtime/tests/loom_multi_thread_alt.rs b/tokio/src/runtime/tests/loom_multi_thread_alt.rs index c8d140e09e3..01b82f67fe8 100644 --- a/tokio/src/runtime/tests/loom_multi_thread_alt.rs +++ b/tokio/src/runtime/tests/loom_multi_thread_alt.rs @@ -23,7 +23,7 @@ use pin_project_lite::pin_project; use std::future::Future; use std::pin::Pin; use std::sync::atomic::Ordering::{Relaxed, SeqCst}; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; mod atomic_take { use loom::sync::atomic::AtomicBool; diff --git a/tokio/src/sync/batch_semaphore.rs b/tokio/src/sync/batch_semaphore.rs index 84f88fb390e..aabee0f5c0e 100644 --- a/tokio/src/sync/batch_semaphore.rs +++ b/tokio/src/sync/batch_semaphore.rs @@ -28,7 +28,7 @@ use std::marker::PhantomPinned; use std::pin::Pin; use std::ptr::NonNull; use std::sync::atomic::Ordering::*; -use std::task::{Context, Poll, Waker}; +use std::task::{ready, Context, Poll, Waker}; use std::{cmp, fmt}; /// An asynchronous counting semaphore which permits waiting on multiple permits at once. diff --git a/tokio/src/sync/broadcast.rs b/tokio/src/sync/broadcast.rs index ba0a44fb8b9..2161a4794ef 100644 --- a/tokio/src/sync/broadcast.rs +++ b/tokio/src/sync/broadcast.rs @@ -128,7 +128,7 @@ use std::marker::PhantomPinned; use std::pin::Pin; use std::ptr::NonNull; use std::sync::atomic::Ordering::{Acquire, Relaxed, Release, SeqCst}; -use std::task::{Context, Poll, Waker}; +use std::task::{ready, Context, Poll, Waker}; /// Sending-half of the [`broadcast`] channel. /// diff --git a/tokio/src/sync/mpsc/chan.rs b/tokio/src/sync/mpsc/chan.rs index 1edd2a755ae..f4cedf0d4dd 100644 --- a/tokio/src/sync/mpsc/chan.rs +++ b/tokio/src/sync/mpsc/chan.rs @@ -13,7 +13,7 @@ use std::panic; use std::process; use std::sync::atomic::Ordering::{AcqRel, Acquire, Relaxed, Release}; use std::task::Poll::{Pending, Ready}; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; /// Channel sender. pub(crate) struct Tx { diff --git a/tokio/src/sync/notify.rs b/tokio/src/sync/notify.rs index 5d344f70411..d76ff922152 100644 --- a/tokio/src/sync/notify.rs +++ b/tokio/src/sync/notify.rs @@ -1041,7 +1041,7 @@ impl Notified<'_> { #[cfg(tokio_taskdump)] if let Some(waker) = waker { let mut ctx = Context::from_waker(waker); - ready!(crate::trace::trace_leaf(&mut ctx)); + std::task::ready!(crate::trace::trace_leaf(&mut ctx)); } if waiter.notification.load(Acquire).is_some() { @@ -1135,7 +1135,7 @@ impl Notified<'_> { #[cfg(tokio_taskdump)] if let Some(waker) = waker { let mut ctx = Context::from_waker(waker); - ready!(crate::trace::trace_leaf(&mut ctx)); + std::task::ready!(crate::trace::trace_leaf(&mut ctx)); } return Poll::Ready(()); } diff --git a/tokio/src/sync/oneshot.rs b/tokio/src/sync/oneshot.rs index ab29b3e3edd..151b9c85c83 100644 --- a/tokio/src/sync/oneshot.rs +++ b/tokio/src/sync/oneshot.rs @@ -135,7 +135,7 @@ use std::mem::MaybeUninit; use std::pin::Pin; use std::sync::atomic::Ordering::{self, AcqRel, Acquire}; use std::task::Poll::{Pending, Ready}; -use std::task::{Context, Poll, Waker}; +use std::task::{ready, Context, Poll, Waker}; /// Sends a value to the associated [`Receiver`]. /// diff --git a/tokio/src/task/consume_budget.rs b/tokio/src/task/consume_budget.rs index 1e398d73b2a..988555b28c6 100644 --- a/tokio/src/task/consume_budget.rs +++ b/tokio/src/task/consume_budget.rs @@ -1,4 +1,4 @@ -use std::task::Poll; +use std::task::{ready, Poll}; /// Consumes a unit of budget and returns the execution back to the Tokio /// runtime *if* the task's coop budget was exhausted. diff --git a/tokio/src/task/yield_now.rs b/tokio/src/task/yield_now.rs index 70a5de53dea..27c1479671f 100644 --- a/tokio/src/task/yield_now.rs +++ b/tokio/src/task/yield_now.rs @@ -2,7 +2,7 @@ use crate::runtime::context; use std::future::Future; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; /// Yields execution back to the Tokio runtime. /// diff --git a/tokio/src/time/interval.rs b/tokio/src/time/interval.rs index 2b5246acfa4..a13030d36a4 100644 --- a/tokio/src/time/interval.rs +++ b/tokio/src/time/interval.rs @@ -5,7 +5,7 @@ use crate::util::trace; use std::future::Future; use std::panic::Location; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; /// Creates new [`Interval`] that yields with interval of `period`. The first /// tick completes immediately. The default [`MissedTickBehavior`] is diff --git a/tokio/src/time/sleep.rs b/tokio/src/time/sleep.rs index d5a68f09554..7e393d0d17a 100644 --- a/tokio/src/time/sleep.rs +++ b/tokio/src/time/sleep.rs @@ -6,7 +6,7 @@ use pin_project_lite::pin_project; use std::future::Future; use std::panic::Location; use std::pin::Pin; -use std::task::{self, Poll}; +use std::task::{self, ready, Poll}; /// Waits until `deadline` is reached. /// diff --git a/tokio/tests/io_copy.rs b/tokio/tests/io_copy.rs index 82d92a9688b..3bde8e7fa69 100644 --- a/tokio/tests/io_copy.rs +++ b/tokio/tests/io_copy.rs @@ -2,12 +2,11 @@ #![cfg(feature = "full")] use bytes::BytesMut; -use futures::ready; use tokio::io::{self, AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt, ReadBuf}; use tokio_test::assert_ok; use std::pin::Pin; -use std::task::{Context, Poll}; +use std::task::{ready, Context, Poll}; #[tokio::test] async fn copy() { From ea6d652a102dee3f22b490db70545b7f66a23fb7 Mon Sep 17 00:00:00 2001 From: Motoyuki Kimura Date: Fri, 30 Aug 2024 17:03:16 +0900 Subject: [PATCH 116/119] chore: prepare Tokio v1.40.0 (#6806) --- README.md | 2 +- tokio/CHANGELOG.md | 49 ++++++++++++++++++++++++++++++++++++++++++++++ tokio/Cargo.toml | 2 +- tokio/README.md | 2 +- 4 files changed, 52 insertions(+), 3 deletions(-) diff --git a/README.md b/README.md index fb567dd6a23..6fe5b34ef82 100644 --- a/README.md +++ b/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.39.3", features = ["full"] } +tokio = { version = "1.40.0", features = ["full"] } ``` Then, on your main.rs: diff --git a/tokio/CHANGELOG.md b/tokio/CHANGELOG.md index 4082b1b9392..bddb5c421b6 100644 --- a/tokio/CHANGELOG.md +++ b/tokio/CHANGELOG.md @@ -1,3 +1,52 @@ +# 1.40.0 (August 30th, 2024) + +### Added + +- io: add `util::SimplexStream` ([#6589]) +- process: stabilize `Command::process_group` ([#6731]) +- sync: add `{TrySendError,SendTimeoutError}::into_inner` ([#6755]) +- task: add `JoinSet::join_all` ([#6784]) + +### Added (unstable) + +- runtime: add `Builder::{on_task_spawn, on_task_terminate}` ([#6742]) + +### Changed + +- io: use vectored io for `write_all_buf` when possible ([#6724]) +- runtime: prevent niche-optimization to avoid triggering miri ([#6744]) +- sync: mark mpsc types as `UnwindSafe` ([#6783]) +- sync,time: make `Sleep` and `BatchSemaphore` instrumentation explicit roots ([#6727]) +- task: use `NonZeroU64` for `task::Id` ([#6733]) +- task: include panic message when printing `JoinError` ([#6753]) +- task: add `#[must_use]` to `JoinHandle::abort_handle` ([#6762]) +- time: eliminate timer wheel allocations ([#6779]) + +### Documented + +- docs: clarify that `[build]` section doesn't go in Cargo.toml ([#6728]) +- io: clarify zero remaining capacity case ([#6790]) +- macros: improve documentation for `select!` ([#6774]) +- sync: document mpsc channel allocation behavior ([#6773]) + +[#6589]: https://github.com/tokio-rs/tokio/pull/6589 +[#6724]: https://github.com/tokio-rs/tokio/pull/6724 +[#6727]: https://github.com/tokio-rs/tokio/pull/6727 +[#6728]: https://github.com/tokio-rs/tokio/pull/6728 +[#6731]: https://github.com/tokio-rs/tokio/pull/6731 +[#6733]: https://github.com/tokio-rs/tokio/pull/6733 +[#6742]: https://github.com/tokio-rs/tokio/pull/6742 +[#6744]: https://github.com/tokio-rs/tokio/pull/6744 +[#6753]: https://github.com/tokio-rs/tokio/pull/6753 +[#6755]: https://github.com/tokio-rs/tokio/pull/6755 +[#6762]: https://github.com/tokio-rs/tokio/pull/6762 +[#6773]: https://github.com/tokio-rs/tokio/pull/6773 +[#6774]: https://github.com/tokio-rs/tokio/pull/6774 +[#6779]: https://github.com/tokio-rs/tokio/pull/6779 +[#6783]: https://github.com/tokio-rs/tokio/pull/6783 +[#6784]: https://github.com/tokio-rs/tokio/pull/6784 +[#6790]: https://github.com/tokio-rs/tokio/pull/6790 + # 1.39.3 (August 17th, 2024) This release fixes a regression where the unix socket api stopped accepting diff --git a/tokio/Cargo.toml b/tokio/Cargo.toml index 37dd5e7b7b8..4c5f7d46acb 100644 --- a/tokio/Cargo.toml +++ b/tokio/Cargo.toml @@ -6,7 +6,7 @@ name = "tokio" # - README.md # - Update CHANGELOG.md. # - Create "v1.x.y" git tag. -version = "1.39.3" +version = "1.40.0" edition = "2021" rust-version = "1.70" authors = ["Tokio Contributors "] diff --git a/tokio/README.md b/tokio/README.md index fb567dd6a23..6fe5b34ef82 100644 --- a/tokio/README.md +++ b/tokio/README.md @@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml: ```toml [dependencies] -tokio = { version = "1.39.3", features = ["full"] } +tokio = { version = "1.40.0", features = ["full"] } ``` Then, on your main.rs: From 27539ae3bdfd08b7503f4919fe13299537cc16fc Mon Sep 17 00:00:00 2001 From: Antonio de la Vega Date: Sat, 31 Aug 2024 12:34:22 -0700 Subject: [PATCH 117/119] runtime: fix race in yield_defers_until_park test (#6809) --- tokio/tests/rt_common.rs | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/tokio/tests/rt_common.rs b/tokio/tests/rt_common.rs index 75a20057166..2c4fc9e0c94 100644 --- a/tokio/tests/rt_common.rs +++ b/tokio/tests/rt_common.rs @@ -785,9 +785,9 @@ rt_test! { barrier.wait(); let (fail_test, fail_test_recv) = oneshot::channel::<()>(); - + let flag_clone = flag.clone(); let jh = tokio::spawn(async move { - // Create a TCP litener + // Create a TCP listener let listener = TcpListener::bind("127.0.0.1:0").await.unwrap(); let addr = listener.local_addr().unwrap(); @@ -798,7 +798,7 @@ rt_test! { // Yield until connected let mut cnt = 0; - while !flag.load(SeqCst){ + while !flag_clone.load(SeqCst){ tokio::task::yield_now().await; cnt += 1; @@ -814,7 +814,7 @@ rt_test! { }, async { let _ = listener.accept().await.unwrap(); - flag.store(true, SeqCst); + flag_clone.store(true, SeqCst); } ); }); @@ -824,6 +824,11 @@ rt_test! { let success = fail_test_recv.await.is_err(); if success { + // Setting flag to true ensures that the tasks we spawned at + // the beginning of the test will exit. + // If we don't do this, the test will hang since the runtime waits + // for all spawned tasks to finish when dropping. + flag.store(true, SeqCst); // Check for panics in spawned task. jh.abort(); jh.await.unwrap(); From 1166ecc2accc1a4bab47612858e7166617d15cfe Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Sarek=20H=C3=B8verstad=20Skot=C3=A5m?= <44001885+sarsko@users.noreply.github.com> Date: Tue, 3 Sep 2024 13:34:20 -0700 Subject: [PATCH 118/119] config: enable full for tokio-util in the playground (#6818) --- tokio-util/Cargo.toml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tokio-util/Cargo.toml b/tokio-util/Cargo.toml index 23a577a37fe..19a33c9e083 100644 --- a/tokio-util/Cargo.toml +++ b/tokio-util/Cargo.toml @@ -65,3 +65,6 @@ rustdoc-args = ["--cfg", "docsrs", "--cfg", "tokio_unstable"] # it's necessary to _also_ pass `--cfg tokio_unstable` to rustc, or else # dependencies will not be enabled, and the docs build will fail. rustc-args = ["--cfg", "docsrs", "--cfg", "tokio_unstable"] + +[package.metadata.playground] +features = ["full"] From 35f244ad096b5331a38edd5a8f0beb436104873e Mon Sep 17 00:00:00 2001 From: Timo Date: Thu, 5 Sep 2024 00:22:11 +0200 Subject: [PATCH 119/119] chore: prepare tokio-util v0.7.12 (#6823) --- tokio-util/CHANGELOG.md | 24 ++++++++++++++++++++++++ tokio-util/Cargo.toml | 2 +- 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/tokio-util/CHANGELOG.md b/tokio-util/CHANGELOG.md index 729c0352df6..db589136bab 100644 --- a/tokio-util/CHANGELOG.md +++ b/tokio-util/CHANGELOG.md @@ -1,3 +1,27 @@ +# 0.7.12 (September 5th, 2024) + +This release bumps the MSRV to 1.70. ([#6645]) + +### Added +- sync: Add `run_until_cancelled` to `tokio_util::sync::CancellationToken` ([#6618]) +- task: add `AbortOnDropHandle` type ([#6786]) + +### Changed +- deps: no default features for hashbrown ([#6541]) +- time: wake `DelayQueue` when removing last item ([#6752]) +- deps: enable the full feature when compiled for the playground ([#6818]) + +### Documented +- task: fix typo in `TaskTracker` docs ([#6792]) + +[#6645]: https://github.com/tokio-rs/tokio/pull/6645 +[#6541]: https://github.com/tokio-rs/tokio/pull/6541 +[#6618]: https://github.com/tokio-rs/tokio/pull/6618 +[#6752]: https://github.com/tokio-rs/tokio/pull/6752 +[#6786]: https://github.com/tokio-rs/tokio/pull/6786 +[#6792]: https://github.com/tokio-rs/tokio/pull/6792 +[#6818]: https://github.com/tokio-rs/tokio/pull/6818 + # 0.7.11 (May 4th, 2024) This release updates the MSRV to 1.63. ([#6126]) diff --git a/tokio-util/Cargo.toml b/tokio-util/Cargo.toml index 19a33c9e083..a73eec8799a 100644 --- a/tokio-util/Cargo.toml +++ b/tokio-util/Cargo.toml @@ -4,7 +4,7 @@ name = "tokio-util" # - Remove path dependencies # - Update CHANGELOG.md. # - Create "tokio-util-0.7.x" git tag. -version = "0.7.11" +version = "0.7.12" edition = "2021" rust-version = "1.70" authors = ["Tokio Contributors "]