Netto

Netto is an eBPF-based network monitoring tool for Linux that measures the CPU cost of the Linux network stack.

Features

• Measurement of the on-CPU time of the main networking entry points in kernel
• Breakdown of the NET_RX_SOFTIRQ entry point into the basic network functions by stack trace-based profiling of the kernel
• Low overhead
• Real time operation
• Minimum Linux version supported: 5.11 (BPF_MAP_TYPE_TASK_STORAGE)

Compilation

To compile the tool you'll need:

• Latest Rust toolchain (stable or nightly)
• wasm_pack (for the web frontend)

Compile and run with:

cargo xtask run [--release]

Usage

Netto exposes the real time results as a Wasm-powered web page accessible on http://localhost:8080

Repository structure

Folder	Contents
images	Images used on this README
main	Main Rust binary crate
main/src/bpf	BPF-C programs
metrics-common	Bridge Rust library crate for main and web-frontend
web-frontend	Rust WebAssembly frontend
www	Static files for the web frontend
xtask	Utility binary crate for managing coordination between the other crates