Merge branch 'branch-0.19' into benchmark-strings-datetime

cpp/benchmarks/CMakeLists.txt

@@ -180,6 +180,7 @@ ConfigureBench(SUBWORD_TOKENIZER_BENCH text/subword_benchmark.cpp)
 # - strings benchmark -------------------------------------------------------------------
 ConfigureBench(STRINGS_BENCH
   string/case_benchmark.cpp
+  string/combine_benchmark.cpp
   string/contains_benchmark.cpp
   string/convert_datetime_benchmark.cpp
   string/convert_durations_benchmark.cpp

cpp/benchmarks/string/combine_benchmark.cpp

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2021, NVIDIA CORPORATION.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "string_bench_args.hpp"
+
+#include <benchmark/benchmark.h>
+#include <benchmarks/common/generate_benchmark_input.hpp>
+#include <benchmarks/fixture/benchmark_fixture.hpp>
+#include <benchmarks/synchronization/synchronization.hpp>
+
+#include <cudf/scalar/scalar.hpp>
+#include <cudf/strings/combine.hpp>
+#include <cudf/strings/strings_column_view.hpp>
+#include <cudf_test/column_wrapper.hpp>
+
+class StringCombine : public cudf::benchmark {
+};
+
+static void BM_combine(benchmark::State& state)
+{
+  cudf::size_type const n_rows{static_cast<cudf::size_type>(state.range(0))};
+  cudf::size_type const max_str_length{static_cast<cudf::size_type>(state.range(1))};
+  data_profile table_profile;
+  table_profile.set_distribution_params(
+    cudf::type_id::STRING, distribution_id::NORMAL, 0, max_str_length);
+  auto const table =
+    create_random_table({cudf::type_id::STRING}, 2, row_count{n_rows}, table_profile);
+  cudf::strings_column_view input1(table->view().column(0));
+  cudf::strings_column_view input2(table->view().column(1));
+  cudf::string_scalar separator("+");
+
+  for (auto _ : state) {
+    cuda_event_timer raii(state, true, 0);
+    cudf::strings::concatenate(table->view(), separator);
+  }
+
+  state.SetBytesProcessed(state.iterations() * (input1.chars_size() + input2.chars_size()));
+}
+
+static void generate_bench_args(benchmark::internal::Benchmark* b)
+{
+  int const min_rows   = 1 << 12;
+  int const max_rows   = 1 << 24;
+  int const row_mult   = 8;
+  int const min_rowlen = 1 << 4;
+  int const max_rowlen = 1 << 11;
+  int const len_mult   = 4;
+  generate_string_bench_args(b, min_rows, max_rows, row_mult, min_rowlen, max_rowlen, len_mult);
+}
+
+#define STRINGS_BENCHMARK_DEFINE(name)          \
+  BENCHMARK_DEFINE_F(StringCombine, name)       \
+  (::benchmark::State & st) { BM_combine(st); } \
+  BENCHMARK_REGISTER_F(StringCombine, name)     \
+    ->Apply(generate_bench_args)                \
+    ->UseManualTime()                           \
+    ->Unit(benchmark::kMillisecond);
+
+STRINGS_BENCHMARK_DEFINE(concat)

cpp/benchmarks/string/string_bench_args.hpp

@@ -19,6 +19,8 @@
 
 #include <cudf/types.hpp>
 
+#include <limits>
+
 /**
  * @brief Generate row count and row length argument ranges for a string benchmark.
  *