84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
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// Copyright 2021 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <limits>
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#include "absl/synchronization/blocking_counter.h"
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#include "absl/synchronization/internal/thread_pool.h"
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#include "benchmark/benchmark.h"
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namespace {
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void BM_BlockingCounter_SingleThread(benchmark::State& state) {
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for (auto _ : state) {
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int iterations = state.range(0);
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absl::BlockingCounter counter{iterations};
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for (int i = 0; i < iterations; ++i) {
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counter.DecrementCount();
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}
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counter.Wait();
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}
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}
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BENCHMARK(BM_BlockingCounter_SingleThread)
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->ArgName("iterations")
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->Arg(2)
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->Arg(4)
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->Arg(16)
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->Arg(64)
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->Arg(256);
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void BM_BlockingCounter_DecrementCount(benchmark::State& state) {
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static absl::BlockingCounter* counter =
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new absl::BlockingCounter{std::numeric_limits<int>::max()};
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for (auto _ : state) {
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counter->DecrementCount();
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}
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}
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BENCHMARK(BM_BlockingCounter_DecrementCount)
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->Threads(2)
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->Threads(4)
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->Threads(6)
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->Threads(8)
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->Threads(10)
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->Threads(12)
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->Threads(16)
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->Threads(32)
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->Threads(64)
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->Threads(128);
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void BM_BlockingCounter_Wait(benchmark::State& state) {
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int num_threads = state.range(0);
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absl::synchronization_internal::ThreadPool pool(num_threads);
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for (auto _ : state) {
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absl::BlockingCounter counter{num_threads};
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pool.Schedule([num_threads, &counter, &pool]() {
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for (int i = 0; i < num_threads; ++i) {
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pool.Schedule([&counter]() { counter.DecrementCount(); });
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}
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});
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counter.Wait();
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}
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}
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BENCHMARK(BM_BlockingCounter_Wait)
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->ArgName("threads")
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->Arg(2)
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->Arg(4)
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->Arg(8)
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->Arg(16)
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->Arg(32)
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->Arg(64)
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->Arg(128);
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} // namespace
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