Abseil Common Libraries (C++) (grcp 依赖)
https://abseil.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.2 KiB
83 lines
2.2 KiB
// Copyright 2021 The Abseil Authors. |
|
// |
|
// 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 |
|
// |
|
// https://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 <limits> |
|
|
|
#include "absl/synchronization/blocking_counter.h" |
|
#include "absl/synchronization/internal/thread_pool.h" |
|
#include "benchmark/benchmark.h" |
|
|
|
namespace { |
|
|
|
void BM_BlockingCounter_SingleThread(benchmark::State& state) { |
|
for (auto _ : state) { |
|
int iterations = state.range(0); |
|
absl::BlockingCounter counter{iterations}; |
|
for (int i = 0; i < iterations; ++i) { |
|
counter.DecrementCount(); |
|
} |
|
counter.Wait(); |
|
} |
|
} |
|
BENCHMARK(BM_BlockingCounter_SingleThread) |
|
->ArgName("iterations") |
|
->Arg(2) |
|
->Arg(4) |
|
->Arg(16) |
|
->Arg(64) |
|
->Arg(256); |
|
|
|
void BM_BlockingCounter_DecrementCount(benchmark::State& state) { |
|
static absl::BlockingCounter* counter = |
|
new absl::BlockingCounter{std::numeric_limits<int>::max()}; |
|
for (auto _ : state) { |
|
counter->DecrementCount(); |
|
} |
|
} |
|
BENCHMARK(BM_BlockingCounter_DecrementCount) |
|
->Threads(2) |
|
->Threads(4) |
|
->Threads(6) |
|
->Threads(8) |
|
->Threads(10) |
|
->Threads(12) |
|
->Threads(16) |
|
->Threads(32) |
|
->Threads(64) |
|
->Threads(128); |
|
|
|
void BM_BlockingCounter_Wait(benchmark::State& state) { |
|
int num_threads = state.range(0); |
|
absl::synchronization_internal::ThreadPool pool(num_threads); |
|
for (auto _ : state) { |
|
absl::BlockingCounter counter{num_threads}; |
|
pool.Schedule([num_threads, &counter, &pool]() { |
|
for (int i = 0; i < num_threads; ++i) { |
|
pool.Schedule([&counter]() { counter.DecrementCount(); }); |
|
} |
|
}); |
|
counter.Wait(); |
|
} |
|
} |
|
BENCHMARK(BM_BlockingCounter_Wait) |
|
->ArgName("threads") |
|
->Arg(2) |
|
->Arg(4) |
|
->Arg(8) |
|
->Arg(16) |
|
->Arg(32) |
|
->Arg(64) |
|
->Arg(128); |
|
|
|
} // namespace
|
|
|