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c5f454957d
GCC 4.7 doesn't provide std::this_thread::sleep_for on my system. This patch changes the tests to use a different method for wasting cycles.
47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
#include "benchmark/benchmark_api.h"
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#include <chrono>
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#include <thread>
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void BM_basic(benchmark::State& state) {
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while (state.KeepRunning()) {
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}
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}
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void BM_basic_slow(benchmark::State& state) {
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std::chrono::milliseconds sleep_duration(state.range_x());
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while (state.KeepRunning()) {
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// Simulate some useful workload by sleeping.
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// Note: std::this_thread::sleep_for doesn't work with GCC 4.7 on some
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// platforms.
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const auto sleep_end = std::chrono::steady_clock::now() + sleep_duration;
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while (std::chrono::steady_clock::now() < sleep_end) {}
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}
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}
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BENCHMARK(BM_basic);
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BENCHMARK(BM_basic)->Arg(42);
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BENCHMARK(BM_basic_slow)->Arg(10)->Unit(benchmark::kNanosecond);
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BENCHMARK(BM_basic_slow)->Arg(100)->Unit(benchmark::kMicrosecond);
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BENCHMARK(BM_basic_slow)->Arg(1000)->Unit(benchmark::kMillisecond);
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BENCHMARK(BM_basic)->Range(1, 8);
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BENCHMARK(BM_basic)->RangeMultiplier(2)->Range(1, 8);
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BENCHMARK(BM_basic)->DenseRange(10, 15);
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BENCHMARK(BM_basic)->ArgPair(42, 42);
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BENCHMARK(BM_basic)->RangePair(64, 512, 64, 512);
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BENCHMARK(BM_basic)->MinTime(0.7);
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BENCHMARK(BM_basic)->UseRealTime();
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BENCHMARK(BM_basic)->ThreadRange(2, 4);
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BENCHMARK(BM_basic)->ThreadPerCpu();
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BENCHMARK(BM_basic)->Repetitions(3);
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void CustomArgs(benchmark::internal::Benchmark* b) {
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for (int i = 0; i < 10; ++i) {
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b->Arg(i);
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}
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}
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BENCHMARK(BM_basic)->Apply(CustomArgs);
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BENCHMARK_MAIN()
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