112 lines
4.7 KiB
C++
112 lines
4.7 KiB
C++
#include "LibcBenchmark.h"
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#include "LibcMemoryBenchmark.h"
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#include "MemorySizeDistributions.h"
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#include "benchmark/benchmark.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/Twine.h"
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#include <chrono>
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#include <cstdint>
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#include <random>
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#include <vector>
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using llvm::Align;
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using llvm::ArrayRef;
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using llvm::Twine;
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using llvm::libc_benchmarks::BzeroConfiguration;
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using llvm::libc_benchmarks::ComparisonSetup;
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using llvm::libc_benchmarks::CopySetup;
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using llvm::libc_benchmarks::MemcmpOrBcmpConfiguration;
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using llvm::libc_benchmarks::MemcpyConfiguration;
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using llvm::libc_benchmarks::MemorySizeDistribution;
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using llvm::libc_benchmarks::MemsetConfiguration;
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using llvm::libc_benchmarks::OffsetDistribution;
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using llvm::libc_benchmarks::SetSetup;
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// Alignment to use for when accessing the buffers.
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static constexpr Align kBenchmarkAlignment = Align::Constant<1>();
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static std::mt19937_64 &getGenerator() {
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static std::mt19937_64 Generator(
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std::chrono::system_clock::now().time_since_epoch().count());
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return Generator;
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}
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template <typename SetupType, typename ConfigurationType> struct Runner {
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Runner(benchmark::State &S, llvm::ArrayRef<ConfigurationType> Configurations)
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: State(S), Distribution(SetupType::getDistributions()[State.range(0)]),
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Probabilities(Distribution.Probabilities),
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SizeSampler(Probabilities.begin(), Probabilities.end()),
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OffsetSampler(Setup.BufferSize, Probabilities.size() - 1,
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kBenchmarkAlignment),
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Configuration(Configurations[State.range(1)]) {
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for (auto &P : Setup.Parameters) {
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P.OffsetBytes = OffsetSampler(getGenerator());
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P.SizeBytes = SizeSampler(getGenerator());
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Setup.checkValid(P);
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}
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}
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~Runner() {
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const size_t AvgBytesPerIteration = Setup.getBatchBytes() / Setup.BatchSize;
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const size_t TotalBytes = State.iterations() * AvgBytesPerIteration;
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State.SetBytesProcessed(TotalBytes);
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State.SetItemsProcessed(State.iterations());
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State.SetLabel((Twine(Configuration.Name) + "," + Distribution.Name).str());
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State.counters["bytes_per_cycle"] = benchmark::Counter(
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TotalBytes / benchmark::CPUInfo::Get().cycles_per_second,
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benchmark::Counter::kIsRate);
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}
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inline void runBatch() {
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for (const auto &P : Setup.Parameters)
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benchmark::DoNotOptimize(Setup.Call(P, Configuration.Function));
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}
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size_t getBatchSize() const { return Setup.BatchSize; }
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private:
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SetupType Setup;
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benchmark::State &State;
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MemorySizeDistribution Distribution;
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ArrayRef<double> Probabilities;
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std::discrete_distribution<unsigned> SizeSampler;
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OffsetDistribution OffsetSampler;
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ConfigurationType Configuration;
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};
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#define BENCHMARK_MEMORY_FUNCTION(BM_NAME, SETUP, CONFIGURATION_TYPE, \
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CONFIGURATION_ARRAY_REF) \
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void BM_NAME(benchmark::State &State) { \
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Runner<SETUP, CONFIGURATION_TYPE> Setup(State, CONFIGURATION_ARRAY_REF); \
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const size_t BatchSize = Setup.getBatchSize(); \
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while (State.KeepRunningBatch(BatchSize)) \
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Setup.runBatch(); \
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} \
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BENCHMARK(BM_NAME)->Apply([](benchmark::internal::Benchmark *benchmark) { \
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const int64_t DistributionSize = SETUP::getDistributions().size(); \
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const int64_t ConfigurationSize = CONFIGURATION_ARRAY_REF.size(); \
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for (int64_t DistIndex = 0; DistIndex < DistributionSize; ++DistIndex) \
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for (int64_t ConfIndex = 0; ConfIndex < ConfigurationSize; ++ConfIndex) \
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benchmark->Args({DistIndex, ConfIndex}); \
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})
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extern llvm::ArrayRef<MemcpyConfiguration> getMemcpyConfigurations();
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BENCHMARK_MEMORY_FUNCTION(BM_Memcpy, CopySetup, MemcpyConfiguration,
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getMemcpyConfigurations());
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extern llvm::ArrayRef<MemcmpOrBcmpConfiguration> getMemcmpConfigurations();
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BENCHMARK_MEMORY_FUNCTION(BM_Memcmp, ComparisonSetup, MemcmpOrBcmpConfiguration,
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getMemcmpConfigurations());
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extern llvm::ArrayRef<MemcmpOrBcmpConfiguration> getBcmpConfigurations();
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BENCHMARK_MEMORY_FUNCTION(BM_Bcmp, ComparisonSetup, MemcmpOrBcmpConfiguration,
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getBcmpConfigurations());
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extern llvm::ArrayRef<MemsetConfiguration> getMemsetConfigurations();
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BENCHMARK_MEMORY_FUNCTION(BM_Memset, SetSetup, MemsetConfiguration,
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getMemsetConfigurations());
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extern llvm::ArrayRef<BzeroConfiguration> getBzeroConfigurations();
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BENCHMARK_MEMORY_FUNCTION(BM_Bzero, SetSetup, BzeroConfiguration,
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getBzeroConfigurations());
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