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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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 <inttypes.h>
#include <regex.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <time.h>
#include <string>
#include <vector>
#include <base/stringprintf.h>
#include <benchmark/Benchmark.h>
#include "utils.h"
namespace testing {
static uint64_t NanoTime() {
struct timespec t;
t.tv_sec = t.tv_nsec = 0;
clock_gettime(CLOCK_MONOTONIC, &t);
return static_cast<uint64_t>(t.tv_sec) * 1000000000LL + t.tv_nsec;
}
bool Benchmark::header_printed_;
std::vector<Benchmark*>& Benchmark::List() {
static std::vector<Benchmark*> list;
return list;
}
int Benchmark::MaxNameColumnWidth() {
size_t max = 20;
for (auto& benchmark : List()) {
max = std::max(max, benchmark->NameColumnWidth());
}
return static_cast<int>(max);
}
size_t Benchmark::RunAll(std::vector<regex_t*>& regs) {
size_t benchmarks_run = 0;
header_printed_ = false;
for (auto& benchmark : List()) {
benchmarks_run += benchmark->RunAllArgs(regs);
}
return benchmarks_run;
}
void Benchmark::PrintHeader() {
if (!header_printed_) {
printf("%-*s %10s %10s\n", MaxNameColumnWidth(), "", "iterations", "ns/op");
header_printed_ = true;
}
}
template <typename T>
bool BenchmarkT<T>::ShouldRun(std::vector<regex_t*>& regs, T arg) {
if (regs.empty()) {
return true;
}
for (const auto& re : regs) {
if (regexec(re, GetNameStr(arg).c_str(), 0, NULL, 0) != REG_NOMATCH) {
return true;
}
}
return false;
}
void Benchmark::StopBenchmarkTiming() {
if (start_time_ns_ != 0) {
total_time_ns_ += NanoTime() - start_time_ns_;
}
start_time_ns_ = 0;
}
void Benchmark::StartBenchmarkTiming() {
if (start_time_ns_ == 0) {
start_time_ns_ = NanoTime();
}
}
std::string BenchmarkWithoutArg::GetNameStr(void*) {
return Name();
}
template <>
std::string BenchmarkWithArg<int>::GetNameStr(int arg) {
return Name() + "/" + PrettyInt(arg, 2);
}
template <>
std::string BenchmarkWithArg<double>::GetNameStr(double arg) {
return Name() + "/" + android::base::StringPrintf("%0.6f", arg);
}
template<typename T>
void BenchmarkT<T>::RunWithArg(T arg) {
int new_iterations = 1;
int iterations;
while (new_iterations < 1e8) {
bytes_processed_ = 0;
total_time_ns_ = 0;
start_time_ns_ = 0;
iterations = new_iterations;
RunIterations(iterations, arg);
if (total_time_ns_ >= 1e9) {
break;
}
if (total_time_ns_/iterations == 0) {
new_iterations = 1e9;
} else {
new_iterations = 1e9/ (total_time_ns_/iterations);
}
new_iterations = std::max(iterations + 1,
std::min(new_iterations + new_iterations/2, 100*iterations));
new_iterations = Round(new_iterations);
}
printf("%-*s %10s %10" PRId64, MaxNameColumnWidth(), GetNameStr(arg).c_str(),
PrettyInt(iterations, 10).c_str(), total_time_ns_/iterations);
if (total_time_ns_ > 0 && bytes_processed_ > 0) {
double gib_processed = static_cast<double>(bytes_processed_)/1e9;
double seconds = static_cast<double>(total_time_ns_)/1e9;
printf(" %8.3f GiB/s", gib_processed/seconds);
}
printf("\n");
fflush(stdout);
}
template class BenchmarkT<int>;
template class BenchmarkT<double>;
template class BenchmarkT<void*>;
template class BenchmarkWithArg<int>;
template class BenchmarkWithArg<double>;
} // namespace testing
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