Du kan inte välja fler än 25 ämnen
Ämnen måste starta med en bokstav eller siffra, kan innehålla bindestreck ('-') och vara max 35 tecken långa.
274 rader
7.8 KiB
274 rader
7.8 KiB
#include "benchmark/benchmark.h"
|
|
|
|
#include <assert.h>
|
|
#include <math.h>
|
|
#include <stdint.h>
|
|
|
|
#include <chrono>
|
|
#include <complex>
|
|
#include <cstdlib>
|
|
#include <iostream>
|
|
#include <limits>
|
|
#include <list>
|
|
#include <map>
|
|
#include <mutex>
|
|
#include <set>
|
|
#include <sstream>
|
|
#include <string>
|
|
#include <thread>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
#if defined(__GNUC__)
|
|
#define BENCHMARK_NOINLINE __attribute__((noinline))
|
|
#else
|
|
#define BENCHMARK_NOINLINE
|
|
#endif
|
|
|
|
namespace {
|
|
|
|
int BENCHMARK_NOINLINE Factorial(int n) {
|
|
return (n == 1) ? 1 : n * Factorial(n - 1);
|
|
}
|
|
|
|
double CalculatePi(int depth) {
|
|
double pi = 0.0;
|
|
for (int i = 0; i < depth; ++i) {
|
|
double numerator = static_cast<double>(((i % 2) * 2) - 1);
|
|
double denominator = static_cast<double>((2 * i) - 1);
|
|
pi += numerator / denominator;
|
|
}
|
|
return (pi - 1.0) * 4;
|
|
}
|
|
|
|
std::set<int64_t> ConstructRandomSet(int64_t size) {
|
|
std::set<int64_t> s;
|
|
for (int i = 0; i < size; ++i) s.insert(s.end(), i);
|
|
return s;
|
|
}
|
|
|
|
std::mutex test_vector_mu;
|
|
std::vector<int>* test_vector = nullptr;
|
|
|
|
} // end namespace
|
|
|
|
static void BM_Factorial(benchmark::State& state) {
|
|
int fac_42 = 0;
|
|
for (auto _ : state) fac_42 = Factorial(8);
|
|
// Prevent compiler optimizations
|
|
std::stringstream ss;
|
|
ss << fac_42;
|
|
state.SetLabel(ss.str());
|
|
}
|
|
BENCHMARK(BM_Factorial);
|
|
BENCHMARK(BM_Factorial)->UseRealTime();
|
|
|
|
static void BM_CalculatePiRange(benchmark::State& state) {
|
|
double pi = 0.0;
|
|
for (auto _ : state) pi = CalculatePi(static_cast<int>(state.range(0)));
|
|
std::stringstream ss;
|
|
ss << pi;
|
|
state.SetLabel(ss.str());
|
|
}
|
|
BENCHMARK_RANGE(BM_CalculatePiRange, 1, 1024 * 1024);
|
|
|
|
static void BM_CalculatePi(benchmark::State& state) {
|
|
static const int depth = 1024;
|
|
for (auto _ : state) {
|
|
double pi = CalculatePi(static_cast<int>(depth));
|
|
benchmark::DoNotOptimize(pi);
|
|
}
|
|
}
|
|
BENCHMARK(BM_CalculatePi)->Threads(8);
|
|
BENCHMARK(BM_CalculatePi)->ThreadRange(1, 32);
|
|
BENCHMARK(BM_CalculatePi)->ThreadPerCpu();
|
|
|
|
static void BM_SetInsert(benchmark::State& state) {
|
|
std::set<int64_t> data;
|
|
for (auto _ : state) {
|
|
state.PauseTiming();
|
|
data = ConstructRandomSet(state.range(0));
|
|
state.ResumeTiming();
|
|
for (int j = 0; j < state.range(1); ++j) data.insert(rand());
|
|
}
|
|
state.SetItemsProcessed(state.iterations() * state.range(1));
|
|
state.SetBytesProcessed(state.iterations() * state.range(1) *
|
|
static_cast<int64_t>(sizeof(int)));
|
|
}
|
|
|
|
// Test many inserts at once to reduce the total iterations needed. Otherwise,
|
|
// the slower, non-timed part of each iteration will make the benchmark take
|
|
// forever.
|
|
BENCHMARK(BM_SetInsert)->Ranges({{1 << 10, 8 << 10}, {128, 512}});
|
|
|
|
template <typename Container,
|
|
typename ValueType = typename Container::value_type>
|
|
static void BM_Sequential(benchmark::State& state) {
|
|
ValueType v = 42;
|
|
for (auto _ : state) {
|
|
Container c;
|
|
for (int64_t i = state.range(0); --i;) c.push_back(v);
|
|
}
|
|
const int64_t items_processed = state.iterations() * state.range(0);
|
|
state.SetItemsProcessed(items_processed);
|
|
state.SetBytesProcessed(items_processed * static_cast<int64_t>(sizeof(v)));
|
|
}
|
|
BENCHMARK_TEMPLATE2(BM_Sequential, std::vector<int>, int)
|
|
->Range(1 << 0, 1 << 10);
|
|
BENCHMARK_TEMPLATE(BM_Sequential, std::list<int>)->Range(1 << 0, 1 << 10);
|
|
// Test the variadic version of BENCHMARK_TEMPLATE in C++11 and beyond.
|
|
#ifdef BENCHMARK_HAS_CXX11
|
|
BENCHMARK_TEMPLATE(BM_Sequential, std::vector<int>, int)->Arg(512);
|
|
#endif
|
|
|
|
static void BM_StringCompare(benchmark::State& state) {
|
|
size_t len = static_cast<size_t>(state.range(0));
|
|
std::string s1(len, '-');
|
|
std::string s2(len, '-');
|
|
for (auto _ : state) {
|
|
auto comp = s1.compare(s2);
|
|
benchmark::DoNotOptimize(comp);
|
|
}
|
|
}
|
|
BENCHMARK(BM_StringCompare)->Range(1, 1 << 20);
|
|
|
|
static void BM_SetupTeardown(benchmark::State& state) {
|
|
if (state.thread_index() == 0) {
|
|
// No need to lock test_vector_mu here as this is running single-threaded.
|
|
test_vector = new std::vector<int>();
|
|
}
|
|
int i = 0;
|
|
for (auto _ : state) {
|
|
std::lock_guard<std::mutex> l(test_vector_mu);
|
|
if (i % 2 == 0)
|
|
test_vector->push_back(i);
|
|
else
|
|
test_vector->pop_back();
|
|
++i;
|
|
}
|
|
if (state.thread_index() == 0) {
|
|
delete test_vector;
|
|
}
|
|
}
|
|
BENCHMARK(BM_SetupTeardown)->ThreadPerCpu();
|
|
|
|
static void BM_LongTest(benchmark::State& state) {
|
|
double tracker = 0.0;
|
|
for (auto _ : state) {
|
|
for (int i = 0; i < state.range(0); ++i)
|
|
benchmark::DoNotOptimize(tracker += i);
|
|
}
|
|
}
|
|
BENCHMARK(BM_LongTest)->Range(1 << 16, 1 << 28);
|
|
|
|
static void BM_ParallelMemset(benchmark::State& state) {
|
|
int64_t size = state.range(0) / static_cast<int64_t>(sizeof(int));
|
|
int thread_size = static_cast<int>(size) / state.threads();
|
|
int from = thread_size * state.thread_index();
|
|
int to = from + thread_size;
|
|
|
|
if (state.thread_index() == 0) {
|
|
test_vector = new std::vector<int>(static_cast<size_t>(size));
|
|
}
|
|
|
|
for (auto _ : state) {
|
|
for (int i = from; i < to; i++) {
|
|
// No need to lock test_vector_mu as ranges
|
|
// do not overlap between threads.
|
|
benchmark::DoNotOptimize(test_vector->at(static_cast<size_t>(i)) = 1);
|
|
}
|
|
}
|
|
|
|
if (state.thread_index() == 0) {
|
|
delete test_vector;
|
|
}
|
|
}
|
|
BENCHMARK(BM_ParallelMemset)->Arg(10 << 20)->ThreadRange(1, 4);
|
|
|
|
static void BM_ManualTiming(benchmark::State& state) {
|
|
int64_t slept_for = 0;
|
|
int64_t microseconds = state.range(0);
|
|
std::chrono::duration<double, std::micro> sleep_duration{
|
|
static_cast<double>(microseconds)};
|
|
|
|
for (auto _ : state) {
|
|
auto start = std::chrono::high_resolution_clock::now();
|
|
// Simulate some useful workload with a sleep
|
|
std::this_thread::sleep_for(
|
|
std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
|
|
auto end = std::chrono::high_resolution_clock::now();
|
|
|
|
auto elapsed =
|
|
std::chrono::duration_cast<std::chrono::duration<double>>(end - start);
|
|
|
|
state.SetIterationTime(elapsed.count());
|
|
slept_for += microseconds;
|
|
}
|
|
state.SetItemsProcessed(slept_for);
|
|
}
|
|
BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseRealTime();
|
|
BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseManualTime();
|
|
|
|
#ifdef BENCHMARK_HAS_CXX11
|
|
|
|
template <class... Args>
|
|
void BM_with_args(benchmark::State& state, Args&&...) {
|
|
for (auto _ : state) {
|
|
}
|
|
}
|
|
BENCHMARK_CAPTURE(BM_with_args, int_test, 42, 43, 44);
|
|
BENCHMARK_CAPTURE(BM_with_args, string_and_pair_test, std::string("abc"),
|
|
std::pair<int, double>(42, 3.8));
|
|
|
|
void BM_non_template_args(benchmark::State& state, int, double) {
|
|
while (state.KeepRunning()) {
|
|
}
|
|
}
|
|
BENCHMARK_CAPTURE(BM_non_template_args, basic_test, 0, 0);
|
|
|
|
#endif // BENCHMARK_HAS_CXX11
|
|
|
|
static void BM_DenseThreadRanges(benchmark::State& st) {
|
|
switch (st.range(0)) {
|
|
case 1:
|
|
assert(st.threads() == 1 || st.threads() == 2 || st.threads() == 3);
|
|
break;
|
|
case 2:
|
|
assert(st.threads() == 1 || st.threads() == 3 || st.threads() == 4);
|
|
break;
|
|
case 3:
|
|
assert(st.threads() == 5 || st.threads() == 8 || st.threads() == 11 ||
|
|
st.threads() == 14);
|
|
break;
|
|
default:
|
|
assert(false && "Invalid test case number");
|
|
}
|
|
while (st.KeepRunning()) {
|
|
}
|
|
}
|
|
BENCHMARK(BM_DenseThreadRanges)->Arg(1)->DenseThreadRange(1, 3);
|
|
BENCHMARK(BM_DenseThreadRanges)->Arg(2)->DenseThreadRange(1, 4, 2);
|
|
BENCHMARK(BM_DenseThreadRanges)->Arg(3)->DenseThreadRange(5, 14, 3);
|
|
|
|
static void BM_BenchmarkName(benchmark::State& state) {
|
|
for (auto _ : state) {
|
|
}
|
|
|
|
// Check that the benchmark name is passed correctly to `state`.
|
|
assert("BM_BenchmarkName" == state.name());
|
|
}
|
|
BENCHMARK(BM_BenchmarkName);
|
|
|
|
// regression test for #1446
|
|
template <typename type>
|
|
static void BM_templated_test(benchmark::State& state) {
|
|
for (auto _ : state) {
|
|
type created_string;
|
|
benchmark::DoNotOptimize(created_string);
|
|
}
|
|
}
|
|
|
|
static auto BM_templated_test_double = BM_templated_test<std::complex<double>>;
|
|
BENCHMARK(BM_templated_test_double);
|
|
|
|
BENCHMARK_MAIN();
|