mirror of
https://github.com/google/benchmark.git
synced 2024-12-27 13:00:36 +08:00
227 lines
8.5 KiB
C++
227 lines
8.5 KiB
C++
#undef NDEBUG
|
|
#include <algorithm>
|
|
#include <cassert>
|
|
#include <cmath>
|
|
#include <cstdlib>
|
|
#include <vector>
|
|
|
|
#include "benchmark/benchmark.h"
|
|
#include "output_test.h"
|
|
|
|
namespace {
|
|
|
|
#define ADD_COMPLEXITY_CASES(...) \
|
|
int CONCAT(dummy, __LINE__) = AddComplexityTest(__VA_ARGS__)
|
|
|
|
int AddComplexityTest(const std::string &test_name,
|
|
const std::string &big_o_test_name,
|
|
const std::string &rms_test_name,
|
|
const std::string &big_o, int family_index) {
|
|
SetSubstitutions({{"%name", test_name},
|
|
{"%bigo_name", big_o_test_name},
|
|
{"%rms_name", rms_test_name},
|
|
{"%bigo_str", "[ ]* %float " + big_o},
|
|
{"%bigo", big_o},
|
|
{"%rms", "[ ]*[0-9]+ %"}});
|
|
AddCases(
|
|
TC_ConsoleOut,
|
|
{{"^%bigo_name %bigo_str %bigo_str[ ]*$"},
|
|
{"^%bigo_name", MR_Not}, // Assert we we didn't only matched a name.
|
|
{"^%rms_name %rms %rms[ ]*$", MR_Next}});
|
|
AddCases(
|
|
TC_JSONOut,
|
|
{{"\"name\": \"%bigo_name\",$"},
|
|
{"\"family_index\": " + std::to_string(family_index) + ",$", MR_Next},
|
|
{"\"per_family_instance_index\": 0,$", MR_Next},
|
|
{"\"run_name\": \"%name\",$", MR_Next},
|
|
{"\"run_type\": \"aggregate\",$", MR_Next},
|
|
{"\"repetitions\": %int,$", MR_Next},
|
|
{"\"threads\": 1,$", MR_Next},
|
|
{"\"aggregate_name\": \"BigO\",$", MR_Next},
|
|
{"\"aggregate_unit\": \"time\",$", MR_Next},
|
|
{"\"cpu_coefficient\": %float,$", MR_Next},
|
|
{"\"real_coefficient\": %float,$", MR_Next},
|
|
{"\"big_o\": \"%bigo\",$", MR_Next},
|
|
{"\"time_unit\": \"ns\"$", MR_Next},
|
|
{"}", MR_Next},
|
|
{"\"name\": \"%rms_name\",$"},
|
|
{"\"family_index\": " + std::to_string(family_index) + ",$", MR_Next},
|
|
{"\"per_family_instance_index\": 0,$", MR_Next},
|
|
{"\"run_name\": \"%name\",$", MR_Next},
|
|
{"\"run_type\": \"aggregate\",$", MR_Next},
|
|
{"\"repetitions\": %int,$", MR_Next},
|
|
{"\"threads\": 1,$", MR_Next},
|
|
{"\"aggregate_name\": \"RMS\",$", MR_Next},
|
|
{"\"aggregate_unit\": \"percentage\",$", MR_Next},
|
|
{"\"rms\": %float$", MR_Next},
|
|
{"}", MR_Next}});
|
|
AddCases(TC_CSVOut, {{"^\"%bigo_name\",,%float,%float,%bigo,,,,,$"},
|
|
{"^\"%bigo_name\"", MR_Not},
|
|
{"^\"%rms_name\",,%float,%float,,,,,,$", MR_Next}});
|
|
return 0;
|
|
}
|
|
|
|
} // end namespace
|
|
|
|
// ========================================================================= //
|
|
// --------------------------- Testing BigO O(1) --------------------------- //
|
|
// ========================================================================= //
|
|
|
|
void BM_Complexity_O1(benchmark::State &state) {
|
|
for (auto _ : state) {
|
|
for (int i = 0; i < 1024; ++i) {
|
|
benchmark::DoNotOptimize(&i);
|
|
}
|
|
}
|
|
state.SetComplexityN(state.range(0));
|
|
}
|
|
BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
|
|
BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity();
|
|
BENCHMARK(BM_Complexity_O1)
|
|
->Range(1, 1 << 18)
|
|
->Complexity([](benchmark::IterationCount) { return 1.0; });
|
|
|
|
const char *one_test_name = "BM_Complexity_O1";
|
|
const char *big_o_1_test_name = "BM_Complexity_O1_BigO";
|
|
const char *rms_o_1_test_name = "BM_Complexity_O1_RMS";
|
|
const char *enum_big_o_1 = "\\([0-9]+\\)";
|
|
// FIXME: Tolerate both '(1)' and 'lgN' as output when the complexity is auto
|
|
// deduced.
|
|
// See https://github.com/google/benchmark/issues/272
|
|
const char *auto_big_o_1 = "(\\([0-9]+\\))|(lgN)";
|
|
const char *lambda_big_o_1 = "f\\(N\\)";
|
|
|
|
// Add enum tests
|
|
ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
|
|
enum_big_o_1, /*family_index=*/0);
|
|
|
|
// Add auto enum tests
|
|
ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
|
|
auto_big_o_1, /*family_index=*/1);
|
|
|
|
// Add lambda tests
|
|
ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
|
|
lambda_big_o_1, /*family_index=*/2);
|
|
|
|
// ========================================================================= //
|
|
// --------------------------- Testing BigO O(N) --------------------------- //
|
|
// ========================================================================= //
|
|
|
|
std::vector<int> ConstructRandomVector(int64_t size) {
|
|
std::vector<int> v;
|
|
v.reserve(static_cast<size_t>(size));
|
|
for (int i = 0; i < size; ++i) {
|
|
v.push_back(static_cast<int>(std::rand() % size));
|
|
}
|
|
return v;
|
|
}
|
|
|
|
void BM_Complexity_O_N(benchmark::State &state) {
|
|
auto v = ConstructRandomVector(state.range(0));
|
|
// Test worst case scenario (item not in vector)
|
|
const int64_t item_not_in_vector = state.range(0) * 2;
|
|
for (auto _ : state) {
|
|
benchmark::DoNotOptimize(std::find(v.begin(), v.end(), item_not_in_vector));
|
|
}
|
|
state.SetComplexityN(state.range(0));
|
|
}
|
|
BENCHMARK(BM_Complexity_O_N)
|
|
->RangeMultiplier(2)
|
|
->Range(1 << 10, 1 << 16)
|
|
->Complexity(benchmark::oN);
|
|
BENCHMARK(BM_Complexity_O_N)
|
|
->RangeMultiplier(2)
|
|
->Range(1 << 10, 1 << 16)
|
|
->Complexity([](benchmark::IterationCount n) -> double {
|
|
return static_cast<double>(n);
|
|
});
|
|
BENCHMARK(BM_Complexity_O_N)
|
|
->RangeMultiplier(2)
|
|
->Range(1 << 10, 1 << 16)
|
|
->Complexity();
|
|
|
|
const char *n_test_name = "BM_Complexity_O_N";
|
|
const char *big_o_n_test_name = "BM_Complexity_O_N_BigO";
|
|
const char *rms_o_n_test_name = "BM_Complexity_O_N_RMS";
|
|
const char *enum_auto_big_o_n = "N";
|
|
const char *lambda_big_o_n = "f\\(N\\)";
|
|
|
|
// Add enum tests
|
|
ADD_COMPLEXITY_CASES(n_test_name, big_o_n_test_name, rms_o_n_test_name,
|
|
enum_auto_big_o_n, /*family_index=*/3);
|
|
|
|
// Add lambda tests
|
|
ADD_COMPLEXITY_CASES(n_test_name, big_o_n_test_name, rms_o_n_test_name,
|
|
lambda_big_o_n, /*family_index=*/4);
|
|
|
|
// ========================================================================= //
|
|
// ------------------------- Testing BigO O(N*lgN) ------------------------- //
|
|
// ========================================================================= //
|
|
|
|
static void BM_Complexity_O_N_log_N(benchmark::State &state) {
|
|
auto v = ConstructRandomVector(state.range(0));
|
|
for (auto _ : state) {
|
|
std::sort(v.begin(), v.end());
|
|
}
|
|
state.SetComplexityN(state.range(0));
|
|
}
|
|
static const double kLog2E = 1.44269504088896340736;
|
|
BENCHMARK(BM_Complexity_O_N_log_N)
|
|
->RangeMultiplier(2)
|
|
->Range(1 << 10, 1 << 16)
|
|
->Complexity(benchmark::oNLogN);
|
|
BENCHMARK(BM_Complexity_O_N_log_N)
|
|
->RangeMultiplier(2)
|
|
->Range(1 << 10, 1 << 16)
|
|
->Complexity([](benchmark::IterationCount n) {
|
|
return kLog2E * static_cast<double>(n) * log(static_cast<double>(n));
|
|
});
|
|
BENCHMARK(BM_Complexity_O_N_log_N)
|
|
->RangeMultiplier(2)
|
|
->Range(1 << 10, 1 << 16)
|
|
->Complexity();
|
|
|
|
const char *n_lg_n_test_name = "BM_Complexity_O_N_log_N";
|
|
const char *big_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_BigO";
|
|
const char *rms_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_RMS";
|
|
const char *enum_auto_big_o_n_lg_n = "NlgN";
|
|
const char *lambda_big_o_n_lg_n = "f\\(N\\)";
|
|
|
|
// Add enum tests
|
|
ADD_COMPLEXITY_CASES(n_lg_n_test_name, big_o_n_lg_n_test_name,
|
|
rms_o_n_lg_n_test_name, enum_auto_big_o_n_lg_n,
|
|
/*family_index=*/6);
|
|
|
|
// Add lambda tests
|
|
ADD_COMPLEXITY_CASES(n_lg_n_test_name, big_o_n_lg_n_test_name,
|
|
rms_o_n_lg_n_test_name, lambda_big_o_n_lg_n,
|
|
/*family_index=*/7);
|
|
|
|
// ========================================================================= //
|
|
// -------- Testing formatting of Complexity with captured args ------------ //
|
|
// ========================================================================= //
|
|
|
|
void BM_ComplexityCaptureArgs(benchmark::State &state, int n) {
|
|
for (auto _ : state) {
|
|
// This test requires a non-zero CPU time to avoid divide-by-zero
|
|
benchmark::DoNotOptimize(state.iterations());
|
|
}
|
|
state.SetComplexityN(n);
|
|
}
|
|
|
|
BENCHMARK_CAPTURE(BM_ComplexityCaptureArgs, capture_test, 100)
|
|
->Complexity(benchmark::oN)
|
|
->Ranges({{1, 2}, {3, 4}});
|
|
|
|
const std::string complexity_capture_name =
|
|
"BM_ComplexityCaptureArgs/capture_test";
|
|
|
|
ADD_COMPLEXITY_CASES(complexity_capture_name, complexity_capture_name + "_BigO",
|
|
complexity_capture_name + "_RMS", "N", /*family_index=*/9);
|
|
|
|
// ========================================================================= //
|
|
// --------------------------- TEST CASES END ------------------------------ //
|
|
// ========================================================================= //
|
|
|
|
int main(int argc, char *argv[]) { RunOutputTests(argc, argv); }
|