100 lines
2.3 KiB
C++
100 lines
2.3 KiB
C++
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "benchmark.h"
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#include <sys/syscall.h>
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#include <time.h>
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#if defined(__BIONIC__)
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// Used by the horrible android.text.format.Time class, which is used by Calendar. http://b/8270865.
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extern "C" void localtime_tz(const time_t* const timep, struct tm* tmp, const char* tz);
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static void BM_time_localtime_tz(int iters) {
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StartBenchmarkTiming();
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time_t now(time(NULL));
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tm broken_down_time;
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for (int i = 0; i < iters; ++i) {
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localtime_tz(&now, &broken_down_time, "Europe/Berlin");
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}
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StopBenchmarkTiming();
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}
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BENCHMARK(BM_time_localtime_tz);
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#endif
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static void BM_time_clock_gettime(int iters) {
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StartBenchmarkTiming();
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timespec t;
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for (int i = 0; i < iters; ++i) {
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clock_gettime(CLOCK_MONOTONIC, &t);
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}
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StopBenchmarkTiming();
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}
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BENCHMARK(BM_time_clock_gettime);
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static void BM_time_clock_gettime_syscall(int iters) {
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StartBenchmarkTiming();
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timespec t;
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for (int i = 0; i < iters; ++i) {
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syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &t);
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}
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StopBenchmarkTiming();
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}
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BENCHMARK(BM_time_clock_gettime_syscall);
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static void BM_time_gettimeofday(int iters) {
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StartBenchmarkTiming();
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timeval tv;
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for (int i = 0; i < iters; ++i) {
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gettimeofday(&tv, NULL);
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}
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StopBenchmarkTiming();
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}
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BENCHMARK(BM_time_gettimeofday);
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static void BM_time_gettimeofday_syscall(int iters) {
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StartBenchmarkTiming();
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timeval tv;
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for (int i = 0; i < iters; ++i) {
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syscall(__NR_gettimeofday, &tv, NULL);
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}
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StopBenchmarkTiming();
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}
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BENCHMARK(BM_time_gettimeofday_syscall);
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static void BM_time_time(int iters) {
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StartBenchmarkTiming();
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for (int i = 0; i < iters; ++i) {
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time(NULL);
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}
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StopBenchmarkTiming();
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}
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BENCHMARK(BM_time_time);
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