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/*
* Copyright (C) 2013 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 "benchmark.h"
#include <sys/syscall.h>
#include <time.h>
#if defined(__BIONIC__)
// Used by the horrible android.text.format.Time class, which is used by Calendar. http://b/8270865.
extern "C" void localtime_tz(const time_t* const timep, struct tm* tmp, const char* tz);
static void BM_time_localtime_tz(int iters) {
StartBenchmarkTiming();
time_t now(time(NULL));
tm broken_down_time;
for (int i = 0; i < iters; ++i) {
localtime_tz(&now, &broken_down_time, "Europe/Berlin");
}
StopBenchmarkTiming();
}
BENCHMARK(BM_time_localtime_tz);
#endif
static void BM_time_clock_gettime(int iters) {
StartBenchmarkTiming();
timespec t;
for (int i = 0; i < iters; ++i) {
clock_gettime(CLOCK_MONOTONIC, &t);
}
StopBenchmarkTiming();
}
BENCHMARK(BM_time_clock_gettime);
static void BM_time_clock_gettime_syscall(int iters) {
StartBenchmarkTiming();
timespec t;
for (int i = 0; i < iters; ++i) {
syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &t);
}
StopBenchmarkTiming();
}
BENCHMARK(BM_time_clock_gettime_syscall);
static void BM_time_gettimeofday(int iters) {
StartBenchmarkTiming();
timeval tv;
for (int i = 0; i < iters; ++i) {
gettimeofday(&tv, NULL);
}
StopBenchmarkTiming();
}
BENCHMARK(BM_time_gettimeofday);
static void BM_time_gettimeofday_syscall(int iters) {
StartBenchmarkTiming();
timeval tv;
for (int i = 0; i < iters; ++i) {
syscall(__NR_gettimeofday, &tv, NULL);
}
StopBenchmarkTiming();
}
BENCHMARK(BM_time_gettimeofday_syscall);
static void BM_time_time(int iters) {
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
time(NULL);
}
StopBenchmarkTiming();
}
BENCHMARK(BM_time_time);
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