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/*
* Copyright (C) 2014 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 <unistd.h>
static void BM_unistd_getpid(int iters) {
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
getpid();
}
StopBenchmarkTiming();
}
BENCHMARK(BM_unistd_getpid);
// Stop GCC optimizing out our pure function.
/* Must not be static! */ pid_t (*gettid_fp)() = gettid;
static void BM_unistd_gettid(int iters) {
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
gettid_fp();
}
StopBenchmarkTiming();
}
BENCHMARK(BM_unistd_gettid);
static void BM_unistd_gettid_syscall(int iters) {
StartBenchmarkTiming();
for (int i = 0; i < iters; ++i) {
syscall(__NR_gettid);
}
StopBenchmarkTiming();
}
BENCHMARK(BM_unistd_gettid_syscall);
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