1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <sys/syscall.h>
18#include <unistd.h>
19
20#include <benchmark/benchmark.h>
21
22static void BM_unistd_getpid(benchmark::State& state) {
23  while (state.KeepRunning()) {
24    getpid();
25  }
26}
27BENCHMARK(BM_unistd_getpid);
28
29static void BM_unistd_getpid_syscall(benchmark::State& state) {
30  while (state.KeepRunning()) {
31    syscall(__NR_getpid);
32  }
33}
34BENCHMARK(BM_unistd_getpid_syscall);
35
36#if defined(__BIONIC__)
37
38// Stop GCC optimizing out our pure function.
39/* Must not be static! */ pid_t (*gettid_fp)() = gettid;
40
41static void BM_unistd_gettid(benchmark::State& state) {
42  while (state.KeepRunning()) {
43    gettid_fp();
44  }
45}
46BENCHMARK(BM_unistd_gettid);
47
48#endif
49
50void BM_unistd_gettid_syscall(benchmark::State& state) {
51  while (state.KeepRunning()) {
52    syscall(__NR_gettid);
53  }
54}
55BENCHMARK(BM_unistd_gettid_syscall);
56
57BENCHMARK_MAIN()
58