1/*
2 * Copyright (C) 2013 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 <sys/time.h>
19#include <time.h>
20#include <unistd.h>
21
22#include <benchmark/benchmark.h>
23
24static void BM_time_clock_gettime(benchmark::State& state) {
25  timespec t;
26  while (state.KeepRunning()) {
27    clock_gettime(CLOCK_MONOTONIC, &t);
28  }
29}
30BENCHMARK(BM_time_clock_gettime);
31
32static void BM_time_clock_gettime_syscall(benchmark::State& state) {
33  timespec t;
34  while (state.KeepRunning()) {
35    syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &t);
36  }
37}
38BENCHMARK(BM_time_clock_gettime_syscall);
39
40static void BM_time_gettimeofday(benchmark::State& state) {
41  timeval tv;
42  while (state.KeepRunning()) {
43    gettimeofday(&tv, NULL);
44  }
45}
46BENCHMARK(BM_time_gettimeofday);
47
48void BM_time_gettimeofday_syscall(benchmark::State& state) {
49  timeval tv;
50  while (state.KeepRunning()) {
51    syscall(__NR_gettimeofday, &tv, NULL);
52  }
53}
54BENCHMARK(BM_time_gettimeofday_syscall);
55
56void BM_time_time(benchmark::State& state) {
57  while (state.KeepRunning()) {
58    time(NULL);
59  }
60}
61BENCHMARK(BM_time_time);
62