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 "benchmark.h"
18
19#include <sys/syscall.h>
20#include <time.h>
21
22static void BM_time_clock_gettime(int iters) {
23  StartBenchmarkTiming();
24
25  timespec t;
26  for (int i = 0; i < iters; ++i) {
27    clock_gettime(CLOCK_MONOTONIC, &t);
28  }
29
30  StopBenchmarkTiming();
31}
32BENCHMARK(BM_time_clock_gettime);
33
34static void BM_time_clock_gettime_syscall(int iters) {
35  StartBenchmarkTiming();
36
37  timespec t;
38  for (int i = 0; i < iters; ++i) {
39    syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &t);
40  }
41
42  StopBenchmarkTiming();
43}
44BENCHMARK(BM_time_clock_gettime_syscall);
45
46static void BM_time_gettimeofday(int iters) {
47  StartBenchmarkTiming();
48
49  timeval tv;
50  for (int i = 0; i < iters; ++i) {
51    gettimeofday(&tv, NULL);
52  }
53
54  StopBenchmarkTiming();
55}
56BENCHMARK(BM_time_gettimeofday);
57
58static void BM_time_gettimeofday_syscall(int iters) {
59  StartBenchmarkTiming();
60
61  timeval tv;
62  for (int i = 0; i < iters; ++i) {
63    syscall(__NR_gettimeofday, &tv, NULL);
64  }
65
66  StopBenchmarkTiming();
67}
68BENCHMARK(BM_time_gettimeofday_syscall);
69
70static void BM_time_time(int iters) {
71  StartBenchmarkTiming();
72
73  for (int i = 0; i < iters; ++i) {
74    time(NULL);
75  }
76
77  StopBenchmarkTiming();
78}
79BENCHMARK(BM_time_time);
80