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
21 #include <benchmark/Benchmark.h>
22
23 BENCHMARK_NO_ARG(BM_time_clock_gettime);
Run(int iters)24 void BM_time_clock_gettime::Run(int iters) {
25 StartBenchmarkTiming();
26
27 timespec t;
28 for (int i = 0; i < iters; ++i) {
29 clock_gettime(CLOCK_MONOTONIC, &t);
30 }
31
32 StopBenchmarkTiming();
33 }
34
35 BENCHMARK_NO_ARG(BM_time_clock_gettime_syscall);
Run(int iters)36 void BM_time_clock_gettime_syscall::Run(int iters) {
37 StartBenchmarkTiming();
38
39 timespec t;
40 for (int i = 0; i < iters; ++i) {
41 syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &t);
42 }
43
44 StopBenchmarkTiming();
45 }
46
47 BENCHMARK_NO_ARG(BM_time_gettimeofday);
Run(int iters)48 void BM_time_gettimeofday::Run(int iters) {
49 StartBenchmarkTiming();
50
51 timeval tv;
52 for (int i = 0; i < iters; ++i) {
53 gettimeofday(&tv, NULL);
54 }
55
56 StopBenchmarkTiming();
57 }
58
59 BENCHMARK_NO_ARG(BM_time_gettimeofday_syscall);
Run(int iters)60 void BM_time_gettimeofday_syscall::Run(int iters) {
61 StartBenchmarkTiming();
62
63 timeval tv;
64 for (int i = 0; i < iters; ++i) {
65 syscall(__NR_gettimeofday, &tv, NULL);
66 }
67
68 StopBenchmarkTiming();
69 }
70
71 BENCHMARK_NO_ARG(BM_time_time);
Run(int iters)72 void BM_time_time::Run(int iters) {
73 StartBenchmarkTiming();
74
75 for (int i = 0; i < iters; ++i) {
76 time(NULL);
77 }
78
79 StopBenchmarkTiming();
80 }
81