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
BM_time_clock_gettime(int iters)22 static 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 }
32 BENCHMARK(BM_time_clock_gettime);
33
BM_time_clock_gettime_syscall(int iters)34 static 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 }
44 BENCHMARK(BM_time_clock_gettime_syscall);
45
BM_time_gettimeofday(int iters)46 static 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 }
56 BENCHMARK(BM_time_gettimeofday);
57
BM_time_gettimeofday_syscall(int iters)58 static 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 }
68 BENCHMARK(BM_time_gettimeofday_syscall);
69
BM_time_time(int iters)70 static 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 }
79 BENCHMARK(BM_time_time);
80