1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <sys/syscall.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include <benchmark/benchmark.h>
#include "util.h"
static void BM_time_clock_gettime(benchmark::State& state) {
// CLOCK_MONOTONIC is required supported in vdso
timespec t;
while (state.KeepRunning()) {
clock_gettime(CLOCK_MONOTONIC, &t);
}
}
BIONIC_BENCHMARK(BM_time_clock_gettime);
static void BM_time_clock_gettime_syscall(benchmark::State& state) {
// CLOCK_MONOTONIC is required supported in vdso
timespec t;
while (state.KeepRunning()) {
syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &t);
}
}
BIONIC_BENCHMARK(BM_time_clock_gettime_syscall);
static void BM_time_clock_gettime_MONOTONIC_COARSE(benchmark::State& state) {
// CLOCK_MONOTONIC_COARSE is required supported in vdso
timespec t;
while (state.KeepRunning()) {
clock_gettime(CLOCK_MONOTONIC_COARSE, &t);
}
}
BIONIC_BENCHMARK(BM_time_clock_gettime_MONOTONIC_COARSE);
static void BM_time_clock_gettime_MONOTONIC_RAW(benchmark::State& state) {
// CLOCK_MONOTONIC_RAW is required supported in vdso
timespec t;
while (state.KeepRunning()) {
clock_gettime(CLOCK_MONOTONIC_RAW, &t);
}
}
BIONIC_BENCHMARK(BM_time_clock_gettime_MONOTONIC_RAW);
static void BM_time_clock_gettime_REALTIME(benchmark::State& state) {
// CLOCK_REALTIME is required supported in vdso
timespec t;
while (state.KeepRunning()) {
clock_gettime(CLOCK_REALTIME, &t);
}
}
BIONIC_BENCHMARK(BM_time_clock_gettime_REALTIME);
static void BM_time_clock_gettime_REALTIME_COARSE(benchmark::State& state) {
// CLOCK_REALTIME_COARSE is required supported in vdso
timespec t;
while (state.KeepRunning()) {
clock_gettime(CLOCK_REALTIME_COARSE, &t);
}
}
BIONIC_BENCHMARK(BM_time_clock_gettime_REALTIME_COARSE);
static void BM_time_clock_gettime_BOOTTIME(benchmark::State& state) {
// CLOCK_BOOTTIME is optionally supported in vdso
timespec t;
while (state.KeepRunning()) {
clock_gettime(CLOCK_BOOTTIME, &t);
}
}
BIONIC_BENCHMARK(BM_time_clock_gettime_BOOTTIME);
static void BM_time_gettimeofday(benchmark::State& state) {
timeval tv;
while (state.KeepRunning()) {
gettimeofday(&tv, nullptr);
}
}
BIONIC_BENCHMARK(BM_time_gettimeofday);
void BM_time_gettimeofday_syscall(benchmark::State& state) {
timeval tv;
while (state.KeepRunning()) {
syscall(__NR_gettimeofday, &tv, nullptr);
}
}
BIONIC_BENCHMARK(BM_time_gettimeofday_syscall);
void BM_time_time(benchmark::State& state) {
while (state.KeepRunning()) {
time(nullptr);
}
}
BIONIC_BENCHMARK(BM_time_time);
void BM_time_localtime(benchmark::State& state) {
time_t t = time(nullptr);
while (state.KeepRunning()) {
localtime(&t);
}
}
BIONIC_BENCHMARK(BM_time_localtime);
void BM_time_localtime_r(benchmark::State& state) {
time_t t = time(nullptr);
while (state.KeepRunning()) {
struct tm tm;
localtime_r(&t, &tm);
}
}
BIONIC_BENCHMARK(BM_time_localtime_r);
|
