1
2 /*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8 #include "BenchSysTimer_posix.h"
9
10 //Time
11 #include <time.h>
12
intervalInMSec(const timespec start_clock,const timespec end_clock)13 static double intervalInMSec(const timespec start_clock
14 , const timespec end_clock)
15 {
16 double duration_clock;
17 if ((end_clock.tv_nsec - start_clock.tv_nsec) < 0) {
18 duration_clock = (end_clock.tv_sec - start_clock.tv_sec-1)*1000;
19 duration_clock += (1000000000 + end_clock.tv_nsec - start_clock.tv_nsec)
20 / 1000000.0;
21 } else {
22 duration_clock = (end_clock.tv_sec - start_clock.tv_sec)*1000;
23 duration_clock += (end_clock.tv_nsec - start_clock.tv_nsec) / 1000000.0;
24 }
25 return duration_clock;
26 }
27
startWall()28 void BenchSysTimer::startWall() {
29 if (-1 == clock_gettime(CLOCK_MONOTONIC, &this->fWall)) {
30 timespec none = {0, 0};
31 this->fWall = none;
32 }
33 }
startCpu()34 void BenchSysTimer::startCpu() {
35 if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &this->fCpu)) {
36 timespec none = {0, 0};
37 this->fCpu = none;
38 }
39 }
40
endCpu()41 double BenchSysTimer::endCpu() {
42 timespec end_cpu;
43 if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end_cpu)) {
44 timespec none = {0, 0};
45 end_cpu = none;
46 }
47 return intervalInMSec(this->fCpu, end_cpu);
48 }
49
endWall()50 double BenchSysTimer::endWall() {
51 timespec end_wall;
52 if (-1 == clock_gettime(CLOCK_MONOTONIC, &end_wall)) {
53 timespec none = {0, 0};
54 end_wall = none;
55 }
56 return intervalInMSec(this->fWall, end_wall);
57 }
58