forked from emeryberger/dthreads
-
Notifications
You must be signed in to change notification settings - Fork 8
/
prof.cpp
104 lines (80 loc) · 2.4 KB
/
prof.cpp
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
#ifdef ENABLE_PROFILING
/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* @file Prof.cpp
* @brief Used for profiling.
* @author Tongping Liu <http://www.cs.umass.edu/~tonyliu>
* @author Charlie Curtsinger <http://www.cs.umass.edu/~charlie
*/
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "prof.h"
#define MAX_BUFFER 32768
double cpu_freq = 23.2750708008;
extern int allocTimes;
extern int cleanupSize;
extern unsigned long *serial_time;
static void get_time(struct timeinfo *ti) {
unsigned int tlow, thigh;
asm volatile ("rdtsc"
: "=a" (tlow),
"=d" (thigh));
ti->low = tlow;
ti->high = thigh;
}
static double get_elapsed(struct timeinfo *start, struct timeinfo *stop) {
double elapsed = 0.0;
elapsed = (double)(stop->low - start->low) + (double)(UINT_MAX)
*(double)(stop->high - start->high);
if (stop->low < start->low) {
elapsed -= (double)UINT_MAX;
}
return elapsed;
}
void start(struct timeinfo *ti) {
/* Clear the start_ti and stop_ti */
get_time(ti);
}
/*
* Stop timing.
*/
double stop(struct timeinfo *begin, struct timeinfo *end) {
double elapsed = 0.0;
struct timeinfo stop_ti;
if (end == NULL) {
get_time(&stop_ti);
elapsed = get_elapsed(begin, &stop_ti);
} else {
get_time(end);
elapsed = get_elapsed(begin, end);
}
return elapsed;
}
/* Provide a function to turn the elapsed time to microseconds. */
unsigned long elapsed2us(double elapsed) {
unsigned long us;
us = (unsigned long)(elapsed / cpu_freq);
return us;
}
#endif // ifdef ENABLE_PROFILING