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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/* Copyright (C) 2021-2024 Free Software Foundation, Inc.
Contributed by Oracle.
This file is part of GNU Binutils.
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 3, 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, 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "config.h"
#include <time.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/resource.h>
#include "gp-defs.h"
#include "gp-time.h"
/* =============================================================== */
/*
* Below this are the get_clock_rate() and get_ncpus() for all architectures
*/
static int clock_rate = 0;
static int ncpus = 0;
static char msgbuf[1024];
int
get_clock_rate (void)
{
/* Linux version -- read /proc/cpuinfo
* Note the parsing is different on intel-Linux and sparc-Linux
*/
FILE *fp = fopen ("/proc/cpuinfo", "r");
if (fp != NULL)
{
char temp[1024];
while (fgets (temp, sizeof (temp), fp) != NULL)
{
#if ARCH(SPARC)
/* cpu count for SPARC linux -- read from /proc/cpuinfo */
if (strncmp (temp, "ncpus active", 12) == 0)
{
char *val = strchr (temp, ':');
ncpus = val ? atol (val + 1) : 0;
}
#endif /* ARCH(SPARC) */
if (clock_rate == 0)
{
/* pick the first line that gives a CPU clock rate */
#if ARCH(SPARC)
long long clk;
if (strncmp (temp, "Cpu0ClkTck", 10) == 0)
{
char *val = strchr (temp, ':');
clk = val ? strtoll (val + 1, NULL, 16) : 0;
clock_rate = (int) (clk / 1000000);
}
#else
if (strncmp (temp, "cpu MHz", 7) == 0)
{
char *val = strchr (temp, ':');
clock_rate = val ? atoi (val + 1) : 0;
}
#endif /* ARCH() */
}
/* did we get a clock rate? */
if (clock_rate != 0)
{
#if ARCH(SPARC)
/* since we got a cpu count, we can break from the look */
break;
#endif /* ARCH(SPARC) */
}
#if ARCH(Intel)
/* On intel-Linux, count cpus based on "cpu MHz" lines */
if (strncmp (temp, "cpu MHz", 7) == 0)
ncpus++;
#endif /* ARCH(Intel) */
}
fclose (fp);
}
if (clock_rate != 0)
sprintf (msgbuf,
"Clock rate = %d MHz (from reading /proc/cpuinfo) %d CPUs\n",
clock_rate, ncpus);
/* did we get a clock rate? */
if (clock_rate == 0)
{
clock_rate = 1000;
sprintf (msgbuf, "Clock rate = %d MHz (set by default) %d CPUs\n",
clock_rate, ncpus);
}
return clock_rate;
}
int
get_ncpus (void)
{
if (clock_rate == 0)
get_clock_rate ();
return ncpus;
}
/* gethrvtime -- generic solution, getting user time from
* clock_gettime(CLOCK_THREAD_CPUTIME_ID,..), and reformatting.
* need -lrt to compile.*/
hrtime_t
gethrvtime ()
{
struct timespec tp;
hrtime_t rc = 0;
int r = clock_gettime (CLOCK_THREAD_CPUTIME_ID, &tp);
if (r == 0)
rc = ((hrtime_t) tp.tv_sec) * 1000000000 + (hrtime_t) tp.tv_nsec;
return rc;
}
/*
* CLOCK_MONOTONIC
* Clock that cannot be set and represents monotonic time since some
* unspecified starting point.
*/
hrtime_t
gethrtime (void)
{
struct timespec tp;
hrtime_t rc = 0;
/*
* For er_kernel on Linux, we want to match how DTrace gets its timestamps.
* This is CLOCK_MONOTONIC_RAW. It might be changing to CLOCK_MONOTONIC.
* For now, we change to "RAW" and can change back if DTrace changes.
*
* The two can be different. Check the clock_gettime() man page.
* CLOCK_MONOTONIC_RAW is Linux-specific and introduced in 2.6.28.
* It is impervious to NTP or adjtime adjustments.
*
* We must match the timer used in perfan/libcollector/src/gethrtime.c.
*
* There is no issue on Solaris, where gethrtime() is provided by the kernel
* and used by DTrace.
*/
#ifdef CLOCK_MONOTONIC_RAW
int r = clock_gettime (CLOCK_MONOTONIC_RAW, &tp);
#else
int r = clock_gettime (CLOCK_MONOTONIC, &tp);
#endif
if (r == 0)
rc = ((hrtime_t) tp.tv_sec) * 1000000000 + (hrtime_t) tp.tv_nsec;
return rc;
}
|
