components/cpu.c
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
/* See LICENSE file for copyright and license details. */
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "../util.h"
#if defined(__linux__)
const char *
cpu_freq(void)
{
uintmax_t freq;
/* in kHz */
if (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/"
"scaling_cur_freq", "%ju", &freq) != 1) {
return NULL;
}
return fmt_human(freq * 1000, 1000);
}
const char *
cpu_perc(void)
{
static long double a[7];
long double b[7];
memcpy(b, a, sizeof(b));
/* cpu user nice system idle iowait irq softirq */
if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf",
&a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[6])
!= 7) {
return NULL;
}
if (b[0] == 0) {
return NULL;
}
return bprintf("%d", (int)(100 *
((b[0] + b[1] + b[2] + b[5] + b[6]) -
(a[0] + a[1] + a[2] + a[5] + a[6])) /
((b[0] + b[1] + b[2] + b[3] + b[4] + b[5] +
b[6]) -
(a[0] + a[1] + a[2] + a[3] + a[4] + a[5] +
a[6]))));
}
#elif defined(__OpenBSD__)
#include <sys/param.h>
#include <sys/sched.h>
#include <sys/sysctl.h>
const char *
cpu_freq(void)
{
int mib[2];
uintmax_t freq;
size_t size;
mib[0] = CTL_HW;
mib[1] = HW_CPUSPEED;
size = sizeof(freq);
/* in MHz */
if (sysctl(mib, 2, &freq, &size, NULL, 0) < 0) {
warn("sysctl 'HW_CPUSPEED':");
return NULL;
}
return fmt_human(freq * 1E6, 1000);
}
const char *
cpu_perc(void)
{
int mib[2];
static uintmax_t a[CPUSTATES];
uintmax_t b[CPUSTATES];
size_t size;
mib[0] = CTL_KERN;
mib[1] = KERN_CPTIME;
size = sizeof(a);
memcpy(b, a, sizeof(b));
if (sysctl(mib, 2, &a, &size, NULL, 0) < 0) {
warn("sysctl 'KERN_CPTIME':");
return NULL;
}
if (b[0] == 0) {
return NULL;
}
return bprintf("%d", 100 *
((a[CP_USER] + a[CP_NICE] + a[CP_SYS] +
a[CP_INTR]) -
(b[CP_USER] + b[CP_NICE] + b[CP_SYS] +
b[CP_INTR])) /
((a[CP_USER] + a[CP_NICE] + a[CP_SYS] +
a[CP_INTR] + a[CP_IDLE]) -
(b[CP_USER] + b[CP_NICE] + b[CP_SYS] +
b[CP_INTR] + b[CP_IDLE])));
}
#elif defined(__FreeBSD__)
#include <sys/param.h>
#include <sys/sysctl.h>
#include <devstat.h>
const char *
cpu_freq(void)
{
int freq;
size_t size;
size = sizeof(freq);
/* in MHz */
if (sysctlbyname("hw.clockrate", &freq, &size, NULL, 0) == -1
|| !size) {
warn("sysctlbyname 'hw.clockrate':");
return NULL;
}
return fmt_human(freq * 1E6, 1000);
}
const char *
cpu_perc(void)
{
size_t size;
static long a[CPUSTATES];
long b[CPUSTATES];
size = sizeof(a);
memcpy(b, a, sizeof(b));
if (sysctlbyname("kern.cp_time", &a, &size, NULL, 0) == -1
|| !size) {
warn("sysctlbyname 'kern.cp_time':");
return NULL;
}
if (b[0] == 0) {
return NULL;
}
return bprintf("%d", 100 *
((a[CP_USER] + a[CP_NICE] + a[CP_SYS] +
a[CP_INTR]) -
(b[CP_USER] + b[CP_NICE] + b[CP_SYS] +
b[CP_INTR])) /
((a[CP_USER] + a[CP_NICE] + a[CP_SYS] +
a[CP_INTR] + a[CP_IDLE]) -
(b[CP_USER] + b[CP_NICE] + b[CP_SYS] +
b[CP_INTR] + b[CP_IDLE])));
}
#endif