cpu.c - slstatus - status monitor
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cpu.c (3434B)
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1 /* See LICENSE file for copyright and license details. */
2 #include <stdint.h>
3 #include <stdio.h>
4 #include <string.h>
5
6 #include "../slstatus.h"
7 #include "../util.h"
8
9 #if defined(__linux__)
10 #define CPU_FREQ "/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq"
11
12 const char *
13 cpu_freq(const char *unused)
14 {
15 uintmax_t freq;
16
17 /* in kHz */
18 if (pscanf(CPU_FREQ, "%ju", &freq) != 1)
19 return NULL;
20
21 return fmt_human(freq * 1000, 1000);
22 }
23
24 const char *
25 cpu_perc(const char *unused)
26 {
27 static long double a[7];
28 long double b[7], sum;
29
30 memcpy(b, a, sizeof(b));
31 /* cpu user nice system idle iowait irq softirq */
32 if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf",
33 &a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[6])
34 != 7)
35 return NULL;
36
37 if (b[0] == 0)
38 return NULL;
39
40 sum = (b[0] + b[1] + b[2] + b[3] + b[4] + b[5] + b[6]) -
41 (a[0] + a[1] + a[2] + a[3] + a[4] + a[5] + a[6]);
42
43 if (sum == 0)
44 return NULL;
45
46 return bprintf("%d", (int)(100 *
47 ((b[0] + b[1] + b[2] + b[5] + b[6]) -
48 (a[0] + a[1] + a[2] + a[5] + a[6])) / sum));
49 }
50 #elif defined(__OpenBSD__)
51 #include <sys/param.h>
52 #include <sys/sched.h>
53 #include <sys/sysctl.h>
54
55 const char *
56 cpu_freq(const char *unused)
57 {
58 int freq, mib[2];
59 size_t size;
60
61 mib[0] = CTL_HW;
62 mib[1] = HW_CPUSPEED;
63
64 size = sizeof(freq);
65
66 /* in MHz */
67 if (sysctl(mib, 2, &freq, &size, NULL, 0) < 0) {
68 warn("sysctl 'HW_CPUSPEED':");
69 return NULL;
70 }
71
72 return fmt_human(freq * 1E6, 1000);
73 }
74
75 const char *
76 cpu_perc(const char *unused)
77 {
78 int mib[2];
79 static uintmax_t a[CPUSTATES];
80 uintmax_t b[CPUSTATES], sum;
81 size_t size;
82
83 mib[0] = CTL_KERN;
84 mib[1] = KERN_CPTIME;
85
86 size = sizeof(a);
87
88 memcpy(b, a, sizeof(b));
89 if (sysctl(mib, 2, &a, &size, NULL, 0) < 0) {
90 warn("sysctl 'KERN_CPTIME':");
91 return NULL;
92 }
93 if (b[0] == 0)
94 return NULL;
95
96 sum = (a[CP_USER] + a[CP_NICE] + a[CP_SYS] + a[CP_INTR] + a[CP_IDLE]) -
97 (b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR] + b[CP_IDLE]);
98
99 if (sum == 0)
100 return NULL;
101
102 return bprintf("%d", 100 *
103 ((a[CP_USER] + a[CP_NICE] + a[CP_SYS] +
104 a[CP_INTR]) -
105 (b[CP_USER] + b[CP_NICE] + b[CP_SYS] +
106 b[CP_INTR])) / sum);
107 }
108 #elif defined(__FreeBSD__)
109 #include <devstat.h>
110 #include <sys/param.h>
111 #include <sys/sysctl.h>
112
113 const char *
114 cpu_freq(const char *unused)
115 {
116 int freq;
117 size_t size;
118
119 size = sizeof(freq);
120 /* in MHz */
121 if (sysctlbyname("hw.clockrate", &freq, &size, NULL, 0) < 0 || !size) {
122 warn("sysctlbyname 'hw.clockrate':");
123 return NULL;
124 }
125
126 return fmt_human(freq * 1E6, 1000);
127 }
128
129 const char *
130 cpu_perc(const char *unused)
131 {
132 size_t size;
133 static long a[CPUSTATES];
134 long b[CPUSTATES], sum;
135
136 size = sizeof(a);
137 memcpy(b, a, sizeof(b));
138 if (sysctlbyname("kern.cp_time", &a, &size, NULL, 0) < 0 || !size) {
139 warn("sysctlbyname 'kern.cp_time':");
140 return NULL;
141 }
142 if (b[0] == 0)
143 return NULL;
144
145 sum = (a[CP_USER] + a[CP_NICE] + a[CP_SYS] + a[CP_INTR] + a[CP_IDLE]) -
146 (b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR] + b[CP_IDLE]);
147
148 if (sum == 0)
149 return NULL;
150
151 return bprintf("%d", 100 *
152 ((a[CP_USER] + a[CP_NICE] + a[CP_SYS] +
153 a[CP_INTR]) -
154 (b[CP_USER] + b[CP_NICE] + b[CP_SYS] +
155 b[CP_INTR])) / sum);
156 }
157 #endif