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	cpu.c - slstatus - status monitor
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	---
	cpu.c (3434B)
	---
	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_c…
	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 %L…
	33 &a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[…
	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])) / su…
	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] …
	97 (b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR] …
	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) …
	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…
	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] …
	146 (b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR] …
	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