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100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include "../util.h"
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#if defined(__linux__)
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const char *
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cpu_freq(void)
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{
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int freq;
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return (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq",
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"%i", &freq) == 1) ?
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bprintf("%d", (freq + 500) / 1000) : NULL;
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}
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const char *
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cpu_perc(void)
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{
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static int valid;
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static long double a[7];
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long double b[7];
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memcpy(b, a, sizeof(b));
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/* cpu user nice system idle iowait irq softirq */
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if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf",
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&a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[6]) != 7) {
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return NULL;
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}
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if (!valid) {
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valid = 1;
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return NULL;
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}
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return bprintf("%d", 100 *
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((b[0] + b[1] + b[2] + b[5] + b[6]) -
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(a[0] + a[1] + a[2] + a[5] + a[6])) /
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((b[0] + b[1] + b[2] + b[3] + b[4] + b[5] + b[6]) -
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(a[0] + a[1] + a[2] + a[3] + a[4] + a[5] + a[6])));
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}
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#elif defined(__OpenBSD__)
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#include <sys/param.h>
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#include <sys/sched.h>
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#include <sys/sysctl.h>
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const char *
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cpu_freq(void)
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{
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int freq, mib[2];
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size_t size;
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mib[0] = CTL_HW;
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mib[1] = HW_CPUSPEED;
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size = sizeof(freq);
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if (sysctl(mib, 2, &freq, &size, NULL, 0) < 0) {
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fprintf(stderr, "sysctl 'HW_CPUSPEED': %s\n", strerror(errno));
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return NULL;
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}
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return bprintf("%d", freq);
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}
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const char *
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cpu_perc(void)
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{
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int mib[2];
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static int valid;
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static long int a[CPUSTATES];
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long int b[CPUSTATES];
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size_t size;
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mib[0] = CTL_KERN;
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mib[1] = KERN_CPTIME;
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size = sizeof(a);
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memcpy(b, a, sizeof(b));
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if (sysctl(mib, 2, &a, &size, NULL, 0) < 0) {
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fprintf(stderr, "sysctl 'KERN_CPTIME': %s\n", strerror(errno));
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return NULL;
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}
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if (!valid) {
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valid = 1;
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return NULL;
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}
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return bprintf("%d", 100 *
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((a[CP_USER] + a[CP_NICE] + a[CP_SYS] + a[CP_INTR]) -
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(b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR])) /
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((a[CP_USER] + a[CP_NICE] + a[CP_SYS] + a[CP_INTR] +
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a[CP_IDLE]) -
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(b[CP_USER] + b[CP_NICE] + b[CP_SYS] + b[CP_INTR] +
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b[CP_IDLE])));
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}
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#endif
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