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- /* See LICENSE file for copyright and license details. */
- #include <errno.h>
- #include <stdio.h>
- #include <string.h>
-
- #include "../util.h"
-
- #if defined(__linux__)
- const char *
- cpu_freq(void)
- {
- int freq;
-
- return (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq",
- "%i", &freq) == 1) ?
- bprintf("%d", (freq + 500) / 1000) : NULL;
- }
-
- const char *
- cpu_perc(void)
- {
- static int valid;
- 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 (!valid) {
- valid = 1;
- 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 freq, mib[2];
- size_t size;
-
- mib[0] = CTL_HW;
- mib[1] = HW_CPUSPEED;
-
- size = sizeof(freq);
-
- if (sysctl(mib, 2, &freq, &size, NULL, 0) < 0) {
- fprintf(stderr, "sysctl 'HW_CPUSPEED': %s\n", strerror(errno));
- return NULL;
- }
-
- return bprintf("%d", freq);
- }
-
- const char *
- cpu_perc(void)
- {
- int mib[2];
- static int valid;
- static long int a[CPUSTATES];
- long int 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) {
- fprintf(stderr, "sysctl 'KERN_CPTIME': %s\n", strerror(errno));
- return NULL;
- }
- if (!valid) {
- valid = 1;
- 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
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