cpu_perc: Port to OpenBSD
In OpenBSD the CPU usage in percent is now computed using KERN_CPTIME sysctl.
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README
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README
@ -62,5 +62,5 @@ Porting to OpenBSD is the current goal before thinking about a release.
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The following functions are not portable at the moment:
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- wifi_{perc,essid}
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- cpu_{perc,iowait}
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- cpu_iowait
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- entropy
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@ -68,6 +68,8 @@
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return bprintf("%d", perc);
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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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@ -89,4 +91,37 @@
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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], perc;
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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) == -1) {
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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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perc = 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]+a[CP_IDLE]) -
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(b[CP_USER]+b[CP_NICE]+b[CP_SYS]+b[CP_INTR]+b[CP_IDLE]));
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return bprintf("%d", perc);
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}
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#endif
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