66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
/*
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* cpu_openbsd - module to get cpu usage, for OpenBSD
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*
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* Copyright (C) 2001, 2002 Seiichi SATO <ssato@sh.rim.or.jp>
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*
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* Licensed under the GPL
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include "cpu.h"
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <sys/dkstat.h>
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void
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cpu_init(void)
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{
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/* You don't need initialization under OpenBSD */
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return;
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}
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/* Returns the current CPU usage in percent */
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int
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cpu_get_usage(cpu_options *opts)
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{
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int total, used, result;
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static int pre_total, pre_used;
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int mib[] = { CTL_KERN, KERN_CPTIME };
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unsigned long int cpu_time[CPUSTATES];
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size_t size = sizeof(cpu_time);
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/* get cpu time*/
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if (sysctl(mib, 2, &cpu_time, &size, NULL, 0) < 0)
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return 0;
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/* calc usage */
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used = cpu_time[CP_USER] + cpu_time[CP_SYS];
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if (!opts->ignore_nice) {
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used += cpu_time[CP_NICE];
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}
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total = used + cpu_time[CP_IDLE];
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if (pre_total == 0) {
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result = 0;
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} else if ((total - pre_total) > 0) {
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result = 100 * (double)(used - pre_used) / (double)(total - pre_total);
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} else {
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result = 0;
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}
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/* save used/total for next calculation */
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pre_used = used;
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pre_total = total;
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return result;
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}
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