dockapps/wmcpuload/src/cpu_bsdi.c

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