dockapps/wmcpuload/src/cpu_netbsd.c

67 lines
1.4 KiB
C
Raw Normal View History

/*
2014-10-05 15:29:59 +00:00
* cpu_netbsd - module to get cpu usage, for NetBSD
*
* This code is based on cpu_openbsd.c
*
* Copyright (c) 2001, 2002 Seiichi SATO <ssato@sh.rim.or.jp>
* Copyright (c) 2002 Thomas Runge <coto@core.de>
*
* 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/types.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/sched.h>
void
cpu_init(void)
{
/* You don't need initialization under NetBSD */
return;
}
/* Returns the current CPU usage in percent */
int
cpu_get_usage(cpu_options *opts)
{
int total, used, result, idle;
static int pre_total, pre_used, pre_idle;
int mib[] = { CTL_KERN, KERN_CP_TIME };
u_int64_t cpu_time[CPUSTATES];
size_t size = sizeof(cpu_time);
/* get cpu time via sysctl */
if (sysctl(mib, 2, &cpu_time, &size, NULL, 0) < 0)
return 0;
if (opts->ignore_nice) cpu_time[CP_NICE] = 0;
/* calculate usage */
used = cpu_time[CP_USER] + cpu_time[CP_SYS] +
cpu_time[CP_NICE] + cpu_time[CP_INTR];
total = used + cpu_time[CP_IDLE];
if ((pre_total == 0) || !(total - pre_total > 0)) {
result = 0;
} else {
result = 100 * (double)(used - pre_used) / (double)(total - pre_total);
}
/* save used/total for next calculation */
pre_used = used;
pre_total = total;
return result;
}