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/*
* cpu_freebsd.c - module to get cpu usage, for DragonFly
*
* Copyright (c) 2007 Joerg Sonnenberger <joerg@leaf.dragonflybsd.org>
*
* Licensed under the GPL
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <kinfo.h>
#include "cpu.h"
void
cpu_init(void)
{
}
/* returns current CPU usage in percent */
int
cpu_get_usage(cpu_options *opts)
{
static uint64_t old_used, old_total;
uint64_t used, total;
struct kinfo_cputime cp_time;
int usage;
if (kinfo_get_sched_cputime(&cp_time) < 0)
return 0;
used = cp_time.cp_user + cp_time.cp_sys;
if (!opts->ignore_nice)
used += cp_time.cp_nice;
total = used + cp_time.cp_idle;
if (old_total == 0 || total == old_total)
usage = 0;
else
usage = 100 * (used - old_used + used / 2 - old_used / 2) / (total - old_total);
old_used = used;
old_total = total;
return usage;
}
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