/* $OpenBSD: hertz.c,v 1.6 2006/03/25 19:06:36 espie Exp $ */
/*
* Copyright (c) 2005 Artur Grabowski <art@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/sysctl.h>
#include "gprof.h"
/*
* Return the tick frequency on the machine or 0 if we can't find out.
*/
int
hertz(void)
{
struct clockinfo cinfo;
int mib[2];
size_t len;
mib[0] = CTL_KERN;
mib[1] = KERN_CLOCKRATE;
len = sizeof(cinfo);
if (sysctl(mib, 2, &cinfo, &len, NULL, 0) == -1)
return (0);
return (cinfo.hz);
}