/* $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); }