1100844Sjake/*- 2100844Sjake * Copyright (c) 1996 Bruce D. Evans. 3100844Sjake * Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>. 4100844Sjake * All rights reserved. 5100844Sjake * 6100844Sjake * Redistribution and use in source and binary forms, with or without 7100844Sjake * modification, are permitted provided that the following conditions 8100844Sjake * are met: 9100844Sjake * 1. Redistributions of source code must retain the above copyright 10100844Sjake * notice, this list of conditions and the following disclaimer. 11100844Sjake * 2. Redistributions in binary form must reproduce the above copyright 12100844Sjake * notice, this list of conditions and the following disclaimer in the 13100844Sjake * documentation and/or other materials provided with the distribution. 14100844Sjake * 15100844Sjake * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16100844Sjake * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17100844Sjake * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18100844Sjake * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19100844Sjake * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20100844Sjake * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21100844Sjake * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22100844Sjake * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23100844Sjake * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24100844Sjake * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25100844Sjake * SUCH DAMAGE. 26100844Sjake * 27100844Sjake * from: src/sys/i386/isa/prof_machdep.c,v 1.16 2000/07/04 11:25:19 28100844Sjake */ 29100844Sjake 30181701Smarius#include <sys/cdefs.h> 31181701Smarius__FBSDID("$FreeBSD$"); 32181701Smarius 33100844Sjake#ifdef GUPROF 34100844Sjake 35100844Sjake#include <sys/param.h> 36100844Sjake#include <sys/systm.h> 37100844Sjake#include <sys/gmon.h> 38100844Sjake#include <sys/kernel.h> 39100844Sjake#include <sys/sysctl.h> 40100844Sjake 41100844Sjake#include <machine/profile.h> 42100844Sjake 43100844Sjakeint cputime_bias; 44100844Sjake 45100844Sjake/* 46100844Sjake * Return the time elapsed since the last call. The units are machine- 47100844Sjake * dependent. 48181701Smarius * XXX: this is not SMP-safe. It should use per-CPU variables; %tick can be 49100844Sjake * used though. 50100844Sjake */ 51100844Sjakeint 52100844Sjakecputime(void) 53100844Sjake{ 54100844Sjake u_long count; 55181701Smarius static u_long prev_count; 56100844Sjake int delta; 57100844Sjake 58100844Sjake count = rd(tick); 59100844Sjake delta = (int)(count - prev_count); 60100844Sjake prev_count = count; 61100844Sjake return (delta); 62100844Sjake} 63100844Sjake 64100844Sjake/* 65100844Sjake * The start and stop routines need not be here since we turn off profiling 66100844Sjake * before calling them. They are here for convenience. 67100844Sjake */ 68100844Sjakevoid 69100844Sjakestartguprof(struct gmonparam *gp) 70100844Sjake{ 71100844Sjake 72100844Sjake gp->profrate = tick_freq; 73100844Sjake cputime_bias = 0; 74100844Sjake cputime(); 75100844Sjake} 76100844Sjake 77100844Sjakevoid 78100844Sjakestopguprof(struct gmonparam *gp) 79100844Sjake{ 80181701Smarius 81100844Sjake /* Nothing to do. */ 82100844Sjake} 83100844Sjake 84100844Sjake#endif /* GUPROF */ 85