1/*- 2 * Copyright (c) 1996 Bruce D. Evans. 3 * Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * from: src/sys/i386/isa/prof_machdep.c,v 1.16 2000/07/04 11:25:19 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD$"); 32 33#ifdef GUPROF 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/gmon.h> 38#include <sys/kernel.h> 39#include <sys/sysctl.h> 40 41#include <machine/profile.h> 42 43int cputime_bias; 44 45/* 46 * Return the time elapsed since the last call. The units are machine- 47 * dependent. 48 * XXX: this is not SMP-safe. It should use per-CPU variables; %tick can be 49 * used though. 50 */ 51int 52cputime(void) 53{ 54 u_long count; 55 static u_long prev_count; 56 int delta; 57 58 count = rd(tick); 59 delta = (int)(count - prev_count); 60 prev_count = count; 61 return (delta); 62} 63 64/* 65 * The start and stop routines need not be here since we turn off profiling 66 * before calling them. They are here for convenience. 67 */ 68void 69startguprof(struct gmonparam *gp) 70{ 71 72 gp->profrate = tick_freq; 73 cputime_bias = 0; 74 cputime(); 75} 76 77void 78stopguprof(struct gmonparam *gp) 79{ 80 81 /* Nothing to do. */ 82} 83 84#endif /* GUPROF */ 85