83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/*-
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* Copyright (c) 1996 Bruce D. Evans.
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* Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: src/sys/i386/isa/prof_machdep.c,v 1.16 2000/07/04 11:25:19
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*
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* $FreeBSD$
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*/
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#ifdef GUPROF
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/gmon.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <machine/profile.h>
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int cputime_bias;
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/*
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* Return the time elapsed since the last call. The units are machine-
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* dependent.
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* XXX: this is not SMP-safe. It should use per-CPU variables; %tick can be
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* used though.
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*/
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int
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cputime(void)
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{
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u_long count;
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int delta;
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static u_long prev_count;
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count = rd(tick);
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delta = (int)(count - prev_count);
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prev_count = count;
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return (delta);
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}
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/*
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* The start and stop routines need not be here since we turn off profiling
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* before calling them. They are here for convenience.
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*/
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void
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startguprof(struct gmonparam *gp)
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{
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gp->profrate = tick_freq;
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cputime_bias = 0;
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cputime();
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}
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void
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stopguprof(struct gmonparam *gp)
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{
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/* Nothing to do. */
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}
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#endif /* GUPROF */
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