108 lines
3.3 KiB
Groff
108 lines
3.3 KiB
Groff
.\" $NetBSD: pmc.1,v 1.7 2003/02/25 10:35:50 wiz Exp $
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.\"
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.\" Copyright (c) 2000 Zembu Labs, Inc.
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.\" All rights reserved.
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.\"
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.\" Author: Jason R. Thorpe <thorpej@zembu.com>
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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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Zembu Labs, Inc.
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.\" 4. Neither the name of Zembu Labs nor the names of its employees may
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.\" be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY ZEMBU LABS, INC. ``AS IS'' AND ANY EXPRESS
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.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WAR-
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.\" RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DIS-
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.\" CLAIMED. IN NO EVENT SHALL ZEMBU LABS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd October 24, 2000
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.Dt PMC 1
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.Os
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.Sh NAME
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.Nm pmc
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.Nd performance-monitoring counter interface for command execution
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.Sh SYNOPSIS
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.Nm
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.Fl h
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.Nm
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.Fl C
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.Nm
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.Fl c
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.Ar event
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.Ar command
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.Oo
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.Ar options
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.Ar ...
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.Oc
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.Sh DESCRIPTION
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.Nm
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is a means of using a processor's performance-monitoring counter (PMC)
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facility to measure various aspects of a program's execution.
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It is
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meant to be used in a fashion similar to
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.Xr time 1 .
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.Pp
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The arguments are as follows:
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.Bl -tag -width indent
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.It Fl h
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Display a list of performance counter events available on
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the system.
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.It Fl C
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Cancel any performance counters that are currently running.
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.It Fl c Ar event
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Count the event specified by
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.Ar event
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while running the command.
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.El
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.Sh DIAGNOSTICS
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.Bl -diag
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.It PMC support is not compiled into the kernel
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Performance-monitoring counter support has not been compiled into the
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kernel.
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It may be included using the
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.Em PERFCTRS
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option.
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See
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.Xr options 4
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for details.
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.It PMC counters are not supported by CPU
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Performance-monitoring counters are not available for the CPU.
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.El
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.Sh SEE ALSO
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.Xr time 1 ,
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.Xr options 4
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.Sh HISTORY
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The
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.Nm
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command first appeared in
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.Nx 1.6 .
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.Sh AUTHORS
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The
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.Nm
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command was written by
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.An Frank van der Linden Aq fvdl@wasabisystems.com .
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The kernel support for reading performance counters on the i386
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architecture was written by
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.An Jason R. Thorpe Aq thorpej@zembu.com .
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.Sh BUGS
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The
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.Nm
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command currently only supports performance-monitoring counters
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on the i386 architecture.
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