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128 lines
3.4 KiB
Groff
128 lines
3.4 KiB
Groff
.\" Copyright (c) 2003,2008 Joseph Koshy. 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 Joseph Koshy ``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 Joseph Koshy 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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.\" $FreeBSD$
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.\"
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.Dd November 9, 2008
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.Dt PMCCONTROL 8
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.Os
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.Sh NAME
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.Nm pmccontrol
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.Nd "control hardware performance monitoring counters"
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.Sh SYNOPSIS
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.Nm
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.Oo Fl c Ar cpu | Fl d Ar pmc | Fl e Ar pmc Oc ...
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.Nm
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.Fl l
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.Nm
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.Fl L
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.Nm
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.Fl s
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.Sh DESCRIPTION
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The
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.Nm
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utility controls the operation of the system's hardware performance
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monitoring counters.
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.Sh OPTIONS
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The
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.Nm
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utility processes options in command line order, so later options modify
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the effect of earlier ones.
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The following options are available:
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.Bl -tag -width indent
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.It Fl c Ar cpu
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Subsequent enable and disable options affect the CPU
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denoted by argument
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.Ar cpu .
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The argument
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.Ar cpu
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is a number denoting a CPU in the system, or
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.Dq Li * ,
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denoting all unhalted CPUs in the system.
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.It Fl d Ar pmc
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Disable PMC number
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.Ar pmc
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on the CPU specified by
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.Fl c ,
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preventing it from being used till subsequently re-enabled.
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The argument
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.Ar pmc
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is a number denoting a specific PMC, or
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.Dq Li *
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denoting all the PMCs on the specified CPU.
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.Pp
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Only idle PMCs may be disabled.
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.\" XXX this probably needs to be fixed.
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.It Fl e Ar pmc
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Enable PMC number
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.Ar pmc ,
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on the CPU specified by
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.Fl c ,
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allowing it to be used in the future.
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The argument
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.Ar pmc
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is a number denoting a specific PMC, or
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.Dq Li *
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denoting all the PMCs on the specified CPU.
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If PMC
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.Ar pmc
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is already enabled, this option has no effect.
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.It Fl l
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List available hardware performance counters and their current
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disposition.
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.It Fl L
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List available hardware performance counter classes and their
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supported event names.
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.It Fl s
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Print driver statistics maintained by
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.Xr hwpmc 4 .
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.El
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.Sh EXAMPLES
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To disable all PMCs on all CPUs, use the command:
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.Dl "pmccontrol -d*"
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.Pp
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To enable all PMCs on all CPUs, use:
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.Dl "pmccontrol -e*"
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.Pp
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To disable PMCs 0 and 1 on CPU 2, use:
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.Dl "pmccontrol -c2 -d0 -d1"
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.Pp
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To disable PMC 0 of CPU 0 only, and enable all other PMCS on all other
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CPUs, use:
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.Dl "pmccontrol -c* -e* -c0 -d0"
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.Sh DIAGNOSTICS
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.Ex -std
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.Sh SEE ALSO
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.Xr pmc 3 ,
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.Xr pmclog 3 ,
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.Xr hwpmc 4 ,
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.Xr pmcstat 8 ,
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.Xr sysctl 8
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Fx 6.0 .
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.Sh AUTHORS
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.An Joseph Koshy Aq Mt jkoshy@FreeBSD.org
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