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PMCCONTROL(8)		FreeBSD	System Manager's Manual		 PMCCONTROL(8)

NAME
     pmccontrol	-- control hardware performance	monitoring counters

SYNOPSIS
     pmccontrol	[-c cpu	| -d pmc | -e pmc] ...
     pmccontrol	-l
     pmccontrol	-L
     pmccontrol	-s

DESCRIPTION
     The pmccontrol utility controls the operation of the system's hardware
     performance monitoring counters.

OPTIONS
     The pmccontrol utility processes options in command line order, so	later
     options modify the	effect of earlier ones.	 The following options are
     available:

     -c	cpu  Subsequent	enable and disable options affect the CPU denoted by
	     argument cpu.  The	argument cpu is	a number denoting a CPU	in the
	     system, or	``*'', denoting	all unhalted CPUs in the system.

     -d	pmc  Disable PMC number	pmc on the CPU specified by -c,	preventing it
	     from being	used till subsequently re-enabled.  The	argument pmc
	     is	a number denoting a specific PMC, or ``*'' denoting all	the
	     PMCs on the specified CPU.

	     Only idle PMCs may	be disabled.

     -e	pmc  Enable PMC	number pmc, on the CPU specified by -c,	allowing it to
	     be	used in	the future.  The argument pmc is a number denoting a
	     specific PMC, or ``*'' denoting all the PMCs on the specified
	     CPU.  If PMC pmc is already enabled, this option has no effect.

     -l	     List available hardware performance counters and their current
	     disposition.

     -L	     List available hardware performance counter classes and their
	     supported event names.

     -s	     Print driver statistics maintained	by hwpmc(4).

EXAMPLES
     To	disable	all PMCs on all	CPUs, use the command:
	   pmccontrol -d*

     To	enable all PMCs	on all CPUs, use:
	   pmccontrol -e*

     To	disable	PMCs 0 and 1 on	CPU 2, use:
	   pmccontrol -c2 -d0 -d1

     To	disable	PMC 0 of CPU 0 only, and enable	all other PMCS on all other
     CPUs, use:
	   pmccontrol -c* -e* -c0 -d0

DIAGNOSTICS
     The pmccontrol utility exits 0 on success,	and >0 if an error occurs.

SEE ALSO
     pmc(3), pmclog(3),	hwpmc(4), pmcstat(8), sysctl(8)

HISTORY
     The pmccontrol utility first appeared in FreeBSD 6.0.

AUTHORS
     Joseph Koshy <jkoshy@FreeBSD.org>

FreeBSD	10.1		       November	9, 2008			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | DIAGNOSTICS | SEE ALSO | HISTORY | AUTHORS

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<http://www.freebsd.org/cgi/man.cgi?query=pmccontrol&sektion=8&manpath=FreeBSD+7.4-RELEASE>

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