how to prevent process from being killed Post: 302588128

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LEARN ABOUT FREEBSD

pmccontrol

PMCCONTROL(8)						    BSD 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>

BSD
								 November 9, 2008							       BSD