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PMC_START(3)	       FreeBSD Library Functions Manual		  PMC_START(3)

NAME
     pmc_start,	pmc_stop -- start and stop a PMC

LIBRARY
     Performance Counters Library (libpmc, -lpmc)

SYNOPSIS
     #include <pmc.h>

     int
     pmc_start(pmc_id_t	pmc);

     int
     pmc_stop(pmc_id_t pmc);

DESCRIPTION
     These functions are used to start and stop	a PMC.

     Function pmc_start() starts the PMC specified by argument pmc.  If	the
     specified PMC has process scope and has not been attached to any targets,
     it	will be	attached to the	current	process.

     Function pmc_stop() stops the PMC specified by argument pmc.

RETURN VALUES
     Upon successful completion, the value 0 is	returned; otherwise the
     value -1 is returned and the global variable errno	is set to indicate the
     error.

ERRORS
     A call to these functions may fail	with the following errors:

     [EDOOFUS]		Function pmc_start() specified a PMC that requires a
			log file and no	log file was configured.

     [EINVAL]		The specified PMC is in	the process of being deleted.

     [EINVAL]		Function pmc_stop() specified a	PMC that was never
			started.

     [ENXIO]		The specified PMC had system scope and its associated
			CPU was	disabled or absent.

SEE ALSO
     pmc(3), hwpmc(4)

FreeBSD	11.2		      September	22, 2008		  FreeBSD 11.2

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO

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