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$FreeBSD$
.Dd September 22, 2008 .Dt PMC_START 3 .Os .Sh NAME .Nm pmc_start , .Nm pmc_stop .Nd start and stop a PMC .Sh LIBRARY .Lb libpmc .Sh SYNOPSIS n pmc.h .Ft int .Fn pmc_start "pmc_id_t pmc" .Ft int .Fn pmc_stop "pmc_id_t pmc" .Sh DESCRIPTION These functions are used to start and stop a PMC.
p Function .Fn pmc_start starts the PMC specified by argument .Fa pmc . If the specified PMC has process scope and has not been attached to any targets, it will be attached to the current process.
p Function .Fn pmc_stop stops the PMC specified by argument .Fa pmc . .Sh RETURN VALUES .Rv -std .Sh ERRORS A call to these functions may fail with the following errors: l -tag -width Er t Bq Er EDOOFUS Function .Fn pmc_start specified a PMC that requires a log file and no log file was configured. t Bq Er EINVAL The specified PMC is in the process of being deleted. t Bq Er EINVAL Function .Fn pmc_stop specified a PMC that was never started. t Bq Er ENXIO The specified PMC had system scope and its associated CPU was disabled or absent. .El .Sh SEE ALSO .Xr pmc 3 , .Xr hwpmc 4