Manual Pages  — PMC.SOFT

pmc.soft – measurements using software based events

LIBRARY SYNOPSIS DESCRIPTION PMC Features Event Qualifiers SEE ALSO HISTORY AUTHORS

Performance Counters Library (libpmc, -lpmc)

#include <pmc.h>

Software events are used to collect various source of software events.

16 sampling counters using software events based on various sources. These PMCs support the following capabilities:

Capability	Support
PMC_CAP_CASCADE	amp;No
PMC_CAP_EDGE	amp;No
PMC_CAP_INTERRUPT	Yes
PMC_CAP_INVERT	amp;No
PMC_CAP_READ	Yes
PMC_CAP_PRECISE	amp;No
PMC_CAP_SYSTEM	Yes
PMC_CAP_TAGGING	amp;No
PMC_CAP_THRESHOLD	amp;No
PMC_CAP_USER	Yes
PMC_CAP_WRITE	Yes

There is no supported event qualifier.

The event specifiers supported by software are:

CLOCK.HARD
	Hard clock ticks.
CLOCK.STAT
	Stat clock ticks.
CLOCK.PROF
	Profiling clock ticks.
LOCK.FAILED
	Lock acquisition failed.
PAGE_FAULT.ALL
	All page fault type.
PAGE_FAULT.READ
	Read page fault.
PAGE_FAULT.WRITE
	Write page fault.

The pmc library first appeared in FreeBSD 6.0 .

The Performance Counters Library (libpmc, -lpmc)library was written by Joseph Koshy <Mt jkoshy@FreeBSD.org>. Software PMC was written by Fabien Thomas <Mt fabient@FreeBSD.org>.