TAPSET::PERF(3stap)													       TAPSET::PERF(3stap)

NAME

       tapset::perf - systemtap perf probe points

DESCRIPTION

       This  family  of probe points is used to probe "perf events" on suitably configured kernels (2.6.33+).  It contains a number of aliases for
       the ABI-specified event type/config tuples.

       The default sampling interval of the translator(1000000) is not overridden, so some of these probe points may fire very infrequently.  Use
       the lower level perf.type(AA).config(BB).sample(CC) probe point if this is a problem.

       perf.hw.*
	      A  variety of hardware events, as generalized by the kernel.  These generally require running on bare hardware with selected proces-
	      sors.
	      probe perf.hw.cpu_cycles
	      probe perf.hw.instructions
	      probe perf.hw.cache_references
	      probe perf.hw.cache_misses
	      probe perf.hw.branch_instructions
	      probe perf.hw.branch_misses
	      probe perf.hw.bus_cycles

       perf.sw.*
	      Special "software" events provided by the kernel.  These sometimes work in virtualized environments and with more  processor  archi-
	      tectures.
	      probe perf.sw.cpu_clock
	      probe perf.sw.task_clock
	      probe perf.sw.page_faults
	      probe perf.sw.context_switches
	      probe perf.sw.cpu_migrations
	      probe perf.sw.page_faults_min
	      probe perf.sw.page_faults_maj
	      probe perf.sw.alignment_faults
	      probe perf.sw.emulation_faults

       perf.hw_cache.TYPE.ACCESS.RESULT
	      Hardware cache events, where available.  A subset of the following cartesian product may be available:
	      probe perf.hw_cache.l1d.*.*
	      probe perf.hw_cache.l1i.*.*
	      probe perf.hw_cache.ll.*.*
	      probe perf.hw_cache.dtlb.*.*
	      probe perf.hw_cache.itlb.*.*
	      probe perf.hw_cache.bpu.*.*

	      probe perf.hw_cache.*.read.*
	      probe perf.hw_cache.*.write.*
	      probe perf.hw_cache.*.prefetch.*

	      probe perf.hw_cache.*.*.access
	      probe perf.hw_cache.*.*.miss

SEE ALSO

       stap(1), stapprobes(3stap)

IBM
															       TAPSET::PERF(3stap)