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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 processors.

 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 architectures.

 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)