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 num-
       ber 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)



IBM                                                                                                          TAPSET::PERF(3stap)