Difference between revisions of "Plugin:Intel PMU"

Revision as of 11:07, 16 June 2020

The intel_pmu plugin collects information provided by Linux perf interface which provides rich generalized abstractions over hardware specific capabilities. All events are reported on a per core basis.

Performance counters are CPU hardware registers that count hardware events such as instructions executed, cache-misses suffered, or branches mispredicted. They form a basis for profiling applications to trace dynamic control flow and identify hotspots.

For a full description of available options please refer to the collectd.conf(5) manual page.

Synopsis

→ See: Plugin:Intel_PMU/Config

<Plugin intel_pmu>
   ReportHardwareCacheEvents true
   ReportKernelPMUEvents true
   ReportSoftwareEvents true
   EventList "/var/cache/pmu/GenuineIntel-6-2D-core.json"
   HardwareEvents "L2_RQSTS.CODE_RD_HIT,L2_RQSTS.CODE_RD_MISS" "L2_RQSTS.ALL_CODE_RD"
   Cores "0" "1,35" "[12-17]"
   DispatchMultiPmu false
 </Plugin>

For a full description of available options please refer to the collectd.conf(5) manual page.

Example graph

Instructions (counter) corresponding to perf metric PERF_COUNT_HW_INSTRUCTIONS.

History

• Cores option is available since release 5.8.1.
• Support for uncore multi pmu was added in 5.11

Dependencies

• jevents

See also

• Plugin:Intel_PMU/tests
• PMU plugin high level design document