perf/x86: Support Retire Latency

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Retire Latency reports the number of elapsed core clocks between the
retirement of the instruction indicated by the Instruction Pointer field
of the PEBS record and the retirement of the prior instruction. It's
enumerated by the IA32_PERF_CAPABILITIES.PEBS_TIMING_INFO[17].

Add flag PMU_FL_RETIRE_LATENCY to indicate the availability of the
feature.

The Retire Latency is not supported by the fixed counter 0 on p-core of
MTL.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230104201349.1451191-3-kan.liang@linux.intel.com

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Kan Liang 2023-01-04 12:13:43 -08:00 • committed by Ingo Molnar

parent 38aaf921e9

commit c87a31093c

3 changed files with 37 additions and 1 deletions

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32

arch/x86/events/intel/core.c

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4

arch/x86/events/intel/ds.c

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2

arch/x86/events/perf_event.h

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