diff options
| author | Kan Liang <kan.liang@linux.intel.com> | 2023-01-04 12:13:43 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-01-09 12:22:07 +0100 |
| commit | c87a31093c707eb0b8c48aab89922c1d0bf4bd90 (patch) | |
| tree | dad1cab2dc58a09821615c7a091950886bda8cd1 /arch/x86/events/perf_event.h | |
| parent | 38aaf921e92dc5cf87e4a6c5a4b24dd99155cace (diff) | |
perf/x86: Support Retire Latency
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
Diffstat (limited to 'arch/x86/events/perf_event.h')
| -rw-r--r-- | arch/x86/events/perf_event.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index 1ac9d9e3c55c..d6de4487348c 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -608,6 +608,7 @@ union perf_capabilities { u64 pebs_baseline:1; u64 perf_metrics:1; u64 pebs_output_pt_available:1; + u64 pebs_timing_info:1; u64 anythread_deprecated:1; }; u64 capabilities; @@ -1003,6 +1004,7 @@ do { \ #define PMU_FL_PAIR 0x40 /* merge counters for large incr. events */ #define PMU_FL_INSTR_LATENCY 0x80 /* Support Instruction Latency in PEBS Memory Info Record */ #define PMU_FL_MEM_LOADS_AUX 0x100 /* Require an auxiliary event for the complete memory info */ +#define PMU_FL_RETIRE_LATENCY 0x200 /* Support Retire Latency in PEBS */ #define EVENT_VAR(_id) event_attr_##_id #define EVENT_PTR(_id) &event_attr_##_id.attr.attr |