linux

iv/linux

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Ian Rogers e0f6eeefe4 perf vendor events: Update metrics for Ivybridge

Based on TMA_metrics-full.csv version 4.3 at 01.org:
    https://download.01.org/perfmon/
Events are still at version 21:
    https://download.01.org/perfmon/IVB
Json files generated by:
    https://github.com/intel/event-converter-for-linux-perf

Tested:

  ...
    6: Parse event definition strings                                  : Ok
    7: Simple expression parser                                        : Ok
  ...
    9: Parse perf pmu format                                           : Ok
   10: PMU events                                                      :
   10.1: PMU event table sanity                                        : Ok
   10.2: PMU event map aliases                                         : Ok
   10.3: Parsing of PMU event table metrics                            : Ok
   10.4: Parsing of PMU event table metrics with fake PMUs             : Ok
  ...
   68: Parse and process metrics                                       : Ok
  ...
   88: perf stat metrics (shadow stat) test                            : Ok
   89: perf all metricgroups test                                      : Ok
   90: perf all metrics test                                           : FAILED!
   91: perf all PMU test                                               : Ok
  ...

Test 90 failed for Load_Miss_Real_Latency with <not counted> events:

 Performance counter stats for 'perf bench internals synthesize':

     <not counted>      mem_load_uops_retired.hit_lfb                                     (0.00%)
     <not counted>      MEM_LOAD_UOPS_RETIRED.L1_MISS                                     (0.00%)
     <not counted>      L1D_PEND_MISS.PENDING                                         (0.00%)
         558185217 ns   duration_time

This is exposing a somewhat known issue with weak groups that can
be worked around with:

$ perf stat --metric-no-group -M Load_Miss_Real_Latency -a sleep 1

 Performance counter stats for 'system wide':

          14935022      mem_load_uops_retired.hit_lfb #    23.55 Load_Miss_Real_Latency   (83.23%)
           4716714      MEM_LOAD_UOPS_RETIRED.L1_MISS                                     (66.68%)
         462705675      L1D_PEND_MISS.PENDING                                         (83.22%)
        1001548340 ns   duration_time

       1.001548340 seconds time elapsed

Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Zhengjun Xing <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20220201015858.1226914-7-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2022-02-14 21:16:14 -03:00

arch

perf maps: Use a pointer for kmaps

2022-02-14 16:47:13 -03:00

bench

perf cpumap: Migrate to libperf cpumap api

2022-01-22 17:08:42 -03:00

dlfilters

perf dlfilter: Drop unused variable

2021-12-16 12:18:11 -03:00

Documentation

perf record: Extend --threads command line option