]> www.infradead.org Git - users/jedix/linux-maple.git/commit
perf stat: Add command line option for enabling TPEBS recording
authorWeilin Wang <weilin.wang@intel.com>
Sat, 20 Jul 2024 06:20:59 +0000 (02:20 -0400)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Tue, 13 Aug 2024 18:25:32 +0000 (15:25 -0300)
commitd546e3acf3526eaf1d74902236c7219a424ac2e9
tree320c736e3540bebadfc33ece99ed2b7ec62a87cb
parent0a7381601b8a55d44c97ea132e23876c0dd9f90e
perf stat: Add command line option for enabling TPEBS recording

With this command line option, TPEBS recording is turned off in 'perf
stat' on default. It will only be turned on when this option is given in
'perf stat' command.

Example with --record-tpebs:

  perf stat -M tma_split_loads -C1-4 --record-tpebs sleep 1

  [ perf record: Woken up 2 times to write data ]
  [ perf record: Captured and wrote 0.044 MB - ]

   Performance counter stats for 'CPU(s) 1-4':

      53,259,156,071      cpu_core/TOPDOWN.SLOTS/          #      1.6 %  tma_split_loads   (50.00%)
      15,867,565,250      cpu_core/topdown-retiring/                                       (50.00%)
      15,655,580,731      cpu_core/topdown-mem-bound/                                      (50.00%)
      11,738,022,218      cpu_core/topdown-bad-spec/                                       (50.00%)
       6,151,265,424      cpu_core/topdown-fe-bound/                                       (50.00%)
      20,445,917,581      cpu_core/topdown-be-bound/                                       (50.00%)
       6,925,098,013      cpu_core/L1D_PEND_MISS.PENDING/                                  (50.00%)
       3,838,653,421      cpu_core/MEMORY_ACTIVITY.STALLS_L1D_MISS/                        (50.00%)
       4,797,059,783      cpu_core/EXE_ACTIVITY.BOUND_ON_LOADS/                            (50.00%)
      11,931,916,714      cpu_core/CPU_CLK_UNHALTED.THREAD/                                (50.00%)
         102,576,164      cpu_core/MEM_LOAD_COMPLETED.L1_MISS_ANY/                         (50.00%)
          64,071,854      cpu_core/MEM_INST_RETIRED.SPLIT_LOADS/                           (50.00%)
                   3      cpu_core/MEM_INST_RETIRED.SPLIT_LOADS/R

         1.003049679 seconds time elapsed

Example without --record-tpebs:

  perf stat -M tma_contested_accesses -C1 sleep 1

   Performance counter stats for 'CPU(s) 1':

          50,203,891      cpu_core/TOPDOWN.SLOTS/          #      0.0 %  tma_contested_accesses   (63.60%)
          10,040,777      cpu_core/topdown-retiring/                                              (63.60%)
           6,890,729      cpu_core/topdown-mem-bound/                                             (63.60%)
           2,756,463      cpu_core/topdown-bad-spec/                                              (63.60%)
          10,828,288      cpu_core/topdown-fe-bound/                                              (63.60%)
          28,350,432      cpu_core/topdown-be-bound/                                              (63.60%)
                  98      cpu_core/OCR.DEMAND_DATA_RD.L3_HIT.SNOOP_HITM/                          (63.70%)
             577,520      cpu_core/MEMORY_ACTIVITY.STALLS_L2_MISS/                                (54.62%)
             313,339      cpu_core/MEMORY_ACTIVITY.STALLS_L3_MISS/                                (54.62%)
              14,155      cpu_core/MEM_LOAD_RETIRED.L1_MISS/                                      (45.54%)
                   0      cpu_core/OCR.DEMAND_DATA_RD.L3_HIT.SNOOP_HIT_WITH_FWD/                  (36.30%)
           8,468,077      cpu_core/CPU_CLK_UNHALTED.THREAD/                                       (45.38%)
                 198      cpu_core/MEM_LOAD_L3_HIT_RETIRED.XSNP_MISS/                             (45.38%)
               8,324      cpu_core/MEM_LOAD_RETIRED.FB_HIT/                                       (45.38%)
       3,388,031,520      TSC
          23,226,785      cpu_core/CPU_CLK_UNHALTED.REF_TSC/                                      (54.46%)
                  80      cpu_core/MEM_LOAD_L3_HIT_RETIRED.XSNP_FWD/                              (54.46%)
                   0      cpu_core/MEM_LOAD_L3_HIT_RETIRED.XSNP_FWD/R
                   0      cpu_core/MEM_LOAD_L3_HIT_RETIRED.XSNP_MISS/R
       1,006,816,667 ns   duration_time

         1.002537737 seconds time elapsed

Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Weilin Wang <weilin.wang@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Samantha Alt <samantha.alt@intel.com>
Link: https://lore.kernel.org/r/20240720062102.444578-7-weilin.wang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/Documentation/perf-stat.txt
tools/perf/builtin-stat.c