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authorJin Yao <yao.jin@linux.intel.com>2021-09-09 09:22:15 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2021-12-08 04:18:25 +0300
commite69dc84282fb474cb87097c6c945d8f90e05a4d9 (patch)
treee0c4a06cfec26952359989fe7f51ca0e638cc3c4 /tools/perf/Documentation
parented17b1914978eddb2b01f2d34577f1c82518c650 (diff)
downloadlinux-e69dc84282fb474cb87097c6c945d8f90e05a4d9.tar.xz
perf stat: Support --cputype option for hybrid events
In previous patch, we have supported the syntax which enables the event on a specified pmu, such as: cpu_core/<event>/ cpu_atom/<event>/ While this syntax is not very easy for applying on a set of events or applying on a group. In following example, we have to explicitly assign the pmu prefix. # ./perf stat -e '{cpu_core/cycles/,cpu_core/instructions/}' -- sleep 1 Performance counter stats for 'sleep 1': 1,158,545 cpu_core/cycles/ 1,003,113 cpu_core/instructions/ 1.002428712 seconds time elapsed A much easier way is: # ./perf stat --cputype core -e '{cycles,instructions}' -- sleep 1 Performance counter stats for 'sleep 1': 1,101,071 cpu_core/cycles/ 939,892 cpu_core/instructions/ 1.002363142 seconds time elapsed For this example, the '--cputype' enables the events from specified pmu (cpu_core). If '--cputype' conflicts with pmu prefix, '--cputype' is ignored. # ./perf stat --cputype core -e cycles,cpu_atom/instructions/ -a -- sleep 1 Performance counter stats for 'system wide': 21,003,407 cpu_core/cycles/ 367,886 cpu_atom/instructions/ 1.002203520 seconds time elapsed Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20210909062215.10278-1-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
-rw-r--r--tools/perf/Documentation/perf-stat.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index 604e6f2301ea..c06c341e72b9 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -495,6 +495,10 @@ This option can be enabled in perf config by setting the variable
$ perf config stat.no-csv-summary=true
+--cputype::
+Only enable events on applying cpu with this type for hybrid platform
+(e.g. core or atom)"
+
EXAMPLES
--------