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author | Ian Rogers <irogers@google.com> | 2021-11-10 16:21:09 -0800 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-11-13 18:11:50 -0300 |
commit | 9aba0adae8c773ba0c0adc7c4d97768e044166cb (patch) | |
tree | 9414bbbcaf3bdc041000f541c59ea4d01442e5e9 /tools/perf/util/evsel.c | |
parent | 1e7ab82975995d2238db8d8bad64e3aed34cfa26 (diff) | |
download | linux-9aba0adae8c773ba0c0adc7c4d97768e044166cb.tar.bz2 |
perf expr: Add source_count for aggregating events
Events like uncore_imc/cas_count_read/ on Skylake open multiple events
and then aggregate in the metric leader. To determine the average value
per event the number of these events is needed. Add a source_count
function that returns this value by counting the number of events with
the given metric leader. For most events the value is 1 but for
uncore_imc/cas_count_read/ it can yield values like 6.
Add a generic test, but manually tested with a test metric that uses
the function.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul A . Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Song Liu <song@kernel.org>
Cc: Wan Jiabing <wanjiabing@vivo.com>
Cc: Yury Norov <yury.norov@gmail.com>
Link: https://lore.kernel.org/r/20211111002109.194172-9-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evsel.c')
-rw-r--r-- | tools/perf/util/evsel.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index ec967fb8d7d9..a59fb2ecb84e 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -3037,3 +3037,15 @@ void evsel__set_leader(struct evsel *evsel, struct evsel *leader) { evsel->core.leader = &leader->core; } + +int evsel__source_count(const struct evsel *evsel) +{ + struct evsel *pos; + int count = 0; + + evlist__for_each_entry(evsel->evlist, pos) { + if (pos->metric_leader == evsel) + count++; + } + return count; +} |