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| author | Ian Rogers <irogers@google.com> | 2021-11-11 03:21:09 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-11-14 00:11:50 +0300 |
| commit | 9aba0adae8c773ba0c0adc7c4d97768e044166cb (patch) | |
| tree | 9414bbbcaf3bdc041000f541c59ea4d01442e5e9 /tools/perf/tests/expr.c | |
| parent | 1e7ab82975995d2238db8d8bad64e3aed34cfa26 (diff) | |
| download | linux-9aba0adae8c773ba0c0adc7c4d97768e044166cb.tar.xz | |
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/tests/expr.c')
| -rw-r--r-- | tools/perf/tests/expr.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c index ed95ebda49a7..c895de481fe1 100644 --- a/tools/perf/tests/expr.c +++ b/tools/perf/tests/expr.c @@ -171,6 +171,18 @@ static int test__expr(struct test_suite *t __maybe_unused, int subtest __maybe_u TEST_ASSERT_VAL("#num_packages", expr__parse(&num_packages, ctx, "#num_packages") == 0); TEST_ASSERT_VAL("#num_dies >= #num_packages", num_dies >= num_packages); + /* + * Source count returns the number of events aggregating in a leader + * event including the leader. Check parsing yields an id. + */ + expr__ctx_clear(ctx); + TEST_ASSERT_VAL("source count", + expr__find_ids("source_count(EVENT1)", + NULL, ctx) == 0); + TEST_ASSERT_VAL("source count", hashmap__size(ctx->ids) == 1); + TEST_ASSERT_VAL("source count", hashmap__find(ctx->ids, "EVENT1", + (void **)&val_ptr)); + expr__ctx_free(ctx); return 0; |