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perf evsel: Reduce scanning core PMUs in is_hybrid

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evsel__is_hybrid returns true if there are multiple core PMUs and the
evsel is for a core PMU. Determining the number of core PMUs can
require loading/scanning PMUs. There's no point doing the scanning if
evsel for the is_hybrid test isn't core so reorder the tests to reduce
PMU scanning.

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20250201074320.746259-2-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Ian Rogers 2025-01-31 23:43:16 -08:00 committed by Namhyung Kim
parent 888751e4d0
commit 340c345e58
1 changed files with 2 additions and 2 deletions
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4
tools/perf/util/evsel.c
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@ -3866,10 +3866,10 @@ void evsel__zero_per_pkg(struct evsel *evsel)
*/
bool evsel__is_hybrid(const struct evsel *evsel)
{
if (perf_pmus__num_core_pmus() == 1)
if (!evsel->core.is_pmu_core)
return false;
return evsel->core.is_pmu_core;
return perf_pmus__num_core_pmus() > 1;
}
struct evsel *evsel__leader(const struct evsel *evsel)