perf metric: Fix metric_leader
Multiple events may have a metric_leader to aggregate into. This happens for uncore events where, for example, uncore_imc is expanded into uncore_imc_0, uncore_imc_1, etc. Such events all have the same metric_id and should aggregate into the first event. The change introducing metric_ids had a bug where the metric_id was compared to itself, creating an always true condition. Correct this by comparing the event in the metric_evlist and the metric_leader. Fixes: ec5c5b3d ("perf metric: Encode and use metric-id as qualifier") Signed-off-by: Ian Rogers <irogers@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: John Garry <john.garry@huawei.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20220115062852.1959424-1-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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