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perf list: Do not print 'Metric Groups:' unnecessarily
It was printed unconditionally even if nothing is printed. Check if the output list empty when filter is given. Before: $ ./perf list duration List of pre-defined events (to be used in -e): duration_time [Tool event] Metric Groups: After: $ ./perf list duration List of pre-defined events (to be used in -e): duration_time [Tool event] Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20200909055849.469612-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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1 changed files with 6 additions and 4 deletions
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@ -535,10 +535,12 @@ void metricgroup__print(bool metrics, bool metricgroups, char *filter,
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}
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}
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if (metricgroups && !raw)
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printf("\nMetric Groups:\n\n");
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else if (metrics && !raw)
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printf("\nMetrics:\n\n");
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if (!filter || !rblist__empty(&groups)) {
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if (metricgroups && !raw)
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printf("\nMetric Groups:\n\n");
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else if (metrics && !raw)
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printf("\nMetrics:\n\n");
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}
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for (node = rb_first_cached(&groups.entries); node; node = next) {
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struct mep *me = container_of(node, struct mep, nd);
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