perf parse-events: Warn when events are regrouped

Use if an event is reordered or the number of groups increases to
signal that regrouping has happened and warn about it. Disable the
warning in the case wild card PMU names are used and for metrics.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kim Phillips <kim.phillips@amd.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20230312021543.3060328-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 767ad1729228..46204c1a7916 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -26,13 +26,13 @@ int parse_events_option(const struct option *opt, const char *str, int unset);
 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset);
 __attribute__((nonnull(1, 2, 3)))
 int __parse_events(struct evlist *evlist, const char *str, struct parse_events_error *error,
-		   struct perf_pmu *fake_pmu);
+		   struct perf_pmu *fake_pmu, bool warn_if_reordered);
 
-__attribute__((nonnull))
+__attribute__((nonnull(1, 2, 3)))
 static inline int parse_events(struct evlist *evlist, const char *str,
 			       struct parse_events_error *err)
 {
-	return __parse_events(evlist, str, err, NULL);
+	return __parse_events(evlist, str, err, /*fake_pmu=*/NULL, /*warn_if_reordered=*/true);
 }
 
 int parse_event(struct evlist *evlist, const char *str);
@@ -128,6 +128,7 @@ struct parse_events_state {
 	int			   stoken;
 	struct perf_pmu		  *fake_pmu;
 	char			  *hybrid_pmu_name;
+	bool			   wild_card_pmus;
 };
 
 void parse_events__shrink_config_terms(void);