perf stat,jevents: Introduce Default tags for the default mode

Introduce a new metricgroup, Default, to tag all the metric groups which
will be collected in the default mode.

Add a new field, DefaultMetricgroupName, in the JSON file to indicate
the real metric group name. It will be printed in the default output
to replace the event names.

There is nothing changed for the output format.

On SPR, both TopdownL1 and TopdownL2 are displayed in the default
output.

On ARM, Intel ICL and later platforms (before SPR), only TopdownL1 is
displayed in the default output.

Suggested-by: Stephane Eranian <eranian@google.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ahmad Yasin <ahmad.yasin@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230615135315.3662428-4-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
index 7ed258be1829..12e80bb7939b 100755
--- a/tools/perf/pmu-events/jevents.py
+++ b/tools/perf/pmu-events/jevents.py
@@ -54,8 +54,8 @@ _json_event_attributes = [
 # Attributes that are in pmu_metric rather than pmu_event.
 _json_metric_attributes = [
     'pmu', 'metric_name', 'metric_group', 'metric_expr', 'metric_threshold',
-    'desc', 'long_desc', 'unit', 'compat', 'metricgroup_no_group', 'aggr_mode',
-    'event_grouping'
+    'desc', 'long_desc', 'unit', 'compat', 'metricgroup_no_group',
+    'default_metricgroup_name', 'aggr_mode', 'event_grouping'
 ]
 # Attributes that are bools or enum int values, encoded as '0', '1',...
 _json_enum_attributes = ['aggr_mode', 'deprecated', 'event_grouping', 'perpkg']
@@ -307,6 +307,7 @@ class JsonEvent:
     self.metric_name = jd.get('MetricName')
     self.metric_group = jd.get('MetricGroup')
     self.metricgroup_no_group = jd.get('MetricgroupNoGroup')
+    self.default_metricgroup_name = jd.get('DefaultMetricgroupName')
     self.event_grouping = convert_metric_constraint(jd.get('MetricConstraint'))
     self.metric_expr = None
     if 'MetricExpr' in jd: