linux-kernel - [PATCH v9 06/48] perf jevents: Allow metric groups not to be named

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Message-ID: <20251202175043.623597-7-irogers@google.com>
Date: Tue,  2 Dec 2025 09:50:01 -0800
From: Ian Rogers <irogers@...gle.com>
To: Adrian Hunter <adrian.hunter@...el.com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Benjamin Gray <bgray@...ux.ibm.com>, 
	Caleb Biggers <caleb.biggers@...el.com>, Edward Baker <edward.baker@...el.com>, 
	Ian Rogers <irogers@...gle.com>, Ingo Molnar <mingo@...hat.com>, 
	James Clark <james.clark@...aro.org>, Jing Zhang <renyu.zj@...ux.alibaba.com>, 
	Jiri Olsa <jolsa@...nel.org>, John Garry <john.g.garry@...cle.com>, Leo Yan <leo.yan@....com>, 
	Namhyung Kim <namhyung@...nel.org>, Perry Taylor <perry.taylor@...el.com>, 
	Peter Zijlstra <peterz@...radead.org>, Samantha Alt <samantha.alt@...el.com>, 
	Sandipan Das <sandipan.das@....com>, Thomas Falcon <thomas.falcon@...el.com>, 
	Weilin Wang <weilin.wang@...el.com>, Xu Yang <xu.yang_2@....com>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org
Subject: [PATCH v9 06/48] perf jevents: Allow metric groups not to be named

It can be convenient to have unnamed metric groups for the sake of
organizing other metrics and metric groups. An unspecified name
shouldn't contribute to the MetricGroup json value, so don't record
it.

Signed-off-by: Ian Rogers <irogers@...gle.com>
Tested-by: Thomas Falcon <thomas.falcon@...el.com>
---
 tools/perf/pmu-events/metric.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/pmu-events/metric.py b/tools/perf/pmu-events/metric.py
index 1de4fb72c75e..847b614d40d5 100644
--- a/tools/perf/pmu-events/metric.py
+++ b/tools/perf/pmu-events/metric.py
@@ -455,7 +455,8 @@ class Metric:
 
   def AddToMetricGroup(self, group):
     """Callback used when being added to a MetricGroup."""
-    self.groups.add(group.name)
+    if group.name:
+      self.groups.add(group.name)
 
   def Flatten(self) -> Set['Metric']:
     """Return a leaf metric."""
-- 
2.52.0.158.g65b55ccf14-goog