linux-kernel - [PATCH v8 09/52] perf jevents: Add threshold expressions to Metric

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Message-ID: <20251113032040.1994090-10-irogers@google.com>
Date: Wed, 12 Nov 2025 19:19:57 -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 v8 09/52] perf jevents: Add threshold expressions to Metric

Allow threshold expressions for metrics to be generated.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/pmu-events/metric.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/pmu-events/metric.py b/tools/perf/pmu-events/metric.py
index 0f4e67e5cfea..e81fed2e29b5 100644
--- a/tools/perf/pmu-events/metric.py
+++ b/tools/perf/pmu-events/metric.py
@@ -430,13 +430,15 @@ class Metric:
   expr: Expression
   scale_unit: str
   constraint: MetricConstraint
+  threshold: Optional[Expression]
 
   def __init__(self,
                name: str,
                description: str,
                expr: Expression,
                scale_unit: str,
-               constraint: MetricConstraint = MetricConstraint.GROUPED_EVENTS):
+               constraint: MetricConstraint = MetricConstraint.GROUPED_EVENTS,
+               threshold: Optional[Expression] = None):
     self.name = name
     self.description = description
     self.expr = expr.Simplify()
@@ -447,6 +449,7 @@ class Metric:
     else:
       self.scale_unit = f'1{scale_unit}'
     self.constraint = constraint
+    self.threshold = threshold
     self.groups = set()
 
   def __lt__(self, other):
@@ -473,6 +476,8 @@ class Metric:
     }
     if self.constraint != MetricConstraint.GROUPED_EVENTS:
       result['MetricConstraint'] = self.constraint.name
+    if self.threshold:
+      result['MetricThreshold'] = self.threshold.ToPerfJson()
 
     return result
 
-- 
2.51.2.1041.gc1ab5b90ca-goog