linux-kernel - [PATCH v1 33/51] perf jevent: Parse metric thresholds

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Message-Id: <20230219092848.639226-34-irogers@google.com>
Date:   Sun, 19 Feb 2023 01:28:30 -0800
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        Sandipan Das <sandipan.das@....com>,
        James Clark <james.clark@....com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        John Garry <john.g.garry@...cle.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Eduard Zingerman <eddyz87@...il.com>,
        Suzuki Poulouse <suzuki.poulose@....com>,
        Leo Yan <leo.yan@...aro.org>,
        Florian Fischer <florian.fischer@...q.space>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Jing Zhang <renyu.zj@...ux.alibaba.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org,
        Perry Taylor <perry.taylor@...el.com>,
        Caleb Biggers <caleb.biggers@...el.com>
Cc:     Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH v1 33/51] perf jevent: Parse metric thresholds

Parse the metric threshold and add to the pmu-events.c file. The
metric isn't parsed as the parser uses python's parser and will break
the operator precedence.

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

diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
index e82dff3a1228..40b9e626fc15 100755
--- a/tools/perf/pmu-events/jevents.py
+++ b/tools/perf/pmu-events/jevents.py
@@ -51,7 +51,7 @@ _json_event_attributes = [
 
 # Attributes that are in pmu_metric rather than pmu_event.
 _json_metric_attributes = [
-    'metric_name', 'metric_group', 'metric_expr', 'desc',
+    'metric_name', 'metric_group', 'metric_expr', 'metric_threshold', 'desc',
     'long_desc', 'unit', 'compat', 'aggr_mode', 'event_grouping'
 ]
 # Attributes that are bools or enum int values, encoded as '0', '1',...
@@ -306,6 +306,9 @@ class JsonEvent:
     self.metric_expr = None
     if 'MetricExpr' in jd:
       self.metric_expr = metric.ParsePerfJson(jd['MetricExpr']).Simplify()
+    # Note, the metric formula for the threshold isn't parsed as the &
+    # and > have incorrect precedence.
+    self.metric_threshold = jd.get('MetricThreshold')
 
     arch_std = jd.get('ArchStdEvent')
     if precise and self.desc and '(Precise Event)' not in self.desc:
@@ -362,6 +365,8 @@ class JsonEvent:
         # Convert parsed metric expressions into a string. Slashes
         # must be doubled in the file.
         x = x.ToPerfJson().replace('\\', '\\\\')
+      if metric and x and attr == 'metric_threshold':
+        x = x.replace('\\', '\\\\')
       if attr in _json_enum_attributes:
         s += x if x else '0'
       else:
diff --git a/tools/perf/pmu-events/pmu-events.h b/tools/perf/pmu-events/pmu-events.h
index 57a38e3e5c32..b7dff8f1021f 100644
--- a/tools/perf/pmu-events/pmu-events.h
+++ b/tools/perf/pmu-events/pmu-events.h
@@ -54,6 +54,7 @@ struct pmu_metric {
 	const char *metric_name;
 	const char *metric_group;
 	const char *metric_expr;
+	const char *metric_threshold;
 	const char *unit;
 	const char *compat;
 	const char *desc;
-- 
2.39.2.637.g21b0678d19-goog