linux-kernel - [PATCH v8 28/52] perf jevents: Add RAPL metrics for all Intel models

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Message-ID: <20251113032040.1994090-29-irogers@google.com>
Date: Wed, 12 Nov 2025 19:20:16 -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 28/52] perf jevents: Add RAPL metrics for all Intel models

Add a 'cpu_power' metric group that computes the power consumption
from RAPL events if they are present.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/pmu-events/intel_metrics.py | 44 ++++++++++++++++++++++++--
 1 file changed, 41 insertions(+), 3 deletions(-)

diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events/intel_metrics.py
index b287ef115193..61778deedfff 100755
--- a/tools/perf/pmu-events/intel_metrics.py
+++ b/tools/perf/pmu-events/intel_metrics.py
@@ -1,12 +1,48 @@
 #!/usr/bin/env python3
 # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
 import argparse
+import math
 import os
-from metric import (JsonEncodeMetric, JsonEncodeMetricGroupDescriptions, LoadEvents,
-                    MetricGroup)
+from metric import (d_ratio, has_event, Event, JsonEncodeMetric, JsonEncodeMetricGroupDescriptions,
+                    LoadEvents, Metric, MetricGroup, Select)
 
 # Global command line arguments.
 _args = None
+interval_sec = Event("duration_time")
+
+
+def Rapl() -> MetricGroup:
+    """Processor power consumption estimate.
+
+    Use events from the running average power limit (RAPL) driver.
+    """
+    # Watts = joules/second
+    pkg = Event("power/energy\\-pkg/")
+    cond_pkg = Select(pkg, has_event(pkg), math.nan)
+    cores = Event("power/energy\\-cores/")
+    cond_cores = Select(cores, has_event(cores), math.nan)
+    ram = Event("power/energy\\-ram/")
+    cond_ram = Select(ram, has_event(ram), math.nan)
+    gpu = Event("power/energy\\-gpu/")
+    cond_gpu = Select(gpu, has_event(gpu), math.nan)
+    psys = Event("power/energy\\-psys/")
+    cond_psys = Select(psys, has_event(psys), math.nan)
+    scale = 2.3283064365386962890625e-10
+    metrics = [
+        Metric("lpm_cpu_power_pkg", "",
+               d_ratio(cond_pkg * scale, interval_sec), "Watts"),
+        Metric("lpm_cpu_power_cores", "",
+               d_ratio(cond_cores * scale, interval_sec), "Watts"),
+        Metric("lpm_cpu_power_ram", "",
+               d_ratio(cond_ram * scale, interval_sec), "Watts"),
+        Metric("lpm_cpu_power_gpu", "",
+               d_ratio(cond_gpu * scale, interval_sec), "Watts"),
+        Metric("lpm_cpu_power_psys", "",
+               d_ratio(cond_psys * scale, interval_sec), "Watts"),
+    ]
+
+    return MetricGroup("lpm_cpu_power", metrics,
+                       description="Running Average Power Limit (RAPL) power consumption estimates")
 
 
 def main() -> None:
@@ -33,7 +69,9 @@ def main() -> None:
     directory = f"{_args.events_path}/x86/{_args.model}/"
     LoadEvents(directory)
 
-    all_metrics = MetricGroup("", [])
+    all_metrics = MetricGroup("", [
+        Rapl(),
+    ])
 
     if _args.metricgroups:
         print(JsonEncodeMetricGroupDescriptions(all_metrics))
-- 
2.51.2.1041.gc1ab5b90ca-goog