From: Ian Rogers <irogers@google.com>
Date: Tue, 27 Jan 2026 18:44:34 +0000 (-0800)
Subject: perf jevents: Add RAPL event metric for AMD zen models
X-Git-Tag: v7.0-rc1~16^2~88
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d10ae3a935e7fdc2b149d81e617069fcde9864e3;p=thirdparty%2Flinux.git

perf jevents: Add RAPL event metric for AMD zen models

Add power per second metrics based on RAPL.

Reviewed-by: Sandipan Das <sandipan.das@amd.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Benjamin Gray <bgray@linux.ibm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Edward Baker <edward.baker@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Falcon <thomas.falcon@intel.com>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: Xu Yang <xu.yang_2@nxp.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---

diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index bc91d9c120fa..b6cdeb4f09fe 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -1,13 +1,36 @@
 #!/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 socket power consumption estimate.
+
+    Use events from the running average power limit (RAPL) driver.
+    """
+    # Watts = joules/second
+    # Currently only energy-pkg is supported by AMD:
+    # https://lore.kernel.org/lkml/20220105185659.643355-1-eranian@google.com/
+    pkg = Event("power/energy\\-pkg/")
+    cond_pkg = Select(pkg, has_event(pkg), math.nan)
+    scale = 2.3283064365386962890625e-10
+    metrics = [
+        Metric("lpm_cpu_power_pkg", "",
+               d_ratio(cond_pkg * scale, interval_sec), "Watts"),
+    ]
+
+    return MetricGroup("lpm_cpu_power", metrics,
+                       description="Processor socket power consumption estimates")
+
 
 def main() -> None:
     global _args
@@ -33,7 +56,9 @@ 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))