[PATCH v2 01/12] perf jevents: Add RAPL event metric for AMD zen models

[Ian Rogers]

Add power per second metrics based on RAPL.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/perf/pmu-events/amd_metrics.py | 30 ++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index 227f9b98c016..4016ecee6464 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -1,9 +1,10 @@
 #!/usr/bin/env python3
 # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
-from metric import (JsonEncodeMetric, JsonEncodeMetricGroupDescriptions, LoadEvents,
-                    MetricGroup)
+from metric import (d_ratio, has_event, Event, JsonEncodeMetric, JsonEncodeMetricGroupDescriptions,
+                    LoadEvents, Metric, MetricGroup, Select)
 import argparse
 import json
+import math
 import os
 
 parser = argparse.ArgumentParser(description="AMD perf json generator")
@@ -16,6 +17,31 @@ LoadEvents(directory)
 
 all_metrics = MetricGroup("",[])
 
+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@xxxxxxxxxx/
+  pkg = Event("power/energy\-pkg/")
+  cond_pkg = Select(pkg, has_event(pkg), math.nan)
+  scale = 2.3283064365386962890625e-10
+  metrics = [
+      Metric("cpu_power_pkg", "",
+             d_ratio(cond_pkg * scale, interval_sec), "Watts"),
+  ]
+
+  return MetricGroup("cpu_power", metrics,
+                     description="Processor socket power consumption estimates")
+
+all_metrics = MetricGroup("", [
+    Rapl(),
+])
+
 if args.metricgroups:
   print(JsonEncodeMetricGroupDescriptions(all_metrics))
 else:
-- 
2.44.0.278.ge034bb2e1d-goog