linux-kernel - [PATCH v3 2/2] perf jevents: Add cycles breakdown metric for arm64/AMD/Intel

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Date: Wed, 13 Mar 2024 22:58:01 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	John Garry <john.g.garry@...cle.com>, Kan Liang <kan.liang@...ux.intel.com>, 
	Jing Zhang <renyu.zj@...ux.alibaba.com>, Thomas Richter <tmricht@...ux.ibm.com>, 
	James Clark <james.clark@....com>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org, Stephane Eranian <eranian@...gle.com>
Subject: [PATCH v3 2/2] perf jevents: Add cycles breakdown metric for arm64/AMD/Intel

Breakdown cycles to user, kernel and guest. Add a common_metrics.py
file for such metrics.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/pmu-events/amd_metrics.py    |  3 +++
 tools/perf/pmu-events/arm64_metrics.py  |  2 ++
 tools/perf/pmu-events/common_metrics.py | 18 ++++++++++++++++++
 tools/perf/pmu-events/intel_metrics.py  |  2 ++
 4 files changed, 25 insertions(+)
 create mode 100644 tools/perf/pmu-events/common_metrics.py

diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index bc70743c2f11..f14f65ccea2f 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -4,6 +4,7 @@ from metric import (d_ratio, has_event, max, Event, JsonEncodeMetric,
                     JsonEncodeMetricGroupDescriptions, Literal, LoadEvents,
                     Metric, MetricGroup, Select)
 import argparse
+from common_metrics import Cycles
 import json
 import math
 import os
@@ -571,6 +572,7 @@ def AmdUpc() -> Metric:
   return Metric("upc", "Micro-ops retired per core cycle (higher is better)",
                 upc, "uops/cycle")
 
+
 def Idle() -> Metric:
   cyc = Event("msr/mperf/")
   tsc = Event("msr/tsc/")
@@ -652,6 +654,7 @@ def main() -> None:
       AmdHwpf(),
       AmdSwpf(),
       AmdUpc(),
+      Cycles(),
       Idle(),
       Rapl(),
       UncoreL3(),
diff --git a/tools/perf/pmu-events/arm64_metrics.py b/tools/perf/pmu-events/arm64_metrics.py
index 53615ffa8d96..a9ef51a9112a 100755
--- a/tools/perf/pmu-events/arm64_metrics.py
+++ b/tools/perf/pmu-events/arm64_metrics.py
@@ -3,6 +3,7 @@
 from metric import (d_ratio, Event, JsonEncodeMetric, JsonEncodeMetricGroupDescriptions,
                     LoadEvents, Metric, MetricGroup)
 import argparse
+from common_metrics import Cycles
 import json
 import os
 from typing import Optional
@@ -168,6 +169,7 @@ def main() -> None:
 
   all_metrics = MetricGroup("",[
       Arm64Topdown(),
+      Cycles(),
   ])
 
   directory = f"{_args.events_path}/arm64/{_args.vendor}/{_args.model}/"
diff --git a/tools/perf/pmu-events/common_metrics.py b/tools/perf/pmu-events/common_metrics.py
new file mode 100644
index 000000000000..74c58f9ab020
--- /dev/null
+++ b/tools/perf/pmu-events/common_metrics.py
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
+from metric import (d_ratio, Event, Metric, MetricGroup)
+
+def Cycles() -> MetricGroup:
+  cyc_k = Event("cycles:kHh")
+  cyc_g = Event("cycles:G")
+  cyc_u = Event("cycles:uH")
+  cyc = cyc_k + cyc_g + cyc_u
+
+  return MetricGroup("cycles", [
+      Metric("cycles_total", "Total number of cycles", cyc, "cycles"),
+      Metric("cycles_user", "User cycles as a percentage of all cycles",
+             d_ratio(cyc_u, cyc), "100%"),
+      Metric("cycles_kernel", "Kernel cycles as a percentage of all cycles",
+             d_ratio(cyc_k, cyc), "100%"),
+      Metric("cycles_guest", "Hypervisor guest cycles as a percentage of all cycles",
+             d_ratio(cyc_g, cyc), "100%"),
+  ], description = "cycles breakdown per privilege level (users, kernel, guest)")
diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events/intel_metrics.py
index 778517968b4e..f8c4eb29d4f6 100755
--- a/tools/perf/pmu-events/intel_metrics.py
+++ b/tools/perf/pmu-events/intel_metrics.py
@@ -4,6 +4,7 @@ from metric import (d_ratio, has_event, max, CheckPmu, Event, JsonEncodeMetric,
                     JsonEncodeMetricGroupDescriptions, Literal, LoadEvents,
                     Metric, MetricConstraint, MetricGroup, MetricRef, Select)
 import argparse
+from common_metrics import Cycles
 import json
 import math
 import os
@@ -1027,6 +1028,7 @@ def main() -> None:
   LoadEvents(directory)
 
   all_metrics = MetricGroup("", [
+      Cycles(),
       Idle(),
       Rapl(),
       Smi(),
-- 
2.44.0.278.ge034bb2e1d-goog