linux-kernel - [PATCH v2 09/12] perf jevents: Add uncore l3 metric group for AMD

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Message-Id: <20240301184737.2660108-10-irogers@google.com>
Date: Fri,  1 Mar 2024 10:47:34 -0800
From: Ian Rogers <irogers@...gle.com>
To: Sandipan Das <sandipan.das@....com>, Ravi Bangoria <ravi.bangoria@....com>, 
	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 v2 09/12] perf jevents: Add uncore l3 metric group for AMD

Metrics use the amd_l3 PMU for access/miss/hit information.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/pmu-events/amd_metrics.py | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index be10acb40762..f4a4ece551ef 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -467,6 +467,23 @@ def Rapl() -> MetricGroup:
   return MetricGroup("cpu_power", metrics,
                      description="Processor socket power consumption estimates")
 
+def UncoreL3():
+  acc = Event("l3_lookup_state.all_coherent_accesses_to_l3",
+              "l3_lookup_state.all_l3_req_typs")
+  miss = Event("l3_lookup_state.l3_miss",
+               "l3_comb_clstr_state.request_miss")
+  acc = max(acc, miss)
+  hits = acc - miss
+
+  return MetricGroup("l3", [
+      Metric("l3_accesses", "L3 victim cache accesses",
+             d_ratio(acc, interval_sec), "accesses/sec"),
+      Metric("l3_hits", "L3 victim cache hit rate", d_ratio(hits, acc), "100%"),
+      Metric("l3_miss", "L3 victim cache miss rate", d_ratio(miss, acc),
+             "100%"),
+  ], description="L3 cache breakdown per CCX")
+
+
 all_metrics = MetricGroup("", [
     AmdBr(),
     AmdDtlb(),
@@ -476,6 +493,7 @@ all_metrics = MetricGroup("", [
     AmdUpc(),
     Idle(),
     Rapl(),
+    UncoreL3(),
 ])
 
 if args.metricgroups:
-- 
2.44.0.278.ge034bb2e1d-goog