linux-kernel - [PATCH v8 27/52] perf jevents: Add uop cache hit/miss rates for AMD

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Message-ID: <20251113032040.1994090-28-irogers@google.com>
Date: Wed, 12 Nov 2025 19:20:15 -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 27/52] perf jevents: Add uop cache hit/miss rates for AMD

Add metrics giving ratio of uop cache hits to misses.

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 da50337557f5..b2e3e2883022 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -584,6 +584,23 @@ def AmdSwpf() -> Optional[MetricGroup]:
                        description="Software prefetch breakdown (CCX L3 = L3 of current thread, Loc CCX = CCX cache on some socket)")
 
 
+def AmdUopCache() -> Optional[MetricGroup]:
+    try:
+        op_cache_hit = Event("op_cache_hit_miss.op_cache_hit")
+        op_cache_miss = Event("op_cache_hit_miss.op_cache_miss")
+    except:
+        return None
+    op_cache_total = op_cache_hit + op_cache_miss
+    return MetricGroup("lpm_uop_cache", [
+        Metric("lpm_uop_cache_hit_ratio", "Uop cache full or partial hits rate",
+               d_ratio(op_cache_hit, op_cache_total),
+               "100%"),
+        Metric("lpm_uop_cache_miss_ratio", "Uop cache misses rate",
+               d_ratio(op_cache_miss, op_cache_total),
+               "100%"),
+    ], description="Micro-op (uop) hit and miss rates.")
+
+
 def AmdUpc() -> Metric:
     ops = Event("ex_ret_ops", "ex_ret_cops")
     upc = d_ratio(ops, smt_cycles)
@@ -675,6 +692,7 @@ def main() -> None:
         AmdLdSt(),
         AmdHwpf(),
         AmdSwpf(),
+        AmdUopCache(),
         AmdUpc(),
         Idle(),
         Rapl(),
-- 
2.51.2.1041.gc1ab5b90ca-goog