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

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Sandipan Das <sandipan.das@amd.com>
---
 tools/perf/pmu-events/amd_metrics.py | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index 2d1d25cb40b2..6542c334a82b 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -316,6 +316,24 @@ def Rapl() -> MetricGroup:
                        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("lpm_l3", [
+        Metric("lpm_l3_accesses", "L3 victim cache accesses",
+               d_ratio(acc, interval_sec), "accesses/sec"),
+        Metric("lpm_l3_hits", "L3 victim cache hit rate",
+               d_ratio(hits, acc), "100%"),
+        Metric("lpm_l3_miss", "L3 victim cache miss rate", d_ratio(miss, acc),
+               "100%"),
+    ], description="L3 cache breakdown per CCX")
+
+
 def main() -> None:
     global _args
     global _zen_model
@@ -350,6 +368,7 @@ def main() -> None:
         AmdUpc(),
         Idle(),
         Rapl(),
+        UncoreL3(),
     ])
 
     if _args.metricgroups:
-- 
2.52.0.158.g65b55ccf14-goog