linux-kernel - [PATCH v4 07/12] perf jevents: Add itlb metric group for AMD

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Message-Id: <20240926174101.406874-8-irogers@google.com>
Date: Thu, 26 Sep 2024 10:40:56 -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>, 
	Kan Liang <kan.liang@...ux.intel.com>, John Garry <john.g.garry@...cle.com>, 
	Jing Zhang <renyu.zj@...ux.alibaba.com>, Sandipan Das <sandipan.das@....com>, 
	Benjamin Gray <bgray@...ux.ibm.com>, Xu Yang <xu.yang_2@....com>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org
Subject: [PATCH v4 07/12] perf jevents: Add itlb metric group for AMD

Add metrics that give an overview and details of the l1 itlb (zen1,
zen2, zen3) and l2 itlb (all zens).

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/pmu-events/amd_metrics.py | 48 ++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index 2d1fc8411d61..bfed478f508b 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -120,6 +120,53 @@ def AmdBr():
                      description="breakdown of retired branch instructions")
 
 
+def AmdItlb():
+  global _zen_model
+  l2h = Event("bp_l1_tlb_miss_l2_tlb_hit", "bp_l1_tlb_miss_l2_hit")
+  l2m = Event("l2_itlb_misses")
+  l2r = l2h + l2m
+
+  itlb_l1_mg = None
+  l1m = l2r
+  if _zen_model <= 3:
+    l1r = Event("ic_fw32")
+    l1h = max(l1r - l1m, 0)
+    itlb_l1_mg = MetricGroup("itlb_l1", [
+        Metric("itlb_l1_hits",
+               "L1 ITLB hits as a perecentage of L1 ITLB accesses.",
+               d_ratio(l1h, l1h + l1m), "100%"),
+        Metric("itlb_l1_miss",
+               "L1 ITLB misses as a perecentage of L1 ITLB accesses.",
+               d_ratio(l1m, l1h + l1m), "100%"),
+        Metric("itlb_l1_reqs",
+               "The number of 32B fetch windows transferred from IC pipe to DE "
+               "instruction decoder per second.", d_ratio(l1r, interval_sec),
+               "windows/sec"),
+    ])
+
+  return MetricGroup("itlb", [
+      MetricGroup("itlb_ov", [
+          Metric("itlb_ov_insn_bt_l1_miss",
+                 "Number of instructions between l1 misses", d_ratio(
+                     ins, l1m), "insns"),
+          Metric("itlb_ov_insn_bt_l2_miss",
+                 "Number of instructions between l2 misses", d_ratio(
+                     ins, l2m), "insns"),
+      ]),
+      itlb_l1_mg,
+      MetricGroup("itlb_l2", [
+          Metric("itlb_l2_hits",
+                 "L2 ITLB hits as a percentage of all L2 ITLB accesses.",
+                 d_ratio(l2h, l2r), "100%"),
+          Metric("itlb_l2_miss",
+                 "L2 ITLB misses as a percentage of all L2 ITLB accesses.",
+                 d_ratio(l2m, l2r), "100%"),
+          Metric("itlb_l2_reqs", "ITLB accesses per second.",
+                 d_ratio(l2r, interval_sec), "accesses/sec"),
+      ]),
+  ], description="Instruction TLB breakdown")
+
+
 def AmdHwpf():
   """Returns a MetricGroup representing AMD hardware prefetch metrics."""
   global _zen_model
@@ -339,6 +386,7 @@ def main() -> None:
 
   all_metrics = MetricGroup("", [
       AmdBr(),
+      AmdItlb(),
       AmdHwpf(),
       AmdSwpf(),
       AmdUpc(),
-- 
2.46.1.824.gd892dcdcdd-goog