linux-kernel - [PATCH v2 07/12] perf jevents: Add itlb metric group for AMD

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Message-Id: <20240301184737.2660108-8-irogers@google.com>
Date: Fri,  1 Mar 2024 10:47:32 -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 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 | 47 ++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index dda904998269..82aab39c2a50 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -125,6 +125,52 @@ def AmdBr():
                      description="breakdown of retired branch instructions")
 
 
+def AmdItlb():
+  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."""
   if zen_model <= 1:
@@ -316,6 +362,7 @@ def Rapl() -> MetricGroup:
 
 all_metrics = MetricGroup("", [
     AmdBr(),
+    AmdItlb(),
     AmdHwpf(),
     AmdSwpf(),
     AmdUpc(),
-- 
2.44.0.278.ge034bb2e1d-goog