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Message-ID: <20251113032040.1994090-23-irogers@google.com>
Date: Wed, 12 Nov 2025 19:20:10 -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 22/52] perf jevents: Add dtlb metric group for AMD
Add metrics that give an overview and details of the dtlb (zen1, zen2,
zen3).
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/pmu-events/amd_metrics.py | 111 +++++++++++++++++++++++++++
1 file changed, 111 insertions(+)
diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py
index 60f4ecedae6c..1592d7db2ac7 100755
--- a/tools/perf/pmu-events/amd_metrics.py
+++ b/tools/perf/pmu-events/amd_metrics.py
@@ -121,6 +121,116 @@ def AmdBr():
description="breakdown of retired branch instructions")
+def AmdDtlb() -> Optional[MetricGroup]:
+ global _zen_model
+ if _zen_model >= 4:
+ return None
+
+ d_dat = Event("ls_dc_accesses") if _zen_model <= 3 else None
+ d_h4k = Event("ls_l1_d_tlb_miss.tlb_reload_4k_l2_hit")
+ d_hcoal = Event(
+ "ls_l1_d_tlb_miss.tlb_reload_coalesced_page_hit") if _zen_model >= 2 else 0
+ d_h2m = Event("ls_l1_d_tlb_miss.tlb_reload_2m_l2_hit")
+ d_h1g = Event("ls_l1_d_tlb_miss.tlb_reload_1g_l2_hit")
+
+ d_m4k = Event("ls_l1_d_tlb_miss.tlb_reload_4k_l2_miss")
+ d_mcoal = Event(
+ "ls_l1_d_tlb_miss.tlb_reload_coalesced_page_miss") if _zen_model >= 2 else 0
+ d_m2m = Event("ls_l1_d_tlb_miss.tlb_reload_2m_l2_miss")
+ d_m1g = Event("ls_l1_d_tlb_miss.tlb_reload_1g_l2_miss")
+
+ d_w0 = Event("ls_tablewalker.dc_type0") if _zen_model <= 3 else None
+ d_w1 = Event("ls_tablewalker.dc_type1") if _zen_model <= 3 else None
+ walks = d_w0 + d_w1
+ walks_r = d_ratio(walks, interval_sec)
+ ins_w = d_ratio(ins, walks)
+ l1 = d_dat
+ l1_r = d_ratio(l1, interval_sec)
+ l2_hits = d_h4k + d_hcoal + d_h2m + d_h1g
+ l2_miss = d_m4k + d_mcoal + d_m2m + d_m1g
+ l2_r = d_ratio(l2_hits + l2_miss, interval_sec)
+ l1_miss = l2_hits + l2_miss + walks
+ l1_hits = max(l1 - l1_miss, 0)
+ ins_l = d_ratio(ins, l1_miss)
+
+ return MetricGroup("lpm_dtlb", [
+ MetricGroup("lpm_dtlb_ov", [
+ Metric("lpm_dtlb_ov_insn_bt_l1_miss",
+ "DTLB overview: instructions between l1 misses.", ins_l,
+ "insns"),
+ Metric("lpm_dtlb_ov_insn_bt_walks",
+ "DTLB overview: instructions between dtlb page table walks.",
+ ins_w, "insns"),
+ ]),
+ MetricGroup("lpm_dtlb_l1", [
+ Metric("lpm_dtlb_l1_hits",
+ "DTLB L1 hits as percentage of all DTLB L1 accesses.",
+ d_ratio(l1_hits, l1), "100%"),
+ Metric("lpm_dtlb_l1_miss",
+ "DTLB L1 misses as percentage of all DTLB L1 accesses.",
+ d_ratio(l1_miss, l1), "100%"),
+ Metric("lpm_dtlb_l1_reqs", "DTLB L1 accesses per second.", l1_r,
+ "insns/s"),
+ ]),
+ MetricGroup("lpm_dtlb_l2", [
+ Metric("lpm_dtlb_l2_hits",
+ "DTLB L2 hits as percentage of all DTLB L2 accesses.",
+ d_ratio(l2_hits, l2_hits + l2_miss), "100%"),
+ Metric("lpm_dtlb_l2_miss",
+ "DTLB L2 misses as percentage of all DTLB L2 accesses.",
+ d_ratio(l2_miss, l2_hits + l2_miss), "100%"),
+ Metric("lpm_dtlb_l2_reqs", "DTLB L2 accesses per second.", l2_r,
+ "insns/s"),
+ MetricGroup("lpm_dtlb_l2_4kb", [
+ Metric(
+ "lpm_dtlb_l2_4kb_hits",
+ "DTLB L2 4kb page size hits as percentage of all DTLB L2 4kb "
+ "accesses.", d_ratio(d_h4k, d_h4k + d_m4k), "100%"),
+ Metric(
+ "lpm_dtlb_l2_4kb_miss",
+ "DTLB L2 4kb page size misses as percentage of all DTLB L2 4kb"
+ "accesses.", d_ratio(d_m4k, d_h4k + d_m4k), "100%")
+ ]),
+ MetricGroup("lpm_dtlb_l2_coalesced", [
+ Metric(
+ "lpm_dtlb_l2_coal_hits",
+ "DTLB L2 coalesced page (16kb) hits as percentage of all DTLB "
+ "L2 coalesced accesses.", d_ratio(d_hcoal,
+ d_hcoal + d_mcoal), "100%"),
+ Metric(
+ "lpm_dtlb_l2_coal_miss",
+ "DTLB L2 coalesced page (16kb) misses as percentage of all "
+ "DTLB L2 coalesced accesses.",
+ d_ratio(d_mcoal, d_hcoal + d_mcoal), "100%")
+ ]),
+ MetricGroup("lpm_dtlb_l2_2mb", [
+ Metric(
+ "lpm_dtlb_l2_2mb_hits",
+ "DTLB L2 2mb page size hits as percentage of all DTLB L2 2mb "
+ "accesses.", d_ratio(d_h2m, d_h2m + d_m2m), "100%"),
+ Metric(
+ "lpm_dtlb_l2_2mb_miss",
+ "DTLB L2 2mb page size misses as percentage of all DTLB L2 "
+ "accesses.", d_ratio(d_m2m, d_h2m + d_m2m), "100%")
+ ]),
+ MetricGroup("lpm_dtlb_l2_1g", [
+ Metric(
+ "lpm_dtlb_l2_1g_hits",
+ "DTLB L2 1gb page size hits as percentage of all DTLB L2 1gb "
+ "accesses.", d_ratio(d_h1g, d_h1g + d_m1g), "100%"),
+ Metric(
+ "lpm_dtlb_l2_1g_miss",
+ "DTLB L2 1gb page size misses as percentage of all DTLB L2 "
+ "1gb accesses.", d_ratio(d_m1g, d_h1g + d_m1g), "100%")
+ ]),
+ ]),
+ MetricGroup("lpm_dtlb_walks", [
+ Metric("lpm_dtlb_walks_reqs", "DTLB page table walks per second.",
+ walks_r, "walks/s"),
+ ]),
+ ], description="Data TLB metrics")
+
+
def AmdItlb():
global _zen_model
l2h = Event("bp_l1_tlb_miss_l2_tlb_hit", "bp_l1_tlb_miss_l2_hit")
@@ -398,6 +508,7 @@ def main() -> None:
all_metrics = MetricGroup("", [
AmdBr(),
+ AmdDtlb(),
AmdItlb(),
AmdHwpf(),
AmdSwpf(),
--
2.51.2.1041.gc1ab5b90ca-goog
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