From c4108b9509f2cc1fab66c64c2de55ac4f9ee38b4 Mon Sep 17 00:00:00 2001 From: Ian Rogers Date: Tue, 27 Jan 2026 10:44:39 -0800 Subject: [PATCH] perf jevents: Add dtlb metric group for AMD Add metrics that give an overview and details of the dtlb (zen1, zen2, zen3). Reviewed-by: Sandipan Das Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Benjamin Gray Cc: Caleb Biggers Cc: Edward Baker Cc: Ingo Molnar Cc: James Clark Cc: Jing Zhang Cc: Jiri Olsa Cc: John Garry Cc: Leo Yan Cc: Namhyung Kim Cc: Perry Taylor Cc: Peter Zijlstra Cc: Thomas Falcon Cc: Weilin Wang Cc: Xu Yang Signed-off-by: Arnaldo Carvalho de Melo --- 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 8fb0b55074a2..a4ff88de08b5 100755 --- a/tools/perf/pmu-events/amd_metrics.py +++ b/tools/perf/pmu-events/amd_metrics.py @@ -122,6 +122,116 @@ 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") @@ -236,6 +346,7 @@ def main() -> None: all_metrics = MetricGroup("", [ AmdBr(), + AmdDtlb(), AmdItlb(), AmdUpc(), Idle(), -- 2.47.3