From nobody Fri Oct 3 15:34:23 2025 Received: from mail-pl1-f201.google.com (mail-pl1-f201.google.com [209.85.214.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 96BBB2153E1 for ; Fri, 29 Aug 2025 05:32:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756445570; cv=none; b=RMiyUa3mJD//+fIqOX1aw6GplYWI4tpbMSG6oUQmrZLB7jdFQvuQ/yf+Jfz4f6diQXCdu/kw2KabmivPzG6JSmiE/PoG1jpvkMWEwc4sjJudW9eJfEPebc7NB4oxPlqcMrhQgXY95p5q0KUAhaX/q/yE5bF5zILrNRjfLr0ZXZU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756445570; c=relaxed/simple; bh=qhzqJB8xjjx7hDGsiqNEPrBT+3QQAgj7yc0dso5UGtc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=iR9Ahq0BghKHe08kq9CnXltKiHV7alImcJisVj/LdqXBtmzcTL9QDrh6DCS+YD5tx+ckql4LYCR8qUP5qdNoiDGw2nMj6Qf2PCRxskJ4BGGdVlFWsuwR41HG45m2e+Vc0rA8GJhwL3t+Ajt3wJmUWpvsI4AEDuGd6+sPdZUiIlk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=OmNaOEqw; arc=none smtp.client-ip=209.85.214.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="OmNaOEqw" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-24457ef983fso34128525ad.0 for ; Thu, 28 Aug 2025 22:32:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1756445568; x=1757050368; darn=vger.kernel.org; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=tpvVsEm8uCiz3vvKLatxB4dMae1DpSClGqRKsbH6ivQ=; b=OmNaOEqwUX4zzmqypzZDqE2uAnksfqCHIzxygyQAq5haJ4u6WZ63EtsGRBQu12KrxP 2dRemGavE6ULbFS85GzdsVrsBJH1Ms+E0lMz1ABbRcQ/wIOkdLT/B/pPG3dEhCm1m1LB 6Jnndt+jx2fyVLj1UYX2yY4WQcqFCvhxyuMN+4sPZsKC0PnC+WKno/wGCURtQHLoenCq VWiHpkKWn+iJf4tX6/poYyaz96AqNmOMJOsb4EiAzJ+IzNMZIaBpRYBrITE2rq70YoBl 3H4dN+kswFIRb+Cc5egxp3c+9TZLw1hyLWV0vYa/CUvXjtLkeiF6UmHQ6Ovl19kh5gRO tQ8g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756445568; x=1757050368; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=tpvVsEm8uCiz3vvKLatxB4dMae1DpSClGqRKsbH6ivQ=; b=Bl12f9xtYhzM7rcyCOTuu2LBzcvbwDomwBZcoz0Ks7c2QlRhbYD2JmiUDczkpll/1i oARRP98fRfK1uV9XM0Fjw2rboVmserm18g5wPkYqVsCCBd/H17RCbTT+cFVnQuVjcPS6 8B0zBTQpXSAVwqGiEhA04odO73YkHkh1KNyaPXz8XelMDiwQZwworWOGfhJgo4ymsehc eX5A4sU8Zn7AZIN0A/EcrI0vGHn3D1VbK8aZ1fzEdCVSzQ/qt/viS5WFBK8mHD4W34DG M9noBDeRmRvYgIPbX0lS7CBwl/LAtiS87/nmt8kVhcQpLdv86SSmjNueJWL1B6gvXk/y xDkA== X-Forwarded-Encrypted: i=1; AJvYcCXQ/MtL3yohM5zVuWiT8GRk3u7cCl9hEMd6TZps8R1u4pIdEw1lGTzU/5y3azgex+rT1TZ5+NDOw4DIaLU=@vger.kernel.org X-Gm-Message-State: AOJu0Yw6yEZec/A16105ud9cxj0I9JCzw0efSAvNRzIUlI40TMDW3RSA 00C0Kwg1UwD5GPjrh38DFoBvOp6fnjw0LgaxgWevSQgGAcpCkM91QSzIsABH1LOPP+V9tg0w+8j arsoRipr0bQ== X-Google-Smtp-Source: AGHT+IEuURIFdhc60Y7oiueRhiGe3lniJZNN2qIl7eyAybDR/lYTz6yTkgMcOHrIV8zSjhUwXzxVb1x9NUmN X-Received: from plry17.prod.google.com ([2002:a17:902:b491:b0:248:6b51:1364]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:1a43:b0:246:adf0:c32e with SMTP id d9443c01a7336-246adf0c686mr237822065ad.40.1756445567979; Thu, 28 Aug 2025 22:32:47 -0700 (PDT) Date: Thu, 28 Aug 2025 22:32:33 -0700 In-Reply-To: <20250829053235.21994-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250829053235.21994-1-irogers@google.com> X-Mailer: git-send-email 2.51.0.318.gd7df087d1a-goog Message-ID: <20250829053235.21994-2-irogers@google.com> Subject: [PATCH v5 1/3] perf jevents: Add collection of topdown like metrics for arm64 From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , James Clark , Xu Yang , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, John Garry , Jing Zhang , Sandipan Das , Benjamin Gray , Leo Yan Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Metrics are created using legacy, common and recommended events. As events may be missing a TryEvent function will give None if an event is missing. To workaround missing JSON events for cortex-a53, sysfs encodings are used. Signed-off-by: Ian Rogers --- tools/perf/pmu-events/arm64_metrics.py | 148 ++++++++++++++++++++++++- 1 file changed, 144 insertions(+), 4 deletions(-) diff --git a/tools/perf/pmu-events/arm64_metrics.py b/tools/perf/pmu-events= /arm64_metrics.py index c9aa2d827a82..067ebbad1adf 100755 --- a/tools/perf/pmu-events/arm64_metrics.py +++ b/tools/perf/pmu-events/arm64_metrics.py @@ -1,14 +1,152 @@ #!/usr/bin/env python3 # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) -from metric import (JsonEncodeMetric, JsonEncodeMetricGroupDescriptions, L= oadEvents, - MetricGroup) +from metric import (d_ratio, Event, JsonEncodeMetric, JsonEncodeMetricGrou= pDescriptions, + LoadEvents, Metric, MetricGroup) import argparse import json import os +from typing import Optional =20 # Global command line arguments. _args =3D None =20 +def Arm64Topdown() -> MetricGroup: + """Returns a MetricGroup representing ARM64 topdown like metrics.""" + def TryEvent(name: str) -> Optional[Event]: + # Skip an event if not in the json files. + try: + return Event(name) + except: + return None + # ARM models like a53 lack JSON for INST_RETIRED but have the + # architetural standard event in sysfs. Use the PMU name to identify + # the sysfs event. + pmu_name =3D f'armv8_{_args.model.replace("-", "_")}' + ins =3D Event("instructions") + ins_ret =3D Event("INST_RETIRED", f"{pmu_name}/inst_retired/") + cycles =3D Event("cycles") + stall_fe =3D TryEvent("STALL_FRONTEND") + stall_be =3D TryEvent("STALL_BACKEND") + br_ret =3D TryEvent("BR_RETIRED") + br_mp_ret =3D TryEvent("BR_MIS_PRED_RETIRED") + dtlb_walk =3D TryEvent("DTLB_WALK") + itlb_walk =3D TryEvent("ITLB_WALK") + l1d_tlb =3D TryEvent("L1D_TLB") + l1i_tlb =3D TryEvent("L1I_TLB") + l1d_refill =3D Event("L1D_CACHE_REFILL", f"{pmu_name}/l1d_cache_refill/") + l2d_refill =3D Event("L2D_CACHE_REFILL", f"{pmu_name}/l2d_cache_refill/") + l1i_refill =3D Event("L1I_CACHE_REFILL", f"{pmu_name}/l1i_cache_refill/") + l1d_access =3D Event("L1D_CACHE", f"{pmu_name}/l1d_cache/") + l2d_access =3D Event("L2D_CACHE", f"{pmu_name}/l2d_cache/") + llc_access =3D TryEvent("LL_CACHE_RD") + l1i_access =3D Event("L1I_CACHE", f"{pmu_name}/l1i_cache/") + llc_miss_rd =3D TryEvent("LL_CACHE_MISS_RD") + ase_spec =3D TryEvent("ASE_SPEC") + ld_spec =3D TryEvent("LD_SPEC") + st_spec =3D TryEvent("ST_SPEC") + vfp_spec =3D TryEvent("VFP_SPEC") + dp_spec =3D TryEvent("DP_SPEC") + br_immed_spec =3D TryEvent("BR_IMMED_SPEC") + br_indirect_spec =3D TryEvent("BR_INDIRECT_SPEC") + br_ret_spec =3D TryEvent("BR_RETURN_SPEC") + crypto_spec =3D TryEvent("CRYPTO_SPEC") + inst_spec =3D TryEvent("INST_SPEC") + + return MetricGroup("lpm_topdown", [ + MetricGroup("lpm_topdown_tl", [ + Metric("lpm_topdown_tl_ipc", "Instructions per cycle", d_ratio( + ins, cycles), "insn/cycle"), + Metric("lpm_topdown_tl_stall_fe_rate", "Frontend stalls to all c= ycles", + d_ratio(stall_fe, cycles), "100%") if stall_fe else None, + Metric("lpm_topdown_tl_stall_be_rate", "Backend stalls to all cy= cles", + d_ratio(stall_be, cycles), "100%") if stall_be else None, + ]), + MetricGroup("lpm_topdown_fe_bound", [ + MetricGroup("lpm_topdown_fe_br", [ + Metric("lpm_topdown_fe_br_mp_per_insn", + "Branch mispredicts per instruction retired", + d_ratio(br_mp_ret, ins_ret), "br/insn") if br_mp_ret = else None, + Metric("lpm_topdown_fe_br_ins_rate", + "Branches per instruction retired", d_ratio( + br_ret, ins_ret), "100%") if br_ret else None, + Metric("lpm_topdown_fe_br_mispredict", + "Branch mispredicts per branch instruction", + d_ratio(br_mp_ret, br_ret), "100%") if (br_mp_ret and= br_ret) else None, + ]), + MetricGroup("lpm_topdown_fe_itlb", [ + Metric("lpm_topdown_fe_itlb_walks", "Itlb walks per insn", + d_ratio(itlb_walk, ins_ret), "walk/insn"), + Metric("lpm_topdown_fe_itlb_walk_rate", "Itlb walks per L1I = TLB access", + d_ratio(itlb_walk, l1i_tlb) if l1i_tlb else None, "10= 0%"), + ]) if itlb_walk else None, + MetricGroup("lpm_topdown_fe_icache", [ + Metric("lpm_topdown_fe_icache_l1i_per_insn", + "L1I cache refills per instruction", + d_ratio(l1i_refill, ins_ret), "l1i/insn"), + Metric("lpm_topdown_fe_icache_l1i_miss_rate", + "L1I cache refills per L1I cache access", + d_ratio(l1i_refill, l1i_access), "100%"), + ]), + ]), + MetricGroup("lpm_topdown_be_bound", [ + MetricGroup("lpm_topdown_be_dtlb", [ + Metric("lpm_topdown_be_dtlb_walks", "Dtlb walks per instruct= ion", + d_ratio(dtlb_walk, ins_ret), "walk/insn"), + Metric("lpm_topdown_be_dtlb_walk_rate", "Dtlb walks per L1D = TLB access", + d_ratio(dtlb_walk, l1d_tlb) if l1d_tlb else None, "10= 0%"), + ]) if dtlb_walk else None, + MetricGroup("lpm_topdown_be_mix", [ + Metric("lpm_topdown_be_mix_ld", "Percentage of load instruct= ions", + d_ratio(ld_spec, inst_spec), "100%") if ld_spec else = None, + Metric("lpm_topdown_be_mix_st", "Percentage of store instruc= tions", + d_ratio(st_spec, inst_spec), "100%") if st_spec else = None, + Metric("lpm_topdown_be_mix_simd", "Percentage of SIMD instru= ctions", + d_ratio(ase_spec, inst_spec), "100%") if ase_spec els= e None, + Metric("lpm_topdown_be_mix_fp", + "Percentage of floating point instructions", + d_ratio(vfp_spec, inst_spec), "100%") if vfp_spec els= e None, + Metric("lpm_topdown_be_mix_dp", + "Percentage of data processing instructions", + d_ratio(dp_spec, inst_spec), "100%") if dp_spec else = None, + Metric("lpm_topdown_be_mix_crypto", + "Percentage of data processing instructions", + d_ratio(crypto_spec, inst_spec), "100%") if crypto_sp= ec else None, + Metric( + "lpm_topdown_be_mix_br", "Percentage of branch instructi= ons", + d_ratio(br_immed_spec + br_indirect_spec + br_ret_spec, + inst_spec), "100%") if br_immed_spec and br_indi= rect_spec and br_ret_spec else None, + ], description=3D"Breakdown of instructions by type. Counts incl= ude both useful and wasted speculative instructions" + ) if inst_spec else None, + MetricGroup("lpm_topdown_be_dcache", [ + MetricGroup("lpm_topdown_be_dcache_l1", [ + Metric("lpm_topdown_be_dcache_l1_per_insn", + "L1D cache refills per instruction", + d_ratio(l1d_refill, ins_ret), "refills/insn"), + Metric("lpm_topdown_be_dcache_l1_miss_rate", + "L1D cache refills per L1D cache access", + d_ratio(l1d_refill, l1d_access), "100%") + ]), + MetricGroup("lpm_topdown_be_dcache_l2", [ + Metric("lpm_topdown_be_dcache_l2_per_insn", + "L2D cache refills per instruction", + d_ratio(l2d_refill, ins_ret), "refills/insn"), + Metric("lpm_topdown_be_dcache_l2_miss_rate", + "L2D cache refills per L2D cache access", + d_ratio(l2d_refill, l2d_access), "100%") + ]), + MetricGroup("lpm_topdown_be_dcache_llc", [ + Metric("lpm_topdown_be_dcache_llc_per_insn", + "Last level cache misses per instruction", + d_ratio(llc_miss_rd, ins_ret), "miss/insn"), + Metric("lpm_topdown_be_dcache_llc_miss_rate", + "Last level cache misses per last level cache acc= ess", + d_ratio(llc_miss_rd, llc_access), "100%") + ]) if llc_miss_rd and llc_access else None, + ]), + ]), + ]) + + def main() -> None: global _args =20 @@ -29,11 +167,13 @@ def main() -> None: ) _args =3D parser.parse_args() =20 - all_metrics =3D MetricGroup("",[]) - directory =3D f"{_args.events_path}/arm64/{_args.vendor}/{_args.model}/" LoadEvents(directory) =20 + all_metrics =3D MetricGroup("",[ + Arm64Topdown(), + ]) + if _args.metricgroups: print(JsonEncodeMetricGroupDescriptions(all_metrics)) else: --=20 2.51.0.318.gd7df087d1a-goog