From nobody Tue Dec 9 03:42:38 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 0814E319612 for ; Thu, 13 Nov 2025 03:22:11 +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=1763004132; cv=none; b=IlJXcaBDW1TEHant16sCzLm+GlkZjjFzbrM3voCHWYKUzOaGTt4TLzmpnVYOGJprdvUVyM8sqIuB+iKdAEndiwsdX7Kw60j19Y0CYVg5nFFSPMXn2+ijflGSu+k8sJhVtUidBd2Pc1C0TrO/g0YZdUrQD5IpNWp8iBBLIBNdd/E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763004132; c=relaxed/simple; bh=3V2VLVo4pUTUZsrMQpMZJINP/Qhv3zRsmNC+KVt29MA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=LGGuGYJASLLawULEkeuVsiQcsQphx2mMjLHEuYIGj/AY10lwvmq2px5843NWIIad36QDBiK9V/SUEkInAaHtmGdelWIiucvy5fzAev5OHepIXl1ieBv6VV90Sd8SY0eZWL9wplBrtc1NPr9aSLWvVMQGoffOZLcZZJXIF+fevQs= 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=l2FRAtxD; 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="l2FRAtxD" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-29557f43d56so4366945ad.3 for ; Wed, 12 Nov 2025 19:22:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1763004130; x=1763608930; 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=KkSWIFF9K6+WvuhLC3J+ZaMa6l3rfvikZA5lkR5D2LU=; b=l2FRAtxD86PaPFkiLyxjSsRLpL7ujq+KfVFuDW9g5IdtVr0sEdk6sUL9auQUDJGBey DFvbmojrLcySrDuYrglmRRz4scDVCMLN8zQs/j/YoKekmNa6mc3i4PZ7uZgB686kv90z cwYbXAEMANYyvrqZYFDnV7+dt8L/d41LEDqmusTeYli0N9KGg7YpZ71BX3WdHt/Hb1Vr 2qVg6rLyw6UEiQikyncaC1UWujGf+J8nL+qEsqlKSfZmZ1NEC5QI2MIvmkeNE4NBVm4f 9gw8nBXkdR5ZQHIIq64AB8zyUp8mnbAOuqQSSZWRarcBHzc905yGczF/Ly9eDbkHuiHp Z4pw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763004130; x=1763608930; 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=KkSWIFF9K6+WvuhLC3J+ZaMa6l3rfvikZA5lkR5D2LU=; b=qpu0SHwG2zBgintK1mZHM2DOcfnnNiGhBMJBaR6rFzNn/usVyOIHRrAOVaLlWnUR2t qmmdcJ7ScOnB2kqxX1mkdCPNgc01denxpgn8Gz5SCKXhw6PkKeWLC0AbZmmPnb1/SbWN oAemXiizph6Iy1x0fleAHVPkFyveIHDKTFbGE6fJVG2dUjfjlnBJHmvost6aic/8FAPr LuYWHEKmiE4BrWMUtlCOUjZGpa4EdnO+oZdzlOhrBDGcznPRGbX1OWx2itqqsFzc5SKJ K4rtDLzVlwDRDDkYkLSNIgQMsjtieTFGboyarsNlRVZLaNGN2jIfvGjPdYJyxoCCS4sN vuyg== X-Forwarded-Encrypted: i=1; AJvYcCWQFHielLpPwu+Z59p1JYMuJcMEPlgYmtqjU1EOf2Hnt4fyFCmmxvW1mQImzYI38ZfwQozPUEUMrQieTiI=@vger.kernel.org X-Gm-Message-State: AOJu0YxT72YpUxxTgJ7VKo0AUHCNRfmz06Ec6SmNj5gI/HKYlEReIf7e PvljewTcWxNyUlIL/mXB5vZ7PFg+GfkPexvDe0pHaP70Qk11grBONV8PLBK0L6ISHS7jz9cnl9X n0lTufzZM3Q== X-Google-Smtp-Source: AGHT+IEyKyltlyCDbU4hqbiexDDPHzceFc98l5CXkwmdG5KoGmmnni7fKQrLRjEIkACVFV7MlkhharS/1GA+ X-Received: from dlbuy17.prod.google.com ([2002:a05:7022:1e11:b0:119:9f33:34a4]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:2b0f:b0:297:f09a:51db with SMTP id d9443c01a7336-2984ed45caemr68610415ad.15.1763004130509; Wed, 12 Nov 2025 19:22:10 -0800 (PST) Date: Wed, 12 Nov 2025 19:20:28 -0800 In-Reply-To: <20251113032040.1994090-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251113032040.1994090-1-irogers@google.com> X-Mailer: git-send-email 2.51.2.1041.gc1ab5b90ca-goog Message-ID: <20251113032040.1994090-41-irogers@google.com> Subject: [PATCH v8 40/52] perf jevents: Add context switch metrics for Intel From: Ian Rogers To: Adrian Hunter , Alexander Shishkin , Arnaldo Carvalho de Melo , Benjamin Gray , Caleb Biggers , Edward Baker , Ian Rogers , Ingo Molnar , James Clark , Jing Zhang , Jiri Olsa , John Garry , Leo Yan , Namhyung Kim , Perry Taylor , Peter Zijlstra , Samantha Alt , Sandipan Das , Thomas Falcon , Weilin Wang , Xu Yang , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Metrics break down context switches for different kinds of instruction. Signed-off-by: Ian Rogers --- tools/perf/pmu-events/intel_metrics.py | 58 ++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events= /intel_metrics.py index bc3c50285916..9cf4bd8ac769 100755 --- a/tools/perf/pmu-events/intel_metrics.py +++ b/tools/perf/pmu-events/intel_metrics.py @@ -263,6 +263,63 @@ def IntelBr(): description=3D"breakdown of retired branch instruct= ions") =20 =20 +def IntelCtxSw() -> MetricGroup: + cs =3D Event("context\\-switches") + metrics =3D [ + Metric("lpm_cs_rate", "Context switches per second", + d_ratio(cs, interval_sec), "ctxsw/s") + ] + + ev =3D Event("instructions") + metrics.append(Metric("lpm_cs_instr", "Instructions per context switch= ", + d_ratio(ev, cs), "instr/cs")) + + ev =3D Event("cycles") + metrics.append(Metric("lpm_cs_cycles", "Cycles per context switch", + d_ratio(ev, cs), "cycles/cs")) + + try: + ev =3D Event("MEM_INST_RETIRED.ALL_LOADS", "MEM_UOPS_RETIRED.ALL_L= OADS") + metrics.append(Metric("lpm_cs_loads", "Loads per context switch", + d_ratio(ev, cs), "loads/cs")) + except: + pass + + try: + ev =3D Event("MEM_INST_RETIRED.ALL_STORES", + "MEM_UOPS_RETIRED.ALL_STORES") + metrics.append(Metric("lpm_cs_stores", "Stores per context switch", + d_ratio(ev, cs), "stores/cs")) + except: + pass + + try: + ev =3D Event("BR_INST_RETIRED.NEAR_TAKEN", "BR_INST_RETIRED.TAKEN_= JCC") + metrics.append(Metric("lpm_cs_br_taken", "Branches taken per conte= xt switch", + d_ratio(ev, cs), "br_taken/cs")) + except: + pass + + try: + l2_misses =3D (Event("L2_RQSTS.DEMAND_DATA_RD_MISS") + + Event("L2_RQSTS.RFO_MISS") + + Event("L2_RQSTS.CODE_RD_MISS")) + try: + l2_misses +=3D Event("L2_RQSTS.HWPF_MISS", + "L2_RQSTS.L2_PF_MISS", "L2_RQSTS.PF_MISS") + except: + pass + + metrics.append(Metric("lpm_cs_l2_misses", "L2 misses per context s= witch", + d_ratio(l2_misses, cs), "l2_misses/cs")) + except: + pass + + return MetricGroup("lpm_cs", metrics, + description=3D("Number of context switches per seco= nd, instructions " + "retired & core cycles between context= switches")) + + def IntelIlp() -> MetricGroup: tsc =3D Event("msr/tsc/") c0 =3D Event("msr/mperf/") @@ -678,6 +735,7 @@ def main() -> None: Smi(), Tsx(), IntelBr(), + IntelCtxSw(), IntelIlp(), IntelL2(), IntelLdSt(), --=20 2.51.2.1041.gc1ab5b90ca-goog