From nobody Thu Sep 18 03:45:05 2025 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 4D70B253B71 for ; Fri, 29 Aug 2025 04:11:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756440715; cv=none; b=YHEBBTLcanvB7yJXV4mvLfAzra1JXNkQJ6+OIMPnOvws4hZ33zNqpjV7g4/fbPSG3x8mzheqCjgUlwLm6Hyre2CYONQVVL89wtAv2R4BfgXQwk16f1sW2p00XlxNP2aXx8cDWQHxHbtqQ5bkwT1Kk7MjNlktXajFDq7Z6vaKCGI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756440715; c=relaxed/simple; bh=lan6OtYMxNeS1SjsmHeeU/NzNOqeBRB9k+2kHx/JzGs=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=SHbXL7NC/lsg57vyxT8mPgDqn5uVbYIUtB6vlgh4MQcSZWMj/qZ3gmxZ/TVnCk6zkVgjN1u6qQkPUiuUoSkl3z5K3QegUpvTh1RThxlAAvHU+DU6n6F+KWHZMr2XtXhxU8WvVoZNQelVvU1FNiizmSJjSCpGix8KhFxHfQ/bkPg= 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=PStj15HK; arc=none smtp.client-ip=209.85.216.73 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="PStj15HK" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-327b5e7f2f6so1848621a91.2 for ; Thu, 28 Aug 2025 21:11:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1756440713; x=1757045513; 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=gS0ggSa3B78eXuzRtpBd8eGQQtYmBLlFFRtUxftkvfY=; b=PStj15HKSSuE4sEHRWNbMwpzUBSVF6t+m6GY7oAlRWi8mQibYofwOFwOvNrYBWaIRV 9tjIbvEmf2vmgwfs/b8qkX2wmSeZneO30kzMSBg0FXEuQi+lPceY7086Rt7WvZP/uQbY eB7tR/34DbGSHXCjf3Bvnvsh2krrsiswC5yBZSnDzn6RdmGWLtbCNbb4tyh+8SP/d3Q4 zXvSAqkuXJhTeq+u10wrfThvv4uSnreDCVhQpGDp8Ra1M8S/FZLdUbVwyEUbRLH/iYW2 HLQCSm6xFaIUETvQP5xXTymfJMjfJr9t4qj5hCo32qmfzWtIc/l0SOTRQ+r2oP7pWTqI 2KTA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756440713; x=1757045513; 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=gS0ggSa3B78eXuzRtpBd8eGQQtYmBLlFFRtUxftkvfY=; b=lV/l3FV1aRMdrxFBUaZO6AT5iWtb9Mv1Aei/RbBuGYFba3jtsUSUMmMWKd4hBp7npJ vXlnW4SlLo9givJNwre8E1v8PMAI+ShgTOMhQOh5XKQIIleCodimnUQzZ/1hvR0DTjoV 0QeFojAR3kT8Yq/UkITFb0OR3dCVgUOMglxxJPJFjWdnjS2zoMwAHvVxNjdCSs9kzAUe VbVBhUBrD1UBlVRFZnapwH0GnEUjnUwVF3ZkDt/EGmQSbPAuU3/gdBemlDhykvTwF4Je RgKHEvdhMRVM1QwVx0LTNSCxgKZGH9IfA63urwwxzsIWOkXb0REr1/bWcfJlH4uQJyY7 KU2Q== X-Forwarded-Encrypted: i=1; AJvYcCUPY8sDZNqEr7XvECBzdS3Qw+ES+vjDHhrU0FaWw7Uw5pvfcRMmdKwZ4eAks8CqFUW3XgR77vPcfRVni+g=@vger.kernel.org X-Gm-Message-State: AOJu0Yw14CwKOVTDd+z+OmixbGd6Gi5Ws4hpxiSn5BrTvcH9HNMKS/NV cJ0QWScteusII55Y4j1VsFi4I6Ihc2pnqAiLrPyWh8uH2+sa0eQIOU2OdkTDks8e2Z/GAKLkJNV tqp3J9upddA== X-Google-Smtp-Source: AGHT+IHF3tfh1i3hXHmRmKdBVtbaz8DNMGNPO1B9d929xEINzZyfq597XDPtc+crdVx3L9yl7+eLf9OQ0Q5u X-Received: from pjbdb14.prod.google.com ([2002:a17:90a:d64e:b0:31f:b2f:aeed]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:564f:b0:325:211b:da6e with SMTP id 98e67ed59e1d1-325211bdcb3mr31761618a91.32.1756440713558; Thu, 28 Aug 2025 21:11:53 -0700 (PDT) Date: Thu, 28 Aug 2025 21:10:54 -0700 In-Reply-To: <20250829041104.4186320-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250829041104.4186320-1-irogers@google.com> X-Mailer: git-send-email 2.51.0.318.gd7df087d1a-goog Message-ID: <20250829041104.4186320-14-irogers@google.com> Subject: [PATCH v5 13/22] perf jevents: Add context switch metrics for Intel 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 , Perry Taylor , Samantha Alt , Caleb Biggers , Weilin Wang , Edward Baker , Thomas Falcon 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 | 55 ++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/tools/perf/pmu-events/intel_metrics.py b/tools/perf/pmu-events= /intel_metrics.py index df0e1dce041c..31ef0373d982 100755 --- a/tools/perf/pmu-events/intel_metrics.py +++ b/tools/perf/pmu-events/intel_metrics.py @@ -262,6 +262,60 @@ def IntelBr(): description=3D"breakdown of retired branch instructio= ns") =20 =20 +def IntelCtxSw() -> MetricGroup: + cs =3D Event("context\-switches") + metrics =3D [ + Metric("lpm_cs_rate", "Context switches per second", d_ratio(cs, int= erval_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_LOADS= ") + 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_STOR= ES") + 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 context s= witch", + 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", "L= 2_RQSTS.PF_MISS") + except: + pass + + metrics.append(Metric("lpm_cs_l2_misses", "L2 misses per context switc= h", + 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/") @@ -671,6 +725,7 @@ def main() -> None: Smi(), Tsx(), IntelBr(), + IntelCtxSw(), IntelIlp(), IntelL2(), IntelLdSt(), --=20 2.51.0.318.gd7df087d1a-goog