From nobody Thu Dec 11 19:20:47 2025 Received: from mail-pg1-f202.google.com (mail-pg1-f202.google.com [209.85.215.202]) (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 873F82E093E for ; Tue, 2 Dec 2025 17:54:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764698056; cv=none; b=I4e9q7vjQi/nP5QirrqL8/UvetEqn5PuE//B6J76aw9oswJfPlny9jdYVB8USS9JxhI6gFEd2i4A3WR4fD3iHoSHHoE08cMhG9fPv8BrzmOS2sQdiXw5VxOqOrrDaG/0+6K+NVPHl1i+FV+SLcywLZQ4a7snK7nECOMHHzBF2GU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764698056; c=relaxed/simple; bh=/GIlef2EyZC6a9RRSOQMmBeM8UDXPXroHzFTd4A7XFs=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=sElUbXZTxPCJm1yAOO7J0Nznz2r3im8j/d9mO31STXYj5qviCnsOhsqk88CyoUvo+21MfCqpyydsR/P3UhyaVRMyXMfHLdqvuIPPIhDKsrnyYid8tw8k/Y7QGtmr1IO9koJ5v3fA8gb/KPvkdM16rh8Z2pi0IiuaRezXBFwP7ro= 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=f9EF33ct; arc=none smtp.client-ip=209.85.215.202 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="f9EF33ct" Received: by mail-pg1-f202.google.com with SMTP id 41be03b00d2f7-bde2e654286so4564921a12.3 for ; Tue, 02 Dec 2025 09:54:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1764698054; x=1765302854; 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=xkVu8b5ZXOgCEiRhWzvnOPQSP9ZYLvl9DnUVKbBmwB4=; b=f9EF33ctOsxkj0ezYa6ZAWZAwclYI7RsFkfA6p+6UxxojzRwd4Lxq+dsuDJzCFLJxf znr76h8VBQUzpt1t9M61phOY1ndmeoHpc/IDcV5dlxtGt5vVD/Yj9nqNwXMkag7/uEf7 XkfvdSF8+ENg8sWODZpPwlUXBZjZngybfNUIpIvypF2NT2nIHzD3kR57KPRl9oK3AEQt 6IBf9VJL+t69lMyfauIO7SRKBh/7suTyyRbEObs4pkW0qoUtnh8iVwavXEQjIgQmpNiX RxxpYoKikQ2kL8wW97JfipNQUwHdv49kTwU3TmmgrEko4jKrWkxAVUStfmHqnbetUMuN y9Ng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764698054; x=1765302854; 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=xkVu8b5ZXOgCEiRhWzvnOPQSP9ZYLvl9DnUVKbBmwB4=; b=CwdmPoZ57t4zEqL+SzUA9o77q6rfN1DdXJgJKzggLt4G2NdKo9GNb/gv/GRsWrAuwm Agmzlk8GdiKBahx8Q6wXJSP7/zBVMDe2/zBGHRXYyUeAxno9fOdRHMpVY1i5QdLvbfih +SJ5IZcKMbfWIt1m/zvqHtsTSVJHZB3jbJCC5DbhQZBgOizLlSJVSh29t4TBGqJiah5q C2fer1t8S8cLA8F1l0ov+rFsRCEtUebjPE1Mif1R7NyO3lmwECX8/UsiOOfQ5drWjsD0 1UJhVcm8w+sBid3dIDLMs7WLEpvkNZZmF2V6zPniPdJ2lTtyHwLZmvkO7Oh4TgQ8J7Lp kdEg== X-Forwarded-Encrypted: i=1; AJvYcCWCXvcaxJgPF5vWxAbNV7MRjzTO3wK5p58MfbghdySNMqh3vyvOhGexm6Claz7aS5iXlyBy4CyJfS2KeQA=@vger.kernel.org X-Gm-Message-State: AOJu0Yx2LF1zeMn9oLaVJ3gasmHKxiixY2BhLjCWtrDQOu7HJeJZDSVm MwX/BC+KsLhSK6SBVYlwalDFFqEH00SOhp4G91OyKbliUU6rWYf8yM01PRPgly40ty49tYzwZCC imLOFbMHJYg== X-Google-Smtp-Source: AGHT+IE7G8f60FPONJ4cPEd8HPOCKPs8xgZYBVFFtcM6V/uJHUGNXzVcUizLGRwuJ1iYTXhmXmglEjM6z093 X-Received: from dycam21.prod.google.com ([2002:a05:7300:fc15:b0:2a4:6ed0:3c4]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:8607:b0:2a9:96f1:d2e7 with SMTP id 5a478bee46e88-2a996f1f7cfmr5115241eec.18.1764698053628; Tue, 02 Dec 2025 09:54:13 -0800 (PST) Date: Tue, 2 Dec 2025 09:50:31 -0800 In-Reply-To: <20251202175043.623597-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251202175043.623597-1-irogers@google.com> X-Mailer: git-send-email 2.52.0.158.g65b55ccf14-goog Message-ID: <20251202175043.623597-37-irogers@google.com> Subject: [PATCH v9 36/48] 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 Tested-by: Thomas Falcon --- 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 2.52.0.158.g65b55ccf14-goog