From nobody Mon Feb 9 04:03:47 2026 Received: from mail-dy1-f201.google.com (mail-dy1-f201.google.com [74.125.82.201]) (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 8B9451D45E8 for ; Tue, 27 Jan 2026 18:45:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769539549; cv=none; b=dqMdwQfZiutiVzQ9abSaLgon8f8QadP6n8mWjeFwYEj1mPkhe1hvZHGksARRW64O/gJopffs6rN7qLZp9OvISMfko6Gz7cpDhNmvQqFajnx14U1Tgowg7R1YeRIaaEt8A4S1/G5CQwe1rT6sh88h38bRAcYCsSU7NficWvCw+EI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769539549; c=relaxed/simple; bh=jGvHnBOIRlpXNzPDylmnrl70NxmK3iS0ZSa2PimW/OY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=aQyfD1Du0R41hWRMHysZRKHS6z0+B/aCUla8n+voeRTf9ne0d8UYM21CFtJpiVYf01Xv8hJjjTXM1kmRcYwejKAx3PilzeOgFW07lhf2tjHSzyw/ZVjuZ5VKb4T/ybFZ+pWLBZJlbweDTzmQFIKqRGSIIFpv4D5OtkdQ/Y5E7XA= 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=Jnv4Werr; arc=none smtp.client-ip=74.125.82.201 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="Jnv4Werr" Received: by mail-dy1-f201.google.com with SMTP id 5a478bee46e88-2b724ff60e6so6241810eec.0 for ; Tue, 27 Jan 2026 10:45:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1769539548; x=1770144348; 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=/bQwBUeqFHmxPyvU6W3Kgyx2XHVX/3kNh3j54lLQrKs=; b=Jnv4WerrqrEB+YsRRRIJD7QS5NPatx5Rb+QBuP2d3EVlFHVjqVm6k/iQ8Fn5Kutw07 EuzHMlXG7WfjV+cWT4MvjYr1nQWKZqCrEJuwh1/2Y2EW7DwdWOm5+05hZQJgVF4FmzQ9 XaymvYzYFhURhy3Xim1ZihlCslpvYXphMQxPHEf1V9GVEP+X2xPCoCkPye8CbvlGJP87 aTBuEeitDpGklT3u1J/rWriUwmuBmqduPvmkWuaEqv0FWs3PlXdWKBjJPNQCeyg1EGoS 92rU4RV/Fz19/7vG/v4IWBUwYEvpVLs0lEqCXcl/uwBCk1XUjKdEvepBhUDMuxx9zvfU aXrA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769539548; x=1770144348; 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=/bQwBUeqFHmxPyvU6W3Kgyx2XHVX/3kNh3j54lLQrKs=; b=mnFB/d+bTmNaHmcXSnT79OR4wVWemjhJCnFgUdgsFFWCTjE7cJDgsJ7PqqLB7TbhNL zkQEm08xFmKGsxMRTN4dkf5pguLx8Boe6RTVoiMI6OZOJRWl6vS5QR43w8Lt9WHKqCL3 V4Yp3YnUgVq1B3DcwGGX7rUOv+4X38DttTvdgi3Y7GIBIIkId4b9aXKTKSY+YSYI25vb XgvpcTgnwF4By1xRm3bbYWM3aaJEjCc79xdx4drsVIdcaQvsfXtr11INLe/z86Suv44N m75/dOV8CzjsPexujJpjmaP6g+kEIbJEFV5Se+UP8icUrhCwrZHO3HShC748DlOsb3g2 ytsw== X-Forwarded-Encrypted: i=1; AJvYcCX8NdJWncRJhFkm0RgMo/u2syLGi1L5VOZ6HLpixevUoB6gnS7gEwBwO2HWbKCg0XCea+/hldtaBN57Fdo=@vger.kernel.org X-Gm-Message-State: AOJu0YxhWIyuE4YDFEd94mQpr1/G02p9mdtYBnQizrUMj0IPkUm4qwH6 EtXVsAXvDErz/2y12lM3QCsalEjKpH0UirxENbwlUbxWbZ/wSFwHyRJElxTtvcgLEaIhgs7sxT2 wA0uieV/B4A== X-Received: from dyt2.prod.google.com ([2002:a05:693c:8082:b0:2b7:499d:745f]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:e80c:b0:2b6:b23b:d488 with SMTP id 5a478bee46e88-2b78d98df7dmr2125109eec.25.1769539547575; Tue, 27 Jan 2026 10:45:47 -0800 (PST) Date: Tue, 27 Jan 2026 10:44:42 -0800 In-Reply-To: <20260127184506.3059493-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260127184506.3059493-1-irogers@google.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260127184506.3059493-12-irogers@google.com> Subject: [PATCH v11 11/35] perf jevents: Add context switch metrics for AMD 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 , 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. Reviewed-by: Sandipan Das Signed-off-by: Ian Rogers --- tools/perf/pmu-events/amd_metrics.py | 33 ++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/a= md_metrics.py index b3de74babe40..83e77ccc059e 100755 --- a/tools/perf/pmu-events/amd_metrics.py +++ b/tools/perf/pmu-events/amd_metrics.py @@ -122,6 +122,38 @@ def AmdBr(): description=3D"breakdown of retired branch instruct= ions") =20 =20 +def AmdCtxSw() -> 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")) + + ev =3D Event("ls_dispatch.pure_ld", "ls_dispatch.ld_dispatch") + metrics.append(Metric("lpm_cs_loads", "Loads per context switch", + d_ratio(ev, cs), "loads/cs")) + + ev =3D Event("ls_dispatch.pure_st", "ls_dispatch.store_dispatch") + metrics.append(Metric("lpm_cs_stores", "Stores per context switch", + d_ratio(ev, cs), "stores/cs")) + + ev =3D Event("ex_ret_brn_tkn") + metrics.append(Metric("lpm_cs_br_taken", "Branches taken per context s= witch", + d_ratio(ev, cs), "br_taken/cs")) + + return MetricGroup("lpm_cs", metrics, + description=3D("Number of context switches per seco= nd, instructions " + "retired & core cycles between context= switches")) + + def AmdDtlb() -> Optional[MetricGroup]: global _zen_model if _zen_model >=3D 4: @@ -438,6 +470,7 @@ def main() -> None: =20 all_metrics =3D MetricGroup("", [ AmdBr(), + AmdCtxSw(), AmdDtlb(), AmdItlb(), AmdLdSt(), --=20 2.52.0.457.g6b5491de43-goog