From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f202.google.com (mail-dy1-f202.google.com [74.125.82.202]) (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 BC37C32937E for ; Thu, 8 Jan 2026 19:11:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767899512; cv=none; b=u7MBSC2/1nWDCHWHmONTbF61E6kJTdgvnNAEH1AsOKUEUF8HPXoFEWkuoT7qtXfsj3Z4tf1UuiijbEifpXOD+caBFPStV1fXp0zun+e6lwWokjFnuVs5qdob/LOFRcvbDQ+NXcRPta5BWSg0aeqR/Hvl8HN660HWHyAW8Kc4fg4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767899512; c=relaxed/simple; bh=jGvHnBOIRlpXNzPDylmnrl70NxmK3iS0ZSa2PimW/OY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=HvqTBIyJNhN0tv+/s8BpRfjjiGtxXCAXpzcUI7JZkMSdPUq+fpIWNWtUAw5S8wl8vg2VJrUIdztX28rvtD95wYwO2CdOBEXJ4KO2vtiQz+rOKpXgtjcWBE2w2QCV4UDDf7N6SsivN4J8lCJjMtYIPcrw0CDCGWPkAIYp1Zo7qIo= 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=H5yymHJH; arc=none smtp.client-ip=74.125.82.202 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="H5yymHJH" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2b048fc1656so4084114eec.1 for ; Thu, 08 Jan 2026 11:11:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1767899507; x=1768504307; 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=H5yymHJHc7HxV0g2ZJuYxx/sCwQDm2ytfyzrxGPmtsdw+ZBDDAB/D28/IVEt849CWy UrZVjCnLZGFMt+o2p+RMiSh0H771g9v+VUwHFPtTv9/cJfcUVfictZYWd0e5vUyzspGd y5En87YlOuqgm5MYZF5NAJ65BZHpBLBavu58RDtg4XDZmrpeZysU27xrZ8lxCV8SJee2 pAdwN1vwCxTtEI/mFDL03uA9QCQJ7gZJLKqhfhBU0SPdfJIfLQ0/oGkqczOJLZ0BRhc6 xU+b2sv1t+HiSJKj4e+7TfSTb75gznwkW1c4DXOjj8O+y/xGqKLcTtrI5HmxFhO1y6XL /qhA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1767899507; x=1768504307; 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=J9OAYRDnPHgqSFyLWXy3rBuJp1joB12GTs/954Ic+idJpgmjqPUF9Vd4rVGkoGi68D 2vvL77iRoZ3ZPwAEuj44/lZ2Vod4o9VT32i+vOEwrLQquuAZESuFMAvqyPc48eclifDg bHV+GstEBWtJCRu8aupyUef1pAHnAuQgzquqB494Gb+07rwg+xN0qJ7eDypIA9xZBL/f IfZYNEn1tB/rAQF0+RZUYAQi8cY3eqxdXUOyxO10xmNcqroxZ/arOIz+VsTFiHrkhhdr y5gOZ8C66QLS/gPGFq8DshQi1ZNyPcPWEKu5/zHo+JrZ37v8PfpF2aWjM8A7cL+e1+WW pmjQ== X-Forwarded-Encrypted: i=1; AJvYcCWDG+rW9mXOdWxpf3kqAslmrz587wqa+kQy+WRiDJ7kSeXI8AfVWDUOuYHQ3/4BcHx7NyY35zk8JYEqeky3AQg4@vger.kernel.org X-Gm-Message-State: AOJu0Yyrd8RfU4fvzxUfFdHpx0YULhFmWVpn8nvaMwHau3g4iwAW7Fra 5ahln6OYTivGs9tzbdd7O/tXx9RN2u07nRZjM0+ffN3mKcPPoGsTtAmKB/qx8ZOJtq//psZJqB6 UUDx8LUdxug== X-Google-Smtp-Source: AGHT+IFjJOwZKFxZq+U+vVCmQ0zJZVODmFqQt9C3sBwElvfkzCtXeH6OONG0DU7+z2ReYxNDQwNpM5U6h80R X-Received: from dybny40.prod.google.com ([2002:a05:7300:e828:b0:2a2:2846:c513]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7301:5f0b:b0:2a4:3593:9695 with SMTP id 5a478bee46e88-2b17d23527emr4508241eec.18.1767899507250; Thu, 08 Jan 2026 11:11:47 -0800 (PST) Date: Thu, 8 Jan 2026 11:10:41 -0800 In-Reply-To: <20260108191105.695131-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260108191105.695131-1-irogers@google.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260108191105.695131-12-irogers@google.com> Subject: [PATCH v10 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 , Samantha Alt , Sandipan Das , Thomas Falcon , Weilin Wang , Xu Yang , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org 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/amd_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="breakdown of retired branch instructions") +def AmdCtxSw() -> MetricGroup: + cs = Event("context\\-switches") + metrics = [ + Metric("lpm_cs_rate", "Context switches per second", + d_ratio(cs, interval_sec), "ctxsw/s") + ] + + ev = Event("instructions") + metrics.append(Metric("lpm_cs_instr", "Instructions per context switch", + d_ratio(ev, cs), "instr/cs")) + + ev = Event("cycles") + metrics.append(Metric("lpm_cs_cycles", "Cycles per context switch", + d_ratio(ev, cs), "cycles/cs")) + + ev = 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 = 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 = Event("ex_ret_brn_tkn") + metrics.append(Metric("lpm_cs_br_taken", "Branches taken per context switch", + d_ratio(ev, cs), "br_taken/cs")) + + return MetricGroup("lpm_cs", metrics, + description=("Number of context switches per second, instructions " + "retired & core cycles between context switches")) + + def AmdDtlb() -> Optional[MetricGroup]: global _zen_model if _zen_model >= 4: @@ -438,6 +470,7 @@ def main() -> None: all_metrics = MetricGroup("", [ AmdBr(), + AmdCtxSw(), AmdDtlb(), AmdItlb(), AmdLdSt(), -- 2.52.0.457.g6b5491de43-goog