From mboxrd@z Thu Jan 1 00:00:00 1970 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 ED0C926C391 for ; Thu, 4 Sep 2025 04:41:16 +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=1756960878; cv=none; b=GXJoHGcHZe745UId/Dy+lgwWmxz83secS694FVWNu7cA6R8H3TD0f8wpWIJeK42STDDKKOFFzflr06dE8+TEDzOsprGYAjs88Wwegr7v01JntaG4YeM2Xp3PQKfkyyoF+RlnVvjHAducWPDnRAqlMkAks0cGzVcHOVRX9Kj3ha0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756960878; c=relaxed/simple; bh=DGrU1rY5HwKPFf/jKSY3EHnF4vVKF3aEB2+Ri1iicow=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=hOJzIFDX2WBBOHWYWg5KD/vS8gJgFqjV0vXUjD70wqGMX072zych/IAhFDKAuj+G+WwNHA8f0OH6doiP8Xp815CeXqC+BdxGYbZAxV7B6MydTn/qo+RIY93ebUCvlu/NWDMEGdpN5wmdjbl9jPwdOGYferPxQ+UHZUYT35Q6Mk4= 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=XB7yMj44; 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="XB7yMj44" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-244582bc5e4so8073565ad.2 for ; Wed, 03 Sep 2025 21:41:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1756960876; x=1757565676; 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=Dc8J/lSfrT/Zse7jOcyUvktlEEeGzgdaoDiuhDp7bGg=; b=XB7yMj44cFxs5V+UqD5BMuBhsFExfm5RoVDktmRaCuHYoylZY07f15LPg9apKAU6tw kaC4qGmvZgMY73Pdxpcb5U13sAvDp7XJOdbzfFOaNBX81EZFW5omRAWq8Ns5g2M/I4DC +f6VtTlsbRjXHbeL6s5YcG7g178K/CDp8sDwap254qzJ7fQBj5Exmxzmg24SURTx4Ghw Ys0obb+xrrwQbU1r6caLnZLhiJnmqdzsKZHiTUc1gCYaBLacqxDg3hGQ3XF7cjquWrcq PbVucYYExKUsxiQZOLlzpsX3SNUR88sZ1FKKMOj+l2VL8xM3nnKZj8RA8BbP5j2UmTaa OlPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756960876; x=1757565676; 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=Dc8J/lSfrT/Zse7jOcyUvktlEEeGzgdaoDiuhDp7bGg=; b=M1NNn0hvg4NFwqzlxxlzdxMxhEpGhyUxnqjLVYzc/DMgbVP6znU0TMKU0Be2uv4Vmg D/25mdl1lk8xMkjL2wCFgvE7fRM/trYAhygb1dhZFYxR2dVsximJCivqclsL9zxn8Fsu m7ccSCPwwxyOCQjdw8A2Tdsh6hS2kQflUFgs2/I47hN1xqkyqQ2IP13uoF00LS/y2stT zTTAU5zLD/rc+/87E1ufSVuif5jZLX/wjmu5cWsT3G5NMvuhgYeBQiUnmgyOIeSljorx kY3GuGqpm08WV9h9LvQxqpTqKbArhIHZXRiG1UmGyl5tq0mVPjZUx21LwLriJ5C64y5W 27tg== X-Forwarded-Encrypted: i=1; AJvYcCU+ZpMg/SFuaAQKCb5QYxqFW3ICCARFCXW9TqTa5AbV6R8JYZg3ogro/w0vlvtpJyk08TQdDxggoAxAr3E=@vger.kernel.org X-Gm-Message-State: AOJu0YyOfuYInHx4zesOyjpFE2b1ie/mhvY5totLzsfYmIkAwThuZcVD GG4TjbjM2GaHg/dGiLOPZz5GHWJ848ieFuxXaYIyVR3TSj/vU2eOyBddN+teyN8K4sSCOgN0usy 0WnPWLGfIew== X-Google-Smtp-Source: AGHT+IHPmc7iwLBJHkLwlvpUXlXB1HQEMNXkq93kwZbAReOSDquHWYNpl9VKjtBZ0JeiLgPQf/c0bawYvYvA X-Received: from plbli6.prod.google.com ([2002:a17:903:2946:b0:24c:a22d:44d3]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:32d2:b0:242:a1ee:6c3f with SMTP id d9443c01a7336-24944871fa4mr187409025ad.4.1756960876363; Wed, 03 Sep 2025 21:41:16 -0700 (PDT) Date: Wed, 3 Sep 2025 21:40:46 -0700 In-Reply-To: <20250904044047.999031-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250904044047.999031-1-irogers@google.com> X-Mailer: git-send-email 2.51.0.338.gd7d06c2dae-goog Message-ID: <20250904044047.999031-13-irogers@google.com> Subject: [PATCH v6 12/13] perf jevents: Add context switch metrics for AMD 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 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/amd_metrics.py | 32 ++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/amd_metrics.py index 6f1259796c8d..a782e41dedca 100755 --- a/tools/perf/pmu-events/amd_metrics.py +++ b/tools/perf/pmu-events/amd_metrics.py @@ -120,6 +120,37 @@ 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.ld_dispatch") + metrics.append(Metric("lpm_cs_loads", "Loads per context switch", + d_ratio(ev, cs), "loads/cs")) + + ev = Event("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 AmdIlp() -> MetricGroup: tsc = Event("msr/tsc/") c0 = Event("msr/mperf/") @@ -619,6 +650,7 @@ def main() -> None: all_metrics = MetricGroup("", [ AmdBr(), + AmdCtxSw(), AmdIlp(), AmdDtlb(), AmdItlb(), -- 2.51.0.338.gd7d06c2dae-goog