From nobody Mon Feb 9 12:24:15 2026 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 99900346AC3 for ; Tue, 27 Jan 2026 18:45:34 +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=1769539536; cv=none; b=jASWGk4+xwT+dLq6xbl2X8Y1n4XqP2xxphhW7+JPMqo/8Jf0MBTnGVIcm9hDcdM6vjkijwISEYvzkdpDeb4VIiNwnaArxr8P0AQZ22Sa8/TTsALyCHXh6DJj6QDWdrVkOONCQjk8x/fv1SvfApSx96UvwYibUXNGGaivN09SmCE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769539536; c=relaxed/simple; bh=y6hlwpTyHyOifmLqzqFarB+CugLw8uac40XfiztNF7E=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=eXn5yNc3TiD+wOUhUQN659xgOo/GsGMl9zcDzAXRcXH4DYFJ0VGx4QDvHuX+PuYpJSxk0TYwiLy5jNJpMAYIN1SFtPFIFVRwsTmJutuRZAgCp6VbiU3joA+oL2z6DOEuzlH0RVd8of00ecVyI4bRg/XgQL5Kl0ucivhzhlydgIo= 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=gl860AFn; 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="gl860AFn" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2b6f0b345e3so32180575eec.0 for ; Tue, 27 Jan 2026 10:45:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1769539534; x=1770144334; 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=Vi5rn8mItqo/t2QexpWzl0At3V2hkxYPVO28WOkSCSo=; b=gl860AFnD7poKzs1aaF9TeU63uSr+tYofAQ0Ma2NVPvyeJ38xX8FLqMciTzDgzlceA jrk/yUveVLmU7W8L9blPttrK506IBbUWpk1/r/eLJBdkhlfOPt7Kv2cdZKY2J3p68ebr e6FGo24DYNJC9w7RDjFHZf0tr+QYzTE1KUXL8ki1K/UNsrG7OMcmLSGpyLW+8k58g/oB NR/65jALrrdHqGZjEALVY42l9Aen+sLZz8T0wYtFiuQrd2h6WeCGUcBghdueKkC+wHeZ 77Hz5euL6cCrwi6hy3XVHQpWcAa42kr/J5qTtGMswiRJFCL7S/aG3UAGaQD27w0h7c7B YmaA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769539534; x=1770144334; 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=Vi5rn8mItqo/t2QexpWzl0At3V2hkxYPVO28WOkSCSo=; b=e+FpLuFIeUFweVHzlQMsU3LFVB05eRr3HieZA7R02lCkAkMpgfouJ62G2dSeotdtKa 7cDspmMhZRARXWsUcHYExzQ+crZD2P+ope6SVG3A5aEpQCWTxAykFF8/LdyC+uMHBIBC whPhfbCan+3YIxjm8cu6kwmA2E3wJn1MlhgzY+18Yzu/zOAr+hY1LgE3TrjW6ca7SJMh 8LCzh+Xt7zvlpGluOjJHHqNurWGg3D8CpIv0R99V7dlDiY97voR40fr5vba23+dP/Tvc Q+Ngm9l7xYeC1bEoeazwfkiexBE+rsLS2rc2RadgJVV03F3SWup0GRSmBAmIXuxJ09jk opAw== X-Forwarded-Encrypted: i=1; AJvYcCUjt0TwIH7l8gs2aA4BB2t1X1HEokqdo9vfzBtViav1RYQf3QgWvEtoWJ+U/qJiG6/Duz1X31FAQjJ0DJI=@vger.kernel.org X-Gm-Message-State: AOJu0Yxdu1BlUwnHcNJ2s7L9Iz3EJfehj32IP8t+8QoIMVrBD+LvUqzt dTV4xBs0OdHxKGCFCbeSjwFwm92aIdXIz0gBMc8eX+AguASkDx6Ynff6kGolyOaysawRIT90Hfp +pHryiEzS4Q== X-Received: from dlbui15.prod.google.com ([2002:a05:7022:3d0f:b0:124:a6fb:f902]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7022:1283:b0:11a:962:99c2 with SMTP id a92af1059eb24-124a00c5619mr1796958c88.38.1769539533625; Tue, 27 Jan 2026 10:45:33 -0800 (PST) Date: Tue, 27 Jan 2026 10:44:35 -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: <20260127184506.3059493-5-irogers@google.com> Subject: [PATCH v11 04/35] perf jevents: Add idle metric for AMD zen models 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" Compute using the msr PMU the percentage of wallclock cycles where the CPUs are in a low power state. Reviewed-by: Sandipan Das Signed-off-by: Ian Rogers --- tools/perf/pmu-events/amd_metrics.py | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/tools/perf/pmu-events/amd_metrics.py b/tools/perf/pmu-events/a= md_metrics.py index b6cdeb4f09fe..f51a044b8005 100755 --- a/tools/perf/pmu-events/amd_metrics.py +++ b/tools/perf/pmu-events/amd_metrics.py @@ -3,8 +3,9 @@ import argparse import math import os -from metric import (d_ratio, has_event, Event, JsonEncodeMetric, JsonEncod= eMetricGroupDescriptions, - LoadEvents, Metric, MetricGroup, Select) +from metric import (d_ratio, has_event, max, Event, JsonEncodeMetric, + JsonEncodeMetricGroupDescriptions, LoadEvents, Metric, + MetricGroup, Select) =20 # Global command line arguments. _args =3D None @@ -12,6 +13,16 @@ _args =3D None interval_sec =3D Event("duration_time") =20 =20 +def Idle() -> Metric: + cyc =3D Event("msr/mperf/") + tsc =3D Event("msr/tsc/") + low =3D max(tsc - cyc, 0) + return Metric( + "lpm_idle", + "Percentage of total wallclock cycles where CPUs are in low power = state (C1 or deeper sleep state)", + d_ratio(low, tsc), "100%") + + def Rapl() -> MetricGroup: """Processor socket power consumption estimate. =20 @@ -57,6 +68,7 @@ def main() -> None: LoadEvents(directory) =20 all_metrics =3D MetricGroup("", [ + Idle(), Rapl(), ]) =20 --=20 2.52.0.457.g6b5491de43-goog