From nobody Wed Dec 10 21:11:26 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 65AB22C0F78 for ; Tue, 2 Dec 2025 17:51:04 +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=1764697866; cv=none; b=rLiTDD61z8A8wqdXpx5mVLFDsFz9zFA3KBYbmOrhkwSKC9IN5sr/yNQv1ETiNFbP4B5GIy8JbyitoMdrbdOg4EW8Dm1rp8EKNcffuC+trtw5lLGhSUkJrSj9lPLHgdTR6SOkJJPrxQsa7ILEoaiIEgeuDY41JbJgJHjSEb8q7rY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764697866; c=relaxed/simple; bh=1MGEg68OAPpnEDOXdOpIbV+hPW6P24DxL9Ap9Ef0JVc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=nOO0Toin8c5s94NSsCMeNFkAP60OnB2I0yer+7wH8uSIuDDE9/8dtlH/JOmy/aCJQwECPNEeg/LQWNycA6C+QOVM4dCulNHgF7BsY3M6Osf+D1P7JflbznFtGNAkYm8pn8mEv+qM7S2BUN9nq+YX7CkojpqR1rsPiBSTKOye6Aw= 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=xu3ykvmP; 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="xu3ykvmP" Received: by mail-pg1-f202.google.com with SMTP id 41be03b00d2f7-b6097ca315bso8343782a12.3 for ; Tue, 02 Dec 2025 09:51:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1764697864; x=1765302664; 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=9j2nD9pKAg4HaspT9MBZ6CGU49fK4DzkCnN37LNxG9w=; b=xu3ykvmPkp1xiL74edEcstnUpgQDM8DAXap5rAOUthWkUN1u5qXpzGYryO0idI2FET rsAAnZ7zZBPiBWl1XzQtQyfw/JPMt9YBpI+UsXCvjPZp4po/g+LRIgA6RTAfo/NTpJat dD6jYa1+qwZUiKCeMiNnEqhP7KrvQoHMTjvY9hOCcoEbnzspKxrWgeVDqdJC3n/x+Hfk +lRFJ+O4PdQBxDhs9XBiIGtfaQdY85VWJNFp8KiQpGhTvrnEoLVALULpIo9vxXze/fWj mvnj5FdheQ/fINCAuVHv/LSUtsS8hrBFasSgct2W2H9tVAIb0AG/HWf9srzMtyfOJrog gpeA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764697864; x=1765302664; 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=9j2nD9pKAg4HaspT9MBZ6CGU49fK4DzkCnN37LNxG9w=; b=IM7ezx5Fx1AmJPhlcyuv/HhnQZb657/mZwvnB6hdojF3y9TUIzxj1iq2lhGih8kfjv zfoqsKpbtkroF/XVCdIgLV0NyT5j5E+W9gHaQjqGgFjIhvRirZ4ejCw6g2p3kgaYHcNC +n6xwT/0rr03QZ6aQGInPNxT4m4bOJTXUZVMl7xpdcL8bVTHfJQujaTcbT1u4nrF7oa4 t/HCQIbK560kBmqHZfvmbtg1h0NtFgyFEBnWZ6S+jGMqIWAXIW9y2HrpkPaykKqfXcl/ XsQCOWe/fwuj+iiVZ1V2fEVOh32vx+POeXIQsgNlqQRRt2C508OWqP8GqwqYp9rRZHOU irZw== X-Forwarded-Encrypted: i=1; AJvYcCXu+QzcU83yEIB/shwqMJ141Ng7iiwoND/JCqu96NepIfWeiIwTr/VhO2U1bXA8CpyUVomlEY45mMzcdmc=@vger.kernel.org X-Gm-Message-State: AOJu0Yx2Ol7c/p3DwcGdWWuYvXZYAkhQRO59hV3kIqcQ18TNXfrv27sN oCUtVX0p/wukZgmssOKGGVJgiLEPmjpzjYkvAtWwuQk9R7Zrs0Z9dcZ4P66DNVH8z8sS0U66vg7 SxDBWNJb7DA== X-Google-Smtp-Source: AGHT+IG9UvfE78E1OdBtiqQkaphk9mKjtLJwuhCfyL1TztsqLedsiK3sZFbFmUdXc5+L2ln2AzEOp5wGyNYM X-Received: from dybqr10.prod.google.com ([2002:a05:7301:608a:b0:2a4:7c1a:3e18]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:50ef:b0:2a4:7fb3:7a96 with SMTP id 5a478bee46e88-2a7192d82b0mr23551111eec.36.1764697863587; Tue, 02 Dec 2025 09:51:03 -0800 (PST) Date: Tue, 2 Dec 2025 09:49:57 -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: <20251202175043.623597-3-irogers@google.com> Subject: [PATCH v9 02/48] perf ilist: Be tolerant of reading a metric on the wrong CPU 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" This happens on hybrid machine metrics. Be tolerant and don't cause the ilist application to crash with an exception. Signed-off-by: Ian Rogers Tested-by: Thomas Falcon --- tools/perf/python/ilist.py | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/tools/perf/python/ilist.py b/tools/perf/python/ilist.py index eb687ce9d5a6..0d757ddb4795 100755 --- a/tools/perf/python/ilist.py +++ b/tools/perf/python/ilist.py @@ -77,8 +77,12 @@ class Metric(TreeValue): return perf.parse_metrics(self.metric_name, self.metric_pmu) =20 def value(self, evlist: perf.evlist, evsel: perf.evsel, cpu: int, thre= ad: int) -> float: - val =3D evlist.compute_metric(self.metric_name, cpu, thread) - return 0 if math.isnan(val) else val + try: + val =3D evlist.compute_metric(self.metric_name, cpu, thread) + return 0 if math.isnan(val) else val + except: + # Be tolerant of failures to compute metrics on particular CPU= s/threads. + return 0 =20 =20 @dataclass --=20 2.52.0.158.g65b55ccf14-goog