From nobody Tue Dec 16 05:57:02 2025 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (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 0F0F013E3F5 for ; Sat, 1 Feb 2025 07:43:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738395808; cv=none; b=Ws2cCY7woEUBT0cXf8hd/AJaECYjlxVlUxSNw98+4+2q4Z1QNgQreZI0GX7XpO2VqbRzjF/Wi7t6ABWnGq0KyOXLhxCuY0Gx9g4qnZ3PjVTlvZgw5BoDY+JQjITMf8VDBmHg4qi40p8eyP6uVjXZtdoQH3zZTbPtArGkXwAU2Cw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738395808; c=relaxed/simple; bh=UBYXKIGypZj9VqksZhRL9+jdxZThDY6tClK/zdZW/5g=; h=Date:In-Reply-To:Message-Id:Mime-Version:References:Subject:From: To:Content-Type; b=OQNuNK71M5HJn/sr7HXQW4NEfnSmx/G/DiUqPhr5L87D2HxkV31XdajWtSj6S4u4Gm+TdGH63GmRFY+zEUZ0xsX2WSxO8e64SY2gwsA7SIPGdMOVzjTD2XpQzFR9WAR+uEuRZqfF+fZ/Iy39zTPXVSsJcbRXNZzw+YUidAkg40U= 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=R829D2y6; arc=none smtp.client-ip=209.85.128.201 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="R829D2y6" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-6f788a1de55so19488867b3.3 for ; Fri, 31 Jan 2025 23:43:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1738395806; x=1739000606; darn=vger.kernel.org; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=AZvGhsd2oozVKIlbhhwRMg1QUNqaRs44ZEP4nrkktmU=; b=R829D2y6UrryzcP+uUb9sbNyeRznnnW+fXKMT0D3/jL+CyzYQZzHVlwqqS/c3nC1cf F25lvfug2NPgUgGuUgELLuE9AQi9qrNWwweG4IzJ4w7hi47V/YtcfP+FzrYtYCi0uRJq zIXXm5FNvwZbaOocK1L4ZJcQmvIenH1ycM0DKM9Ls4kQshYpUQV8odk8+H/T20ppTfma WqABN97zCZ+Exz5TYu/1M2F/MTGpfSH35yRuOw9tnRe6BH5b4EzVJOHrZ+BWbF3JLUoX cCx6uaKykbK1Zog4kfuJjPlij1um8jSnJ8+wMp0nnJ3Qkx5+aW2flkTf/xBaLcrSNi2B vzZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738395806; x=1739000606; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=AZvGhsd2oozVKIlbhhwRMg1QUNqaRs44ZEP4nrkktmU=; b=fHDg6bgg/N/NqNkgyW4ryR611uybZGWaH7ihekrzGrVYUUqJ6M9rTqSuj1ylyojtiA be9Zge9Q8d9bsdK222E4Hg9MKSBIhfOrzPANCb/2g+YxYMbNrynZoxdKSm/LfuMdZDMG mthWTk2N1prFLrqaRK5k8sZJayhO6GSQUSb7yEy8+Rj8FS6XsKv7jQcw8IbvaySEInmT 0oWQeZufCEA1IpVQALFuB+Cv6pOaS00tqzz876acX9BIZ9X6SIiG9VKhEVqLZ/DnVC7a 2MQfzS1Bs33pFw0KahwODejBJwvqil7/L1pqmXTlAMMEju07tML2h+5my4LPMIJdN05V 3giQ== X-Forwarded-Encrypted: i=1; AJvYcCWUsnHPiyZM6aM6FY8uljS50kTYuPY7p6Nve9lTX6KWVSH/wn5bsWSEv3S+XXjhE4VA6GmKTl23MGNu8+Y=@vger.kernel.org X-Gm-Message-State: AOJu0YxBDegOgU17+rSEJIb8HOTyxrdj711iWfXpck89n6/fynyMhm8e cZYJEZOXLAGfQCO1WUxDq7eYHyCPjELJ69I+H2+7DExm6KsyL/U39B2gWyQB8gPmBwCwZ6oKZSh 1V+fHag== X-Google-Smtp-Source: AGHT+IG5RTcIIXxZpW/Ba46+cz83cBGqX9d83Ja1q5DUVm27EKh6cq4cxXgqfkkd4ac2K7KPedVSbpxIceRV X-Received: from irogers.svl.corp.google.com ([2620:15c:2c5:11:de26:87db:e4d0:62b6]) (user=irogers job=sendgmr) by 2002:a81:b551:0:b0:6ef:4be2:ee09 with SMTP id 00721157ae682-6f7a83fd155mr315467b3.3.1738395806029; Fri, 31 Jan 2025 23:43:26 -0800 (PST) Date: Fri, 31 Jan 2025 23:43:16 -0800 In-Reply-To: <20250201074320.746259-1-irogers@google.com> Message-Id: <20250201074320.746259-2-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250201074320.746259-1-irogers@google.com> X-Mailer: git-send-email 2.48.1.362.g079036d154-goog Subject: [PATCH v3 1/5] perf evsel: Reduce scanning core PMUs in is_hybrid 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 , Ze Gao , Weilin Wang , Jean-Philippe Romain , Junhao He , Yicong Yang , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" evsel__is_hybrid returns true if there are multiple core PMUs and the evsel is for a core PMU. Determining the number of core PMUs can require loading/scanning PMUs. There's no point doing the scanning if evsel for the is_hybrid test isn't core so reorder the tests to reduce PMU scanning. Signed-off-by: Ian Rogers --- tools/perf/util/evsel.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 026cf9a9893c..4009f7d58415 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -3866,10 +3866,10 @@ void evsel__zero_per_pkg(struct evsel *evsel) */ bool evsel__is_hybrid(const struct evsel *evsel) { - if (perf_pmus__num_core_pmus() =3D=3D 1) + if (!evsel->core.is_pmu_core) return false; =20 - return evsel->core.is_pmu_core; + return perf_pmus__num_core_pmus() > 1; } =20 struct evsel *evsel__leader(const struct evsel *evsel) --=20 2.48.1.362.g079036d154-goog