From nobody Thu Dec 18 07:14:41 2025 Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (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 9B6801CD02 for ; Thu, 2 May 2024 04:01:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714622498; cv=none; b=VD0qiyhC+BIbFOTHjOyCSx3DCjdEV/JgVbdsrXZmu+D+rRRG5yXrT8itOsB4XGFc/MLwWYiT/OF2v+a5vEsFA2sbPCqpH1qVuE1QycV6NovAgT+yRsF2fpIi0aravaFm3zvpJ9J42ZpHEQTR72QAZFxbFqE1SeifPK72m69LM+s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714622498; c=relaxed/simple; bh=RiQ3QH8Mevr7c85qmwqOFnFf8n7v8w8+896FGDtfLBk=; h=Date:In-Reply-To:Message-Id:Mime-Version:References:Subject:From: To:Cc:Content-Type; b=MhuDEMjt/EuxkTAYafQnSqmM/wkI3JEDE0NcQqpJgRoahPhV03HHefV8eAiZjisa3mf1RiHQ3Ez8ScKGYjUCoAhhXRUKngVj9BNL6i8QYAHcM3Az2ROKBL4kwqzk42uWEUl60FbHLKO+3hF1Nyi7VH3aUjKTAKJr935m2V4zHEE= 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=eURM4FrN; arc=none smtp.client-ip=209.85.219.202 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="eURM4FrN" Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-de8b66d59f7so609286276.0 for ; Wed, 01 May 2024 21:01:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1714622496; x=1715227296; darn=vger.kernel.org; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=YK4M7DhO5mIJIFP1QifUvK0BbiOYwnyjSGyXVIhqvoc=; b=eURM4FrNL+rV5M5jGHtUmXebIP7s+6tV09lWMhLoOkB5oUe95jtHIZhHMSF8rOC/8a p3p61sV/fol1XY16MrcNf7uho3djCk7BMFxJD9NURm7ZeyJslSVg3clElCdP7BA1PKpb q/EaOwEOebVpdRdd+MADbQDCFdLY1wkQyjelDg9QE5jJjLu5dLFVBvWLZG8RJnsPw4Cz 8fd16JwLyVvPf7TI7gbTZh1D/BaAE8Pja7WogT838qlIu/KpbLrCPR6Bo30gxpHh4cQ3 c231EHottefKA5ZI0qvAFh/gg5k0AGs6JCovnszhmAjsW4nOGh7/S5HuDAMEN7CJXX0m 3H1Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1714622496; x=1715227296; h=cc: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=YK4M7DhO5mIJIFP1QifUvK0BbiOYwnyjSGyXVIhqvoc=; b=YTyEiVPxPArdN/f0dzUO0K7ZgxmYt/LCvd0Hf82xlNA4uI/CBXgOBrF3/5fRbcirCn 1RjCplaEbznvSm7239LIxmK4GCAOiF6g84f71z4xCCooEz7xjkJaYWr/xQoc1dtL+WGg OFRxElF2nyhImZNQ63D6dVHoasHYqRLY4QwS6MeThTlfSHs3uAvHTYI180OK8Gs0P5vw /6MH4tjTyqYlK0Lezj8lekBOuaPMrgk6pHqcJfJd+zaJRO8gaXXTDkPjmBeNMeVcDEHa L0OEySh3gVnVza9SBHtvE8YF7NR9IqG485Avni82CFLRSzclp6L+2kfxZHZTaGuD5hs8 ObFw== X-Forwarded-Encrypted: i=1; AJvYcCWtRl/G8spNLBElRRNELNu+zOG/6yajqT4n+N/JoVCMUgprm+8pI/TvpEU34iz0HONIMXb+6dU8/c6Hgg4gpKJ6Q8VzU8mQNgeypR1M X-Gm-Message-State: AOJu0YziQGz9keoQlPUBUirLr7X4fmwndm7c/BojCbE5LFXnoXSJDopA QbDV/TtJKapW4RhQaQEnq+w98wrU2NZU/fVTkO/fArcrxn1gocFN1iF1k01DqK5PS3vSOfD6uOH 59wCcRg== X-Google-Smtp-Source: AGHT+IFPc6nblxvkSStjTR2HZemwo65gYU0j5fOsBfVD2NY3SXd8R9XN1dTAVlFK+TBORZ9QnkCT8WE7n4M0 X-Received: from irogers.svl.corp.google.com ([2620:15c:2a3:200:53b9:bbda:1daa:17d3]) (user=irogers job=sendgmr) by 2002:a05:6902:100a:b0:dd9:2782:d1c6 with SMTP id w10-20020a056902100a00b00dd92782d1c6mr419962ybt.1.1714622495773; Wed, 01 May 2024 21:01:35 -0700 (PDT) Date: Wed, 1 May 2024 21:01:08 -0700 In-Reply-To: <20240502040112.2111157-1-irogers@google.com> Message-Id: <20240502040112.2111157-3-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240502040112.2111157-1-irogers@google.com> X-Mailer: git-send-email 2.45.0.rc0.197.gbae5840b3b-goog Subject: [PATCH v4 2/6] perf Document: Sysfs event names must be lower or upper case From: Ian Rogers To: Kan Liang , Thomas Richter , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Bjorn Helgaas , Jonathan Corbet , Randy Dunlap , Jing Zhang , James Clark , Ravi Bangoria , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: Ian Rogers Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" To avoid directory scans in perf it is going to be assumed that sysfs event names are either lower or upper case. Signed-off-by: Ian Rogers --- .../ABI/testing/sysfs-bus-event_source-devices-events | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-event= s b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events index 77de58d03822..e7efeab2ee83 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-events +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-events @@ -37,6 +37,12 @@ Description: Per-pmu performance monitoring events speci= fic to the running syste performance monitoring event supported by the . The name of the file is the name of the event. =20 + As performance monitoring event names are case + insensitive in the perf tool, the perf tool only looks + for lower or upper case event names in sysfs to avoid + scanning the directory. It is therefore required the + name of the event here is either lower or upper case. + File contents: =20 [=3D][,[=3D]]... --=20 2.45.0.rc0.197.gbae5840b3b-goog