From nobody Fri Dec 19 17:35:23 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 D57371420C8 for ; Mon, 29 Apr 2024 20:02:43 +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=1714420965; cv=none; b=Cvs2yj1LvLMn7JOz0GmTjb8k1n/7JO+ydb9ORUodoP1W37O6OtoZm5uY4Sb0ZQOD7y2/1nJp/742DC77UfIB96zEL0YQ8xdD2dOZknGx3XtE0K3NSVSyJMjR0L+/zevWGpKsnKCrh3X3ljMCl6Hg/xanSubqLJWsUXUtKBvxXNs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714420965; c=relaxed/simple; bh=r6Q0nzWd1ZDsObAExwG1cgxL3ocuqsKb/0LPlEHr6oo=; h=Date:In-Reply-To:Message-Id:Mime-Version:References:Subject:From: To:Cc:Content-Type; b=L0Yb6u5ABQfMbDvcwsLw5362jnbKoV5DpxyL6PAqz4WDiagScZdb7BbC8jDitNpDGJHLuIEgnCyGgwqu2IgRpAjyHcgrnz4TPC1GTbj6zAdTzbN1hTy/xvTaWIDSK7N6pQif71vgQfvcu0JuNornDNsTp3LO2BakdzBuud8kjz0= 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=ovhFGgAX; 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="ovhFGgAX" Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-de5a8638579so5807653276.1 for ; Mon, 29 Apr 2024 13:02:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1714420963; x=1715025763; 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=PG3MsFbzKXuMYVhzdetV6dfQOniDDSPTL8GyKyGGWq0=; b=ovhFGgAX6TmrLu2MF3CS/BJ0x3w+AdBj1m/zWBec2ruFTX1dXO4KnoA+pwOzYoWhmS DF5YSp4VFwW/FmgBbREGuLN0fsFahJPpBINbOnFEo0AMeOt+Hpez2STWWp2lhOWNU18D wpjaDMvwyrgdDwbrEXMVEIFNh5fLbn7R2ZHmUIzbolPY6uYFgpfKFX9UA5rskDIoJguq pkKuXUQrIMR3dU3RlQ+fmj6CdHtUWOuzVx5HBV7lk6mO5A9W0xt5UqeIOhFw5YWBPjP+ SOnhGvXxyI4dTx6q7KCmjMymXiUiObvMu+UAzUarLdnnZ7Ks1v9PktLxiwd+C9H32Eyo LNOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1714420963; x=1715025763; 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=PG3MsFbzKXuMYVhzdetV6dfQOniDDSPTL8GyKyGGWq0=; b=pwCvt1XQ3UD/VvDI/8WDL0OsWaUp9smbt0i8+J+vXWo0J+8ZVV2mFfEJ6ZUdZmrebD rWYg3pJGfojbAGn/+QwyQ4MEgSM6ZbatIVUj4Lr7fonPV7oBwn9f5Kt9AwZL8T9LFZXs 3lGBifm7E8in0jEk7pXmQKaq1FC1VId7ZK9QlyFh5M72t6mzOThRadDYoaMYA2/gICoQ L61YUXz9ntr0rqPFiymiCJgyyY2qQ6j2hyVfMzhP0wi7w/Al8wflVywV3lM6eXDPkmkY qX7vBpAynrGerh82dAz4Sjx+MGrOGOak3ApULY93/zKluYO1S1YrPjn2ZkNRPIUteFTh tyoA== X-Forwarded-Encrypted: i=1; AJvYcCWHrclO3co2TXm9A8B7V8+xLNTCsweeOntDic7JkjHXFdPdqu/EHpbXEjT4Zeyg5EtqZ0LhgygNscXO3fgaSDS5wfSNu2nEJtRN3qg9 X-Gm-Message-State: AOJu0Yw/OevF541lrsyCcwnMXeRn6VyZmj1a7ggXYCAsTNITjmxR9750 bIFWJ9LYKb8EvgKdMO1FCeSeMD7LXbP+ssEIawGGlb4SMoHzWHeNjfl3uVS493k3WzC1usiHnjc 8/Foz2g== X-Google-Smtp-Source: AGHT+IH7v18SP6SyNvViyH58YP8Uh+9qXPeg/EpSjD89cxZN5TRvsLnjH+Am76ywHnuHqGFQl4RUJD7Y7rZS X-Received: from irogers.svl.corp.google.com ([2620:15c:2a3:200:c137:aa10:25e1:8f1e]) (user=irogers job=sendgmr) by 2002:a25:ea44:0:b0:de5:53f2:f614 with SMTP id o4-20020a25ea44000000b00de553f2f614mr66567ybe.12.1714420962772; Mon, 29 Apr 2024 13:02:42 -0700 (PDT) Date: Mon, 29 Apr 2024 13:02:21 -0700 In-Reply-To: <20240429200225.1271876-1-irogers@google.com> Message-Id: <20240429200225.1271876-3-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240429200225.1271876-1-irogers@google.com> X-Mailer: git-send-email 2.44.0.769.g3c40516874-goog Subject: [PATCH v3 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 2.44.0.769.g3c40516874-goog