From mboxrd@z Thu Jan 1 00:00:00 1970 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 752C1172BCB for ; Thu, 2 May 2024 21:35:11 +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=1714685712; cv=none; b=DGP4knukaiQ6ydkb0ioBMD7LDlaKYUz5zKxcumoMAHboFkqIlpMLyi4Xlx6fgJNJWbw6koJUawkYX5A2VQAcL2irXUmNg7xQrQWDU4WVW4hwMXIRT4P/fiobIUEiyg9o+hmIegq7WYKdVkxdf194eMIzvx/s8TY1kI0B3agiQgU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714685712; c=relaxed/simple; bh=qOgLBJE0LE1Qr7V8zbAlCdL72iO5CLfA0xy5a53x4LI=; h=Date:Message-Id:Mime-Version:Subject:From:To:Cc:Content-Type; b=ssOVhQLDejVjAcWhFXyM5ZLWcLp70hvns+Lo7Kwg26ZCfaMFA5BUlYU0YPUGSylWyckfALKhiZvCffsoHk/9veLCLGBPLsnHaNtgQtuSreO1L0U+9zjqqQCAYV2dioUDM2ZZju7uaOpr8cbHUyqnUCPSwvZ/oqMg2+UBmXQD+to= 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=1XTZgOrN; 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="1XTZgOrN" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-61be5d44307so74016147b3.0 for ; Thu, 02 May 2024 14:35:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1714685710; x=1715290510; darn=vger.kernel.org; h=cc:to:from:subject:mime-version:message-id:date:from:to:cc:subject :date:message-id:reply-to; bh=qhcKEmyfJmzka3bwh2Qr09m8V19zJ3Gs286JpGC5N+o=; b=1XTZgOrNjFUvpVRbHLdEX7DGDSuxZcwzf/5IOHccKUyJNkeoyOWwMljyhlm8UYK+SV 7vUif011PsTC8oNFa4ETVazH9Q9902SV6opuCFLvLWvRFSceoV21tnSMpdD5I5QkV83i yfvV/BMWOz3Q2xVTOc7D1E53RoQ81yJReVxDGmwJzOWm3Ir95v9dArQOqnvhxVZqCzvA IkydHz6Qbf61jMS2g1ip+fje4ZBmBqHL9IYxpc7k3wMbXELxPvcVnl1ARM6BHGG3NLtK SNxTChTBwmwQT62PSym3b/n6SUCyXCHmxI+VoAaaCxkyUz9JzC8VOeWhg1CAYD9h2ckH lsuQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1714685710; x=1715290510; h=cc:to:from:subject:mime-version:message-id:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=qhcKEmyfJmzka3bwh2Qr09m8V19zJ3Gs286JpGC5N+o=; b=uCZxXiYLNL+CxTLFDXQimKb5Y22tlFVGz2nhgtvmxL2unjKhnbAdb4AOpVL2oX09hT 9iPoQHXMd16RS5h34UizRmhlWqqKq+koHF86vEGnmwccdwP1jfucHQE8rXZPYYemLDpD TGhhKYWeJ5cEvdK8Y+a8da8F/TUCVNz4JJemyP73zrVgduWxaS8cr9hJ9zQXXUAATo0Y QWHBPOLVVGy597YaQj3LuMr5+MEBcWVTCCl3CrR5ISFtdnX9+9vFTT4UVxKWQwaEYGrN q1RfNe4PLJmTRMGDb5MHIGVCo5lT9KAdB1kYVq7tTdKiS66/tYETe+H71A3yaApB1kc/ bPEA== X-Forwarded-Encrypted: i=1; AJvYcCXFM09e/YcuZBCa/Jh17QSMLs8QOTEOBspzelb/F1gcmhnfpasbfD/RsSIugKXB3NvuXgUKI08XpGZQNqeZzaoqWaGA7ckvn48VPgRL X-Gm-Message-State: AOJu0YwVFFeL3LcrvCqRQyy6uVtxp8YGa0JF1dtJ+tChXK5v/QalI2cs HPXjcy8VUc+l8MdQJj/oUc3y+wc1yr9498gVGTd0irk/11X2knp66dowtIyUuXldsKcDzkeDr+I YmgA48A== X-Google-Smtp-Source: AGHT+IHipT/3I7TZPtQNOU5cK7w6gazz2EG7ggZtHX90TFERJA9kLwPfsnpZ/IISO+pyZI7y6ke7invIO6vO X-Received: from irogers.svl.corp.google.com ([2620:15c:2a3:200:deba:378d:2d3a:2641]) (user=irogers job=sendgmr) by 2002:a0d:d84b:0:b0:611:2c40:e8d0 with SMTP id a72-20020a0dd84b000000b006112c40e8d0mr156843ywe.3.1714685710542; Thu, 02 May 2024 14:35:10 -0700 (PDT) Date: Thu, 2 May 2024 14:35:01 -0700 Message-Id: <20240502213507.2339733-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.45.0.rc1.225.g2a3ae87e7f-goog Subject: [PATCH v5 0/6] Assume sysfs event names are always the same 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-Type: text/plain; charset="UTF-8" By assuming sysfs events are either upper or lower case, the case insensitive event parsing can probe for the existence of files rather then loading all events in a directory. When the event is a json event like inst_retired.any on Intel, this reduces the number of openat calls on a Tigerlake laptop from 325 down to 255. v1 sent as an RFC: https://lore.kernel.org/lkml/20240413040812.4042051-1-irogers@google.com/ v2: addresses review feedback from Kan Liang, by updating documentation and adding tests. v3: incorporate feedback from Thomas Richter that s390 event names are all upper case. Do a lower case probe then an upper case probe, make documentation and tests also agree. v4: add checks to write (kernel test robot) and fix a typo. v5: Add reviewed-by: Kan Liang and fix potential uninitialized use. Ian Rogers (6): perf test pmu-events: Make it clearer that pmu-events tests json events perf Document: Sysfs event names must be lower or upper case perf test pmu: Refactor format test and exposed test APIs perf test pmu: Add an eagerly loaded event test perf test pmu: Test all sysfs PMU event names are the same case perf pmu: Assume sysfs events are always the same case .../sysfs-bus-event_source-devices-events | 6 + tools/perf/tests/pmu-events.c | 2 +- tools/perf/tests/pmu.c | 467 ++++++++++++------ tools/perf/util/parse-events.c | 2 +- tools/perf/util/parse-events.h | 2 +- tools/perf/util/pmu.c | 111 +++-- tools/perf/util/pmu.h | 4 +- tools/perf/util/pmus.c | 16 +- tools/perf/util/pmus.h | 2 + 9 files changed, 415 insertions(+), 197 deletions(-) -- 2.45.0.rc1.225.g2a3ae87e7f-goog