From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f202.google.com (mail-pf1-f202.google.com [209.85.210.202]) (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 0FA2C18DB14 for ; Mon, 12 May 2025 19:46:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747079191; cv=none; b=VTeQ1sJNZFH9e0pM/hBim13dUpDt8EF7HmUiLQUmZNLCugmTFpxbJ+mfMBJb75e9P1srrCetN/wc3a0/zxdL5sUl1li3qJLlfPaS4KY9e/hRqKABWQhe2+HPjeOLvrFne+KNP8k5Uu++kSUw9TFy+UlRZEgSK4K3YWzvEd8m4fY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747079191; c=relaxed/simple; bh=kSZe5BRqz0dhczAp2bhd4QJpIEWetSdNut71QQAL5cA=; h=Date:Mime-Version:Message-ID:Subject:From:To:Content-Type; b=jjflJq7ZahNGU9/IlpYxv6ejhuvGSdDEwqe64iLvJHg/F4MCEXn2di7M0lezaWnUWCPLe/eQjoRntPGG7ju4VSaWrmS0evPbz6GKZ7Fax1DsMZ8RMF4N8uXx3FpKO/D/NgJUgM6AyMH2o8FK7PgZ5acCdfTa+GCKX4IyFivowEI= 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=Uqn8VZgG; arc=none smtp.client-ip=209.85.210.202 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="Uqn8VZgG" Received: by mail-pf1-f202.google.com with SMTP id d2e1a72fcca58-72f3b4c0305so5354382b3a.0 for ; Mon, 12 May 2025 12:46:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1747079189; x=1747683989; darn=vger.kernel.org; h=to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=KCS6TCz2k4JMDGyXshw5mX//JzYJvJIRNOVd3LwESJQ=; b=Uqn8VZgGmQKTVbioMwLrxxo91jT0JDRGYF8uomIapThqDR9s+Clkz6vULesP5GkTjX tf45uJANXEUnkvpay+kXhNBo2BaQn2+065rHVJOFhqUVYUYWITp3MnQC3V1RYj3v/NiK QpBYDT/89nb2v1elgEKnOo7wXOELzrm8FEUim7RoK3gwRmvUhKGLadRo4Idg5Tl140wR vnT4ieo0HUSnY8Er8ci5WWH6C43wuxeXDC7Kw2wSWDjsJ0PvJtsBkNLmhzYUoFiyg0re uz0OMMnU3uyUbV9bplMbrdkcyBPaITQGobaZWMYdnBceAZvV2E+5po4febkBidQOgkE8 Ag3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747079189; x=1747683989; h=to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=KCS6TCz2k4JMDGyXshw5mX//JzYJvJIRNOVd3LwESJQ=; b=RL53sML50MNR7xjMv4AUHX4pZ/EIZyPHygAq8/r0TZQR3v0I0iNgQ8McyiWU2usoeK N/oORUHzxUR8MDsQ9jFhXKa0DGBN30kjEt2SO7sJ5PqCOWKiB5Rbz0W7nq9KJE8LnRgq 4Vt7QFdc0swTF0CzzbxQzgilzwqdcTY9jEIUAXxGfrHbsa2PvtHbjVZ5rt33ZdCQd4HQ HjByio32PxS6KxyUqsBuWvuskyUZkxMiNgm4WKxmhA42Zx5V9zMzEAy0gGy/UxTsUJxE F8zcKA6JyTVyAqbCqINPYID1yVzczAG/lPMJbdQSdJlqbeUsxsMgSlaU+7bJ2W8OKtNy EaRg== X-Forwarded-Encrypted: i=1; AJvYcCXO0CrhpZF/1aCMGWxkkHfSYYr2zizLzE4QAIFoM0cbjEmFbQp85fBGenLIirNEC9qjdvCPH7sBIjkE/LA=@vger.kernel.org X-Gm-Message-State: AOJu0Yz6TtfPfX0zz76Y5xfG1ZTq7WD9z96V/ksVDSHBQw4NBi7wEWjb eJ0rnI8wrCow+dc/r1s6PyQpN6DOBkVQ1SZtlrBA4Y/Xr0BZdZLgWpZCwe//Pmw9wKf1LEk/DE9 /GT78aA== X-Google-Smtp-Source: AGHT+IEeTcRv9UOqhEhkvudchZcUoofJuCiliW2oNTTuFaFiCUkmau+51NAFjGXKNF1O3yPqn5kZoJtpPdAx X-Received: from pfht4.prod.google.com ([2002:a62:ea04:0:b0:740:4dd9:9ebf]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:2313:b0:73c:c11:b42e with SMTP id d2e1a72fcca58-7423c0176f2mr19391272b3a.20.1747079189274; Mon, 12 May 2025 12:46:29 -0700 (PDT) Date: Mon, 12 May 2025 12:46:19 -0700 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 2.49.0.1045.g170613ef41-goog Message-ID: <20250512194622.33258-1-irogers@google.com> Subject: [PATCH v2 0/3] Metric related performance improvements From: Ian Rogers To: Arnaldo Carvalho de Melo , Peter Zijlstra , Ingo Molnar , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , James Clark , Xu Yang , Thomas Richter , Ravi Bangoria , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" The "PMU JSON event tests" have been running slowly, these changes target improving them with an improvement of the test running 8 to 10 times faster. The first patch changes from searching through all aliases by name in a list to using a hashmap. Doing a fast hashmap__find means testing for having an event needn't load from disk if an event is already present. The second patch switch the fncache to use a hashmap rather than its own hashmap with a limited number of buckets. When there are many filename queries, such as with a test, there are many collisions with the previous fncache approach leading to linear searching of the entries. The final patch adds a find function for metrics. Normally metrics can match by name and group, however, only name matching happens when one metric refers to another. As we test every "id" in a metric to see if it is a metric, the find function can dominate performance as it linearly searches all metrics. Add a find function for the metrics table so that a metric can be found by name with a binary search. Before these changes: ``` $ time perf test -v 10 10: PMU JSON event tests : 10.1: PMU event table sanity : Ok 10.2: PMU event map aliases : Ok 10.3: Parsing of PMU event table metrics : Ok 10.4: Parsing of PMU event table metrics with fake PMUs : Ok 10.5: Parsing of metric thresholds with fake PMUs : Ok real 0m18.499s user 0m18.150s sys 0m3.273s ``` After these changes: ``` $ time perf test -v 10 10: PMU JSON event tests : 10.1: PMU event table sanity : Ok 10.2: PMU event map aliases : Ok 10.3: Parsing of PMU event table metrics : Ok 10.4: Parsing of PMU event table metrics with fake PMUs : Ok 10.5: Parsing of metric thresholds with fake PMUs : Ok real 0m2.338s user 0m1.797s sys 0m2.186s ``` v2: Rebase on tmp.perf-tools-next. Ian Rogers (3): perf fncache: Switch to using hashmap perf pmu: Change aliases from list to hashmap perf metricgroup: Binary search when resolving referred to metrics tools/perf/builtin-stat.c | 6 +- tools/perf/pmu-events/empty-pmu-events.c | 66 ++++++++- tools/perf/pmu-events/jevents.py | 66 ++++++++- tools/perf/pmu-events/pmu-events.h | 23 +++- tools/perf/tests/pmu-events.c | 129 +++++++++-------- tools/perf/util/fncache.c | 69 +++++----- tools/perf/util/fncache.h | 1 - tools/perf/util/hwmon_pmu.c | 43 +++--- tools/perf/util/metricgroup.c | 102 ++++++-------- tools/perf/util/metricgroup.h | 2 +- tools/perf/util/pmu.c | 167 +++++++++++++++-------- tools/perf/util/pmu.h | 4 +- tools/perf/util/srccode.c | 4 +- tools/perf/util/tool_pmu.c | 17 +-- 14 files changed, 430 insertions(+), 269 deletions(-) -- 2.49.0.1045.g170613ef41-goog