From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f73.google.com (mail-oo1-f73.google.com [209.85.161.73]) (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 B663A153BF6 for ; Tue, 10 Dec 2024 20:09:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733861342; cv=none; b=JTkTNJ+ZTPma/IiybDIzJj8adyFzwUl6bQu9TSELW7K3o9ciF+ucWd4CCXH9BDYhxlomXAFaYjC2kKugbHOSeh9EIITWhLaXw2X4fjMwlTEzGi3iV7mXkStF6v5Y+RtS/qTq4ksaHt+s/bSFFq5yrdGZO1OFJhazXsa57eKCuHM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733861342; c=relaxed/simple; bh=twvGOqulnTZXTTOc/6wVLy2ytKDqD5qh/d0+OigPSPw=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=PUc3Ophy/SXEJTkYBL8yKfgOtQSxBxIazpMJRvOHMWdAne98Yqc7dmSNJMLSCgByQsLBGvbJCUDr2808ZHAtidhP72vAjpfg9H6wcSH8BB+GiJfZw/atW+ujyG0rj+T4+uG042Ve5v2orhRwn8AtyAUNdbDsxV2Tow0XU7SBHYQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--ctshao.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=FbmL74Ns; arc=none smtp.client-ip=209.85.161.73 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--ctshao.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="FbmL74Ns" Received: by mail-oo1-f73.google.com with SMTP id 006d021491bc7-5f2d927fe56so218410eaf.2 for ; Tue, 10 Dec 2024 12:09:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1733861340; x=1734466140; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=EhOjN52ZY8AkC8vGjiEI2+Z+fDENHCEMRgbgi5dltm0=; b=FbmL74NsZzFTpOmmIpyOAwJqdWxGct07GKKHwJaASS2MV9s9WMOnfXxxDnsC2lIrQz /llHlIIp5AtpmVwR/9LutdXz8M0Ik1kvga5d92VhbrfufSRA6sS8Qq+kqLfVEuhxaFEf STk5SaH9CpK3X/9y8t70PIJj3hgETROm98kRfAiDEb8rDCaZtxWkCN4U26wWoyVZObTR oRL4UXbdkuka8KNpeYtIi03jCRdMaOl1FXR0mNJ6zykO9ot1IufXzSh0ZmJNpiVCy/w0 k6ECKvfbxNZQf9u0S9QHheRjwJSXKTx5GFc4iIM7bZ3WS4fCN98fIsAxeVJGAUlaNhF9 EyQg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733861340; x=1734466140; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=EhOjN52ZY8AkC8vGjiEI2+Z+fDENHCEMRgbgi5dltm0=; b=lxdg2vUq4Y8BH9I6+JY7b1TX21WhMGT9rLPAqzHdXvBHR2oo47PTQQfGN59dUXBDEm dtEzJKofSWOgRvL9BOsX5ikBonRgCUimUYuCopfW0sDMyi2hJbktnf9uU+KTz2i9BZ4B gQTSUWV35kqaHyH8P9pqkUTlml65qZp18u+ad4LDSLmB5RSKEzEg4luvYQUJx2bF5V30 N/FGs4D17MbPiEY2MoOMQkcjOEyLhxkhXO8NlKS6H6CHe9GBQrZ1xNvkJpp1ss4XXN1D Y01wcwt1r+KnfV8cvDIU2eRLYDih7p/qsiH1cGIpZaGBtMhE8Jg56gcM9wKze3+1Mua+ tt4Q== X-Gm-Message-State: AOJu0Yx8nSgRndqpTyaalgnuTdvaOQ+k8tzZiP3mgPJJjrm359o4DN1m 4XnMFP8Uy6xiyx4ixU/UEW5QCi+KiyoOqUdOngItKFNsD3or2r9MP3Z8YcTNB5b3i6OqsWYE2ex z7lviATRltbNE4UUmlN71RfkdGjYHFULsTIET0K2TIxKjzwAL6SdzaWCrt76Lr0o8McwG0G5grt PyfNdI/Ndo5VEh1SsYGTOK1afi5UwXZlrOyIPcGC8Q X-Google-Smtp-Source: AGHT+IEzcGfBRAjDKfJ7YuO9iodMgvfYUhXkpH/odofCwurA8CzyEDmjQZfxj0xf6jTICeNt+QiwYr8iwTA= X-Received: from oabqt5.prod.google.com ([2002:a05:6870:6e05:b0:296:e8a8:44e]) (user=ctshao job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6870:64aa:b0:2a0:d2d:e60a with SMTP id 586e51a60fabf-2a012e62e82mr210744fac.43.1733861339689; Tue, 10 Dec 2024 12:08:59 -0800 (PST) Date: Tue, 10 Dec 2024 12:08:20 -0800 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 2.47.1.545.g3c1d2e2a6a-goog Message-ID: <20241210200847.1023139-1-ctshao@google.com> Subject: [PATCH v5 1/3] perf lock: Fix parse_lock_type which only retrieve one lock flag From: Chun-Tse Shao To: linux-kernel@vger.kernel.org Cc: Chun-Tse Shao , peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, kan.liang@linux.intel.com, nick.forrington@arm.com, linux-perf-users@vger.kernel.org Content-Type: text/plain; charset="UTF-8" `parse_lock_type` can only add the first lock flag in `lock_type_table` given input `str`. For example, for `Y rwlock`, it only adds `rwlock:R` into this perf session. Another example is for `-Y mutex`, it only adds the mutex without `LCB_F_SPIN` flag. The patch fixes this issue, makes sure both `rwlock:R` and `rwlock:W` will be added with `-Y rwlock`, and so on. Testing: $ ./perf lock con -ab -Y mutex,rwlock -- perf bench sched pipe # Running 'sched/pipe' benchmark: # Executed 1000000 pipe operations between two processes Total time: 9.313 [sec] 9.313976 usecs/op 107365 ops/sec contended total wait max wait avg wait type caller 176 1.65 ms 19.43 us 9.38 us mutex pipe_read+0x57 34 180.14 us 10.93 us 5.30 us mutex pipe_write+0x50 7 77.48 us 16.09 us 11.07 us mutex do_epoll_wait+0x24d 7 74.70 us 13.50 us 10.67 us mutex do_epoll_wait+0x24d 3 35.97 us 14.44 us 11.99 us rwlock:W ep_done_scan+0x2d 3 35.00 us 12.23 us 11.66 us rwlock:W do_epoll_wait+0x255 2 15.88 us 11.96 us 7.94 us rwlock:W do_epoll_wait+0x47c 1 15.23 us 15.23 us 15.23 us rwlock:W do_epoll_wait+0x4d0 1 14.26 us 14.26 us 14.26 us rwlock:W ep_done_scan+0x2d 2 14.00 us 7.99 us 7.00 us mutex pipe_read+0x282 1 12.29 us 12.29 us 12.29 us rwlock:R ep_poll_callback+0x35 1 12.02 us 12.02 us 12.02 us rwlock:W do_epoll_ctl+0xb65 1 10.25 us 10.25 us 10.25 us rwlock:R ep_poll_callback+0x35 1 7.86 us 7.86 us 7.86 us mutex do_epoll_ctl+0x6c1 1 5.04 us 5.04 us 5.04 us mutex do_epoll_ctl+0x3d4 Fixes: d783ea8f62c4 ("perf lock contention: Simplify parse_lock_type()") Signed-off-by: Chun-Tse Shao --- tools/perf/builtin-lock.c | 64 ++++++++++++++++++++++++--------------- 1 file changed, 39 insertions(+), 25 deletions(-) diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c index 062e2b56a2ab..7e36bbe3cb80 100644 --- a/tools/perf/builtin-lock.c +++ b/tools/perf/builtin-lock.c @@ -1591,8 +1591,6 @@ static const struct { { LCB_F_PERCPU | LCB_F_WRITE, "pcpu-sem:W", "percpu-rwsem" }, { LCB_F_MUTEX, "mutex", "mutex" }, { LCB_F_MUTEX | LCB_F_SPIN, "mutex", "mutex" }, - /* alias for get_type_flag() */ - { LCB_F_MUTEX | LCB_F_SPIN, "mutex-spin", "mutex" }, }; static const char *get_type_str(unsigned int flags) @@ -1617,19 +1615,6 @@ static const char *get_type_name(unsigned int flags) return "unknown"; } -static unsigned int get_type_flag(const char *str) -{ - for (unsigned int i = 0; i < ARRAY_SIZE(lock_type_table); i++) { - if (!strcmp(lock_type_table[i].name, str)) - return lock_type_table[i].flags; - } - for (unsigned int i = 0; i < ARRAY_SIZE(lock_type_table); i++) { - if (!strcmp(lock_type_table[i].str, str)) - return lock_type_table[i].flags; - } - return UINT_MAX; -} - static void lock_filter_finish(void) { zfree(&filters.types); @@ -2350,29 +2335,58 @@ static int parse_lock_type(const struct option *opt __maybe_unused, const char * int unset __maybe_unused) { char *s, *tmp, *tok; - int ret = 0; s = strdup(str); if (s == NULL) return -1; for (tok = strtok_r(s, ", ", &tmp); tok; tok = strtok_r(NULL, ", ", &tmp)) { - unsigned int flags = get_type_flag(tok); + bool found = false; - if (flags == -1U) { - pr_err("Unknown lock flags: %s\n", tok); - ret = -1; - break; + /* `tok` is `str` in `lock_type_table` if it contains ':'. */ + if (strchr(tok, ':')) { + for (unsigned int i = 0; i < ARRAY_SIZE(lock_type_table); i++) { + if (!strcmp(lock_type_table[i].str, tok) && + add_lock_type(lock_type_table[i].flags)) { + found = true; + break; + } + } + + if (!found) { + pr_err("Unknown lock flags name: %s\n", tok); + free(s); + return -1; + } + + continue; } - if (!add_lock_type(flags)) { - ret = -1; - break; + /* + * Otherwise `tok` is `name` in `lock_type_table`. + * Single lock name could contain multiple flags. + */ + for (unsigned int i = 0; i < ARRAY_SIZE(lock_type_table); i++) { + if (!strcmp(lock_type_table[i].name, tok)) { + if (add_lock_type(lock_type_table[i].flags)) { + found = true; + } else { + free(s); + return -1; + } + } } + + if (!found) { + pr_err("Unknown lock name: %s\n", tok); + free(s); + return -1; + } + } free(s); - return ret; + return 0; } static bool add_lock_addr(unsigned long addr) -- 2.47.1.545.g3c1d2e2a6a-goog