From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f74.google.com (mail-oa1-f74.google.com [209.85.160.74]) (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 8D12E1DF96E for ; Tue, 26 Nov 2024 21:23:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732656183; cv=none; b=OPyjejyKBdRnZV/mvW//OmxORgkr1FDu54JQh6GupSJjKT+S/1ZX4d/UvylhoWoeIcAH1VxQ4S9pIOkD0N9WdLXLCKh5LINt/jRtlnV2fDTaiPxC3UYqrx03AEPbbnSBa5mFm84AX6sxhij7PnUzVAIZcAIkJNGKFhkBtoTrVag= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732656183; c=relaxed/simple; bh=uWfG3aFd9L7KcN8o/2ryZod93n0xGj+0UAobnfXWQok=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=tPEPRwUJmH/8fJx+el0xX+sdXr2TSoOSAQm6QCVyMLvNEArVz8BgDLz03v241PtNe/ovX4Rbf1Z5AuIzJ3Gbn8PV+H5ji3mkWLpMZV7vqkvwKsajXY4OJMMg8SlR90Cc/p02uodOQliRmPgzVbMAtqsMdWGUzgzRQz+eanmjvf4= 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=TTSmoWcC; arc=none smtp.client-ip=209.85.160.74 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="TTSmoWcC" Received: by mail-oa1-f74.google.com with SMTP id 586e51a60fabf-2973ff5c7e5so3336115fac.0 for ; Tue, 26 Nov 2024 13:23:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1732656181; x=1733260981; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=4CyA4dAp81BoyY8Q+pL46oKmUutuArwSzQiAf9JnH7U=; b=TTSmoWcCpLJaU+jj4Z6YJYrWBRg67SNpJrhAjk1CpJ5DKrAM844e1WcvZCou4AhiQ3 zWstzE+3O8+1hU7RBtpwaXfwQleWgp7M4X4Ti0h33ioYEbpUzd6x8BSb3Q/dpT5R3C/s 8tabRzRNP4OvpksiBvxy87fEOWyf22FYLZkrfCJRlq7HzQbK6C7ZDtpEsOOGeOxaudAL F15Y9YNRv63DnEckvptiXNeBsqQXoLAg4Lh93bR2QgoC3fAfd0LUT7g18ehWTU4D3KYx vqZELjFXnVFx4bq/7Py0uBP69OkkowMASCm2/Xmf9DkFLZOkgtM+WkJcBsx6F4k6cZI9 5tNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732656181; x=1733260981; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=4CyA4dAp81BoyY8Q+pL46oKmUutuArwSzQiAf9JnH7U=; b=aveVC/isu/xUfAStwZzzQ7aXTqGmusUxPGmaK32ycSCp0Kq9ey+1BUqVXLPJ5r9mvg 2GgUFiDVnSgWM8IHQxTUXZ89KVGlH5G5jjRPCjyKLueMtVmTbxaGbm84lAReMtHq1JtR 5+0pBxHf1Mq7E7e0ZbyZ6sCZKXc2gRhmvvyRlaw23DK/TsJt3huTszYMgVijqfW5dzKj fQWl+Yo2IzBVFw58sWQautm2EOqoN/+DvD3eWrKOG5K4J6fFJp4hxjAhCFVh/qq1vf3T /vVRTydETDbUnQb66wotPAO3QrwBN0fX1OkSZK8HMtrsHG6qbiSiWIPF1Pa+70RV6O/k hVHw== X-Gm-Message-State: AOJu0YzzLjn6UgKw8l9ntCFLxCQrqygt7J6IAzCiy3nMy4zjUuBXfh++ RnB6HaixHs+9gzRtNMJFV9UFQIcFJZzONT23FZq+aOm2Mh7K+ubwn5T6XyUXsqnzVNk3JnZpL7t Y9OJTUATG7pRAsbCPSyCkbXFfBJZPUIQpK/6jPbhE/W5m9Fwzp0Sl/SsU/KZxyIy4D4Stku4Us7 1jtIZgD+DK+FKaETtDiDWZqhg12TmTsK9BAEPTLDGA X-Google-Smtp-Source: AGHT+IEpSyqe3GdnLFU3135TtDqH0ZaMLDEV7pZ3XE/nL53nO8kfwk/awIzeHTAYxt60d4LnAGsOHkC+5n4= X-Received: from oabwd3.prod.google.com ([2002:a05:6871:a583:b0:296:7f65:cd4f]) (user=ctshao job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6870:658b:b0:25e:d90:fe70 with SMTP id 586e51a60fabf-29dc44d0c38mr391293fac.43.1732656180729; Tue, 26 Nov 2024 13:23:00 -0800 (PST) Date: Tue, 26 Nov 2024 13:22:54 -0800 In-Reply-To: <20241126212255.3793822-1-ctshao@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241126212255.3793822-1-ctshao@google.com> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog Message-ID: <20241126212255.3793822-2-ctshao@google.com> Subject: [PATCH v3 2/2] 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, 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: 8.425 [sec] 8.425402 usecs/op 118688 ops/sec contended total wait max wait avg wait type caller 194 1.68 ms 44.16 us 8.66 us mutex pipe_read+0x57 10 423.03 us 44.27 us 42.30 us rwlock:W do_exit+0x365 54 254.67 us 58.87 us 4.72 us mutex pipe_write+0x50 21 146.64 us 11.54 us 6.98 us mutex pipe_read+0x282 10 141.27 us 20.62 us 14.13 us rwlock:W release_task+0x6f 5 58.92 us 16.37 us 11.78 us mutex do_epoll_wait+0x24d 3 29.81 us 17.66 us 9.94 us mutex do_epoll_ctl+0x6c1 4 26.82 us 11.02 us 6.70 us mutex do_epoll_wait+0x24d 2 18.32 us 12.49 us 9.16 us rwlock:W do_epoll_wait+0x255 1 11.34 us 11.34 us 11.34 us rwlock:W ep_done_scan+0x2d 1 11.02 us 11.02 us 11.02 us rwlock:R mm_update_next_owner+0x4e 1 10.60 us 10.60 us 10.60 us rwlock:W do_epoll_ctl+0xb65 1 9.90 us 9.90 us 9.90 us rwlock:W do_exit+0x365 Fixes: d783ea8f62c4 ("perf lock contention: Simplify parse_lock_type()") Signed-off-by: Chun-Tse Shao --- tools/perf/builtin-lock.c | 68 ++++++++++++++++++++++++++------------- 1 file changed, 45 insertions(+), 23 deletions(-) diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c index c528aff1c9d5..c1870c287580 100644 --- a/tools/perf/builtin-lock.c +++ b/tools/perf/builtin-lock.c @@ -1622,19 +1622,6 @@ static const char *get_type_lock_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].flags_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].lock_name, str)) - return lock_type_table[i].flags; - } - return UINT_MAX; -} - static void lock_filter_finish(void) { zfree(&filters.types); @@ -2356,29 +2343,64 @@ 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 a flags name if it contains ':'. */ + if (strchr(tok, ':')) { + for (unsigned int i = 0; i < ARRAY_SIZE(lock_type_table); i++) { + if (!strcmp(lock_type_table[i].flags_name, 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 a lock name. + * Single lock name could contain multiple flags. + */ + /* + * By documentation, `percpu-rwmem` should be `pcpu-sem`. + * For backward compatibility, we replace `pcpu-sem` with `percpu-rwmem`. + */ + if (!strcmp(tok, "pcpu-sem")) + tok = (char *)"percpu-rwsem"; + + for (unsigned int i = 0; i < ARRAY_SIZE(lock_type_table); i++) { + if (!strcmp(lock_type_table[i].lock_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) -- 2.47.0.338.g60cca15819-goog