From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 854201C07 for ; Wed, 28 Dec 2022 16:28:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2343C433D2; Wed, 28 Dec 2022 16:28:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672244927; bh=uYcjfxC+EUWYd+tu5aC8lOXvRXpPqqNzU6mUpcQAXD8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ATQUYYT/w9t2ia7yvpLKUyOaeWK7v8UM51Q9lk+G7b+y6wtV2yZtXR3Q8YSFhSFxq uX/1aWJ9FdyDTpfTHBQjSTUJZPBfsi/uzAWgLmJM+creVvKs267iNqSvhmkUBH1A0o m0tg9mVPCpm+a4k/9n48kk2o8dOZc59WjvWnMZXk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, James Clark , Adrian Hunter , Alexander Shishkin , Ian Rogers , Ingo Molnar , Jiri Olsa , Mark Rutland , Namhyung Kim , Peter Zijlstra , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 6.1 0763/1146] perf tools: Fix "kernel lock contention analysis" test by not printing warnings in quiet mode Date: Wed, 28 Dec 2022 15:38:22 +0100 Message-Id: <20221228144350.871240876@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144330.180012208@linuxfoundation.org> References: <20221228144330.180012208@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: James Clark [ Upstream commit 65319890c32db29fb56b41f84265a2c7029943f4 ] Especially when CONFIG_LOCKDEP and other debug configs are enabled, Perf can print the following warning when running the "kernel lock contention analysis" test: Warning: Processed 1378918 events and lost 4 chunks! Check IO/CPU overload! Warning: Processed 4593325 samples and lost 70.00%! The test already supplies -q to run in quiet mode, so extend quiet mode to perf_stdio__warning() and also ui__warning() for consistency. This fixes the following failure due to the extra lines counted: perf test "lock cont" -vvv 82: kernel lock contention analysis test : --- start --- test child forked, pid 3125 Testing perf lock record and perf lock contention [Fail] Recorded result count is not 1: 9 test child finished with -1 ---- end ---- kernel lock contention analysis test: FAILED! Fixes: ec685de25b6718f8 ("perf test: Add kernel lock contention test") Signed-off-by: James Clark Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20221018094137.783081-2-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/ui/util.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/perf/ui/util.c b/tools/perf/ui/util.c index 689b27c34246..1d38ddf01b60 100644 --- a/tools/perf/ui/util.c +++ b/tools/perf/ui/util.c @@ -15,6 +15,9 @@ static int perf_stdio__error(const char *format, va_list args) static int perf_stdio__warning(const char *format, va_list args) { + if (quiet) + return 0; + fprintf(stderr, "Warning:\n"); vfprintf(stderr, format, args); return 0; @@ -45,6 +48,8 @@ int ui__warning(const char *format, ...) { int ret; va_list args; + if (quiet) + return 0; va_start(args, format); ret = perf_eops->warning(format, args); -- 2.35.1