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 3452613E02D; Thu, 19 Sep 2024 22:03:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726783399; cv=none; b=rex7ZoP6Bo0/0ZQznBoTF6bqCKxdIV0TtKnTMbLQCHAsc/LdMPQmAj7dIuy5rhd73OxAZSHpQH8fa9keHLx4v2sz48pp/b4GWFFY8XgOsaEg0Rk1clJo1jHoXyUar0PuDBziR88RZwtdlvgxS70YtpYTcBt4wUFSl47qOxuqF6s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726783399; c=relaxed/simple; bh=NcHJpWK6PfFOtnxwxDObNWEzgpthG8MvH6wdAEyPSlw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=kqumJqYrfHBtXjZTiPBaTLWywoe2Cis3mmNXLQQXeQba6sNX9tHg6Te+3qDbIeg+/lH8+xEQ952U+nlgwHw6CWf926ppmjczJxX0QYMe8jce/j1PSGPt5Tf1H+OxGoLMmdgue/s3O0QAuRPXTTK0ILGeOqFyO0ZpxjKeFYQYS6I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=onNiyFI5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="onNiyFI5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0EEDFC4CEC4; Thu, 19 Sep 2024 22:03:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1726783397; bh=NcHJpWK6PfFOtnxwxDObNWEzgpthG8MvH6wdAEyPSlw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=onNiyFI55+w6hFiNHs7R/3IX5YyVq7L9ZvQpcfTZcF83VhIf/eO/jG3ME96w47ooc /0JqDn4v9B7a66G4AGMvVj/7UcPh0z+vlF94LP6blfd44RDc43jMiKWRDzy94JgzZS MrVKpDgZcUuw/C++GYLU+DGl1l/sCeF+i6ioc07P0dl3lTmZu+NgQM5UqFdMCSTTZX oZtRxOnW/3OedZcPw+O3l/1iujRRBYtviPR7K2XCm728jHfj70bL8CBmZz7O8zDuGb J3SWQGhSDVEDTl3P3fGieP/gq3TpXicrupzri5rbTEc4W6M3eU9zvcXhNpFzyGPhD9 tNE+t3zAALENA== Message-ID: <0849977a-e772-4778-9130-c8ac0539bbdc@kernel.org> Date: Fri, 20 Sep 2024 00:03:11 +0200 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Beta Subject: Re: [PATCH net] selftests/net: packetdrill: increase timing tolerance in debug mode Content-Language: en-GB To: Willem de Bruijn , netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, edumazet@google.com, pabeni@redhat.com, sdf@fomichev.me, linux-kselftest@vger.kernel.org, Willem de Bruijn References: <20240919124412.3014326-1-willemdebruijn.kernel@gmail.com> From: Matthieu Baerts Autocrypt: addr=matttbe@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Willem, On 19/09/2024 14:43, Willem de Bruijn wrote: > From: Willem de Bruijn > > Some packetdrill tests are flaky in debug mode. As discussed, increase > tolerance. Thank you for the patch! > We have been doing this for debug builds outside ksft too. > > Previous setting was 10000. A manual 50 runs in virtme-ng showed two > failures that needed 12000. To be on the safe side, Increase to 14000. So far (in 3 runs), it looks like 14000 is enough. But I guess it is still a bit too early to conclude that. https://netdev.bots.linux.dev/contest.html?executor=vmksft-packetdrill-dbg (Your patch has been introduced in the net-next-2024-09-19--15-00 branch.) Personally, I would not be chocked if the tolerance was even 10x higher to cope with this very slow environment where we care less about timing I think. But if less works, that's good: Acked-by: Matthieu Baerts (NGI0) Just one question for later: in the GitHub repo, some tests set the tolerance in the .pkt file, will it be OK for these tests? I guess yes, because the max they set is 10k, but I just want to double-check. (Note that it is now easier to spot other errors :) e.g.) https://netdev-3.bots.linux.dev/vmksft-packetdrill-dbg/results/779660/22-tcp-zerocopy-epoll-exclusive-pkt/stdout Cheers, Matt -- Sponsored by the NGI0 Core fund.