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 687867DA68; Tue, 26 Nov 2024 11:10:16 +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=1732619416; cv=none; b=SYurdyqK/Vxsa0p6tePEQg1yuEvwiwEDHgRTa7G1r0FGOeAx84YhkpE6k92+A/kEB1uLNwhaYDrR8u0VHhehmOU0lQXjRo7pGrsg5hu+aO368gC81tkJaqJIxRqSg3+MNzbD/2uOlN0kK7zA+0krZPTuVP/oRN/5lgz/Y45rsyA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732619416; c=relaxed/simple; bh=YSELgeIz82RADEql14/t1EXb+6i2e+P7ABdlJAwN9VE=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=JvqmJEirhpNr+it1bK3OzGqq2h96nbm69hMuAjBx66z4gl5H3naxJCp+6niwIzydH8FwfDu60j/0bUeVYC9ExQSod2SuZT3R/G1U9ByRvIJ98hMA2GFnHVud8V2MQmjoXyV90IrzVuCQMPjUe2ZbOa8ysF9jEGsocJ2Af+R1hHs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rQmhsDtG; 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="rQmhsDtG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EF89EC4CECF; Tue, 26 Nov 2024 11:10:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1732619416; bh=YSELgeIz82RADEql14/t1EXb+6i2e+P7ABdlJAwN9VE=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=rQmhsDtGHgZCzvVzZBt7fn2ztuz20Lk+A/h46VRqrCaegCebr1Zbxo2NZ+Ob0zdOA UWzJpoSSu2iBALpetVFov1tDH/mgIgUgbGniciwikmzY+tueNM/DKk5WSAVk+1ACFU +tivys9qA0izpv1MFc2g/RydJfJIBBqmEiXPfLSuTFOwx75/QdQ61Qwtm/hLd1FG05 tlaekR+3TJhzBcjRxfog2LP9GafXY1R68O+XECtmeLO/5DBPxFrf3FrXuiR6h3c49B 2jUtq4QF/6SGbPAxM7hhHuEbEr8gWRfsaHL/V8zDY2EInxH6UxD1FqfWHNUI9xGfEi WXegTKljtYkAQ== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id EB00A3809A00; Tue, 26 Nov 2024 11:10:29 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net] net: stmmac: dwmac-socfpga: Set RX watchdog interrupt as broken From: patchwork-bot+netdevbpf@kernel.org Message-Id: <173261942880.352444.541353075631044825.git-patchwork-notify@kernel.org> Date: Tue, 26 Nov 2024 11:10:28 +0000 References: <20241122141256.764578-1-maxime.chevallier@bootlin.com> In-Reply-To: <20241122141256.764578-1-maxime.chevallier@bootlin.com> To: Maxime Chevallier Cc: alexandre.torgue@foss.st.com, joabreu@synopsys.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, mcoquelin.stm32@gmail.com, alexis.lothore@bootlin.com, thomas.petazzoni@bootlin.com, netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Hello: This patch was applied to netdev/net.git (main) by Paolo Abeni : On Fri, 22 Nov 2024 15:12:55 +0100 you wrote: > On DWMAC3 and later, there's a RX Watchdog interrupt that's used for > interrupt coalescing. It's known to be buggy on some platforms, and > dwmac-socfpga appears to be one of them. Changing the interrupt > coalescing from ethtool doesn't appear to have any effect here. > > Without disabling RIWT (Received Interrupt Watchdog Timer, I > believe...), we observe latencies while receiving traffic that amount to > around ~0.4ms. This was discovered with NTP but can be easily reproduced > with a simple ping. Without this patch : > > [...] Here is the summary with links: - [net] net: stmmac: dwmac-socfpga: Set RX watchdog interrupt as broken https://git.kernel.org/netdev/net/c/407618d66dba You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html