From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from vps0.lunn.ch (vps0.lunn.ch [156.67.10.101]) (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 DCCE44EB51; Thu, 24 Apr 2025 13:32:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=156.67.10.101 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745501570; cv=none; b=uxh5NVW3qVAz7yEWs9m9tA2IEEIrIcmKu0Ljkta4feIF/iCAEbf0Mkl4zgQDsr0qrfYPyxsXXNn2yRSB6j7UzUI2Z2bOSW3MDtqzXKmaSb/7jRz16WDaNYAnXxToAANpKVOEIU+3KMUasN0sCZNtXq92UdSElFteiltEFHQorbE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745501570; c=relaxed/simple; bh=KQNMIAfXh49xCtRQBxsBAwyCnS6gS+XOH1q2PhlhLyc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=floWsJFrYmOZSgJra0Gys/hV2/J6dB+C4O6Is1uthhhuBT9ifVyDROf5uYC1BvavACZnBJh+xwXV69WMp0XdmcNLqhsRaG4L3R+Zr2Ro8q5PEuXSR80+70eorQKZKi44eFbO0DiUn58AfABzmpNVtZfdS5rkqqh3qkOgBcCf2BQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lunn.ch; spf=pass smtp.mailfrom=lunn.ch; dkim=pass (1024-bit key) header.d=lunn.ch header.i=@lunn.ch header.b=E94egB8C; arc=none smtp.client-ip=156.67.10.101 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lunn.ch Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lunn.ch Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=lunn.ch header.i=@lunn.ch header.b="E94egB8C" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To:Content-Transfer-Encoding:Content-Disposition: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:From: Sender:Reply-To:Subject:Date:Message-ID:To:Cc:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Content-Disposition: In-Reply-To:References; bh=gmFv+tXEHYX7Ma3ew81kmxN4G8P+6CzJSOvVgnKOh54=; b=E9 4egB8CqtTOjDUEqJRsWVzhfzq39pm38uoijSaR8zqYVzxqKVf3UdUGAnvKpxqy+exD/orSQbqAic4 XHev/HvOzLuJ5auj96yizY8WaPxhBqlSuh1DqYZ1nMQQFZt5C+GyPZv+hNRU8aoHnHuwMf5liMiNK tyhhMeyNlLvJy6c=; Received: from andrew by vps0.lunn.ch with local (Exim 4.94.2) (envelope-from ) id 1u7wgW-00AT1W-9j; Thu, 24 Apr 2025 15:32:12 +0200 Date: Thu, 24 Apr 2025 15:32:12 +0200 From: Andrew Lunn To: Andre Przywara Cc: Yixun Lan , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Maxime Ripard , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH 4/5] arm64: dts: allwinner: a527: add EMAC0 to Radxa A5E board Message-ID: References: <20250423-01-sun55i-emac0-v1-0-46ee4c855e0a@gentoo.org> <20250423-01-sun55i-emac0-v1-4-46ee4c855e0a@gentoo.org> <20250424014120.0d66bd85@minigeek.lan> <20250424100514-GYA48784@gentoo> <6e9c003e-2a38-43a7-8474-286bdb6306a0@lunn.ch> <20250424142006.021d6ab4@donnerap.manchester.arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20250424142006.021d6ab4@donnerap.manchester.arm.com> > Speaking of which: do you know of a good method to verify the delay > timing? Is there *something* which is sensitive to those timings and which > can be easily checked and qualified? Not really. If you are on the edge, you might get more ethernet FCS errors. For iperf3 in UDP mode, that would translate to packet loss. Or ethtool -S might report checksum errors, depending on the driver. >From what i've heard from others there is a pretty sharp cut off from broken to working. Just stay away from the cliff and it should be O.K. for −40°C to 85°C, or whatever the temperate range is supposed to be. Andrew