From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) (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 A516238B9B1; Mon, 19 Jan 2026 15:44:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=78.32.30.218 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768837452; cv=none; b=fXq5AikIDKlEfVxWYIXvng5XaeEwf3HDdF8YbQoUZU68w1tKGftL0dNzt3CVFoD2ZGZRWrtIOl6iE68OIVo4JrvG4ZEsCGqj5tPXnMjePmP6UICrpfDFrL5rP7n+RlYWKX+KfcqhEqL9/IGGg4Id4sdiX97danlZMvbEvh56/6U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768837452; c=relaxed/simple; bh=hoaRJky72TDMbUW4ehDh/qVmWU/lQsORlAtpr/L7ZUs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=l9eWGpte9NKDiwN5icBI4Z0rQnlIJqi/rHYIgA7V7oAYBN4Q2e5gDvpuJAGOWk95Utn9XV4QJSJ8kSRUFXKwalcd+cg5s4w1KWpk+FizAFYeIKBrXxhSf1J7raWWPZ2OK9Th1IO4pkOsLEMlgtTPLAlAgxVV3+83ak4+OE3QdIs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk; spf=none smtp.mailfrom=armlinux.org.uk; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b=HmJkkmpm; arc=none smtp.client-ip=78.32.30.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="HmJkkmpm" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=OdUaoSCio5puaeEe+IXYRT66N1Ls4wbMpbo4oPDQLsE=; b=HmJkkmpmk2E6djd/Aucm1PAm+P oa9Y9tr5QEVJ3waQyLIHcEzb+EoTSGXotpvVcxeoykh7MgPN4P3oDy11d8ER9qgj16YKgx5/teuK4 f/fkGuhS/ykGSKUEjo1Zh6pUAnyu7vFNDWt1zLK26HYqPYgv8YkyBwjKnprlYnMg1NN+FcQFVZ3Ok BDhZxZdHe4qzYAVSSNPe3/5BWtQM6sFmzVs4DpchChJSrFbGm3PoagncOyLGGxWTbCjducqEHZpEO 7IrTlf+BpD0a2Dp0gGfAfMKW+oTMCqA4GSO/Fjl7wZuLXxZfMiHc6zwr1K+wSbo9AVpHtqwBCmTrA 4crlQW0w==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:36966) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1vhrQ1-000000005N0-0Asu; Mon, 19 Jan 2026 15:43:53 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.98.2) (envelope-from ) id 1vhrPs-000000006gH-2ofS; Mon, 19 Jan 2026 15:43:44 +0000 Date: Mon, 19 Jan 2026 15:43:44 +0000 From: "Russell King (Oracle)" To: Georg Gottleuber Cc: Yao Zi , andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, Frank.Sae@motor-comm.com, hkallweit1@gmail.com, vladimir.oltean@nxp.com, wens@csie.org, jszhang@kernel.org, 0x1207@gmail.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, jeffbai@aosc.io, kexybiscuit@aosc.io Subject: Re: [PATCH RESEND net-next v6 0/3] Add DWMAC glue driver for Motorcomm YT6801 Message-ID: References: <20260109093445.46791-2-me@ziyao.cc> <176827502141.1659151.5259885987231026081.git-patchwork-notify@kernel.org> <147b700c-cae2-4286-b532-ec408e00b004@tuxedocomputers.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <147b700c-cae2-4286-b532-ec408e00b004@tuxedocomputers.com> Sender: Russell King (Oracle) On Mon, Jan 19, 2026 at 04:33:17PM +0100, Georg Gottleuber wrote: > Hi, > > I tested this driver with our TUXEDO InfinityBook Pro AMD Gen9. Iperf > revealed that tx is only 100Mbit/s: > > ## YT6801 TX > > [ ID] Interval Transfer Bitrate Retr Cwnd > [ 5] 0.00-1.00 sec 8.75 MBytes 73.3 Mbits/sec 0 164 KBytes > > [ 5] 1.00-2.00 sec 8.62 MBytes 72.4 Mbits/sec 0 164 KBytes > > [ 5] 2.00-3.00 sec 8.62 MBytes 72.4 Mbits/sec 0 164 KBytes > > [ 5] 3.00-4.00 sec 8.12 MBytes 68.2 Mbits/sec 0 164 KBytes > > [ 5] 4.00-5.00 sec 8.62 MBytes 72.3 Mbits/sec 0 164 KBytes > > [ 5] 5.00-6.00 sec 8.50 MBytes 71.3 Mbits/sec 0 164 KBytes > > [ 5] 6.00-7.00 sec 8.25 MBytes 69.2 Mbits/sec 0 164 KBytes > > [ 5] 7.00-8.00 sec 8.62 MBytes 72.4 Mbits/sec 0 164 KBytes > > [ 5] 8.00-9.00 sec 8.50 MBytes 71.3 Mbits/sec 0 164 KBytes > > [ 5] 9.00-10.00 sec 8.62 MBytes 72.3 Mbits/sec 0 164 KBytes > > - - - - - - - - - - - - - - - - - - - - - - - - - > [ ID] Interval Transfer Bitrate Retr > [ 5] 0.00-10.00 sec 85.2 MBytes 71.5 Mbits/sec 0 sender > [ 5] 0.00-10.05 sec 84.4 MBytes 70.5 Mbits/sec > receiver > > > ## YT6801 RX > > [ ID] Interval Transfer Bitrate > [ 5] 0.00-1.00 sec 112 MBytes 939 Mbits/sec > [ 5] 1.00-2.00 sec 112 MBytes 941 Mbits/sec > [ 5] 2.00-3.00 sec 112 MBytes 941 Mbits/sec > [ 5] 3.00-4.00 sec 112 MBytes 942 Mbits/sec > [ 5] 4.00-5.00 sec 112 MBytes 942 Mbits/sec > [ 5] 5.00-6.00 sec 112 MBytes 943 Mbits/sec > [ 5] 6.00-7.00 sec 112 MBytes 941 Mbits/sec > [ 5] 7.00-8.00 sec 112 MBytes 942 Mbits/sec > [ 5] 8.00-9.00 sec 112 MBytes 942 Mbits/sec > [ 5] 9.00-10.00 sec 112 MBytes 941 Mbits/sec > - - - - - - - - - - - - - - - - - - - - - - - - - > [ ID] Interval Transfer Bitrate Retr > [ 5] 0.00-10.04 sec 1.10 GBytes 941 Mbits/sec 88 sender > [ 5] 0.00-10.00 sec 1.10 GBytes 941 Mbits/sec > receiver > > With our normally used DKMS module, Ethernet works with full-duplex and > gigabit. Attached are some logs from lspci and dmesg. Do you have any > idea how I can debug this further? My suggestion would be: - Look at the statistics, e.g. ip -s li sh dev enp2s0 - apply https://lore.kernel.org/r/E1vgtBc-00000005D6v-040n@rmk-PC.armlinux.org.uk to enable more statistics to work, and check the network driver statistics: ethtool --statistics enp2s0 to see if there's any clues for what is going on. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!