From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Georg Gottleuber <ggo@tuxedocomputers.com>
Cc: Yao Zi <me@ziyao.cc>,
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
Date: Mon, 19 Jan 2026 15:43:44 +0000 [thread overview]
Message-ID: <aW5RMKqwpYTZ9uFH@shell.armlinux.org.uk> (raw)
In-Reply-To: <147b700c-cae2-4286-b532-ec408e00b004@tuxedocomputers.com>
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!
next prev parent reply other threads:[~2026-01-19 15:44 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-09 9:34 [PATCH RESEND net-next v6 0/3] Add DWMAC glue driver for Motorcomm YT6801 Yao Zi
2026-01-09 9:34 ` [PATCH RESEND net-next v6 1/3] net: phy: motorcomm: Support YT8531S PHY in YT6801 Ethernet controller Yao Zi
2026-01-09 10:06 ` Russell King (Oracle)
2026-01-09 9:34 ` [PATCH RESEND net-next v6 2/3] net: stmmac: Add glue driver for Motorcomm YT6801 ethernet controller Yao Zi
2026-01-12 6:10 ` Sai Krishna Gajula
2026-01-12 7:51 ` Yao Zi
2026-01-12 10:17 ` Russell King (Oracle)
2026-01-09 9:34 ` [PATCH RESEND net-next v6 3/3] MAINTAINERS: Assign myself as maintainer of Motorcomm DWMAC glue driver Yao Zi
2026-01-13 3:30 ` [PATCH RESEND net-next v6 0/3] Add DWMAC glue driver for Motorcomm YT6801 patchwork-bot+netdevbpf
2026-01-19 15:33 ` Georg Gottleuber
2026-01-19 15:43 ` Russell King (Oracle) [this message]
2026-01-19 17:45 ` Georg Gottleuber
2026-01-19 17:57 ` Georg Gottleuber
2026-01-20 2:45 ` Yao Zi
2026-01-20 9:42 ` Georg Gottleuber
2026-01-20 11:52 ` Yao Zi
2026-01-21 7:10 ` Xi Ruoyao
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