linux-kernel - Re: [PATCH 2/2] arm64: dts: imx8mm: Add Gateworks IMX8MM Development Kits

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Message-ID: <CAGngYiXSyNXjxTHBVd13NfjexzZpOZb1dayWDWO7eV19xNr5wg@mail.gmail.com>
Date:   Thu, 24 Dec 2020 10:34:40 -0500
From:   Sven Van Asbroeck <thesven73@...il.com>
To:     Tim Harvey <tharvey@...eworks.com>,
        Anders Rønningen <anders@...ningen.priv.no>
Cc:     Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] arm64: dts: imx8mm: Add Gateworks IMX8MM Development Kits

Tim, Anders,

On Wed, Dec 23, 2020 at 5:45 PM Tim Harvey <tharvey@...eworks.com> wrote:
>
>  - 2x RJ45 GbE (IMX8MM FEC and LAN743x)

I noticed that you are users of the LAN743x PCIe ethernet chip.

On non-cache snooping architectures such as ARM, the receive performance of
this chip's driver is about 1/3 of what it should be. I am currently preparing a
patch set which boosts performance x3, but it's not trivial, so I am looking for
LAN743X users who could help test the patch set - especially on arm64 or x86,
architectures I have no access to.

Happy holidays,
Sven