netdev - Re: [PATCH 1/2] stmmac: introduce flag to dynamically disable TX offload for rockchip devices

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Date:   Fri, 5 Apr 2019 19:29:03 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     "Leonidas P. Papadakos" <papadakospan@...il.com>,
        Jose Abreu <jose.abreu@...opsys.com>
Cc:     Philipp Tomsich <philipp.tomsich@...obroma-systems.com>,
        Heiko Stübner <heiko@...ech.de>,
        Christoph Müllner 
        <christoph.muellner@...obroma-systems.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        netdev@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Klaus Goger <klaus.goger@...obroma-systems.com>
Subject: Re: [PATCH 1/2] stmmac: introduce flag to dynamically disable TX
 offload for rockchip devices

On 05/04/2019 19:14, Leonidas P. Papadakos wrote:
> 
> Seems like snps,txpbl = <0x20> gives me better performance

What's your overall setup? So far with my RK3328 box I've found that 
with an IPv4 link and an MTU of 2000 I have to dial PBL right down to 1 
or 2 (with no-pbl-x8 as well) to prevent Tx stalling, and with the MTU 
bumped up to 3000 it just won't play at any PBL setting...

Robin.