netdev - Re: [PATCH net-next 3/3] net: lantiq_xrx200: convert to build

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Message-ID: <0db849a8-2708-6412-301d-fe77b2cf8d00@gmail.com>
Date:   Tue, 4 Jan 2022 09:42:08 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Aleksander Jan Bajkowski <olek2@...pl>, tsbogend@...ha.franken.de,
        hauke@...ke-m.de, davem@...emloft.net, kuba@...nel.org,
        netdev@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 3/3] net: lantiq_xrx200: convert to build_skb


On 1/4/22 07:11, Aleksander Jan Bajkowski wrote:
> We can increase the efficiency of rx path by using buffers to receive
> packets then build SKBs around them just before passing into the network
> stack. In contrast, preallocating SKBs too early reduces CPU cache
> efficiency.
>
> NAT Performance results on BT Home Hub 5A (kernel 5.10.89, mtu 1500):
>
> 	Down		Up
> Before	577 Mbps	648 Mbps
> After	624 Mbps	695 Mbps
>
> Signed-off-by: Aleksander Jan Bajkowski <olek2@...pl>
> ---


Not sure why GRO is not yet implemented in this driver...