netdev - Re: [PATCH net-next] udp: under rx pressure, try to condense skbs

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Message-ID: <1481139102.4930.65.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Wed, 07 Dec 2016 11:31:42 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     David Miller <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>, Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH net-next] udp: under rx pressure, try to condense skbs

On Wed, 2016-12-07 at 09:19 -0800, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>

> This patch gave me about 5 % increase in throughput in my tests.
> 

BTW, this reduces the gap with GRO being on or off for me :

mlx4 drivers has a copybreak feature when GRO is off :

Packets below 256 bytes are simply copied into a linear skb
 ( done in mlx4_en_rx_skb() )