netdev - Re: [PATCH net-next 0/2] pskb_extract() helper function.

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Message-ID: <20160422234149.GD30220@oracle.com>
Date:	Fri, 22 Apr 2016 19:41:49 -0400
From:	Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:	marcelo.leitner@...il.com
Cc:	netdev@...r.kernel.org, rds-devel@....oracle.com,
	santosh.shilimkar@...cle.com, davem@...emloft.net,
	eric.dumazet@...il.com
Subject: Re: [PATCH net-next 0/2] pskb_extract() helper function.

On (04/22/16 20:23), marcelo.leitner@...il.com wrote:
> My tests results were very similar to what I had without it. Varying to
> better or worse, tending worse.  Thing is, SCTP always works on
> linearized skbs as it can't crawl on fragments, so those clone/trim

sorry to hear that. For RDS-TCP, the rx side does show a noticeable
benefit with rds-stress. To an extent, this is also impacted
by the packet size, and the type of test (for our DB workloads,
we use request-response tests, and the packet size tends to
typically be 8K req, 256 byt responses), so I guess ymmv. 

--Sowmini