netdev - Re: [PATCH 0/9 Rev3] Implement batching skb API and support in IPoIB

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Message-ID: <46CC6DD1.5020105@hp.com>
Date:	Wed, 22 Aug 2007 10:09:37 -0700
From:	Rick Jones <rick.jones2@...com>
To:	David Miller <davem@...emloft.net>
Cc:	krkumar2@...ibm.com, gaagaan@...il.com,
	general@...ts.openfabrics.org, hadi@...erus.ca,
	herbert@...dor.apana.org.au, jagana@...ibm.com, jeff@...zik.org,
	johnpol@....mipt.ru, kaber@...sh.net, kumarkr@...ux.ibm.com,
	mcarlson@...adcom.com, mchan@...adcom.com, netdev@...r.kernel.org,
	peter.p.waskiewicz.jr@...el.com, rdreier@...co.com,
	Robert.Olsson@...a.slu.se, shemminger@...ux-foundation.org,
	sri@...ibm.com, tgraf@...g.ch, xma@...ibm.com
Subject: Re: [PATCH 0/9 Rev3] Implement batching skb API and support in IPoIB

David Miller wrote:
> I think the jury is still out, but seeing TSO perform even slightly
> worse with the batching changes in place would be very worrysome.
> This applies to both throughput and cpu utilization.

Should it be any more or less worrysome than small packet performance (eg the 
TCP_RR stuff I posted recently) being rather worse with TSO enabled than with it 
disabled?

rick jones

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