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Message-ID: <20070720125423.GB13468@2ka.mipt.ru> Date: Fri, 20 Jul 2007 16:54:23 +0400 From: Evgeniy Polyakov <johnpol@....mipt.ru> To: Krishna Kumar <krkumar2@...ibm.com> Cc: davem@...emloft.net, rdreier@...co.com, Robert.Olsson@...a.slu.se, peter.p.waskiewicz.jr@...el.com, kumarkr@...ux.ibm.com, herbert@...dor.apana.org.au, gaagaan@...il.com, mcarlson@...adcom.com, xma@...ibm.com, rick.jones2@...com, hadi@...erus.ca, jeff@...zik.org, general@...ts.openfabrics.org, mchan@...adcom.com, tgraf@...g.ch, netdev@...r.kernel.org, jagana@...ibm.com, kaber@...sh.net, sri@...ibm.com Subject: Re: [PATCH 00/10] Implement batching skb API Hi Krishna. On Fri, Jul 20, 2007 at 12:01:49PM +0530, Krishna Kumar (krkumar2@...ibm.com) wrote: > After fine-tuning qdisc and other changes, I modified IPoIB to use this API, > and now get good gains. Summary for TCP & No Delay: 1 process improves for > all cases from 1.4% to 49.5%; 4 process has almost identical improvements > from -1.7% to 59.1%; 16 process case also improves in the range of -1.2% to > 33.4%; while 64 process doesn't have much improvement (-3.3% to 12.4%). UDP > was tested with 1 process netperf with small increase in BW but big > improvement in Service Demand. Netperf latency tests show small drop in > transaction rate (results in separate attachment). What about round-robin tcp time and latency test? In theory such batching mode should not change that timings, but practice can show new aspects. I will review code later this week (likely tomorrow) and if there will be some issues return back. -- Evgeniy Polyakov - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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