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Date: Fri, 22 Jun 2007 13:59:36 +0400 From: Evgeniy Polyakov <johnpol@....mipt.ru> To: Rick Jones <rick.jones2@...com> Cc: jamal <hadi@...erus.ca>, Krishna Kumar2 <krkumar2@...ibm.com>, Gagan Arneja <gaagaan@...il.com>, netdev@...r.kernel.org, Sridhar Samudrala <sri@...ibm.com>, David Miller <davem@...emloft.net>, Robert Olsson <Robert.Olsson@...a.slu.se> Subject: Re: [WIP][PATCHES] Network xmit batching On Thu, Jun 21, 2007 at 02:00:07PM -0700, Rick Jones (rick.jones2@...com) wrote: > > Simple test included test -> desktop and vice versa traffic with 128 and > > 4096 block size in netperf-2.4.3 setup. > > Is that in conjunction with setting the test-specific -D to set > TCP_NODELAY, or was Nagle left-on? If the latter, perhaps timing issues > could be why the confidence intervals weren't hit since the relative > batching of 128byte sends into larger segments is something of a race. I used this parameters: netperf -l 60 -H kano -t TCP_STREAM -i 10,2 -I 99,5 -- -m 128 -s 128K -S 128K so without nodelay. With nodelay I've gotten: batch-128: 128.91 mbit/sec mainline-128: 140.57 mbit/sec which is about 5 times less than withouth nodelay (~760 mbit/s) Although nodelay results look more realistic. > rick jones -- 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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