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Date: Fri, 8 Jun 2007 17:01:21 +0530 From: Krishna Kumar2 <krkumar2@...ibm.com> To: hadi@...erus.ca Cc: David Miller <davem@...emloft.net>, Gagan Arneja <gaagaan@...il.com>, Evgeniy Polyakov <johnpol@....mipt.ru>, netdev@...r.kernel.org, Rick Jones <rick.jones2@...com>, Robert Olsson <Robert.Olsson@...a.slu.se>, Sridhar Samudrala <sri@...ibm.com> Subject: Re: [WIP][PATCHES] Network xmit batching Hi Jamal, J Hadi Salim <j.hadi123@...il.com> wrote on 06/08/2007 04:44:06 PM: > That should be fine as long as the sender is running the patched > 2.6.22-rc4 Definitely :) > Thats interesting - it is possible there is transient burstiness which > fills up the ring. > My observation of your results (hence my comments): for example the > buffer size = 8B, TCP 1 process you achieve less than 70M. That is less > than 100Kpps on average being sent out. Very very tiny - so it is > interesting that it is causing a shutdown. I thought it comes to 1.147Mpps, or did I calculate wrong (70*1024*1024/8/8) ? > Also note something else strange that it is kind of strange that > something like UDP which doesnt backoff will send out less > packets/second ;-> Cannot explain that either :) > BTW, another interesting things to do is ensure that several netperfs > are running on different CPUs. My script was doing that earlier, I trimmed all that to make it easier to understand. Will post the larger version later. > no problem. Thanks, please let me know what you think of the patch I sent earlier. I am running a larger 5 iteration run with buffer sizes :8,32,128,512,1 K,4K,16K. It is going to run for around 12 hours and since I am moving house during the weekend, I will be able to look at the results only on Monday. Regards, - KK - 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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