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Date: Thu, 11 Nov 2010 12:49:52 +0200
From: Eugene Perevyazko <john@dnepro.net>
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Subject: Re: igb dual-port adapter 1200Mbps limit - what to tune?
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On Thu, Nov 11, 2010 at 01:47:02AM +0100, Ivan Voras wrote:
> On 11/10/10 12:04, Eugene Perevyazko wrote:
> 
> >CPU is E5620@2.4GHz, 8 cores, irqs bound to different cores skipping HT 
> >ones.
> 
> Unless you need the CPU cores for other tasks on the server, they won't 
> help you with network throughput here. Faster but fewer cores might.
> 
> >Tried 2 queues and 1 queue per iface, neither hitting cpu limit.
> 
> Are you sure you are not hitting the CPU limit on individual cores? Have 
> you tried running "top -H -S"?
> 
Sure, even with 1queue per iface load is 40-60% on busy core, with 2 queues it was much lower.
Now I've got the module for mb with 2 more ports, going to see if it helps.

-- 
Eugene Perevyazko