netdev - Re: [RFC] New driver API to speed up small packets xmits

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Date:	Thu, 10 May 2007 13:49:44 -0700
From:	Rick Jones <rick.jones2@...com>
To:	David Miller <davem@...emloft.net>
Cc:	vladislav.yasevich@...com, ian.mcdonald@...di.co.nz,
	krkumar2@...ibm.com, johnpol@....mipt.ru, netdev@...r.kernel.org
Subject: Re: [RFC] New driver API to speed up small packets xmits

David Miller wrote:
> From: Vlad Yasevich <vladislav.yasevich@...com>
> Date: Thu, 10 May 2007 15:21:30 -0400
> 
> 
>>The win might be biggest on a system were a lot of applications send
>>a lot of small packets.  Some number will aggregate in the prio
>>queue and then get shoved into a driver in one go.
>>
>>But...  this is all conjecture until we see the code.
> 
> 
> Also, whatever you gain in cpu usage you'll lose in latency.
> 
> And things sending tiny frames are exactly the ones that care about
> latency.

I'd think one would only do this in those situations/places where a natural "out 
of driver" queue develops in the first place wouldn't one?

rick jones
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