Re: TODO list for qemu+KVM networking performance v2

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Michael S. Tsirkin wrote:
> On Wed, Jun 10, 2009 at 06:18:01PM +0300, Avi Kivity wrote:
>   
>> Michael S. Tsirkin wrote:
>>     
>>> But I don't understand how aio will make implementing it easier -
>>> or are you merely saying that it will make it worthwhile?
>>>   
>>>       
>> If you have aio, the the NIC and the guest proceed in parallel.  If the  
>> guest is faster (likely), then when it sends the next packet it will see  
>> that interrupts are disabled and not notify again.  Once aio complete we  
>> can recheck the queue; if it's empty we reenable notifications.  If  
>> there's still stuff in it we submit it with notifications disabled.
>>     
>
> So you are saying that with aio we won't need this optimization at all?
> I guess it's late in the day, and my mind is fuzzy...
>   

No, I'm saying with aio the optimization becomes worthwhile.  But I 
joined late in the thread so we may be talking about different things.

-- 
error compiling committee.c: too many arguments to function

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