Re: [kvm-devel] [PATCH 0/2] Batch writes to MMIO

[Anthony L. <an...@co...>]

Avi Kivity wrote:
> Anthony Liguori wrote:
>>
>> The ne2k is pretty mmio heavy.  You should be able to observe a boost 
>> with something like iperf (guest=>host) I would think if this is a 
>> real savings.
>>
>
> If we're just improving ne2k, the complexity isn't worth it.  We have 
> two better nics which are widely supported in guests.

Sure, but the ne2k should be pretty close to an optimal synthetic 
benchmark for batching.  If we don't see a big improvement with it, 
we're probably not going to see a big improvement with it for anything.

As you point out though, the converse isn't necessarily true.

Regards,

Anthony Liguori