Subject: Re: [GIT PULL] AlacrityVM guest drivers for 2.6.33

From: Avi Kivity <[email-masked]>
Date: Wed, 23 Dec 2009 14:48:35 +0200

On 12/23/2009 02:14 PM, Andi Kleen wrote:
>> http://www.redhat.com/f/pdf/summit/cwright_11_open_source_virt.pdf
>>
>> See slide 32.  This is without vhost-net.
>>      
> Thanks. Do you also have latency numbers?
>    

No.  Copying Chris.  This was with the tx mitigation timer disabled, so 
you won't see the usual atrocious userspace virtio latencies, but it 
won't be as good as a host kernel implementation since we take a 
heavyweight exit and qemu is pretty unoptimized.

> It seems like there's definitely still potential for improvement
> with messages<4K. But for the large messages they indeed
> look rather good.
>    

There's still a lot of optimization to be done, but I hope this proves 
there is nothing inherently slow about virtio.

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