Re: [Xen-devel] pvUSB backend performance

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Wed, 2015-06-24 at 14:06 +0200, Juergen Gross wrote:
> Hi,
> 
> my qemu integrated pvUSB backend is now running stable enough to do
> some basic performance measurements. I've passed a memory-stick with
> about 90MB of data on it to a pv-domU. Then I read all the data on
> it with tar and looked how long this would take (elapsed time):
> 
> in dom0:                     5.2s
> in domU with kernel backend: 6.1s
> in domU with qemu backend:   8.2s
> 
> So the qemu backend is about 30% slower than the kernel backend. Is
> this acceptable?
> 
If I can ask (I know nothing about USB, let alone pvUSB! :-O), and if
you happen to know, what's the situation of other hypervisors, in term
both of support and performance?

Regards,
Dario

-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
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Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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