Re: [Xen-devel] pvUSB backend performance

[Juergen Gross <jgross@xxxxxxxx>]

On 06/25/2015 10:53 AM, Dario Faggioli wrote:
> 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?
No specific knowledge, sorry.


Juergen


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