Re: [Xen-users] Windows on Xen+VT

[Anthony Liguori <aliguori@xxxxxxxxxx>]

Mark Williamson wrote:

> > Okay so I did 2)... Windows not runs stably and fine on Xen. But really
> > really slow though. I tried 3) but no help speeding the system up. I could
> > really do with a few hints on how to speed up VMX domains though...
> >    
> I'm not sure if it's known to be very fast - it's not going to fully optimised 
> in the 3.0 release, AFAIK.
> Are benchmarks running slower than expected on it?  (I know you can't publish 
> them but they might be interesting to look at).  Bear in mind that the QEmu 
> display device we're using is sluggish even under QEmu.
>  
The current VT architecture is a proof-of-concept.  Every IO operation 
takes a bunch of context switches.  There are a bunch of people working 
on a new architecture that won't suffer from this problem.
Regards,

Anthony Liguori

> Cheers,
> Mark
>
>  
>
> > Quoting John Wilson <j.wilson@xxxxxxxxxxxxxxxxxxxxxxxx>:
> >    
> >
> > > To all you guys who have managed to get Windows up on Xen...
> > >
> > > Its early days for me as I only figured out how to get it up and running
> > > through vnc today, but basically it runs rather slowly, and I wonder if
> > > anyone has any experience on 'best practices' and such when creating
> > > WinXP virtual machines.
> > >
> > > I'm currently using an image that boots to windows setup I made using
> > > QEMU, and it boots fine, tells me its resuming setup, then blue screens
> > > with a reference to an infinite loop being detected in the framebuf
> > > driver. (Although I think it might just be detecting extreme slowness as
> > > this infinite loop).
> > >
> > > 1) So how to speed it up/why would it be going so slowly? (my linux VMX
> > > machines don't exactly burn rubber either)
> > > 2) Should I fully install windows onto the image with QEMU first?
> > > 3) Should the video output be configured for full screen, as opposed to
> > > windowed as it is currently?
> > > 4)Is there any possibility at all that a VMX domain (especially windows)
> > > could be run on a non-VT machine? (Beacause its a very new pre-production
> > > bios and platform, and even though it's set up in the bios for VT, I
> > > don't really trust it and it seems a little suspiciously slow... I
> > > suppose I could test this in the lab really:-)
> > > 5) Anything else I should know?
> > >
> > >
> > > John
> > >
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>  

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