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

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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