Hi there Gryffus,
I have few questions, so if some1 could answer them i would be very
I wanna use xen for following purpose:
I'm planning to buy shiny new box and i wanna run a linux (xen?) kernel
i want to run window$ 3D applications accelerated (with working
All of this without reboot...
1) What i need to run windows XP in xen with _accelerated_ 3D? IOMMU, or
something more than that? 2 graphics cards? And which processors does
support IOMMU and what graphics card is the best for this?
At the moment you can't get 3D accelerated graphics with only one graphics
Code supporting IOMMU has recently been added to xen-unstable so it's
that you could pass through a PCI device to a Windows guest. In practice,
suspect that graphics cards haven't been tested, so passing them through
not work. It is very new support, anyhow.
I don't know of any companies who'd support 3D accelerated virtual
for you just yet :-( I expect that will change in a year or two, though.
FYI, getting 3D graphics drivers to load under Xen can be a pain even for
dom0. For that reason, you might find another VMM is more convenient to
Still, people have managed to get versions of the Nvidia and ATI drivers
working in the past... That doesn't solve the problem of accelerating
2) Is the best solution work normally on xen kernel (kde desktop, compiz,
etc....) and have window$ the only 1 guest, or 1xen kernel, and 2guests -
linux for working and 1 window$ for gaming? And how do i switch between
the VMs? Or better way is to have 1st VM running on 1st display and 2nd
on 2nd display? How?
Typically you have VNC connections to each guest in order to access the
virtual screen. Because Xen is server-oriented, most people don't do a
of interacting with the display device (which is currently a little slow).
For Unixy guests, you can also just use something like X-forwarding.
Because it's just VNC, the virtual machine displays appear in Windows.
If you're going to use the machine as a desktop, it makes sense to
with dom0 directly for normal work. I don't think you'll be doing much
gaming with Windows if you have to use the emulated graphics though :-(
Something you might find cool is VMGL - a project (still a bit
think) to give 3D acceleration to X11 (Linux, FreeBSD) virtual machines.
It's actually independent of Xen and can work with VMware.
Sorry I couldn't give you more positive news about Windows gaming under
In consolation, I guess I'd note that if you're running really demanding
games you mightn't want the CPU overhead / network of running under
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