[Gllug] performance of xen dom0 vs native linux

[Nahuel Marisi]

Hi there,
I'm currently using xen for various experiments (as it's much easier and
cheaper than running two or three linux boxes).
As I tend to use Xen frequently I usually boot directly into it even when I
don't actually fire up any VMs.

I was wondering what's the difference in performance between linux running
in dom0 and no VMs (domUs) running compared to native linux.
Obviously if you use something like virtualbox when there are no VMs running
you just have linux running natively so you have no performance penalties.
Is it the same if you're running Xen with no hosts?

Does it affect the way linux runs in any way?

Thanks for your help
Nahuel
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