[Xen-users] Windows domU opitimization

[Sylvain Viollat <sviollat@xxxxxxxxxxxxx>]

Hello,

I'm new to Xen and after properly configured a couple of Linux based 
VMs, I'm giving a try to a Windows XP domU.
Installation is going just fine, network performances are pretty good 
after installing the gplpv driver (1Gb link properly recognized), but 
opening a session and usage is very slow through RDP.
I've allocated 2Go of memory and 2 procs to the VM but it's still very slow.

Dom0 configuration is pretty robust :
- 2x Xeon 1.6GHz
- 6Go memory (will soon be upgraded to 12Go)
- Linux Debian stable

With running 2 Windows domU (so 2x 2Go allocated to the VMs) and a Linux 
domU (512Mo and 1 proc.), the available memory on the dom0 decrease to 
less than 200Mo, what negatively impact the VMs performances I think...
While google-ing around, I've read that adding dom0_mem=<VALUE> to the 
kernel entry in grub permit to assign a specific amount of memory to the 
dom0 host.
My questions is do you think if I assign 2Go (dom0_mem=2048M) to dom0 
host, this could optimize the global performances of the Windows domU ?
Linux based domU are running really fine and won't be that loaded (no 
GUI installed on them).
Thanks for your feedback.

Sylvain.

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