Re: [Xen-users] Windows domU opitimization

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Sat, Feb 27, 2010 at 03:18:29PM +0100, Sylvain Viollat wrote:
> 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...
>

See:
http://wiki.xensource.com/xenwiki/XenBestPractices

-- Pasi

> 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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> http://lists.xensource.com/xen-users

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