Re: [Xen-users] maximum domU performance

[Bruce Edge <bruce.edge@xxxxxxxxx>]

On Tue, Oct 13, 2009 at 11:31 PM, Fajar A. Nugraha <fajar@xxxxxxxxx> wrote:
> On Wed, Oct 14, 2009 at 10:33 AM, Zu <zuzhihui@xxxxxxxxx> wrote:
>> The hardware has dual quad core CPUs and 8GB RAM. It has only 1 domU.
>> I want to configure the domU and let the domU has maximum performance.
>> So I configure "vcpus=8" in the domU configure file. Is this right? Do
>> I need to add any other directions?
>
> assuming is doesn't support hyperthreading (or hyperthreading
> disabled), I'd set it to 7 (i.e. 8-1). dom0 needs CPU as well you
> know, and it's best to give dom0 a dedicated CPU/core.
>
> --
> Fajar
>

What if the dom0 has no tasks once the domU is up and running?
eg: disable syslog, cron, etc on dom0
Can one assign all cores to the domU?
Or, must one core remain idle dedicated to handling dom0 processing?

-Bruce

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