[et-mgmt-tools] Windows XP Mutiprocessor Support

Sameer Naik sameer.subscriptions at damagehead.com
Tue Nov 25 10:39:35 UTC 2008


Thanks for the reply cole...
i would like to know whether i should do these changes (apic=1/acip=1)
before installing windows xp (multiprocessor) or whether it can be done
after windows xp is installed.

Thanks again

Regards
~Sameer

On Mon, Nov 24, 2008 at 9:13 PM, Cole Robinson <crobinso at redhat.com> wrote:

> Sameer Naik wrote:
> > Hi,
> > I have been using virt-manager for a long long time now.
> > Recently i have been facing an issue... when i try to install windows xp
> > (sp3) with multiprocessor
> > support (i.e. vcpu allocation > 1) the system installs fine, but then
> > virt-manager displays very high
> > cpu (24-30%) utilization, even when the xp guest is idle. also when i try
> to
> > poweroff the system, i get the "It is now
> > Safe to poweroff your computer" message and also when this message is
> > displayed the cpu utilzation is around
> > 24-30%.
> >
> > After posting a similar mail to the xend-users mailing list, i was
> advised
> > to use ACPI=1 and APIC=1 in
> > the domU configuration. But since i am using virt-manager i have no idea
> > where i should put these values and
> > whether i need to specify these before installing xp or whether it can be
> > done after installing.
> >
> > Or should i create ahand written domU configuration and use "xm create"
> to
> > create the virtual machine?
> >
> > Please Help
> >
>
> There isn't support in virt-manager for changing acpi and apic values
> of an existing guest (yet).
>
> You can change these values via the command line:
>
> virsh dumpxml vmname > xml
> edit xml: between the <os> block and the <clock> block, add
>  <features>
>    <apic/>
>    <acpi/>
>  </features>
> virsh define xml
>
> If you are using f9 or f10, the above can be simplified with the 'virsh
> edit' command, which will alter the xml in place.
>
> Thanks,
> Cole
>
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