libvirt users - Jan 2015 - Re: Windows Guest ignores CPU topology settings on Ubuntu Lucid host

I try to assign 8 host cores to Windows 2003 Server Standard guest. 
Because this OS version has a limit of 4 sockets, I have to change the 
CPU topology. My guest definition:

   <vcpu>8</vcpu>
   <cpu match='minimum'>
     <model>core2duo</model>
     <topology sockets='4' cores='1' threads='2'/>
   </cpu>

doesn't work as expected. I should have 4 CPUs in the Device Manager and 
8 CPU charts in Task Manager, but I have the opposite. And no matter 
what numbers I set in the topology, the guest always detects 8 sockets. 
What am I doing wrong?

libvirt 0.7.5
qemu-kvm 0.12.3
-- 
Karol Jędrzejczyk

On 23.01.2015 13:50, Karol Jędrzejczyk wrote:
> I try to assign 8 host cores to Windows 2003 Server Standard guest.
> Because this OS version has a limit of 4 sockets, I have to change the
> CPU topology. My guest definition:
> 
>   <vcpu>8</vcpu>
>   <cpu match='minimum'>
>     <model>core2duo</model>
>     <topology sockets='4' cores='1'
threads='2'/>
>   </cpu>
> 
> doesn't work as expected. I should have 4 CPUs in the Device Manager
and
> 8 CPU charts in Task Manager, but I have the opposite. And no matter
> what numbers I set in the topology, the guest always detects 8 sockets.
> What am I doing wrong?
> 
> libvirt 0.7.5
> qemu-kvm 0.12.3
Probably this ^^^. That's rather ancient libvirt and qemu. Try to upgrade.

Michal

W dniu 2015-01-26 o 12:48, Michal Privoznik pisze:
> On 23.01.2015 13:50, Karol Jędrzejczyk wrote:
>> I try to assign 8 host cores to Windows 2003 Server Standard guest.
>> Because this OS version has a limit of 4 sockets, I have to change the
>> CPU topology. My guest definition:
>>
>>    <vcpu>8</vcpu>
>>    <cpu match='minimum'>
>>      <model>core2duo</model>
>>      <topology sockets='4' cores='1'
threads='2'/>
>>    </cpu>
>>
>> doesn't work as expected. I should have 4 CPUs in the Device
Manager and
>> 8 CPU charts in Task Manager, but I have the opposite. And no matter
>> what numbers I set in the topology, the guest always detects 8 sockets.
>> What am I doing wrong?
>>
>> libvirt 0.7.5
>> qemu-kvm 0.12.3
>
> Probably this ^^^. That's rather ancient libvirt and qemu. Try to
upgrade.
Upgraded, everything works, thank you.
-- 
Karol Jędrzejczyk