[CentOS-virt] 4 CPU with WinXP on Centos 5.5 KVM?

Fri May 28 15:55:26 UTC 2010
Marcelino Mata <mmata at multimatic.com>

> >
> > AFAIK KVM will always emulate CPUs not cores.
> >   
> In fact, newer qemu/kvm supports "cores" parameter when used 
> with smp: 
> https://patchwork.kernel.org/patch/33961/
> RHEL6 beta has new kvm and qemu - it is possible to use 
> multi-core CPU within virtualized winXP there.
> Regards,
>     Nenad

I did mean cores not CPU's.  I am using Xeon W3520 (4 Core 2.67Ghz).

Under Virtualbox, WinXP guest has no problem using all four cores with
same Xeon W3520 computer.  

So far this appears to be limitation of KVM/Virtio drives with XP
guests.  It does not appear to be KVM limitation since liveCD boot
instead of XP.img boot shows 4 cores.

I'm really only wanted confirmation that limitation can NOT be worked

While Virtualbox did not have this issue, it had other problems which
made KVM a better solution.

Running this under Windows 2003 server is also an option if it
eliminates the 4 core problem.


Marcelino Mata
Engineering Technology Specialist
Multimatic Technical Centre
85 Valleywood Drive
Markham, ON
L3R 5E5
Tel.   +1 905 470 0025

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