On 3/12/2011 9:53 AM, Todd And Margo Chester wrote:

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-------- Original message -------- Subject: Re: [libvirt-users] Can I configure cores instead of CPU's From: Todd And Margo Chester<toddandmargo@gmail.com> To: "libvirt-users@redhat.com"<libvirt-users@redhat.com> CC:

Hi All,

Scientific Linux 6.1 x64 qemu-kvm-0.12.1.2-2.160.el6_1.2.x86_64

My XP-Pro guest will only let me use two CPUs. Is there a way I can tell Virt-Manager to use one CPU with six cores instead of four separate CPUs?

I can manually insert things with virsh edit KVM-WinXP

Currently, I have: <vcpu>6</vcpu>

I found an example of a run string:

-smp 2,sockets=2,cores=1,threads=1

But I will be darned if I can figure out the virsh xml syntax.

Many thanks, -T On 12/02/2011 05:32 PM, Frank Hauptle wrote: Yes under advanced in cpu in virt manager are socket /core settings. i use a fedora virt manager to connect to sl61 libvirt. more options that way.

I configured my processor in virt-mamager:

CPU's: Current Allocation: 2 Manual set CPU Topology: Sockets: 1 Cores: 6 Threads: 1

or from my XML file

<vcpu>1</vcpu> <cpu> <topology sockets='1' cores='6' threads='1'/> </cpu>

I still get two CPUs in my guest XP-Pro.

What am I doing wrong?

-T On 12/03/2011 07:40 PM, Frank Hauptle wrote: I'm not even sure XP could differentiate between a core and a socket as multicore CPU's were not common to x86 in 2000 when XP was released.

If you want to see if it really worked, download a knoppix CD and mount the ISO in the CDrom of that VM, then set it to boot from the CDROM.

When knoppix boots up, open a terminal and type:

cat /proc/cpuinfo

See what it gives you.

I think the hardware info GUI app in knoppix will give you more info too.

cheers

Frank

Hi Frank, I have FC16 live CD as a guest. /proc/cpuinfo said I had four cpu's. Given a bit of time I can give you the full report if that would help. My host CPU is an i7-960 (four real cores, eight hyperthreaded cores.) -T