Re: [Qemu-discuss] Any one have successfully make window 7 guest in kvm use more than 2 cpus/cores?

[Scott Zhang]

Thanks for reply.

 

I think no need to try sockets=2. I read windows 7 only support UP to 2 socket, this is hard limit. So we need to use cores to workaround this.

Reason:

http://serverfault.com/questions/101434/why-does-my-windows-7-vm-running-under-linux-kvm-not-use-all-the-virtual-proces

 

Share two blogs who claim they made it but I am unlucky.

https://blog.ttrsite.net/2011/08/kvm-and-windows-using-virtio-drivers-and-multi-core-setup/

http://www.openwebit.com/c/how-to-run-windows-vm-on-more-than-2-cores-under-kvm/

 

2014-07-24

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Scott Zhang

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发件人：Sai Prajeeth <address@hidden>

发送时间：2014-07-24 05:52

主题：Re: [Qemu-discuss] Any one have successfully make window 7 guest in kvm use more than 2 cpus/cores?

收件人："Scott Zhang"<address@hidden>

抄送："qemu-discuss"<address@hidden>

 

Try setting sockets=6,cores=1? I had this issue when running Solaris as guest. For some reason Solaris never detected any of the cores. It could only detect the sockets.

On Wed, Jul 23, 2014 at 9:38 PM, Scott Zhang <address@hidden> wrote:

Dear all:

   I have been trying this for whole afternoon and whole night. I have installed windows 7 as guest in kvm using virt-manager which use qemu. And after I alloc it 6 vcpus, I noticed win7 only see 2 cpus in task manager. But in device manager, it shows 6 cpus. After google a lot, looks many people say they workaround this by setting the topology of CPU, which is technical correct.

   But when I try to set sockets=2,cores=4 and several vairable pairs. None is working. Win7 only see 2 at most. I am using fedora 20 with kernel 3.15 and the default qemu.

   Can any one help?

 

Thanks

Regards

2014-07-24

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Scott Zhang