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Re: [Qemu-discuss] Any one have successfully make window 7 guest in kvm
Re: [Qemu-discuss] Any one have successfully make window 7 guest in kvm use more than 2 cpus/cores?
Wed, 23 Jul 2014 19:23:57 -0700
Depending on your version of Windows 7, your license supports either
one or two CPU and any number of cores.
On Wed, Jul 23, 2014 at 6:45 PM, Scott Zhang <address@hidden> wrote:
> that is interesting. i use my opensuse 13.1 with i7 4cores.cpu and run win7
> as guest. win7 show 4 cpus correctly. guess the problem with fedora kvm or
> the xeon cpu. will try later to confirm
> On Jul 24, 2014 12:35 AM, "Jakob Bohm" <address@hidden> wrote:
>> On 7/23/2014 6:22 PM, Sai Prajeeth wrote:
>>> 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.
>> Unlikely to work. Windows 7 (unlike the more expensive server licenses
>> for the same kernel) enforces a license restriction of max 2 physical
>> CPUs, each with unlimited cores (subject to the kernel design maximum
>> of at least 32).
>> But try looking at the command line of the running qemu process. Does
>> it actually specify 2 sockets with 4 cores each, or were the settings
>> somehow mistranslated from libvirt XML to qemu command line?
>> Also, if you are using a computer with more than 2 physical sockets,
>> you may want to check if kvm passes through the physical or the command
>> line CPU topology to the guest.
>>> On Wed, Jul 23, 2014 at 9:38 PM, Scott Zhang <address@hidden
>>> <mailto: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?
>>> Scott Zhang
>> Jakob Bohm, CIO, Partner, WiseMo A/S. http://www.wisemo.com
>> Transformervej 29, 2730 Herlev, Denmark. Direct +45 31 13 16 10
>> This public discussion message is non-binding and may contain errors.
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