centos-virt-bounces@centos.org schrieb am 22.02.2012 08:14:14:

> Trey Dockendorf <treydock@gmail.com>
> Gesendet von: centos-virt-bounces@centos.org
>
> 22.02.2012 08:14
>
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> Discussion about the virtualization on CentOS <centos-virt@centos.org>
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> Re: [CentOS-virt] How many virtual guest 'cpus' can a core duo
> 'quad' core support
>
> On Tue, Feb 21, 2012 at 2:59 PM, James B. Byrne <byrnejb@harte-lyne.ca> wrote:
> > CentOS-6.2
> >
> > What is the maximum number of cpus can I configure for a
> > single vm guest running on a host with this hardware?
> >
> > # lscpu
> > Architecture:          x86_64
> > CPU op-mode(s):        32-bit, 64-bit
> > Byte Order:            Little Endian
> > CPU(s):                4
> > On-line CPU(s) list:   0-3
> > Thread(s) per core:    1
> > Core(s) per socket:    4
> > CPU socket(s):         1
> > NUMA node(s):          1
> > Vendor ID:             GenuineIntel
> > CPU family:            6
> > Model:                 23
> > Stepping:              10
> > CPU MHz:               1998.000
> > BogoMIPS:              5331.76
> > Virtualization:        VT-x
> > L1d cache:             32K
> > L1i cache:             32K
> > L2 cache:              2048K
> > NUMA node0 CPU(s):     0-3
> >
> > I ask this because it occurs to me that I may have missed
> > something fundamental respecting the use of the initialism
> > CPU vice the term Cores.
> >
> >
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>
> The maximum you can assign to a single VM is the amount of CPUs
> visible to the KVM host.  So a quad core is shows as 4 CPUs to the OS,
> so you could assign 4 vCPUs to a guest.  To see how much is available
> and seen by KVM run # virsh nodeinfo.
>
>  - Trey
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Hello,

I think thats not correct. I my case I have a HP N36L Server with one Dualcore Prozessor and 4 guest running. You can overbook the prozessor.
Maybe the performance goes down.
 

Gruß
Andreas Reschke
________________________________________________________________

Unix/Linux-Administration
Andreas.Reschke@behrgroup.com