> Trey Dockendorf <treydock@xxxxxxxxx>
> Gesendet von: centos-virt-bounces@xxxxxxxxxx
>
> 22.02.2012 08:14
>
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> Discussion about the virtualization on CentOS <centos-virt@xxxxxxxxxx>
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> Discussion about the virtualization on CentOS <centos-virt@xxxxxxxxxx>
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> Re: 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@xxxxxxxxxxxxx> 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
________________________________________________________________
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