Re: What are the rules for hyperthreaded CPUs?

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On 05.12.2011 05:26, Todd And Margo Chester wrote:
>> Hi All,
>>
>> My host has an i7-960 processor (4 cores, 8 hypterthreaded cores.)
>> /proc/cpuinfo on my host shows 8 processors.
>>
>> On my Fedora Core 16 guest, /proc/cpuinfo shows 4 processors.
>>
>> Question: what is the maximum number of processors I can assign to my
>> guest?  4 or 8?  What are the rules for Hyperthreading?
>>
>> Many thanks,
>> -T
> 
> Figured it out.  The max cores is the number of hyperthreaded cores
> (eight in my case).

The maximum number of guest vCPUs is unlimited - you can assign, say,
100 cores - each vCPU core is just a thread on host, it does not
correspond to any physical characteristics of your host.

/mjt
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