What are the rules for hyperthreaded CPUs?

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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).

My mistake was that in virt-manager, processor, I was not clicking
on "Copy host CPU configuration" button.  Without that, everything
I tried to configure came out as single CPUs.

-T
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