Re: 4 cores and 8 threads

AFAIK, the “cores” are 64-bit ALUs that can split into 32-bit pairs to run 32-bit code.

So an i7 has four x 64-bit cores that also work as 8 x 32-bit CPUs.

Threads are an OS construct, unless you want to refer to them as “real” vs. “virtual”, in which case you’d have up to four 64-bit threads or eight 32-bit threads.

I run VMWare, and I’ve never really bothered to figure out how it does its CPU mapping. I think I’ve given it two cores and 2GB of RAM and it does fine running Win 7.

(My base system is a Mac with a 2.8 GHz i7, 16 GB of RAM, and the latest OS X.)

-David Schwartz



> On Sep 6, 2016, at 3:53 PM, Keith Smith <techlists@phpcoderusa.com> wrote:
>
>
>
> Hi,
>
> If an Intel CPU has 4 cores and 8 threads will it look like 8 cores to VirtualBox when assigning resources to a guest?
>
> If so is there a way to determine which is a tread and which is actually a core?
>
> Thanks!!
> Keith
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