Re: Non-working CPU cores showing up
On Tue, 2021-11-30 at 02:30 -0500, Paul M. Foster wrote:
> Folks:
>
> Here's a curious thing. I have a 10th gen Intel i3 CPU with four cores.
> When I look at /proc/cpuinfo, it actually shows eight cores. There's a
> line in the output of each core which is
>
> cpu cores : 4
>
> But there are outputs for each of eight cores, numbered 0 through 7.
>
> Is it possible that there were eight cores on this CPU, and four of them
> were non-working (I know it's typical to have non-working cores on a
> die), and this file shows all the original cores?
>
> Or does someone have a better explanation?
That each core supports Symmetric Multi-Threading (SMT), AKA
Hyperthreading, so appears to software as two CPUs. This is common for
most modern x86 CPUs. (Though the one I'm typing this on actual 8 CPUs
without hyper-threading).
--
Tixy
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