Re: Non-working CPU cores showing up

[Dan Ritter <dsr@randomstring.org>]

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?
> 

Try lscpu. Useful lines:

CPU(s):                          12
On-line CPU(s) list:             0-11
Thread(s) per core:              2
Core(s) per socket:              6
Socket(s):                       1

So this machine has one socket, 6 cores in the socket, 2 threads
per core, which looks like 12 CPUs.

You should find that your has one socket, 4 cores in the socket,
2 threads per core, which looks like 8 CPUs.

-dsr-