Re: Non-working CPU cores showing up

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From	Dan Ritter <dsr@randomstring.org>
Newsgroups	linux.debian.user
Subject	Re: Non-working CPU cores showing up
Date	Tue, 30 Nov 2021 12:50:02 +0100
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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-

Thread

Non-working CPU cores showing up "Paul M. Foster" <paulf@quillandmouse.com> - 2021-11-30 08:40 +0100
  Re: Non-working CPU cores showing up Kenneth Parker <sea7kenp@gmail.com> - 2021-11-30 08:50 +0100
  Re: Non-working CPU cores showing up Tixy <tixy@yxit.co.uk> - 2021-11-30 08:50 +0100
  Re: Non-working CPU cores showing up Felix Miata <mrmazda@earthlink.net> - 2021-11-30 09:40 +0100
  Re: Non-working CPU cores showing up piorunz <piorunz@gmx.com> - 2021-11-30 12:00 +0100
  Re: Non-working CPU cores showing up Eric S Fraga <e.fraga@ucl.ac.uk> - 2021-11-30 12:10 +0100
  Re: Non-working CPU cores showing up Dan Ritter <dsr@randomstring.org> - 2021-11-30 12:50 +0100
    Re: Non-working CPU cores showing up "Paul M. Foster" <paulf@quillandmouse.com> - 2021-11-30 17:30 +0100
      Re: Non-working CPU cores showing up Ken Cunningham <ken.cunningham.webuse@gmail.com> - 2021-11-30 18:00 +0100
        Re: Non-working CPU cores showing up Dirk Neumann <neum_d@yahoo.de> - 2021-12-01 08:40 +0100
          Re: Non-working CPU cores showing up Ken Cunningham <ken.cunningham.webuse@gmail.com> - 2021-12-01 09:40 +0100
      Re: Non-working CPU cores showing up Tixy <tixy@yxit.co.uk> - 2021-11-30 18:20 +0100

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