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Groups > linux.debian.user > #242551
| From | "Paul M. Foster" <paulf@quillandmouse.com> |
|---|---|
| Newsgroups | linux.debian.user |
| Subject | Re: Non-working CPU cores showing up |
| Date | 2021-11-30 17:30 +0100 |
| Message-ID | <DpeaZ-7Wk-1@gated-at.bofh.it> (permalink) |
| References | <Dp5U7-2Zf-9@gated-at.bofh.it> <Dp9O2-5i2-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 11/30/21 6:24 AM, Dan Ritter wrote: > 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- > It appears you are correct. lscpu shows this CPU has 4 cores, and 2 threads per core. But it shows 8 CPUs. Silly. Paul
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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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