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Dual Socket EPYC 7702 64 cores shows 254 CPU online 1 CPU offline... Bad CPU?

Question asked by sho1sho1sho1 on Dec 19, 2019
Latest reply on Jan 9, 2020 by sho1sho1sho1

Hi all,

 

Trying to install CentOS 7 with Dual socket AMD EPYC 7702 64 cores server and it didn't work.  Then I tried CentOS 8 and installed, but lscpu shows core 255 offline?  Do I have a bad core that failed to multi-thread?

Or is this an OS bug in which I need the ELRepo kernel-ml?

 

Architecture:         x86_64

CPU op-mode(s):       32-bit, 64-bit

Byte Order:           Little Endian

CPU(s):               256

On-line CPU(s) list:  0-254

Off-line CPU(s) list: 255                  ß-----------------------

Thread(s) per core:   1

Core(s) per socket:   64

Socket(s):            2

NUMA node(s):         2

Vendor ID:            AuthenticAMD

CPU family:           23

 

Thanks for your help in advance!

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