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Old 09-14-2021, 06:35 AM   #1
B612
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Registered: Feb 2018
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Socket, core, threads, CPUs and lscpu


Hello

We have a server with this lscpu output

[root@ids]# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 64
On-line CPU(s) list: 0-63
Thread(s) per core: 2
Core(s) per socket: 16
Socket(s): 2
NUMA node(s): 2
Vendor ID: GenuineIntel
CPU family: 6
Model: 85
Model name: Intel(R) Xeon(R) Gold 6130 CPU @ 2.10GHz


I can see that we have
2 sockets
each socket has 16 cores
So I expected 32 CPUs, but we have 64.

Are the threads are counted as CPUs ?

Thanks
 
Old 09-14-2021, 06:43 AM   #2
syg00
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Hardware threads are counted as execution units - sometimes called CPUs or cores. The devil is in the detail.
Do a search on SMT for the gory details.
 
Old 09-14-2021, 06:53 AM   #3
B612
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