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Number of NUMA nodes and CPU core selection for low latency systems

I use an AMD EPYC 9374F CPU with Ubuntu Server 23.04. My goal is having the lowest possible latency. I am running 1 hot path thread in a core and 3 threads for other admin works. Depending on the NUMA ...
Less-Owl-4025's user avatar
3 votes
1 answer
5k views

How can I change the distribution of Cores across NUMA-nodes?

On Ubuntu 14.04 TLS for 36 total cores = (2 x CPUs x 9 Cores x 2 HyperThreading), lscpu give me: Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little ...
Alex's user avatar
  • 131
26 votes
3 answers
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Is the amount of NUMA nodes always equal to sockets?

I have used lscpu to check two servers configuration: [root@localhost ~]# lscpu Architecture: x86_64 ...... Core(s) per socket: 1 Socket(s): 1 NUMA node(s): 1 ...
Nan Xiao's user avatar
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