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We found the Missing Performance: Zen 5 Tested with SMT Disabled
(www.techpowerup.com)
This is a most excellent place for technology news and articles.
There should be no need for tuning, tweaking, or optimizing on functionality this basic.
If you ask the processor, it will spit out a graph like this telling you what threads/cores share resources, all the way up to (on large or server platforms) some RAM or PCIe slots being closer to certain groups of cores.