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We found the Missing Performance: Zen 5 Tested with SMT Disabled (www.techpowerup.com)

submitted 3 months ago by [email protected] to c/[email protected]

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[–] [email protected] 71 points 3 months ago (8 children)

During the course of our testing, we observed that Windows 11 was scheduling workloads on the 9700X in a manner that would try to saturate a single core first, by placing workloads on each of its logical threads.

🤦‍♀️

[–] [email protected] 31 points 3 months ago (6 children)

so, basically, the os isn't tuned for the new chips yet.

the 2nd threads on smt-enabled cores are supposed to get hit last.

[–] [email protected] 13 points 3 months ago

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.

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