Comment on We found the Missing Performance: Zen 5 Tested with SMT Disabled
conciselyverbose@sh.itjust.works 2 months ago
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.
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adarza@lemmy.ca 2 months ago
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.
conciselyverbose@sh.itjust.works 2 months ago
It’s an easy fix, sure.
But there are 3 manufacturers for them to schedule for. It should be ready way before anything ships.
ag10n@lemmy.world 2 months ago
Copilot and ads taking up development cycles
catloaf@lemm.ee 2 months ago
Actually, yeah, probably. CPU scheduling isn’t the shiny new thing, nor something that gets that sweet, sweet monthly recurring revenue. So, it doesn’t get prioritized.
SomeoneSomewhere@lemmy.nz 2 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.
barsoap@lemm.ee 2 months ago
For values of “new chips” that include 20 year old ones. Foster was released 2001, the chips were single-core but you could have up to eight on a board so it’s still multi-core SMT. First on-die multi-core SMT seemed to have been Paxville, 2005.