This seems to be fake, probably pinned manually. If I create 8 threads on my Ryzen, it still distributes them over all logical cores. It only looks like it is trying to avoid SMT core, but the spikes are all over the place.
Edit: This is what it looks like with 8 Prime95 threads for me:
For all we know microsoft did not change anything except update some drivers , i vaguely remember amd stating the windows ryzen driver would be updated like a month or so after release.
Core parking works if/when you want to save power, it's mostly useless otherwise, even for Intel processors. The fact that something like a process lasso does a better job at handling core parking & unparking, not to mention setting affinities or even I/O & memory priority, than Windows itself is testament to the shellacking Microsoft's done to their OS. The Android governors on the other hand are much better at handling multiple cores, thanks in part due to big little, remember how octa cores were ridiculed on phones & yet Windows is the one that can't handle 8 cores properly.
Have to answer again. Somehow you look familar, BTW. 😉
It's not exactly, what one gets in GB/s by calculating mem clock [GHz] * 32 because of a GB being 1.074 billion bytes, but it gives a good impression.
