[Bug 219851] [amd-pstate 6.15] Frequency Scaling Will Not Scale Above Lowest Non-Linear Performance on Ryzen 7 5700U

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219851

--- Comment #3 from Eric Naim (dnaim@cachyos.org) ---
(In reply to Dhananjay Ugwekar (AMD) from comment #2)
> Hello Eric,
> 
Hi Dhananjay,

Unfortunately the user that first reported this issue hasn't reached out to me
since, so for now I'll give you information regarding what I already know.

> 1. Could you please give more details on how to reproduce the issue? which
> governor, amd-pstate mode (when the issue was observed), workload. Are you
> able to reproduce the issue on your machine as well?

No STR was given, from the lack of info I believe it's just a general case,
e.g. if you run `stress-ng -c $(nproc)`, you *should* see the issue (entirely
speculation). This regression only happens with the active driver. Both passive
and guided mode was reported to behave correctly.

I can't reproduce this either because my laptop is a Zen3 laptop. It is likely
that it is limited to Zen2.

> 2. Just to confirm, does the user have
> https://web.git.kernel.org/pub/scm/linux/kernel/git/superm1/linux.git/commit/
> ?h=amd-pstate-v6.15-2025-03-03&id=f6c0b760290951688697d9debbb2b8462c423a48,
> in his tree, it fixed a corner case in the culprit commit that you pointed
> to.

Yes, you can see the related tree
https://github.com/CachyOS/linux/tree/6.14/amd-pstate. It's not 1:1 with
Mario's tree but I diffed both trees and the only difference was commit
34562659110a42276d63f8b5a9d522d2400b2df2 which is from the "Dynamic ITMT core
ranking support" series.

> 
> Thanks, 
> Dhananjay

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are the assignee for the bug.