[Bug 215800] amd-pstate does not allow to set arbitrary maximum CPU frequency above 2200MHz for a desktop Zen 3 CPU

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215800

--- Comment #12 from Artem S. Tashkinov (aros@gmx.com) ---
(In reply to Joe from comment #11)
> OK, so it seems you change the scaling_max_freq to 2.2G, after that, even
> you change back to 3G or cpuinfo_max_freq, the scaling_cur_freq is still
> less than 2.2GHz.
> 
> I tried 2 devices on my local, can not reproduce this issue.
> 
> After you set scaling_max_freq to 3G or higher, You can try to run "stress
> --cpu 128" with increasing the workload to check if the scaling_cur_freq can
> exceeds 2.2GHz.

I've run tests now a dozen times already: once I change cpuinfo_max_freq my CPU
never goes above 2.2GHz no matter what I do even if I restore the value stored
in this variable/file.

This is further corroborated by more than halved performance and decreased
power consumption - it doesn't go above ~55W.

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