[Bug 217931] amd-pstate lacks crucial features: CPU frequency and boost control

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217931

--- Comment #12 from Pedro (voidpointertonull+kernelorgbugzilla@gmail.com) ---
Got to test the new changes in 6.7 , and it does work, but max frequency
changes didn't really seem to apply well.
Initially I figured that changes were just not deterministic, but later I
successfully figured that the first change (after boot?) just doesn't take
effect, and then setting the same value also doesn't make any change, so
setting a higher then desired value, then setting the desired value does the
trick.

According to htop reported values, the frequency still exceeds the maximum, but
based on both power consumption and performance, the max frequency setting does
something after all, I'm just not really sure how reliable it is, but it's neat
to have something.

Almost forgot to report here as planned, but coincidentally I needed to use
CUDA, and totally fortunately Nvidia doesn't feel like supporting the latest
kernel yet, so I'm back on 6.5 and I get to enjoy the heat again with long
running test which reminded me of this bug report.

So generally recommending updating to 6.7 if this feature is really desired.
I'm surely missing it, the stupid high frequency by default is okay for bursty
tasks, but it's definitely great to be able to restrict it on demand.

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