linux-kernel - Re: [PATCH V14 0/7] amd-pstate preferred core

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Message-ID: <20240218161435.38312-1-lucasleeeeeeeee@gmail.com>
Date: Mon, 19 Feb 2024 00:10:30 +0800
From: Lucas Lee Jing Yi <lucasleeeeeeeee@...il.com>
To: rafael@...nel.org
Cc: Perry.Yuan@....com,
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	alexander.deucher@....com,
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Subject: Re: [PATCH V14 0/7] amd-pstate preferred core

Dear all,
I have found an issue with the patchset when applying on 6.7, leading to a large degradation in performance.

On my 7840HS on *STOCK* 6.7 highest_perf is reported as 196, not 166 as assumed in the patchset. Applying the patchset causes highest_perf to be misreported and hence a misreported maximum frequency as well, at 4.35GHz instead of 5.14GHz, leading to the degradation in performance.
However, On my 5950X, highest_perf is indeed reported as 166 before and after applying the patchset.

Hence, I propose the following patch (should be attached).

I do apologize for any mistakes as I am new to this and this is my first email on the mailing list.

Cheers!
Lucas