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

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Date: Mon, 19 Feb 2024 01:02:58 +0000
From: "Meng, Li (Jassmine)" <Li.Meng@....com>
To: Lucas Lee Jing Yi <lucasleeeeeeeee@...il.com>, "rafael@...nel.org"
	<rafael@...nel.org>
CC: "Yuan, Perry" <Perry.Yuan@....com>, "Du, Xiaojian" <Xiaojian.Du@....com>,
	"Deucher, Alexander" <Alexander.Deucher@....com>, "bp@...en8.de"
	<bp@...en8.de>, "Sharma, Deepak" <Deepak.Sharma@....com>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>, "Limonciello, Mario"
	<Mario.Limonciello@....com>, "Fontenot, Nathan" <Nathan.Fontenot@....com>,
	"oleksandr@...alenko.name" <oleksandr@...alenko.name>,
	"rafael.j.wysocki@...el.com" <rafael.j.wysocki@...el.com>, "Huang, Ray"
	<Ray.Huang@....com>, "Huang, Shimmer" <Shimmer.Huang@....com>,
	"skhan@...uxfoundation.org" <skhan@...uxfoundation.org>,
	"viresh.kumar@...aro.org" <viresh.kumar@...aro.org>, "x86@...nel.org"
	<x86@...nel.org>
Subject: RE: [PATCH V14 0/7] amd-pstate preferred core

[AMD Official Use Only - General]

Hi :
Thanks.
I will check this issue and fix it as soon as possible.

> -----Original Message-----
> From: Lucas Lee Jing Yi <lucasleeeeeeeee@...il.com>
> Sent: Monday, February 19, 2024 12:11 AM
> To: rafael@...nel.org
> Cc: Yuan, Perry <Perry.Yuan@....com>; Du, Xiaojian
> <Xiaojian.Du@....com>; Deucher, Alexander
> <Alexander.Deucher@....com>; bp@...en8.de; Sharma, Deepak
> <Deepak.Sharma@....com>; Meng, Li (Jassmine) <Li.Meng@....com>;
> linux-acpi@...r.kernel.org; linux-kernel@...r.kernel.org; linux-
> kselftest@...r.kernel.org; linux-pm@...r.kernel.org; Limonciello, Mario
> <Mario.Limonciello@....com>; Fontenot, Nathan
> <Nathan.Fontenot@....com>; oleksandr@...alenko.name;
> rafael.j.wysocki@...el.com; Huang, Ray <Ray.Huang@....com>; Huang,
> Shimmer <Shimmer.Huang@....com>; skhan@...uxfoundation.org;
> viresh.kumar@...aro.org; x86@...nel.org
> Subject: Re: [PATCH V14 0/7] amd-pstate preferred core
>
> Caution: This message originated from an External Source. Use proper
> caution when opening attachments, clicking links, or responding.
>
>
> 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