linux-kernel - Re: [Patch v7] ACPI: processor: reduce CPUFREQ thermal reduction pctg for Tegra241

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Message-ID: <CAJZ5v0jT=xhTcAHKUMPJR2VbpFNLm1aX-CrcB70Man+VbQX-yQ@mail.gmail.com>
Date:   Wed, 6 Dec 2023 20:55:19 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Hanjun Guo <guohanjun@...wei.com>, Sumit Gupta <sumitg@...dia.com>
Cc:     Sudeep Holla <sudeep.holla@....com>, rafael@...nel.org,
        rui.zhang@...el.com, lenb@...nel.org, lpieralisi@...nel.org,
        linux-acpi@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        treding@...dia.com, jonathanh@...dia.com, bbasu@...dia.com,
        sanjayc@...dia.com, ksitaraman@...dia.com, srikars@...dia.com,
        jbrasen@...dia.com
Subject: Re: [Patch v7] ACPI: processor: reduce CPUFREQ thermal reduction pctg
 for Tegra241

On Thu, Nov 23, 2023 at 3:32 PM Hanjun Guo <guohanjun@...wei.com> wrote:
>
> On 2023/11/23 22:00, Sudeep Holla wrote:
> > On Thu, Nov 23, 2023 at 05:44:33PM +0530, Sumit Gupta wrote:
> >> From: Srikar Srimath Tirumala <srikars@...dia.com>
> >>
> >> Current implementation of processor_thermal performs software throttling
> >> in fixed steps of "20%" which can be too coarse for some platforms.
> >> We observed some performance gain after reducing the throttle percentage.
> >> Change the CPUFREQ thermal reduction percentage and maximum thermal steps
> >> to be configurable. Also, update the default values of both for Nvidia
> >> Tegra241 (Grace) SoC. The thermal reduction percentage is reduced to "5%"
> >> and accordingly the maximum number of thermal steps are increased as they
> >> are derived from the reduction percentage.
> >>
> >> Signed-off-by: Srikar Srimath Tirumala <srikars@...dia.com>
> >> Co-developed-by: Sumit Gupta <sumitg@...dia.com>
> >> Signed-off-by: Sumit Gupta <sumitg@...dia.com>
> >> ---
> >>
> >> Sending this patch separately as the other patch in the series is
> >> applied by Rafael in v6[1]. Revision history before this version is
> >> in the cover letter of v6[1].
> >>
> >> Please review and provide ACK if looks fine.
> >>
> >
> > For arm64 specific changes(a minor nit below though),
> >
> > Acked-by: Sudeep Holla <sudeep.holla@....com>

Applied as 6.8 material, thanks!