linux-kernel - RE: [PATCH] cpufreq: amd-pstate: Set default governor to schedutil

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Date:   Mon, 12 Jun 2023 02:43:10 +0000
From:   "Yuan, Perry" <Perry.Yuan@....com>
To:     "Huang, Ray" <Ray.Huang@....com>,
        "Limonciello, Mario" <Mario.Limonciello@....com>
CC:     "rafael@...nel.org" <rafael@...nel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Karny, Wyes" <Wyes.Karny@....com>,
        "Shenoy, Gautham Ranjal" <gautham.shenoy@....com>,
        "Li, Sun peng (Leo)" <Sunpeng.Li@....com>,
        "Yuan, Perry" <Perry.Yuan@....com>,
        "Huang, Shimmer" <Shimmer.Huang@....com>,
        "Meng, Li (Jassmine)" <Li.Meng@....com>
Subject: RE: [PATCH] cpufreq: amd-pstate: Set default governor to schedutil

[AMD Official Use Only - General]

> -----Original Message-----
> From: Huang, Ray <Ray.Huang@....com>
> Sent: Saturday, June 10, 2023 6:55 PM
> To: Limonciello, Mario <Mario.Limonciello@....com>
> Cc: rafael@...nel.org; linux-pm@...r.kernel.org; linux-
> kernel@...r.kernel.org; Yuan, Perry <Perry.Yuan@....com>; Karny, Wyes
> <Wyes.Karny@....com>; Shenoy, Gautham Ranjal
> <gautham.shenoy@....com>; Li, Sun peng (Leo) <Sunpeng.Li@....com>
> Subject: Re: [PATCH] cpufreq: amd-pstate: Set default governor to schedutil
>
> On Thu, Jun 08, 2023 at 05:53:58PM +0800, Limonciello, Mario wrote:
> > The Kconfig currently defaults the governor to schedutil on x86_64
> > only when intel-pstate and SMP have been selected.
> >
> > If the kernel is built only with amd-pstate, the default governor
> > should also be schedutil.
> >
> > Cc: Sun Peng (Leo) Li <sunpeng.li@....com>
> > Signed-off-by: Mario Limonciello <mario.limonciello@....com>
>
> Acked-by: Huang Rui <ray.huang@....com>
>
> > ---
> >  drivers/cpufreq/Kconfig | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index
> > 2c839bd2b051..a1c51abddbc5 100644
> > --- a/drivers/cpufreq/Kconfig
> > +++ b/drivers/cpufreq/Kconfig
> > @@ -38,7 +38,7 @@ choice
> >     prompt "Default CPUFreq governor"
> >     default CPU_FREQ_DEFAULT_GOV_USERSPACE if
> ARM_SA1110_CPUFREQ
> >     default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if ARM64 || ARM
> > -   default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if X86_INTEL_PSTATE
> && SMP
> > +   default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if
> (X86_INTEL_PSTATE ||
> > +X86_AMD_PSTATE) && SMP
> >     default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
> >     help
> >       This option sets which CPUFreq governor shall be loaded at
> > --
> > 2.34.1
> >


Tested-by: Perry Yuan <Perry.Yuan@....com>

Regards.
Perry Yuan