[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 #2 from Bagas Sanjaya (bagasdotme@gmail.com) ---
On Wed, Sep 20, 2023 at 11:06:51AM +0000, bugzilla-daemon@kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=217931
> 
>             Bug ID: 217931
>            Summary: amd-pstate lacks crucial features: CPU frequency and
>                     boost control
>            Product: Power Management
>            Version: 2.5
>           Hardware: AMD
>                 OS: Linux
>             Status: NEW
>           Severity: high
>           Priority: P3
>          Component: cpufreq
>           Assignee: linux-pm@vger.kernel.org
>           Reporter: aros@gmx.com
>         Regression: No
> 
> Created attachment 305131
>   --> https://bugzilla.kernel.org/attachment.cgi?id=305131&action=edit
> Power Options: Processor Power Management in Windows
> 
> It would be really great if amd-pstate had a feature parity with
> acpi-cpufreq,
> namely
> 
> 1) Being able to set operating frequencies (maximum, minimum and
> user-defined)

ondemand, conservative, performance?

> 
> 2) Being able to enable/disable boost

What is boost?

> 
> Currently both features are not available and frequency control is simply
> ignored (bug 215800).
> 
> Rationale:
> 
> 1) This is required for benchmarking and proper temperature control. Boost
> frequencies are subject to multiple limitations (power in watts, amperage,
> voltage, temperature, BIOS limitations) and can change depending on the
> workload. Setting a low enough frequency allows to run benchmarks in the
> controlled environment and get proper data.
> 
> Windows allows to do that easily, see the attached screenshot.
> 
> 2) Disabling boost is an easy option to subdue operating temperatures though
> if
> the previous issue is tackled, it's not really needed.

For example, after compiling the kernel one needs to cool down system,
right?

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