Bug#1028344: linux: Enable Intel Speed Select Technology

[Salvatore Bonaccorso <carnil@debian.org>]

Control: tags -1 + moreinfo

Hi Miguel,

I have a question back on your request:

On Mon, Jan 09, 2023 at 12:29:31PM -0600, Miguel Bernal Marin wrote:
> Source: linux
> Severity: wishlist
> Tags: sid
> X-Debbugs-Cc: miguel.bernal.marin@linux.intel.com, jair.de.jesus.gonzalez.plascencia@intel.com
> 
> Dear Maintainer,
> 
> Intel is planing to release the next-generation Xeon products [1] and some
> of the features are not enabled on Debian. It would be useful to have this
> feature in Bookworm.
> 
> # Intel(R) Speed Select Technology
> 
>   CONFIG_INTEL_SPEED_SELECT_INTERFACE=m
> 
>   The Intel(R) Speed Select Technology (Intel(R) SST) provides a powerful
>   new collection of features that give more granular control over CPU
>   performance. With Intel(R) SST, one server can be configured for power
>   and performance for a variety of diverse workload requirements.
> 
>   Refer to the links below for an overview of the technology:
> 
>   * https://www.intel.com/content/www/us/en/architecture-and-technology/speed-select-technology-article.html
>   * https://builders.intel.com/docs/networkbuilders/intel-speed-select-technology-base-frequency-enhancing-performance.pdf
> 
>   These capabilities are further enhanced in some of the newer generations
>   of server platforms where these features can be enumerated and controlled
>   dynamically without pre-configuring via BIOS setup options. This dynamic
>   configuration is done via mailbox commands to the hardware. One way to
>   enumerate and configure these features is by using the Intel Speed Select
>   utility.
> 
> [1] https://www.intel.com/content/www/us/en/newsroom/news/intel-technology-roadmaps-milestones.html

As we do not build those intel-speed-select too, does it still make
sense to enable it, are there other ways to control the features? Or
does it only make sense if we would build intel-speed-select as well?

Regards,
Salvatore