Re: Fedora 32 Self-Contained Change proposal: Better Thermal Management for the Workstation

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On Mon, Sep 23, 2019 at 2:21 PM Ben Cotton <bcotton@xxxxxxxxxx> wrote:
>
> https://fedoraproject.org/wiki/Changes/ThermalManagementWS
>
> == Summary ==
> Better thermal management and peak performance on Intel CPUs by
> including thermald in the default install.
>
> == Owner ==
> * Name: [[User:benzea| Benjamin Berg]]
> * Email: bberg@xxxxxxxxxx
>
> * Name: [[User:ckellner| Christian J. Kellner]]
> * Email: ckellner@xxxxxxxxxx
> * Product: Workstation
> * Responsible WG: Workstation
>
> == Detailed Description ==
>
> Modern Intel-based systems provide sensors and methods to monitor and
> control temperature of its CPUs. The Thermal daemon will use those
> sensors to monitor the temperature and use the best available method
> to keep the CPU in the right temperature envelop. On certain systems
> this is needed to reach the maximal performance. For optimal
> performance a per-model thermald configuration should be created, this
> can either be done by using dptfxtract (available from rpmfusion) or
> we could ship static configuration files for a set of known models.
>
> For a more details explanation please consult Intel's
> [https://01.org/linux-thermal-daemon/documentation/introduction-thermal-daemon
> introduction] to thermald.
>
> == Benefit to Fedora ==
>
> Better out-of-the-box experience due to improved cooling methods and
> performance on Intel systems.
>
> == Scope ==
> * Proposal owners:
>  - Include the thermald package in the default Workstation install
>  - Optionally provide patches for thermald to be able to read hardware
> specific configuration data

To me this looks like a wrong order of operations:

- Upstream patches to read hardware-specific configuration data
- Include the thermald package in the default Workstation install

Or maybe there could be a wrapper script that does the detection and
generates a configuration accordingly? Carrying downstream patches
without an explicit plan about upstreaming them sounds contrary to
our usual upstream-first principle.

>  - Optionally collect hardware specific configuration data and ship it

I don't understand the second optional item.


> * Other developers: N/A (not a System Wide Change)
> * Release engineering:
> * Policies and guidelines: N/A (not a System Wide Change)
> * Trademark approval: N/A (not needed for this Change)
>
> == Upgrade/compatibility impact ==
> N/A (not a System Wide Change)
>
> == How To Test ==
>
> Install the packages and use e.g. turbostat to monitor the
> performance. Improvements may only be visible if the non-free
> dptfxtract package is also installed.
>
> == User Experience ==
>  - Better performance on certain hardware
>  - Better cooling of CPUs on certain hardware
>
> --
> Ben Cotton
> He / Him / His
> Fedora Program Manager
> Red Hat
> TZ=America/Indiana/Indianapolis
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