Re: [PATCH v2 00/13] Add support for AMD hardware feedback interface

[Mario Limonciello <mario.limonciello@amd.com>]

On 10/10/2024 19:54, Bagas Sanjaya wrote:
> On Thu, Oct 10, 2024 at 02:36:52PM -0500, Mario Limonciello wrote:
>> The AMD Heterogeneous core design and Hardware Feedback Interface (HFI)
>> provide behavioral classification and a dynamically updated ranking table
>> for the scheduler to use when choosing cores for tasks.
>>
>> Threads are classified during runtime into enumerated classes.
>> Currently, the driver supports 3 classes (0 through 2). These classes
>> represent thread performance/power characteristics that may benefit from
>> special scheduling behaviors. The real-time thread classification is
>> consumed by the operating system and is used to inform the scheduler of
>> where the thread should be placed for optimal performance or energy efficiency.
>>
>> The thread classification helps to select CPU from a ranking table that describes
>> an efficiency and performance ranking for each classification from two dimensions.
>>
>> The ranking data provided by the ranking table are numbers ranging from 0 to 255,
>> where a higher performance value indicates higher performance capability and a higher
>> efficiency value indicates greater efficiency. All the CPU cores are ranked into
>> different class IDs. Within each class ranking, the cores may have different ranking
>> values. Therefore, picking from each classification ID will later allow the scheduler
>> to select the best core while threads are classified into the specified workload class.
>>
>> This series was originally submitted by Perry Yuan [1] but he is now doing a different
>> role and he asked me to take over.
> 
> Sorry but can you specify the base commit/tree of this series? I can't apply
> it on top of current platform-drivers-x86.git, though.
> 
> Confused...
> 

Sorry about that.  As it crosses a few subsystems it will require some 
coordination to properly land once it has review comments.

It's (currently) based off:
https://git.kernel.org/pub/scm/linux/kernel/git/superm1/linux.git/log/?h=linux-next

commit 57533bc760ae ("cpufreq/amd-pstate: Fix non kerneldoc comment")