On Thu, Oct 10, 2024 at 08:29:47PM -0500, Mario Limonciello wrote: > 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") Series successfully applied for review, thanks! -- An old man doll... just what I always wanted! - Clara
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