Re: [PATCH v3] sched_ext: Introduce LLC awareness to the default idle selection policy

[Tejun Heo]

On Wed, Oct 23, 2024 at 01:47:18AM +0200, Andrea Righi wrote:
> Rely on the scheduler topology information to implement basic LLC
> awareness in the sched_ext build-in idle selection policy.
> 
> This allows schedulers using the built-in policy to make more informed
> decisions when selecting an idle CPU in systems with multiple LLCs, such
> as NUMA systems or chiplet-based architectures, and it helps keep tasks
> within the same LLC domain, thereby improving cache locality.
> 
> For efficiency, LLC awareness is applied only to tasks that can run on
> all the CPUs in the system for now. If a task's affinity is modified
> from user space, it's the responsibility of user space to choose the
> appropriate optimized scheduling domain.
> 
> Signed-off-by: Andrea Righi <arighi@xxxxxxxxxx>

Applied to sched_ext/for-6.13.

Thanks.

-- 
tejun