High performance from laptops with heterogeneous cores

[alice-sowerby]

User Story

As a laptop user, I want to get the maximum performance from my laptop if it has heterogenous cores, so it's not slower than it should.

Implementation Notes

There are some issues in the scheduler backlog that need to be resolved before work can start on this.

Acceptance Criteria

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[OlCe2]

First step for this project is to devise simple strategies to have processes execute on the Performance cores in priority or, conversely, on Efficiency ones when the policy is to conserve battery as much as possible. Further steps would be to refine policy implementations by taking into account system load and the actual use of CPU features by processes. It may be possible (perhaps even desirable) to couple these with strategies to save power (see #6).

Only the first step seems in scope for Q1-2025, and actual coding work is still pending depletion of some parts of my scheduler backlog, which I hope to complete before beginning of February.