performance domain

OPPO Kernel Craftsman

Dec 17, 2021 · Fundamentals

In‑Depth Analysis of Linux CFS Task Placement and Energy Model (Part 2)

The article delves into Linux 5.10.61’s CFS task placement code, explaining the Energy‑Model framework, key data structures, and energy calculations, then walks through select_task_rq_fair’s wake‑up, fork, and exec paths, detailing EAS CPU selection, wake‑affine logic, fast and slow CPU‑selection algorithms, and how they balance performance with power on heterogeneous mobile platforms.