The article explains how the Linux kernel decides the CPU for a newly woken task, detailing the roles of wake_affine and select_idle_sibling, the influence of cache topology, run‑queue load, and various idle‑checking heuristics, with concrete examples and code snippets.
This article introduces the core Linux kernel data structures involved in process management and scheduling—task_struct, sched_entity, rq, and sched_avg—explaining their key fields, relationships, and how they enable the kernel to track process state, timing, memory, and load‑balancing decisions.
Learn how Linux selects the next process for CPU execution by exploring key scheduler structures such as task_struct, sched_class, runqueue, the various scheduling policies (CFS, RT, Deadline, etc.), the scheduling flow, and the low‑level context_switch mechanism that swaps address spaces and registers.
This article explains Linux scheduling fundamentals, describing the task_struct fields, scheduling classes, runqueue organization, the scheduling workflow including flag setting and execution, and the details of the context_switch function that performs address‑space and register state switches.
