This article explains the fundamentals of CPU context switching, covering the hardware and kernel mechanisms, step‑by‑step saving and restoring of registers, scheduling algorithms, different types of switches, performance costs, optimization techniques, and includes a complete C++ simulation example.
This article explains the Linux Completely Fair Scheduler (CFS), covering its design goals, core concepts such as virtual runtime, weight, red‑black tree management, load‑balancing mechanisms, scheduling policies, and answers common questions about its operation and kernel code.
The article traces the development of operating‑system process scheduling—from the naïve first‑come‑first‑served approach, through cooperative multitasking with a yield() system call, to timer‑driven preemptive round‑robin and priority schemes—highlighting each method’s strengths and shortcomings.
This article explains the concept of a stack as a LIFO data structure, its hardware implementation in CPUs, how it supports function calls and multitasking, and details the four types of stacks used in Linux—including process, thread, kernel, and interrupt stacks—along with code examples and diagrams.
Researchers from Stanford and Microsoft analyzed logs and surveys of 715 U.S. Microsoft employees during remote meetings, revealing that longer, larger meetings increase multitasking—such as emailing and document editing—by up to sixfold, negatively impacting focus, health, and meeting effectiveness, and they propose practical guidelines to curb this behavior.
The article explains how constant task switching—called "bad multitasking"—drains cognitive resources, creates attention residue and cognitive load, and ultimately reduces work efficiency, while offering practical strategies such as meditation, focused questioning, white‑noise, task batching, and distraction‑free environments to improve productivity.
