Basics of CPU Scheduling

Have you ever wondered how your computer smoothly runs multiple applications at the same time? Understanding CPU scheduling is the key to unlocking how modern operating systems manage execution time and system resources. This text-based course guides you through the core mechanisms that keep computer processors running efficiently. You will start with the absolute essentials, defining processes, threads, and the role of the short-term scheduler. From there, you will explore critical performance metrics like throughput, turnaround time, and response time. You will then dive into classic scheduling algorithms, comparing how they handle workloads in different environments. Finally, you will look at modern scheduling challenges, including multi-core processor management and virtualization overhead. What you will learn: Understand the fundamental states of a process and the role of the CPU dispatcher; Analyze scheduling criteria such as waiting time, response time, and CPU utilization; Evaluate classic algorithms including First-Come First-Served, Shortest Job First, and Round Robin; Calculate scheduling metrics using step-by-step written walkthroughs; Explore modern multi-core scheduling concepts and load balancing basics. The course begins with foundational operating system terminology before moving into step-by-step algorithmic analysis and practical execution scenarios. This course is designed for beginner computer science students, self-taught programmers, and system administrators with no prior OS design experience. Start reading today to master the inner workings of processor management.