Introduction to Threads and Concurrency in Operating Systems

Ever wondered how your computer seamlessly runs multiple applications at once, or how a single program handles background tasks without freezing? Understanding how operating systems manage threads is the key to unlocking true software performance and mastering system-level programming. This text-based course guides you from the absolute basics of processes and threads to the core concepts of concurrent execution. You will build a solid mental model of how operating systems schedule work, manage shared memory, and utilize multi-core processors. By reading through practical scenarios and analyzing conceptual code patterns, you will learn to spot concurrency issues before they happen. What you'll learn: - Understand the fundamental differences between processes and threads in modern operating systems - Explore thread scheduling algorithms and how CPUs allocate execution time - Analyze synchronization mechanisms including mutexes, semaphores, and locks - Identify common concurrency pitfalls such as deadlocks, race conditions, and thread starvation - Compare OS-level threads with user-space green threads and modern async/await models - Practice designing thread-safe logic through written code walkthroughs and conceptual exercises The journey begins with foundational terminology, establishing the exact relationship between the CPU, the operating system, and running programs. From there, you will progress to thread synchronization, memory sharing, and modern concurrency patterns used in high-performance software today. This course is designed for beginner programmers, computer science students, and self-taught developers who want to understand what happens under the hood of their code. No prior systems programming experience is required. Start reading today to master the core principles of multi-threaded execution and system performance.