4.8 Priority Scheduling Algorithm | Preemptive vs Non-Preemptive

4.8 Priority Scheduling Algorithm | Preemptive vs Non-Preemptive Priority scheduling is an important concept in operating system scheduling where each process is assigned a priority, and the CPU always selects the highest priority task for execution. Unlike other CPU scheduling algorithms like FCFS or SJF, this method focuses on the importance of processes rather than arrival time or burst time. This makes priority scheduling in OS especially useful for handling critical system tasks such as interrupts or user inputs, ensuring better responsiveness and smarter resource allocation. There are two main types of priority scheduling: preemptive vs non preemptive scheduling. In non-preemptive scheduling, once a process starts execution, it continues until completion, even if a higher priority process arrives. In contrast, preemptive scheduling allows the CPU to interrupt the current process and immediately switch to a higher priority one using context switching. While preemptive scheduling improves responsiveness in real-time systems, it also introduces additional overhead due to frequent process switching. However, priority scheduling can lead to issues like starvation, where low-priority processes may never get CPU time. To solve this, operating systems use aging, which gradually increases a process’s priority the longer it waits. Modern systems often implement dynamic priority scheduling instead of static approaches, allowing priorities to change based on system conditions. Overall, understanding priority scheduling algorithm and its variations is essential for mastering operating system concepts and comparing it with other techniques like Round Robin and SJF. For Private Coaching Contact Us On WhatsApp: +91 9892614730 Website: https://www.shreelearningacademy.com Mail: [email protected] LinkedIn: https://www.linkedin.com/company/shree-learning-academy/ Instagram : https://www.instagram.com/shreelearningacademy/ Twitter: https://twitter.com/ShreeLearning Facebook: https://fb.me/shreelearningacademy #OperatingSystem #OSTutorial #TechnologyExplained #ComputerScience #OSConcepts #TechEducation