What are the different CPU scheduling algorithms and how do they compare?

What are the different CPU scheduling algorithms and how do they compare?

There are several CPU scheduling algorithms, including First-Come, First-Served (FCFS), Shortest Job Next (SJN), Round Robin (RR), and Priority Scheduling. Each has its pros and cons depending on the system requirements.

Can you explain how Round Robin scheduling works?

Sure! Round Robin scheduling assigns a fixed time slice to each process in a cyclic order. When a process's time slice expires, it is moved to the back of the queue, allowing other processes to execute.

What are the advantages of using Shortest Job Next?

The main advantage of Shortest Job Next is that it minimizes the average waiting time for processes, making it efficient for batch processing. However, it can lead to starvation for longer processes.

How does Priority Scheduling handle processes?

Priority Scheduling assigns a priority level to each process. The CPU is allocated to the process with the highest priority. If two processes have the same priority, it can use FCFS to decide.

Which algorithm is best for real-time systems?

For real-time systems, Rate Monotonic Scheduling (RMS) is often preferred as it guarantees that high-priority tasks meet their deadlines.