What are the different CPU scheduling algorithms and their performance?

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

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 own performance metrics like turnaround time, waiting time, and CPU utilization.

Can you explain how Round Robin scheduling works?

Round Robin scheduling assigns a fixed time slice to each process in the queue. 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?

Shortest Job Next 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 process execution?

In priority scheduling, each process is assigned a priority level. The CPU is allocated to the process with the highest priority. If two processes have the same priority, FCFS can be used to determine execution order.

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.