![]() Here’s the Gantt chart for the above example: Processes in Q3 are executed in a First-Come-First-Serve (FCFS) manner until completion. If a process completes its execution in Q2, it is removed from the system. ![]() If it doesn’t finish its execution within this quantum, it is moved to the next lower priority queue (Q3). If a process completes its execution in Q1, it is removed from the system.Įach process in Q2 is given a time quantum of 8. If it doesn’t finish its execution within this quantum, it is moved to the next lower priority queue (Q2). Initially, all processes are placed in the highest priority queue (Q1).Įach process is given a time quantum of 4 in Q1. The Multilevel Feedback Queue Scheduling algorithm works as follows: Let’s consider the following processes with their arrival times, burst times, and priorities: Each queue has a time quantum of 4, 8, and 16 respectively. Suppose we have three queues: Q1, Q2, and Q3, with Q1 being the highest priority queue and Q3 being the lowest priority queue. Here, we will show you an example of Multilevel Feedback Queue Scheduling with a Gantt chart: Also Read: Process Life Cycle in Operating System | Process State in OS Multilevel Feedback Queue Scheduling Example with Gantt Chart By using multiple queues with different priorities, the system can efficiently allocate resources to processes based on their requirements and ensure that resources are not wasted. Resource Utilization: Multilevel feedback queue scheduling can improve resource utilization. By allowing processes to move between queues, the system can prevent processes from monopolizing resources and ensure that all processes have a fair chance of accessing the CPU. ![]() By giving higher priority to interactive processes, the system can respond quickly to user input and provide a better user experience.įairness: Multilevel feedback queue scheduling can ensure fairness in resource allocation. Response Time: Multilevel feedback queue scheduling can improve the response time of interactive processes. Processes that require more resources or have higher priority can be placed in a higher-priority queue, while lower-priority processes can be placed in lower-priority queues. Prioritization: Multilevel feedback queue scheduling allows for the prioritization of different types of processes. There are several reasons why multilevel feedback queue scheduling is needed: Also Read: Priority Scheduling Algorithm in OS with Examples & Programs!! Multilevel feedback queue scheduling uses multiple queues with different priorities and allows processes to move between the queues based on their behavior and resource requirements. Why to Need for Multilevel Feedback Queue Scheduling?
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