Multilevel Queue Scheduling

In this topic, you will learn about, Multilevel Queue Scheduling.

This type of scheduling algorithm has been created for situations in which processes are easily classified into different groups. For e.g., One process may work in the foreground and another work in the background. These two types of processes have different response time requirements and so might have different scheduling needs.

A multilevel queue scheduling algorithm partition’s a ready queue into several separate queues. The process is permanently assigned to one queue, based on some property of the process such as memory size, process priority, or process type. Each queue has its own scheduling algorithm such as the foreground queue can use the RR algorithm while the background queue is scheduled by an FCFS algorithm.

There must be scheduled between the Queues which is commonly implemented as fixed-priority primitive scheduling.

Multilevel queue scheduling can be illustrated by the following example:

multilevel queue scheduling algorithm
the multilevel queue scheduling algorithm

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See also  Memory Management in Multi Programming