Multilevel Queue

Use separate queues for each priority. Processes are then chosen from the highest priority queue.

In a Multilevel Feedback Queue, each queue may use a different scheduling algorithm to order processes within it, and processes may be moved between queues. The implemenation must provide methods to:

• Promote and demote processes between queues.
• Determine the queue for a new process.

Ageing can be implemented by promoting processes through queues.