Answered: How does the Multi-level Feedback Queue…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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How does the Multi-level Feedback Queue scheduler ensure that interactive jobs are running quickly? (You should think about how MLFQ distinguishes between interactive and non-interactive jobs to answer this one.)

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Step 1

INTRODUCTION:

This scheduling is similar to Multilevel Queue(MLQ) scheduling, except that you can move between queues in this procedure.
MLFQ (Multilevel Feedback Queue Scheduling) continuously analyses the behavior or time of execution of processes and adjusts its priority accordingly.
Take a look at the graphic and explanation below to make sure you understand everything.
Due to certain brief processes consuming all of the CPU time, a process in the lower priority queue may suffer from hunger.
An easy option is to raise the priority of all processes at regular intervals and move them all to the front of the priority queue.
It's more adaptable.

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