{"id":9065,"date":"2022-07-12T09:25:25","date_gmt":"2022-07-12T09:25:25","guid":{"rendered":"https:\/\/www.prepbytes.com\/blog\/?p=9065"},"modified":"2022-08-30T03:02:39","modified_gmt":"2022-08-30T03:02:39","slug":"multilevel-feedback-queue-scheduling-mlfq-cpu-scheduling","status":"publish","type":"post","link":"https:\/\/prepbytes.com\/blog\/multilevel-feedback-queue-scheduling-mlfq-cpu-scheduling\/","title":{"rendered":"Multilevel Feedback Queue Scheduling MLFQ CPU Scheduling"},"content":{"rendered":"

\"\"<\/p>\n

What is Multilevel Queue Scheduling?<\/h3>\n

In multilevel queue scheduling, all the processes are assigned permanently to the queue at the time of entry. Processes will not move between queues and it may happen that the processes in the queue can be divided into different classes where classes have their own scheduling. For example, interactive process and batch process.<\/p>\n

The main advantage of multilevel queue scheduling is that the processes are permanently assigned to the queue.<\/p>\n

For example let\u2019s take three different processes:<\/p>\n

    \n
  1. System process<\/li>\n
  2. Interactive process<\/li>\n
  3. Batch process<\/li>\n<\/ol>\n

    \"\"<\/p>\n

      \n
    1. In system processes the cpu itself has their own process to run which is called system process.<\/li>\n
    2. In an interactive process there should be the same type of interaction.<\/li>\n
    3. Batch processing is a technique of the operating system<\/a> which collects the programs and data in the form of a batch before the starting of the process.<\/li>\n<\/ol>\n

      Multilevel Feedback Queue scheduling:<\/h3>\n

      In multilevel feedback scheduling, the processes are allowed to move in between the queues, the idea behind is to separate the processes with different CPU – burst characteristics.
      \nIf any process uses too much CPU then it\u2019ll be moved to the lower priority queue and if a process waiting too much for the CPU is moved to the high priority queue this prevents starvation.
      \nMultilevel feedback queue is the most general scheme and also the most complex.<\/p>\n

      \"\"<\/p>\n

      Advantages of MLFQ:<\/h3>\n