Shortest Job First Algorithm C Program

By | September 5, 2016

C Program To Implement Shortest Job First Algorithm

Learn How To Implement Shortest Job First Algorithm in C Programming Language. The SJF Scheduling Algorithm is a Disk Scheduling Algorithm for processes that are needed to be executed. The SJF Algorithm is normally represented using Gantt’s Chart on paper. This algorithm is also known as Shortest Remaining Time First Algorithm.

The SJF Scheduling Program in C Language is normally implement in Operating Systems to schedule multiple process entering the CPU for execution. This code is for SJF Non – Preemptive Algorithm in C Programming.


What is Shortest Job First Algorithm?

This Shortest Job First Algorithm will overcome the shortcomings of the FCFS Algorithm. In this algorithm, at any point of time, the processes are compared with each other and the process having the shortest burst time or execution time will get executed first. This algorithm thereby increases the response time of processes. However, the overall performance of the system will increase compared to FCFS.

This is a Non – Preemptive Algorithm which means unless the process completely gets executed, no other process can be executed simultaneously. The CPU will, therefore, not leave the current process in execution and go to another process to execute it. However, you can modify the program for a preemptive algorithm as well.

The only disadvantage with the SJF Non-Preemptive Scheduling Program is that we must know the Burst Time of every process in advance which is not possible in the real world scenario. The SJF CPU Scheduling Algorithm is also known as Shortest Job Next and Shortest Process Next.

Shortest Job First CPU Scheduling Algorithm C Program using Non-Preemptive Algorithm


Output

Shortest Job First Algorithm in C Programming with Preemptive Scheduling Program in OS

If you have any compilation errors or doubts in this C Program to Implement Shortest Job First Algorithm, let us know about in the Comment Section below. Find more about this on Wikipedia.

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10 thoughts on “Shortest Job First Algorithm C Program

  1. Anil Tandan

    Does the same code work in Windows 7 platform too? I am not using Linux ubuntu actually!

    Reply
  2. Ajay Kadam

    This is the best working code that I found for SJF Algorithm. Thank you so much CodingAlpha

    Reply
  3. Vedant Mishra

    I think a Preemptive SJF Algorithm will be more efficient than a Non Preemptive Algorithm. It will help to increase the overall performance of the CPU.

    Reply
  4. Vikas Mishra

    This SJF Scheduling Algorithm in Operating System C Program is really easy to understand. Thanks for this one.

    Reply
  5. Anonymous

    can you provide non preemptive shortest job first with arrival time in c?

    Reply

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