Waiting Time(WT): Time Difference between turn around time and burst time. This algorithm is designed to overcome the shortcomings of the FCFS algorithm. Turn Around Time = Completion Time â Arrival Time The shortest job first scheduling algorithm is a very popular job scheduling algorithm in operating systems. Turn Around Time(TAT): Time Difference between completion time and arrival time. C program to implement Shortest Job First (SJF) Algorithm / include includeThis algorithm can be preemptive or non-preemptive. one which arrives first, will be taken up first by the CPU. FCFS scheduling may cause the problem of starvation if the burst time of the first process is the longest among all the jobs.Ĭompletion Time: Time at which process completes its execution. If the two processes having the same length, next CPU burst, FCFS scheduling is used i.e. The lesser the arrival time of the job, the sooner will the job get the CPU. The job which comes first in the ready queue will get the CPU first. ![]() First Come First Serve (FCFS) Schedulingįirst come first serve (FCFS) scheduling algorithm simply schedules the jobs according to their arrival time. ![]() There are four types of process scheduling algorithms:
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