Waiting Time(WT): Time Difference between turn around time and burst time.

Turn Around Time = Completion Time – Arrival Time Turn Around Time(TAT): Time Difference between completion time and arrival time.

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. Once a process is executed for a given time period, it is preempted and other process executes for a given time period. The fixed time is called the time quantum or time slot or time stamp or time slice.

Each process is provided a fix time to execute in cyclic way. printf(Enter time slice for os algorithm in c).

The lesser the arrival time of the job, the sooner will the job get the CPU. Round Robin scheduling is the preemptive process scheduling algorithm. The key idea is to allocate CPU to all processes in the same order for the same amount of time. Step 2: Now, we push the first process from the ready queue to execute its task for a fixed time, allocated by each process. Round Robin Scheduling Algorithm is one of the simplest scheduling algorithm used in various operating systems for process scheduling and networks. The queue structure of the ready queue is based on the FIFO structure to execute all CPU processes. The job which comes first in the ready queue will get the CPU first. Step 1: Organize all processes according to their arrival time in the ready queue.

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:

C programming round robin scheduling