Question

Given the following set of processes with the specified length of CPU
burst and arrival time, compute the turnaround time for P1 thru P4 using
Round-Robin scheduling with a time quantum of 15. Show the final Gantt chart.

Process CPU Burst time Arrival time

P1 30 10
P2 20 17
P3 15 21
P4 10 27

Answer 1

The final Gantt. chart is shown in the figure above.

Completion time = Time at which process completes execution.

Turnaround Time =Completion Time - Arrival Time

Using the final gantt. chart and definition of Turnaround Time, we generate the following table :

Process CPU Burst time Arrival time Completion time Turnaround Time

P1 30 10 80 70

P2 20 17 85 68

P3 15 21 55 34

P4 10 27 65 38