What is the turnaround time of each process for each of the scheduling algorithms in part (a).

1 year ago
Operating System

The Gantt-chart for FCFS scheduling is

P1    P2    P3    P4    P5
0    1    2    4    5
10
Turnaround time = Finished Time – Arrival Time Turnaround time for process P1 = 1 – 0 = 1 Turnaround time for process P2 = 2 – 0 = 2 Turnaround time for process P3 = 4 – 0 = 4 Turnaround time for process P4 = 5 – 0 = 5 Turnaround time for process P5 = 10 – 0 = 10 Average Turnaround time = (1+2+4+5+10)/5 = 4.4 The Gantt-chart for SJF scheduling is
P1    P2    P4    P3    P5
0    1    2    3    5
10
Turnaround time for process P1 = 1 – 0 = 1 Turnaround time for process P2 = 2 – 0 = 2 Turnaround time for process P3 = 5 – 0 = 5 Turnaround time for process P4 = 3 – 0 = 3 Turnaround time for process P5 = 10 – 0 = 10

Average Turnaround time = (1+2+5+3+10)/5 = 4.2 The Gantt-chart for Priority scheduling is
P1    P2    P5    P3    P4
0    1    2    7
9    10
Turnaround time for process P1 = 1 – 0 = 1 Turnaround time for process P2 = 2 – 0 = 2 Turnaround time for process P3 = 9 – 0 = 9 Turnaround time for process P4 = 10 – 0 = 10 Turnaround time for process P5 = 7 – 0 = 7 Average Turnaround time = (1+2+9+10+7)/5 = 5.8 The Gantt-chart for RR scheduling is
P1    P2    P3    P4    P5    P3    P5
0    1    2    3    4    5    6
10
Turnaround time for process P1 = 1 – 0 = 1 Turnaround time for process P2 = 2 – 0 = 2 Turnaround time for process P3 = 6 – 0 = 6 Turnaround time for process P4 = 4 – 0 = 4 Turnaround time for process P5 = 10 – 0 = 10 Average Turnaround time = (1+2+6+4+10)/5 = 4.8

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