Suppose that the following processes arrive for execution at the times indicated. Each process will run for the amount of time listed. In answering the questions, use nonpreemptive scheduling, and base all decisions on the information you have at the time the decision must be made. Process Arrival Time Burst Time Pl 0.0 8 P2 0.4 4 P3 1.0 1 a. What is the average turnaround time for these processes with the FCFS scheduling algorithm? b. What is the average turnaround time for these processes with the SJF scheduling algorithm? c. The SJF algorithm is supposed to improve performance, but notice that we chose to run process P1 at time 0 because we did not k11ow that two shorter processes would arrive soon. Compute what the average turnaround time will be if the CPU is left idle for the first 1 unit and then SJF scheduling is used. Remember that processes P1 and P2 are waiting during this idle time, so their waiting time may increase. This algorithm could be known as future-knowledge scheduling.
Suppose that the following processes arrive for execution at the times indicated. Each
process will run for the amount of time listed. In answering the questions, use
nonpreemptive scheduling, and base all decisions on the information you have at the time
the decision must be made.
Process Arrival Time Burst Time
Pl 0.0 8
P2 0.4 4
P3 1.0 1
a. What is the average turnaround time for these processes with the FCFS scheduling
b. What is the average turnaround time for these processes with the SJF scheduling
algorithm?
c. The SJF algorithm is supposed to improve performance, but notice that we chose to run
process P1 at time 0 because we did not k11ow that two shorter processes would arrive
soon. Compute what the average turnaround time will be if the CPU is left idle for the first
1 unit and then SJF scheduling is used. Remember that processes P1 and P2 are waiting
during this idle time, so their waiting time may increase. This algorithm could be known
as future-knowledge scheduling.
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