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CPU scheduling simulation

Create 10 processes of random execution time with lengths uniformly distributed between 2 and 4 minutes (use the uniform distribution method for random number generation).

• For each process, the times between I/O requests (i.e, CPU bursts) are distributed exponentially. The mean inter-I/O intervals for the processes are respectively 30ms, 35ms, 40ms, 45ms, 50ms, 55ms, 60ms, 65ms, 70ms, and 75ms.

• Each time an I/O is needed it takes precisely 60 ms.

• A process, once it enters the system and before it exits it, can be either in the Ready Queue, or the I/O queue. (It is convenient to consider the process at the front of the Ready Queue to be serviced by the CPU, and the process at the front in the I/O Queue to be serviced by the channel that deals with all I/O devices; however, care should be taken to count the time of the process being serviced separately from waiting time.) Correspondingly, your data objects will be the Process Control Block, the Ready Queue, and the I/O Queue along with the event object.

The task is to write the simulation of the system behaviour for the whole period of the execution, while computing and collecting the following statistics: CPU utilization, throughput (i.e., the average number of processes completed in a unit of time), turnaround time (i.e., the average time it took to execute a process), and average waiting time.

a) Different simulation runs are to be performed with the First-Come-First-Serve and Shortest-Job-First (SJF) algorithms. For simplicity, use the actual burst times that you have generated rather than predict them with exponential averaging.

b) Think about the conditions under which average waiting time increases with the decreasing quantum in Round Robin and under what conditions it decreases with the decreasing quantum. Write a statement describing these conditions. (Note: There is no need to use a quantum that is larger than the maximum CPU burst [computed on the set of all the processes] since in this case RR reduces to FCFS.)

c) Design experiments to test your statements in Part b). In the first experiment, the processes will satisfy the conditions you listed and will cause the average waiting time to increase with decreasing quantum. In the second experiment, the processes will satisfy the condition you listed that will cause the average waiting time to decrease with decreasing quantum. Each experiment should have about 5 runs, which differ only in the respective value of the quantum. Design some experiments with the following characteristics:

o At least 10 processes are used, each having many CPU bursts.

o the largest and smallest CPU burst averages differ by a factor of at least 2.

o The CPU utilization is between 50 and 90 percent.

Beceriler: Java, Simulation

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oleksandryakoven

Hi, hope you are doing well. Do you need c/c++ Developer who do the Scheduling project? I have gone through your description I am a c/c++ developer with 7 years of experience. I am sure that I can make it as per your Daha Fazla

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networkdesign17

I already built such software I am using it on Cloud for the peoples who want it I can provide it as AMI Thank you

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swapnilhk

I have done Masters in computer science. I am aware of OS concepts like process states and scheduling. I have 9 years experience in Java. Following is my GitHub page [login to view URL] And you might find tha Daha Fazla

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