Shortest Process First (SPF) scheduling in a multiprocessing system is unrealistic because (select the correct choice): Processes may stop execution before their allowed time expires. Total process execution times are not known in advance. Process I/O requirements are not predictable. Process execution burst durations are not known in advance. Process time slices may end before execution times are completed.
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Compare the completion time for different scheduling algorithms: Round-Robin (RR) and Shortest Remaining Time First (SRTF), with the following setup: 5 processes Time slice is 1 second Process switch time is 0.1 seconds Required CPU time for each process is listed Complete the following table. In your answer, please write in the following format: RR-1: RR-2: RR-3: RR-4: RR-5: SRTF-1: SRTF-2: SRTF-3: SRTF-4: SRTF-5: Completion Time Process CPU RR SRTF 1 50 2 15 3 30 4 45 5 10
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Consider scheduling programs (jobs) on a server farm. Assume that the server farm is homogeneous (that is, a job will take the same amount of time to run regardless of which machine it is run on). Each job will take a given (known) amount of time. We will assign each job to exactly one machine. Each machine, therefore, will have a set of jobs. The time it takes to run all of the jobs on a machine is just the sum of the times it takes to run each job assigned to the machine. The goal is to assign the jobs to minimize the running time of the machine with the longest running time. 1. Describe the state space for this problem. 2. What is its branching factor?
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