DELL In your own words, write a short paragraph for each of the following questions from the assigned readings Question 1 2.1. Suppose we have a multiprogrammed computer in which each job has identical characteristics in one computation period for a job, hall the time is spent in 10, and the other halt in processor activity. Each job runs for a total of N periods. Assume a simple round-robin scheduling is used, and I/O operations can overlap with processor operation Define the following quantities . Turnaround time actualtima actual time to complete a job . Throughputaverage Throughputaverage number of jobs completed per time period T Processor zon percentageutilization percentage of time that the processor is active (not waiting) Compute these quantities for one, two, and four simultaneous jobs, assuming that the period Tis distributed in each of the following ways . O first hall, processor second half O first and fourth quarters, processor second and third quarter Question 2 2.6. A multiprocessor with eight processors has 20 attached tape drives. There is a large number of jobs submitted to the system that each require a maximum of four tape arives to complete executon Assume cach job starts running with only three tape drive for a long period before requiring the fourth tape drive for a short period toward the end of its operation. Also, assume an endless supply of such jobs Assume the scheduler in the OS will not start a job unless there are four tape drives available. When a job is started, four drives are assigned immediately and are not released until the job finishes. What is the maximum number of jobs that can be in progress at once? What are the maximum and minimum number of tape drives that may be lette as a result of this policy? Suggest an alternative policy to improve tape drive utilization and at the same time avoid system deadlock. What is the maximum number of jobs that can be in progress at once? What are the bounds on the number oficing tape drives? Assignment Requirements DELL In your own words, write a short paragraph for each of the following questions from the assigned readings Question 1 2.1. Suppose we have a multiprogrammed computer in which each job has identical characteristics in one computation period for a job, hall the time is spent in 10, and the other halt in processor activity. Each job runs for a total of N periods. Assume a simple round-robin scheduling is used, and I/O operations can overlap with processor operation Define the following quantities . Turnaround time actualtima actual time to complete a job . Throughputaverage Throughputaverage number of jobs completed per time period T Processor zon percentageutilization percentage of time that the processor is active (not waiting) Compute these quantities for one, two, and four simultaneous jobs, assuming that the period Tis distributed in each of the following ways . O first hall, processor second half O first and fourth quarters, processor second and third quarter Question 2 2.6. A multiprocessor with eight processors has 20 attached tape drives. There is a large number of jobs submitted to the system that each require a maximum of four tape arives to complete executon Assume cach job starts running with only three tape drive for a long period before requiring the fourth tape drive for a short period toward the end of its operation. Also, assume an endless supply of such jobs Assume the scheduler in the OS will not start a job unless there are four tape drives available. When a job is started, four drives are assigned immediately and are not released until the job finishes. What is the maximum number of jobs that can be in progress at once? What are the maximum and minimum number of tape drives that may be lette as a result of this policy? Suggest an alternative policy to improve tape drive utilization and at the same time avoid system deadlock. What is the maximum number of jobs that can be in progress at once? What are the bounds on the number oficing tape drives? Assignment Requirements