1 a Draw the Gantt chart and calculate the waiting and turnaround times for each process using a FCFS scheduling algorithm b Draw the Gantt chart and calculate the waiting and turnaround times for each process using a SJD scheduling algorithm c The SIF algorithm is supposed to improve performance, but notice that we usually choose to run process P1 at when it arrived because we did not know that two shorter processes would arrive soon Computer what the waiting and turnaround times will be if the CPU left 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 called future knowledge scheduling 1 Assume that a system has following processes and their arrival and burst times Process Arrival Time Burst Time P1 P2 P3 12 4 4 7 a) b) a) Draw the Gantt chart and calculate the waiting and turnaround times for each process using a FCFS scheduling algorithm Draw the Gantt chart and calculate the waiting and turnaround times for each process using a SJF scheduling algorithm The SIF algorithm is supposed to improve performance, but notice that we usually choose to arrive soon Compute what the waiting and turnaround times will be if the CPU is left idle for the first 1 unit and then SJF scheduling is used Remember that processes Pi and P2 are waiting during this idle time, so their waiting time may increase This algorithm could be alled future knowledge scheduling

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1 a  Draw the Gantt chart and calculate the waiting and turnaround times for each process using a FCFS scheduling algorithm  b  Draw the Gantt chart and calculate the waiting and turnaround times for each process using a SJD scheduling algorithm  c  The SIF algorithm is supposed to improve performance, but notice that we usually choose to run process P1 at when it arrived because we did not know that two shorter processes would arrive soon  Computer what the waiting and turnaround times will be if the CPU left 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 called future knowledge scheduling  1  Assume that a system has following processes and their arrival and burst times  Process Arrival Time Burst Time P1 P2 P3 12 4 4 7 a) b) a) Draw the Gantt chart and calculate the waiting and turnaround times for each process using a FCFS scheduling algorithm  Draw the Gantt chart and calculate the waiting and turnaround times for each process using a SJF scheduling algorithm  The SIF algorithm is supposed to improve performance, but notice that we usually choose to arrive soon  Compute what the waiting and turnaround times will be if the CPU is left idle for the first 1 unit and then SJF scheduling is used  Remember that processes Pi and P2 are waiting during this idle time, so their waiting time may increase  This algorithm could be alled future knowledge scheduling

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1 a. Draw the Gantt chart and calculate the waiting and turnaround times for each process using a FCFS scheduling algorithm. b. Draw the Gantt

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