a) Draw a Gantt chart showing FCFS scheduling for these jobs and find average waiting time. b) Draw a Gantt chart showing (non-preemptive) SJF schedulingand find average waiting time c) Draw a Gantt chart showing non-preemptive PRIORITY schedulingand find average turn- around time.
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- Let the processes P1, P2, P3, and P4 be given. They arrive in the system at the same time in this order. The processes have the following service times (in time units): Process Service time (CPU burst) P1 53 P2 17 P3 68 P4 24 2) For the scheduling method "Round Robin" (RR), specify the average execution time (average turnaround time) and the number of context switches. The time quantum q is set to 20 time units. You must show your calculations. You will not have to draw Gantt charts. Note: For RR, processes execute in order of their ID (i.e., P1-P2-P3- P4).Multiprocessor systems use multiple CPUS to perform various tasks. This increases throughput and reduces response time. In this problem, a multiprocessor system has a certain number of processors. Each processor has the ability to schedule a limited number of processes in one second. However, after this scheduling, the processor's ability is reduced to floor(ability/2). Given the processor's abilities and the number of processes, what is the minimum time required to schedule all the processes in the system? Example n = 5 (number of processors and size of ability[]) ability = [3, 1, 7, 2, 4] processes = 15 This optimal solution is: 1. First, the processor with ability = 7 schedules 7 processes in one second. Now, ability = [3, 1, 3, 2, 4] because 7 was reduced to floor(7/2). There are 15 - 7 = 8 remaining processes. 2. Second, the processor with ability = 4 is used. After that, ability = [3, 1, 3, 2, 2]. Remaining processes = 8 - 4 = 4. 3. Third, a processor with ability = 3 is used.…Consider the following set of jobs to be scheduled for execution on a single CPU system. Job Arrival Time Size (msec) Priority 2 (Silver) 1 (Gold) 3 (Bronze) 2 (Silver) 3 (Bronze) 1 (Gold) 10 J2 J3 JA J5 J6 8 3 3 10 4 12 1 15 4 a) Draw a Gantt chart showing FCFS scheduling for these jobs and find average waiting time. b) Draw a Gantt chart showing (non-preemptive) SJF scheduling and find average waiting time c) Draw a Gantt chart showing non-preemptive PRIORITY scheduling and find average turn-around time. d) Draw a Gantt chart showing preemptive PRIORITY scheduling and find average waiting time. e) Which of the foregoing scheduling policies provides the lowest waiting time for this set of jobs? What is the waiting time with this policy?
- Problem 4 There are two approaches for scheduling tasks on multiprocessor platform: the partitioned approach and the global approach. The table below shows Ci (WCET) and Ti (period) for six periodic tasks to be scheduled on m = 3 processors. The relative deadline of each periodic task is equal to its period. T T1 10 T2 10 25 T3 12 30 T4 10 T5 8. 20 T6 7 100 The task set is schedulable using rate-monotonic partitioned scheduling algorithm. Show how the task set is partitioned on m = 3 processors so that all the deadlines are met?Please Implement in C programming Language Given the list of processes, their CPU burst times, arrival times, and priorities implement the SJF scheduling algorithm on the processes with preemption. Compute and print the completion Time(CT), Turnaround Time(TAT), and Waiting Time(WT) for each process using C Programming. Waiting time: Processes need to wait in the process queue before execution starts and in execution while they get preempted. Turnaround time: Time elapsed by each process to get completely served. (Difference between submission time and completion time). Task 1: SJF Scheduling with preemption You can use the following input as a sample:Please Implement in C programming Language Given the list of processes, their CPU burst times, arrival times, and priorities implement the Priority scheduling algorithm on the processes with preemption. Compute and print the completion Time(CT), Turnaround Time(TAT), and Waiting Time(WT) for each process using C Programming. Waiting time: Processes need to wait in the process queue before execution starts and in execution while they get preempted. Turnaround time: Time elapsed by each process to get completely served. (Difference between submission time and completion time).
- Given the list of processes, their CPU burst times, arrival times and priorities implement SJF,Priority and Round Robin scheduling algorithms on the processes with preemption. For each ofthe scheduling policies, compute and print the completion Time(CT), Turnaround Time(TAT),and Waiting Time(WT) for each process using C Programming.Waiting time: Processes need to wait in the process queue before execution starts and inexecution while they get preempted. Turnaround time: Time elapsed by each process to get completely served. (Difference betweensubmission time and completion time).Consider the following processes and their associated threads running on a multiprocessor system: Process Thread Arrival Time CPU Burst I/O Burst Total CPU Time X X1 0 4 2 11 X2 3 2 4 5 X3 3 2 4 5 Y Y1 5 6 2 14 Y2 5 3 5 7 Z Z1 7 1 1 6 Z2 7 3 2 10 Create a scheduling simulation for these threads on a system with two (2) processors using the First Come First Served (FCFS) algorithm. A thread may migrate from one processor to another if it returns from blocked waiting time and 1) the processor it was running on previously is occupied with other work; and 2) and the other processor is available to execute the thread. If both processors are available when a thread becomes unblocked, it will remain on the processor it was most recently running on. In this simulation, you will be managing a single ready queue that schedules all processes. When two processes arrive in the ready queue at…3. Job Scheduling: Consider the problem of scheduling n jobs of known durations t1, t2, ..., tn, for execution by a single processor. The jobs can be executed in any order, one job at a time. You want to find a schedule that minimizes the total time spent by all the jobs in the system. (The time spent by one job in the system is the sum of the time spent by this job in waiting plus the time spent on its execution.) Design a greedy algorithm for this problem. Does the greedy algorithm always yield an optimal solution?
- In a timesharing OS we have the following cpu timeline for two tasks X and Y. The timeslice is 1s.Both tasks are available in the system at the same time t=9:00:00.000 and order of arrival is the obviousX followed by Y. (The decimals reflect milliseconds if they showup in an indicated time reference.) There are no other processes (tasks) in the system other than X,Y. 1234567890 XYXYX--YXY The time line 1 indicates that at t=9:00:00s task X starts its execution and when t=9:00:01s is reached task Y takes over. The time line 1 indicates the 'first second' and time line 0 indicates the 'tenth second' above.Task Y completes its execution at t=9:00:10s, the completion of the tenth second since X started its execution. Task X has completed its execution earlier. (a) What is the total number of context switches starting from prior to t=9:00:00s (e.g. t=8:59:59.999) through thecompletion of $Y$? answer is 16s (b) What is the turnaround time for Y? answer is 10s (c) What is…Principle of locality is defined by Stallings as the tendency of a processor to access the same set of memory locations repetitively over a short period of time. Locality is a universal behavior of all computational processes: They tend to refer repeatedly to subsets of their resources over extended time intervals. Use your own words to answer the following questions: What is the distinction between spatial locality and temporal locality? In general, what are strategies for exploiting spatial locality and temporal locality? How does the principle of locality relate to the use of multiple memory levels?Consider four processes with the following start and end times: Process Start Time End Time ABCD 3 5 1 7 6 12 4 9 For each pair of proceses, say whether they run concurrently (Y) or not (N). (a) AB (b) AC (c) AD (d) BC (e) BD (f) CD