5- Three processes P1, P2 and P3 have Process(arrival time, execution time) as follows. P1(0,7), P2(2,4), P3(3,1). Find the average waiting time for these processes if they are scheduled as Shortest Remaining Time First.
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- Consider the following processes:Process Arrival Time Service Time A 0 4 B 1 3 C 2 3 D 2 2 E 3 1 F 5 3 Show (draw the schedule, x-axis is time, and one row for each CPU) how the aboveprocesses execute over time on a system with 2 CPUs. Compute the average turnaroundtime for all processes and the average utilization for each CPU under each of the following schedulers: (a) FCFS with a single Ready Queue. A process gets scheduled once one of the CPUsis available. When both CPUs are available, we select CPU1. (b) FCFS with a Ready Queue per CPU. Processes A, B, and C go to CPU1 and processesD, E, and F go to CPU2. (c) HRRN with a single Ready Queue. A process gets scheduled once one of the CPUsis available. When both CPUs are available, we select CPU1.Suppose there are five processes, their arrival time and running time are listed as follows. Adopt FCFS and SJF, respectively, give the schedule order and average waiting time. Give the schedule order of SJF. Compute the average waiting time of SJF. Process Arrival time Running time P1 P2 P3 P4 0 3 4 5 3 10 6 1Let the processes P1, P2, P3, P4, and P5 be given. They arrive in the system at the same time in this order. The processes have the attached service times (in time units) and priorities. For each of the scheduling methods (First Come, first served (FIFO), Shortest Job First, Round Robin, and Priority Scheduling), specify the execution order of the processes and the average execution time (average turnaround time) for all processes. First, determine and state the execution times of the individual processes and then calculate the average value. Note: • For Shortest Job First, If the required service time (CPU time) is the same for two or more processes, use First Come, first served to resolve the conflict. • For Round Robin, the time quantum q = one time unit. • For Priority Scheduling, low integer priority values signify high priorities, with O being the highest possible priority. If multiple processes have the same priority, use First Come, first served to resolve the conflict. Also,…
- Let the processes P1, P2, P3, P4, and P5 be given. They arrive in the system at the same time in this order. The processes have the attached file as service times (in time units) and priorities. For each of the scheduling methods (First Come, first served (FIFO), Shortest Job First, Round Robin, and Priority Scheduling), specify the execution order of the processes and the average execution time (average turnaround time) for all processes. First, determine and state the execution times of the individual processes and then calculate the average value. Note: • For Shortest Job First, If the required service time (CPU time) is the same for two or more processes, use First Come, first served to resolve the conflict. • For Round Robin, the time quantum q = one time unit. • For Priority Scheduling, low integer priority values signify high priorities, with O being the highest possible priority. If multiple processes have the same priority, use First Come, first served to resolve the conflict.…Consider a computer system which has four identical units of a resource R. There are three processes each with a maximum claim of two units of resource R. Processes can request these resources in any way that is, two in one shot or one by one. The system always satisfies a request for a resource if enough resources are available. If the processes don't request any other kind of resource, show that the system never deadlocks?Assuming that there are 5 processes (P1, P2, P3, P4 and P5) which are processed by a CPU.The processes need 3 resources (A, B and C). The following information shows the current resources allocated to each process and also the maximum resources they required in order to complete their processes. Given that the available resources are 4, 2, 2 respectively. Processes Allocated Resources Maximum Resources Required A B C A B C P1 2 1 2 5 3 2P2 3 2 3 6 5 4P3 1 3 4 6 6 6P4 7 8 8 10 18 16P5 6 7 5…
- QUESTION TWO A. (i) Describe Banker’s algorithm for deadlock avoidance with supporting example (ii)Consider a computer system with has four identical units of a resource R. There are three processes each with a maximum claim of two units of resource R. Processes can request these resources in anyway, that is, two in one shot or one by one. The system always satisfies a request a request for a resource if enough resources are available. If the process doesn’t request any other kind of resource, show that the system never deadlock B. Give a solution for the following synchronization problem using semaphores (i)Producer- Consumer Problem (ii)Readers- Writers Problem C. List out the issues in preprocessor scheduling that causes performance degradation in multiprocessor systemsHey, I have already received a good answer to this question but I am looking for greater detail to be provided. There are three processes P1, P2 and P3 are running in a system with 3 instances of a resource R1, 2 instances of a resource R2, and 2 instances of a resource R3. At a given time the allocation matrix is: A = [{1, 1, 1} { 0, 1, 0} { 1, 0, 0 }] Assume that the maximum matrix is M = [ {2,2,1} {1,1,1} {3,1,0}] While in this state, a new process P4 is created which requires at most 2 instances of R1 and one instance of R2. This process initially requests one instance of R1 to be allocated to it. Using the Banker’s algorithm, determine whether this request can be granted or must be refused.11 Consider a situation where 5 instances of a resource are available. That means maximum 5 processes are allowed to enter the critical section at any point in time. Please provide a solution using a counting semaphore. Write the pseudocode for each process.
- 4. With a single resource, deadlock occurs a. if there are more than two processes competing for that resource b. if there are only two processes competing for that resource c. if there is a single process competing for that resource d. none of theseYou were given five processes with their arrival time and execution time for each in the table. Process Arrival time Execution time Processes A 0 4 Processes B 2 3 Processes C 3 4 Processes D 5 5 Develop the schedule (time diagram) for the following methods. First-Come-First-Served (FCFS) Round Robin Shortest Process Next (SPN) Assume the length of the time quantum, or slice is 1 (q=1)Processes P1, P2, and P2 are queued to run. The arrival time of P1 is t = 0, the arrival time of P2 is t = 1, and the arrival time of P3 is t = 2. According to the first come first serve (FCFS) algorithm, processes are run by the operating system. P1 operates 7 time units, P2 4 time units, P3 operates 1 time unit. So what is the average waiting time (in time units) for this system? 0 5 3 7