Scheduling algorithm
1.Six processes A, B, C, D, E, F are run under an operating system which uses priority scheduling. The arrangement is to decrement the priority of a process after it has run for a quantum. In the case of equal priorities, the process suspended for the longest time is chosen to run. The priorities assigned to the processes are 20, 11, 15, 12, 18, 14 respectively, and are all long CPU-bound processes. If the quantum is 100 ms, then how much CPU time has each process received after 2 seconds
2.Five processes A, B, C, D, E require the following amounts of CPU time respectively: 1 s, 0.5 s, 0.2 s, 0.6 s, 0,3 s. The processes are run using multiple-queue scheduling, where one quantum is 150 ms, and the context switch time is 20 ms. Calculate the elapsed runtimes of each process. (Note that when a process terminates, the scheduler immediately switches to another process.)
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The following processes are being scheduled using a pre-emptive, priority-based, round-robin scheduling algorithm. Process Burst Time...
The following processes are being scheduled using a pre-emptive, priority-based, round-robin scheduling algorithm. Process Burst Time Priority Arrival 20 20 0 20 25 45 55 5 5 5 15 Each process is assigned a numerical priority, with a higher number indicating a higher relative priority. The scheduler will execute the highest-priority process. For processes with the same priority, a round-robin scheduler will be used with a time quantum of 10 units. If a process is pre-empted by a higher-priority process,...
Answer the following question: A Multi Level Feedback (MLF) algorithm uses 5 priority levels. All levels...
Answer the following question: A Multi Level Feedback (MLF) algorithm uses 5 priority levels. All levels are using Round Robin (RR) Scheduling algorithm with Quantum: 1 ms, 2 ms, 4 ms, 8 ms, 16 ms respectively. Processes start at highest priority (Q=1) and is down graded to the lower priority if it didn't finish within 1 quantum. The following processes are to be scheduled: Arrival Io Wait 0 3 Process P1 P2 P3 CPU Burst 2 4 15 4 1...
The following processes are being scheduled using a preemptive, roundrobin scheduling algorithm. Each process is assigned...
The following processes are being scheduled using a preemptive, roundrobin scheduling algorithm. Each process is assigned a numerical priority, with a higher number indicating a higher relative priority. In addition to the processes listed below, the system also has an idle task (which consumes no CPU resources and is identified as I ). This task has priority 0 and is scheduled whenever the system has no other available processes to run. The length of a time quantum is 5 units....
Description In this homework, you are asked to implement a multithreaded program that will allow ...
Description In this homework, you are asked to implement a multithreaded program that will allow us to measure the performance (i.e, CPU utilization, Throughput, Turnaround time, and Waiting time in Ready Queue) of the four basic CPU scheduling algorithms (namely, FIFO, SJE PR, and RR). Your program will be emulating/simulating the processes whose priority, sequence of CPU burst time(ms) and I'O burst time(ms) will be given in an input file. Assume that all scheduling algorithms except RR will be non-preemptive,...
Consider a multilevel feedback queue shown below. Assuming that the following processes are the only ones...
Consider a multilevel feedback queue shown below. Assuming that the following processes are the only ones that exist, determine the finish time for each of the processes. Assume that each queue is following FCFS scheduling policy. CPU first schedules all processes in the top queue (Quantum-8) before scheduling processes in queue 2 (Quantum 16), and only then it will schedule processes in queue 3 (FCFS). CPU Burst time Arrival time Priority Process P1 8 15 1 P2 10 15 2...
This assignment requires you to create simulations for different scheduling algorithms commonly employed by operating systems...
This assignment requires you to create simulations for different
scheduling algorithms commonly employed by operating systems to
achieve multiprogramming. All problems in this assignment assume
the following:
The simulations you will be creating are for a uniprocessor
system (single CPU).
Processes in these simulations will require CPU bursts of one or
more time units followed by I/O bursts of one or more time units.
For simplicity’s sake, when more than one process is executing its
I/O burst at the same...
4. Consider a ready queue with four processes :- Process Arrival Time Burst Time (ms) P1...
4. Consider a ready queue with four processes :- Process Arrival Time Burst Time (ms) P1 Priority P2 P3 P4 P5 For each of the following CPU scheduling algorithms, determine the turnaround and average waiting time for each of the process :- a. Shortest remaining Time First b. Shortest Job First C. Priority Scheduling (Both pre-emptive and non-preemptive) d. Round Robin (quantum is 1 ms)
Assume a dynamic queue which is serviced by a Priority Based Round Robin algorithm such that ther...
Assume a dynamic queue which is serviced by a Priority Based Round Robin algorithm such that there exists three priorities (1,2,3) which are used as multipliers of the basic time quantum value with the resulting number being the maximum service time the corresponding job will receive each time it gets the CPU. For a maximum amount of time equal to 1 basic time quantum , a priority 2 job gets the CPU for the maximum amount of time equal to...
Implement a First Come First Serve (FCFS) non-preemptive OS scheduling simulation with multiple processes, in python...
Implement a First Come First Serve (FCFS) non-preemptive OS scheduling simulation with multiple processes, in python or c++. The simulation takes the 3 processes(listed below) and they all arrive at time 0. A single process consists of {CPU BURST, I/O BURST, CPU BURST, I/O BURST, etc…} The simulation accounts for all 3 processes, and does not run one process at a time. Process1 {4,24,5,73,3,31,5,27,4,33,6,43,4,64,5,19,2} Process2 {18,31,19,35,11,42,18,43,19,47,18,43,17,51,19,32,10} Process3 {6,18,4,21,7,19,4,16,5,29,7,21,8,22,6,24,5} For example at time 0, Process1 arrives and enters running state, Process2...
Opearting system 5. [27pts.] Given the following set of processes, with arrival times, priorities, and the...
Opearting
system
5. [27pts.] Given the following set of processes, with arrival times, priorities, and the length of the CPU burst in ms: Process Arrival Time Burst time Priority P1 P2 P3 2 10 P4 (Note: a lower number means higher priority; processes P2- P4 arrive at the same time, in the given order) a. Draw a Gantt chart showing a FCFS scheduling algorithm. b. Draw a Gantt chart showing a non-preemptive Priority scheduling algorithm. Draw a Gantt chart showing...
The following processes are being scheduled using a pre-emptive, priority-based, round-robin scheduling algorithm. Process Burst Time Priority Arrival 20 20 0 20 25 45 55 5 5 5 15 Each process is assigned a numerical priority, with a higher number indicating a higher relative priority. The scheduler will execute the highest-priority process. For processes with the same priority, a round-robin scheduler will be used with a time quantum of 10 units. If a process is pre-empted by a higher-priority process,...
Answer the following question: A Multi Level Feedback (MLF) algorithm uses 5 priority levels. All levels are using Round Robin (RR) Scheduling algorithm with Quantum: 1 ms, 2 ms, 4 ms, 8 ms, 16 ms respectively. Processes start at highest priority (Q=1) and is down graded to the lower priority if it didn't finish within 1 quantum. The following processes are to be scheduled: Arrival Io Wait 0 3 Process P1 P2 P3 CPU Burst 2 4 15 4 1...
Description In this homework, you are asked to implement a multithreaded program that will allow us to measure the performance (i.e, CPU utilization, Throughput, Turnaround time, and Waiting time in Ready Queue) of the four basic CPU scheduling algorithms (namely, FIFO, SJE PR, and RR). Your program will be emulating/simulating the processes whose priority, sequence of CPU burst time(ms) and I'O burst time(ms) will be given in an input file. Assume that all scheduling algorithms except RR will be non-preemptive,...
Consider a multilevel feedback queue shown below. Assuming that the following processes are the only ones that exist, determine the finish time for each of the processes. Assume that each queue is following FCFS scheduling policy. CPU first schedules all processes in the top queue (Quantum-8) before scheduling processes in queue 2 (Quantum 16), and only then it will schedule processes in queue 3 (FCFS). CPU Burst time Arrival time Priority Process P1 8 15 1 P2 10 15 2...
This assignment requires you to create simulations for different
scheduling algorithms commonly employed by operating systems to
achieve multiprogramming. All problems in this assignment assume
the following:
The simulations you will be creating are for a uniprocessor
system (single CPU).
Processes in these simulations will require CPU bursts of one or
more time units followed by I/O bursts of one or more time units.
For simplicity’s sake, when more than one process is executing its
I/O burst at the same...
4. Consider a ready queue with four processes :- Process Arrival Time Burst Time (ms) P1 Priority P2 P3 P4 P5 For each of the following CPU scheduling algorithms, determine the turnaround and average waiting time for each of the process :- a. Shortest remaining Time First b. Shortest Job First C. Priority Scheduling (Both pre-emptive and non-preemptive) d. Round Robin (quantum is 1 ms)
Opearting
system
5. [27pts.] Given the following set of processes, with arrival times, priorities, and the length of the CPU burst in ms: Process Arrival Time Burst time Priority P1 P2 P3 2 10 P4 (Note: a lower number means higher priority; processes P2- P4 arrive at the same time, in the given order) a. Draw a Gantt chart showing a FCFS scheduling algorithm. b. Draw a Gantt chart showing a non-preemptive Priority scheduling algorithm. Draw a Gantt chart showing...
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