Consider four periodic tasks (T1, T2, T3 and T4) with the following arrival times,computation times, deadlines and priority, in Table Q1.TasksT1T2T3T4ExecutingFixedPriorityVery highHighLowVery lowTable Q1Arrivaltime7510PreemptedComputation Deadlinetimes35751591515BlockedDraw timeline diagrams to show the execution of the following scheduling policies. Ineach timeline show the three situations: executing, preempted and blocked, whenappropriate using the legend given in Table Q1.i. Non-Preemptive fixed-priority schedulingii. Preemptive fixed-priority schedulingiii. Earliest Deadline First (EDF) scheduling

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Answered: Consider four periodic tasks (T1, T2,…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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11 Consider the following three independent periodic tasks: T₁ = (4, 1), T₂ = (5, 2), T3 = (10, 2). T₁ and T3 are preemptable, but T₂ is not. (a) Construct the RM schedule of the system in the first 20 units of time. (b) Construct the EDF schedule of the system in the first 20 units of time.
(b) Use the Rate Monotonic Scheduling (RMS) scheduling algorithm for the three task below: Task Сарасity Period T1 1 5 T2 3 5 T3 6. 20 (i) What is the Least Common Multiple (LCM) to schedule? (ii) Check the schedulability of these tasks using RMS and confirm whether or not you can determine the schedulability. (iii) What are the dynamic priorities for these three tasks? (iv) Illustrate the execution of the tasks based on RMS in a diagram.
Which form of process scheduling may be shown to be provably optimal?
If a sporadic implicit deadline task set is schedulable under RM, will it be schedulable under RM after enlarging one of the deadlines (now it becomes an arbitrary deadline task set)? Note that we are still following the original RM priority order (not DM). What if we follow DM order?
To not let any process wait longer than 500 ms, a system developer programs the Round Robin procedure with a dynamic time quantum size. With ‘n’ processes ready, the time quantum Q is set to 500 ms/n. What do you think of this scheduling strategy? (In which situations is this strategy feasible, and when is it not? Are there edge cases?) Explain your reasoning.
Suppose that the following processes arrive for execution at the times indicated. Each process will run for the amount of time listed. In answering the questions, use preemptive scheduling, and base all decisions on the information you have at the time the decision must be made. Process P1 P2 P3 P4 P5 Arrival Time 0 2 4 6 8 Burst Time 12 4 8 2 6 What is the average waiting time for these processes with the Shortest-Job-First scheduling algorithm?
Task 3 A system has 5 processes and 5 types of resources. The current state of the system is as follows: Process Allocated (C) Requested (R) Available (A) II₁ 1 2 2 3 1 0 3 3 3 3 X 2 4 1 7 П2 2 1 20 1 6 23 23 II3 5 1002 9 3 20 ΠΑ 20 21 1 3 14 02 II5 201 10 12 4 5 0 5 What is the smallest values of \ for which the system is in a safe state? Justify your answer.
Process PI P2 P3 P4 P5 Buast time 2 1 8 4 5 Priority (2*xx) %5 (2xxx) 5 (2*XX) 0/0 5 (2*XX) do 5 (2*xx) do 5 ✓ 11 Value of XX is 5 All processes Arrives at time + = 0 ms. Draw the Gantt chart for priority scheduling (A larger priority number implies higher priority)
Please choose the best choices for the given question. in the box 1.Random selection of the key-value 2.Automatically rearrange its data element whenever data adversary is detected beyond the data boundary 3.At the beginning, initialize its data structure in the best state it can be and maintain its property for any update operation 4.Uniform distribution of data 5.Greedily select the best data available 6.Blindly divide the input data by half and conquer them
Which facets of Shortest Job First Scheduling are similar to those of Priority Scheduling, and which are distinct?
Process Burst Time Priority P1 6 3 P2 1 P3 P4 4 P5 3 The processes are assumed to have arrived in the order P1, P2, P3, P4, P5 all at time e. a. Draw four Gantt charts that illustrate the execution of these processes using the following scheduling algorithms: FCFS, non- preemptive SJF, non-preemptive priority (a larger priority number implies a higher priority)and RR (quantum = 2). b. What is the turnaround time of each process for each of the scheduling algorithms in part a? c. What is the waiting time of each process for each of these scheduling algorithms? d. Which of the algorithms results in the minimum average waiting time (over all processes 2. 2. 5. 4)
Eight batch jobs arrive almost at the same time in the following order: I₁, 2, ..., II8. The table below contains their running times and priorities: Job П1 П2 П3 П4 П П П П Running time (in min) 4 5 5 10 8 10 7 Priority 1 7 5 2 8 6 4 3 The highest priority is 1. For each of the following scheduling algorithms, determine the order of execution of processes and the mean process turnaround time: (a) priority scheduling; (b) first-come, first-served; (c) shortest job first. Scheduling is non-preemptive.

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