1.3.Assume that the next valFor the Processes table below, calculate the average waiting time for the algorithms:Process Burst Time PriorityP1103P211HP324P415LP5In52i. Shortest Job First (SJF) andii. Priority Scheduling✓

Theory and Explanation: Introduction to Scheduling Algorithms: Scheduling algorithms are crucial in…

Answered: 1.3. Assume that the next val For the…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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The following processes are being scheduled using a priority (a smaller priority number implies a higher priority) and shortest job first all preemptive scheduling algorithms. Process Priority Burst Arrival P1 50 30 0 P2 40 35 25 P3 40 35 30 P4 45 25 60 P5 15 20 100 P6 20 20 105 Draw the Gantt charts that illustrate the execution of these processes using the above scheduling algorithms. What is the turnaround time of each process for each of the scheduling algorithms in part a? What is the waiting time of each process for each of these scheduling algorithms? Which of the algorithms results in the minimum average…
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?
Consider the following set of processes, with arrival times and the length of the CPU burst time given in milliseconds. a. Draw a Gantt chart that illustrates the execution of these processes using the Shortest-Remaining Time First (SRTF) scheduling algorithm. b. Give the average waiting time of Shortest-Remaining Time First (SRTF) scheduling algorithm. Note: Preempted processes are added to the end of the ready queue. Process Arrival Time Burst Time A 4 B 1 3 1 D 3 4 3
a) Find out the average waiting time, average response time and average turnaround time of the following processes using a. Shortest Remaining Time First Scheduling b. Preemptive Priority Scheduling Process Arrival Time Priority Execution Time P1 2 7 P2 1 4 P3 1 1 3 P4 3 2
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)
Consider the resource allocation graph shown below. Answer the following three sub- questions. D Write a set of processes. The answer is Write a set of resource types. The answer is Is the system in a deadlock? The answer is (Yes or No).
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.
Part I Assume that the ready queue has just received for processes: P1, P2, P3, P4, in that order. All at time 0. The CPU execution times for these processes are as follows: Process Execution Time P1 P2 P3 P4 13 8 15 6 Draw the Gantt chart and calculate the metric listed in parentheses for each of the following scheduling algorithms: 1. First Come, First Served (Total Wait Time) 2. Shortest Job First (Total Wait Time) 3. Round Robin, with a time quantum of 5 ms (Total Wait and Response Times) Part II Now assume that P1 arrives in the ready queue at time 0, P2 arrives at time 4, P3 arrives at time 10, and P4 arrives at time 20. The CPU execution times for the processes are the same as in Part I: Process Execution Time P1 P2 P3 P4 P1 13 P2 8 P3 15 P4 6 Draw the Gantt chart and calculate the total wait time for each of the following scheduling algorithms: 1. Shortest Job First 2. Shortest Remaining Time Next (remember, this is a preemptive algorithm) 3. Preemptive priority with the…
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 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,…
Consider the following set of processes (a smaller priority number implies a higher priority). The processes are assumed to have arrived in the order P1, P2, P3, P4, P5 all at time 0. Process Priority Burst Time P1 1 20 P2 3 25 P3 4 25 P4 2 15 P5 5 30 What is the waiting time of each process for each of the scheduling algorithms FCFS, SJF (if two jobs have the same burst time, schedule them following priority), non-preemptive priority? Process FCFS SJF Priority P1 P2 P3 P4 P5
1. Consider a real-time system in which there are five tasks. Their period and execution time are as follows: Task Execution Time Period T1 10 200 T2 25 150 T3 45 100 T4 15 75 T5 20 50 Perform EDF Scheduling on these task set.
Four processes arrive at the same time with their priorities, execution times and I/0 times given in the table below. Assuming a Round-Robin Scheduling works with a quantum time of 3, but the scheduler selects the with highest priority from the queue (NOT those arrived earliest), other than currently pre-empted process, at each turn3; process a-)Draw the timeline for CPU- and I/O- bursts for these processes b-)Calculate average turn-around time Exec 1/0 Exec /0 Process Priority 2. P1 10 4 P2 7. 4. 4 P3 1 10 1 4 Pa

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1.3. Assume that the next val For the Processes table below, calculate the average waiting time for the algorithms: Process Burst Time Priority P1 10 3 P2 1 1 H P3 2 4 P4 1 5 L P5 In 5 2 i. Shortest Job First (SJF) and ii. Priority Scheduling ✓