What is an EDF scheduler? What is its advantage over a rate monotonic scheduler?

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
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5. What is an EDF scheduler? What is its advantage over a rate monotonic scheduler?
6. Consider the following set of processes, with the length of the CPU-burst time given
in milliseconds:
Burst Time Priority
Process
P1
10
3
P2
1
1
P3
3
P4
1
4
P5
5
2
The processes are assumed to have arrived in the order P1, P2, P3, P4, P5, all at time 0.
a. Draw four Gantt charts illustrating the execution of these processes using FCFS, SJF,
a non-preemptive priority (a smaller priority number implies a higher priority), and
RR (quantum = 1) scheduling.
b. Which of the schedules in part a result in the minimal average waiting time (over all
processes)?
Transcribed Image Text:5. What is an EDF scheduler? What is its advantage over a rate monotonic scheduler? 6. Consider the following set of processes, with the length of the CPU-burst time given in milliseconds: Burst Time Priority Process P1 10 3 P2 1 1 P3 3 P4 1 4 P5 5 2 The processes are assumed to have arrived in the order P1, P2, P3, P4, P5, all at time 0. a. Draw four Gantt charts illustrating the execution of these processes using FCFS, SJF, a non-preemptive priority (a smaller priority number implies a higher priority), and RR (quantum = 1) scheduling. b. Which of the schedules in part a result in the minimal average waiting time (over all processes)?
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