Consider the following set of 5 processes, with the length of the CPU-burst time given in milliseconds arriving at time 0: P1, P2, P3, P4, and P5 with corresponding burst time: 20, 47, 13, 17 and 22.   The processes are assumed to have arrived in the order P1, P2, P3, P4, P5, all at time 0. a. Calculate average waiting time for First Come First Serve and None Preemptive Shortest Job First CPU scheduling algorithms.        b. Which of the schedules in part a results in the minimal average waiting time (over all processes)?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Consider the following set of 5 processes, with the length of the CPU-burst time given in milliseconds arriving at time 0: P1, P2, P3, P4, and P5 with corresponding burst time: 20, 47, 13, 17 and 22. 

 The processes are assumed to have arrived in the order P1, P2, P3, P4, P5, all at time 0.

a. Calculate average waiting time for First Come First Serve and None Preemptive Shortest Job First CPU scheduling algorithms.       

b. Which of the schedules in part a results in the minimal average waiting time (over all processes)?

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