Consider the following processes: Process Arrival Time Service Time A 0 4 B 1 3 C 2 3 D 2 2 E 3 1 F 5 3 Show (draw the schedule, x-axis is time, and one row for each CPU) how the above processes execute over time on a system with 2 CPUs. Compute the average turnaround time for all processes and the average utilization for each CPU under each of the following schedulers:
Consider the following processes: Process Arrival Time Service Time A 0 4 B 1 3 C 2 3 D 2 2 E 3 1 F 5 3 Show (draw the schedule, x-axis is time, and one row for each CPU) how the above processes execute over time on a system with 2 CPUs. Compute the average turnaround time for all processes and the average utilization for each CPU under each of the following schedulers:
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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Question
Consider the following processes:
Process Arrival Time Service Time
Process Arrival Time Service Time
A | 0 | 4 |
B | 1 | 3 |
C | 2 | 3 |
D | 2 | 2 |
E | 3 | 1 |
F | 5 | 3 |
Show (draw the schedule, x-axis is time, and one row for each CPU) how the above
processes execute over time on a system with 2 CPUs. Compute the average turnaround
time for all processes and the average utilization for each CPU under each of the following
schedulers:
(a) FCFS with a single Ready Queue. A process gets scheduled once one of the CPUs
is available. When both CPUs are available, we select CPU1.
(b) FCFS with a Ready Queue per CPU. Processes A, B, and C go to CPU1 and processes
D, E, and F go to CPU2.
(c) HRRN with a single Ready Queue. A process gets scheduled once one of the CPUs
is available. When both CPUs are available, we select CPU1.
is available. When both CPUs are available, we select CPU1.
(b) FCFS with a Ready Queue per CPU. Processes A, B, and C go to CPU1 and processes
D, E, and F go to CPU2.
(c) HRRN with a single Ready Queue. A process gets scheduled once one of the CPUs
is available. When both CPUs are available, we select CPU1.
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