Consider 5 processes, A, B, C, D and E, arriving to a system with a single CPU according to the table below. Each process has an arrival time and service time (time needed on the CPU). Assume the CPU services these processes in a First-in-First-Out (FIFO) fashion. Also assume that the CPU is used 100% of the time during the service time of any process. Arrival Time Service Time (Execution Time) 0 sec 2 sec 3 sec 6 sec 1 sec 4 sec Process A Process B Process C Process D Process E 1 sec 7 sec 8 sec 10 sec
Consider 5 processes, A, B, C, D and E, arriving to a system with a single CPU according to the table below. Each process has an arrival time and service time (time needed on the CPU). Assume the CPU services these processes in a First-in-First-Out (FIFO) fashion. Also assume that the CPU is used 100% of the time during the service time of any process. Arrival Time Service Time (Execution Time) 0 sec 2 sec 3 sec 6 sec 1 sec 4 sec Process A Process B Process C Process D Process E 1 sec 7 sec 8 sec 10 sec
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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(b) Draw the utilization of the CPU over time. (I.e., time as x-axis and utilization as y-axis)
(c) What is the average utilization of the CPU?
Transcribed Image Text:Consider 5 processes, A, B, C, D and E, arriving to a system with a single CPU according to
the table below. Each process has an arrival time and service time (time needed on the
CPU). Assume the CPU services these processes in a First-in-First-Out (FIFO) fashion. Also
assume that the CPU is used 100% of the time during the service time of any process.
Arrival Time
Service Time (Execution Time)
Process A
Process B
Process C
Process D
Process E
0 sec
1 sec
7 sec
8 sec
10 sec
2 sec
3 sec
6 sec
1 sec
4 sec
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