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User program = 0 t = 10 t=40 Printer interrupt service routine t = 15 t=25 Figure 3.14 Example Time Sequence of Multiple Interrupts Communication interrupt service routine |||||||||| t = 35 t=25 Disk interrupt service routine

User program = 0 t = 10 t=40 Printer interrupt service routine t = 15 t=25 Figure 3.14 Example Time Sequence of Multiple Interrupts Communication interrupt service routine |||||||||| t = 35 t=25 Disk interrupt service routine

Database System Concepts
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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Consider a system with three I/O devices: a printer, a disk, and a communications line, with increasing priorities of 2, 4, and 5, respectively.. A user program begins at t = 0. At t = 5, a printer interrupt occurs;  at t = 15, a communications interrupt occurs. While this routine is executing, a disk interrupt occurs (t = 20).

Printer Interrupt service takes 10 time slots.

Communication Interrupt Service takes 10 time slots.

Disk Interrupt Service takes 8 time slots.

 

When will the control return to the user program? Show the changes in the following diagram

User program = 0 t = 10 t=40 Printer interrupt service routine t = 15 t=25 Figure 3.14 Example Time Sequence of Multiple Interrupts Communication interrupt service routine |||||||||| t = 35 t=25 Disk interrupt service routine
Transcribed Image Text:User program = 0 t = 10 t=40 Printer interrupt service routine t = 15 t=25 Figure 3.14 Example Time Sequence of Multiple Interrupts Communication interrupt service routine |||||||||| t = 35 t=25 Disk interrupt service routine
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