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a. The following table shows the priority of three tasks base on the timeline execution of the tasks in Figure Q4.1. In this figure 'E' represents a single tick of execution time, 'Q' represents an execution tick with access to the Q critical section and 'V' represents an execution tick with access to the V critical section. Answer the following questions. Table Q4.1 Process Taskl Task2 Task3 task Priority High Medium Low

a. The following table shows the priority of three tasks base on the timeline execution of the tasks in Figure Q4.1. In this figure 'E' represents a single tick of execution time, 'Q' represents an execution tick with access to the Q critical section and 'V' represents an execution tick with access to the V critical section. Answer the following questions. Table Q4.1 Process Taskl Task2 Task3 task Priority High Medium Low

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
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Problem Solving: Priority Inversion a. The following table shows the priority of three tasks base on the timeline execution of the tasks in Figure Q4.1. In this figure 'E' represents a single tick of execution time, 'Q' represents an execution tick with access to the Q critical section and 'V' represents an execution tick with access to the V critical section. Answer the following questions. Table Q4.1 i. ii. iii. Process Taskl Task2 Task3 task 1 task task2 Priority High Medium Low 1 task3 EQ 1 1 I E V I 2 4 E 1 1 1 VV 1 V 1 1 EE I T I T 6 8 I 1 1 1 I QQQ 1 Figure Q4 I 1 QEE 1 T I I I T Base on the sketch discuss priority inversion situation. I E 10 12 14 16 18 1 time Redraw the timeline and show the following three situations in the timeline. Executing Preempted Blocked Sketch two timeline diagrams to show different solutions to limit the effect of priority inversion using priority inheritance and original ceiling priority protocol, the ceiling values for resources Q and V is high or 3. Discuss the differences, if any.
Transcribed Image Text:Problem Solving: Priority Inversion a. The following table shows the priority of three tasks base on the timeline execution of the tasks in Figure Q4.1. In this figure 'E' represents a single tick of execution time, 'Q' represents an execution tick with access to the Q critical section and 'V' represents an execution tick with access to the V critical section. Answer the following questions. Table Q4.1 i. ii. iii. Process Taskl Task2 Task3 task 1 task task2 Priority High Medium Low 1 task3 EQ 1 1 I E V I 2 4 E 1 1 1 VV 1 V 1 1 EE I T I T 6 8 I 1 1 1 I QQQ 1 Figure Q4 I 1 QEE 1 T I I I T Base on the sketch discuss priority inversion situation. I E 10 12 14 16 18 1 time Redraw the timeline and show the following three situations in the timeline. Executing Preempted Blocked Sketch two timeline diagrams to show different solutions to limit the effect of priority inversion using priority inheritance and original ceiling priority protocol, the ceiling values for resources Q and V is high or 3. Discuss the differences, if any.
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