1. NET 424: REAL-TIME SYSTEMS (Practical Part)
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Tutorial 4 : on lecture 4

2. Question 1
Assume 3 tasks given the following execution time and periods:
Task 1 {0.6,3}.
Task 2 {1.2,4}.
Task 3 {0.6,2}.
1- what is the least common multiple of the periods ?
2- what is the maximum number of jobs in each hyper-period ?
3- calculate the utilization of each task.
4- calculate the total utilization.
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3. Answer 1- what is the least common multiple of the periods ? LCM=12
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4. Answer (Cont.)
2- what is the maximum number of jobs in each hyper-period ?
maximum number of jobs in each hyper- period=13
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5. Answer (Cont.) 3- calculate the utilization of each task.
Utilization of task 1: 0.2
Utilization of task 2: 0.3
Utilization of task 3: 0.3
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6. Answer (Cont.) 4- calculate the total utilization.
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7. Question 1
Assume 3 tasks given the following execution time and periods:
Task 1 {0.1,2}.
Task 2 {0.2,4}.
Task 3 {0.2,3}.
Task 4 {0.3,6}.
Task 5 {0.1,1}.
1- what is the least common multiple of the periods ?
2- what is the maximum number of jobs in each hyper- period ?
3- calculate the utilization of each task.
4- calculate the total utilization.
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8. Answer 1- what is the least common multiple of the periods ? LCM=12
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9. Answer (Cont.)
2- what is the maximum number of jobs in each hyper-period ?
maximum number of jobs in each hyper- period=27
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10. Answer (Cont.) 3- calculate the utilization of each task.
Utilization of task 1: 0.05
Utilization of task 2: 0.05
Utilization of task 3: 0.06
Utilization of task 4: 0.05
Utilization of task 5: 0.1
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11. Answer (Cont.) 4- calculate the total utilization.
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12. The End
Any Questions ?
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