27 lines
896 B
Python
27 lines
896 B
Python
import numpy as np
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import include.TasksHelper as TH
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# The tasks is an Array with three columns and n Rows
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# Each Row represents one Task
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# The columns hold the Tasks parameters
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# column 0 is period P,
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# column 1 is deadline D
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# column 2 is WCET C
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# P_i is accessed as: tasks[i][0]
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# D_i is accessed as: tasks[i][1]
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# C_i is accessed as: tasks[i][2]
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# The number of tasks can be accessed as: tasks.shape[0]
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#The sufficient Test for the Hyperbolic bound
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def test(tasks):
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""" The Hyperbolic bound is given as Π(U + 1) of all tasks: """
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# compute the hyperbolic bound as product of the U_factor of each task + 1
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hb = 1
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for i in range(tasks.shape[0]): # len(tasks) is 10
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hb *= (TH.C_i(tasks, i) / TH.P_i(tasks, i)) + 1
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# compare this computed bound to 2.0
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# if greater then no guaranty of schedulability
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# otherwise task set is schedulable
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return hb <= 2.0
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