yartiss.engine.simulation.system

Class PeriodicTask

java.lang.Object

yartiss.engine.simulation.system.AbstractTask

yartiss.engine.simulation.system.PeriodicTask

All Implemented Interfaces:

ITask

Direct Known Subclasses:

GraphTask, SimpleTask, SubTask

public abstract class PeriodicTask
extends AbstractTask

Author:

Frederic Fauberteau & Manar Qamhieh

Field Summary

Fields inherited from class yartiss.engine.simulation.system.AbstractTask

consumptionProfile

Constructor Summary

Constructors

Constructor and Description
PeriodicTask(long firstRelease, long wcet, long wcee, long period, long deadline, int priority, IEnergyConsumptionProfile p)

Method Summary

Methods

Modifier and Type	Method and Description
double	getDensity() Calculates the density of the task, where density = WCET/(min(P,d))
double	getUtilization() Calculates the utilization of the task, where U = WCET/T
boolean	isArbitraryDeadline() Checks if the task is an arbitrary-deadline task
boolean	isConstrainedDeadline() Checks if the task is a constrained-deadline task, in which the deadline less or equals to its period
boolean	isImplicitDeadline() Checks if the task is an implicit-deadline task, in which the deadline equals to its period

Methods inherited from class yartiss.engine.simulation.system.AbstractTask

activate, checkDeadlineMissed, getActiveJobs, getCurrentJob, getDeadline, getEnergyConsumption, getEnergyConsumptionProfile, getEnergyConsumptionRate, getFirstRelease, getId, getLastExecutedJob, getNextAbsoluteDeadline, getNextActivation, getNextDeadline, getPeriod, getPreviousAbsoluteDeadline, getPriority, getRemainingCost, getType, getWcee, getWcet, isActivationTime, isActive, lastExecutedJobHasCompleted, setEnergyConsumptionProfile, setFirstRelease, setId, setLastExecutedJob, setPriority

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface yartiss.engine.simulation.system.ITask

cloneTask, getLaxity

Constructor Detail

PeriodicTask

public PeriodicTask(long firstRelease,
            long wcet,
            long wcee,
            long period,
            long deadline,
            int priority,
            IEnergyConsumptionProfile p)

Method Detail

getUtilization

public double getUtilization()

Calculates the utilization of the task, where U = WCET/T

Returns:

task's utilization

getDensity

public double getDensity()

Calculates the density of the task, where density = WCET/(min(P,d))

Returns:

task's density

isImplicitDeadline

public boolean isImplicitDeadline()

Checks if the task is an implicit-deadline task, in which the deadline equals to its period

Returns:

true if it is an implicit-deadline task, false otherwise

isConstrainedDeadline

public boolean isConstrainedDeadline()

Checks if the task is a constrained-deadline task, in which the deadline less or equals to its period

Returns:

true if it is a constrained-deadline task, false otherwise

isArbitraryDeadline

public boolean isArbitraryDeadline()

Checks if the task is an arbitrary-deadline task

Returns:

true if it is an arbitrary-deadline task, false otherwise