105 lines
4.1 KiB
Java
105 lines
4.1 KiB
Java
/*
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* Title: EdgeCloudSim - Idle/Active Load Generator implementation
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*
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* Description:
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* IdleActiveLoadGenerator implements basic load generator model where the
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* mobile devices generate task in active period and waits in idle period.
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* Task interarrival time (load generation period), Idle and active periods
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* are defined in the configuration file.
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*
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* Licence: GPL - http://www.gnu.org/copyleft/gpl.html
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* Copyright (c) 2017, Bogazici University, Istanbul, Turkey
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*/
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package edu.boun.edgecloudsim.task_generator;
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import java.util.ArrayList;
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import org.apache.commons.math3.distribution.ExponentialDistribution;
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import edu.boun.edgecloudsim.core.SimSettings;
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import edu.boun.edgecloudsim.utils.TaskProperty;
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import edu.boun.edgecloudsim.utils.SimLogger;
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import edu.boun.edgecloudsim.utils.SimUtils;
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public class IdleActiveLoadGenerator extends LoadGeneratorModel{
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int taskTypeOfDevices[];
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public IdleActiveLoadGenerator(int _numberOfMobileDevices, double _simulationTime, String _simScenario) {
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super(_numberOfMobileDevices, _simulationTime, _simScenario);
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}
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@Override
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public void initializeModel() {
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taskList = new ArrayList<TaskProperty>();
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//exponential number generator for file input size, file output size and task length
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ExponentialDistribution[][] expRngList = new ExponentialDistribution[SimSettings.getInstance().getTaskLookUpTable().length][3];
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//create random number generator for each place
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for(int i=0; i<SimSettings.getInstance().getTaskLookUpTable().length; i++) {
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if(SimSettings.getInstance().getTaskLookUpTable()[i][0] ==0)
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continue;
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expRngList[i][0] = new ExponentialDistribution(SimSettings.getInstance().getTaskLookUpTable()[i][5]);
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expRngList[i][1] = new ExponentialDistribution(SimSettings.getInstance().getTaskLookUpTable()[i][6]);
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expRngList[i][2] = new ExponentialDistribution(SimSettings.getInstance().getTaskLookUpTable()[i][7]);
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}
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//Each mobile device utilizes an app type (task type)
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taskTypeOfDevices = new int[numberOfMobileDevices];
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for(int i=0; i<numberOfMobileDevices; i++) {
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int randomTaskType = -1;
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double taskTypeSelector = SimUtils.getRandomDoubleNumber(0,100);
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double taskTypePercentage = 0;
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for (int j=0; j<SimSettings.getInstance().getTaskLookUpTable().length; j++) {
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taskTypePercentage += SimSettings.getInstance().getTaskLookUpTable()[j][0];
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if(taskTypeSelector <= taskTypePercentage){
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randomTaskType = j;
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break;
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}
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}
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if(randomTaskType == -1){
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SimLogger.printLine("Impossible is occurred! no random task type!");
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continue;
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}
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taskTypeOfDevices[i] = randomTaskType;
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double poissonMean = SimSettings.getInstance().getTaskLookUpTable()[randomTaskType][2];
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double activePeriod = SimSettings.getInstance().getTaskLookUpTable()[randomTaskType][3];
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double idlePeriod = SimSettings.getInstance().getTaskLookUpTable()[randomTaskType][4];
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double activePeriodStartTime = SimUtils.getRandomDoubleNumber(
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SimSettings.CLIENT_ACTIVITY_START_TIME,
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SimSettings.CLIENT_ACTIVITY_START_TIME + activePeriod); //active period starts shortly after the simulation started (e.g. 10 seconds)
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double virtualTime = activePeriodStartTime;
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ExponentialDistribution rng = new ExponentialDistribution(poissonMean);
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while(virtualTime < simulationTime) {
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double interval = rng.sample();
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if(interval <= 0){
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SimLogger.printLine("Impossible is occurred! interval is " + interval + " for device " + i + " time " + virtualTime);
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continue;
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}
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//SimLogger.printLine(virtualTime + " -> " + interval + " for device " + i + " time ");
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virtualTime += interval;
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if(virtualTime > activePeriodStartTime + activePeriod){
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activePeriodStartTime = activePeriodStartTime + activePeriod + idlePeriod;
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virtualTime = activePeriodStartTime;
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continue;
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}
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taskList.add(new TaskProperty(i,randomTaskType, virtualTime, expRngList));
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}
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}
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}
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@Override
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public int getTaskTypeOfDevice(int deviceId) {
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// TODO Auto-generated method stub
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return taskTypeOfDevices[deviceId];
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}
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}
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