546 lines
14 KiB
Java
546 lines
14 KiB
Java
/*
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* Title: CloudSim Toolkit Description: CloudSim (Cloud Simulation) Toolkit for Modeling and
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* Simulation of Clouds Licence: GPL - http://www.gnu.org/copyleft/gpl.html
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*
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* Copyright (c) 2009-2012, The University of Melbourne, Australia
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*/
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package org.cloudbus.cloudsim;
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import java.util.ArrayList;
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import java.util.List;
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import org.cloudbus.cloudsim.core.CloudSim;
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import org.fog.entities.Tuple;
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/**
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* CloudletSchedulerTimeShared implements a policy of scheduling performed by a virtual machine.
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* Cloudlets execute time-shared in VM.
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*
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* @author Rodrigo N. Calheiros
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* @author Anton Beloglazov
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* @since CloudSim Toolkit 1.0
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*/
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public class CloudletSchedulerTimeShared extends CloudletScheduler {
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/** The cloudlet exec list. */
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private List<? extends ResCloudlet> cloudletExecList;
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/** The cloudlet paused list. */
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private List<? extends ResCloudlet> cloudletPausedList;
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/** The cloudlet finished list. */
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private List<? extends ResCloudlet> cloudletFinishedList;
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/** The current cp us. */
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protected int currentCPUs;
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/**
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* Creates a new CloudletSchedulerTimeShared object. This method must be invoked before starting
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* the actual simulation.
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*
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* @pre $none
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* @post $none
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*/
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public CloudletSchedulerTimeShared() {
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super();
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cloudletExecList = new ArrayList<ResCloudlet>();
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cloudletPausedList = new ArrayList<ResCloudlet>();
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cloudletFinishedList = new ArrayList<ResCloudlet>();
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currentCPUs = 0;
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}
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/**
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* Updates the processing of cloudlets running under management of this scheduler.
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*
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* @param currentTime current simulation time
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* @param mipsShare array with MIPS share of each processor available to the scheduler
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* @return time predicted completion time of the earliest finishing cloudlet, or 0 if there is
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* no next events
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* @pre currentTime >= 0
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* @post $none
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*/
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@Override
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public double updateVmProcessing(double currentTime, List<Double> mipsShare) {
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setCurrentMipsShare(mipsShare);
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double timeSpam = currentTime - getPreviousTime();
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for (ResCloudlet rcl : getCloudletExecList()) {
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rcl.updateCloudletFinishedSoFar((long) (getCapacity(mipsShare) * timeSpam * rcl.getNumberOfPes() * Consts.MILLION));
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//System.out.println(getTotalCurrentAllocatedMipsForCloudlet(rcl, getPreviousTime()));
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//OLA System.out.println(CloudSim.clock()+ " : Remaining length of tuple ID "+((Tuple)rcl.getCloudlet()).getActualTupleId()+" = "+rcl.getRemainingCloudletLength());
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}
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if (getCloudletExecList().size() == 0) {
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setPreviousTime(currentTime);
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return 0.0;
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}
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// check finished cloudlets
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double nextEvent = Double.MAX_VALUE;
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List<ResCloudlet> toRemove = new ArrayList<ResCloudlet>();
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for (ResCloudlet rcl : getCloudletExecList()) {
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long remainingLength = rcl.getRemainingCloudletLength();
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if (remainingLength == 0) {// finished: remove from the list
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toRemove.add(rcl);
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cloudletFinish(rcl);
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continue;
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}
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}
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getCloudletExecList().removeAll(toRemove);
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// estimate finish time of cloudlets
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for (ResCloudlet rcl : getCloudletExecList()) {
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double estimatedFinishTime = currentTime
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+ (rcl.getRemainingCloudletLength() / (getCapacity(mipsShare) * rcl.getNumberOfPes()));
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if (estimatedFinishTime - currentTime < CloudSim.getMinTimeBetweenEvents()) {
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estimatedFinishTime = currentTime + CloudSim.getMinTimeBetweenEvents();
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}
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if (estimatedFinishTime < nextEvent) {
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nextEvent = estimatedFinishTime;
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}
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}
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setPreviousTime(currentTime);
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return nextEvent;
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}
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/**
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* Gets the capacity.
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*
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* @param mipsShare the mips share
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* @return the capacity
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*/
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protected double getCapacity(List<Double> mipsShare) {
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double capacity = 0.0;
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int cpus = 0;
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for (Double mips : mipsShare) {
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capacity += mips;
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if (mips > 0.0) {
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cpus++;
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}
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}
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currentCPUs = cpus;
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int pesInUse = 0;
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for (ResCloudlet rcl : getCloudletExecList()) {
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pesInUse += rcl.getNumberOfPes();
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}
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if (pesInUse > currentCPUs) {
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capacity /= pesInUse;
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} else {
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capacity /= currentCPUs;
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}
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return capacity;
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}
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/**
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* Cancels execution of a cloudlet.
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*
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* @param cloudletId ID of the cloudlet being cancealed
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* @return the canceled cloudlet, $null if not found
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* @pre $none
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* @post $none
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*/
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@Override
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public Cloudlet cloudletCancel(int cloudletId) {
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boolean found = false;
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int position = 0;
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// First, looks in the finished queue
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found = false;
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for (ResCloudlet rcl : getCloudletFinishedList()) {
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if (rcl.getCloudletId() == cloudletId) {
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found = true;
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break;
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}
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position++;
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}
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if (found) {
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return getCloudletFinishedList().remove(position).getCloudlet();
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}
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// Then searches in the exec list
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position=0;
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for (ResCloudlet rcl : getCloudletExecList()) {
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if (rcl.getCloudletId() == cloudletId) {
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found = true;
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break;
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}
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position++;
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}
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if (found) {
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ResCloudlet rcl = getCloudletExecList().remove(position);
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if (rcl.getRemainingCloudletLength() == 0) {
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cloudletFinish(rcl);
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} else {
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rcl.setCloudletStatus(Cloudlet.CANCELED);
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}
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return rcl.getCloudlet();
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}
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// Now, looks in the paused queue
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found = false;
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position=0;
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for (ResCloudlet rcl : getCloudletPausedList()) {
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if (rcl.getCloudletId() == cloudletId) {
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found = true;
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rcl.setCloudletStatus(Cloudlet.CANCELED);
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break;
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}
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position++;
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}
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if (found) {
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return getCloudletPausedList().remove(position).getCloudlet();
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}
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return null;
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}
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/**
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* Pauses execution of a cloudlet.
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*
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* @param cloudletId ID of the cloudlet being paused
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* @return $true if cloudlet paused, $false otherwise
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* @pre $none
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* @post $none
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*/
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@Override
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public boolean cloudletPause(int cloudletId) {
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boolean found = false;
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int position = 0;
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for (ResCloudlet rcl : getCloudletExecList()) {
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if (rcl.getCloudletId() == cloudletId) {
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found = true;
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break;
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}
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position++;
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}
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if (found) {
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// remove cloudlet from the exec list and put it in the paused list
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ResCloudlet rcl = getCloudletExecList().remove(position);
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if (rcl.getRemainingCloudletLength() == 0) {
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cloudletFinish(rcl);
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} else {
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rcl.setCloudletStatus(Cloudlet.PAUSED);
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getCloudletPausedList().add(rcl);
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}
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return true;
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}
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return false;
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}
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/**
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* Processes a finished cloudlet.
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*
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* @param rcl finished cloudlet
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* @pre rgl != $null
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* @post $none
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*/
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@Override
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public void cloudletFinish(ResCloudlet rcl) {
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rcl.setCloudletStatus(Cloudlet.SUCCESS);
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rcl.finalizeCloudlet();
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getCloudletFinishedList().add(rcl);
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}
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/**
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* Resumes execution of a paused cloudlet.
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*
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* @param cloudletId ID of the cloudlet being resumed
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* @return expected finish time of the cloudlet, 0.0 if queued
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* @pre $none
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* @post $none
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*/
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@Override
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public double cloudletResume(int cloudletId) {
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boolean found = false;
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int position = 0;
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// look for the cloudlet in the paused list
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for (ResCloudlet rcl : getCloudletPausedList()) {
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if (rcl.getCloudletId() == cloudletId) {
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found = true;
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break;
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}
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position++;
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}
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if (found) {
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ResCloudlet rgl = getCloudletPausedList().remove(position);
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rgl.setCloudletStatus(Cloudlet.INEXEC);
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getCloudletExecList().add(rgl);
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// calculate the expected time for cloudlet completion
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// first: how many PEs do we have?
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double remainingLength = rgl.getRemainingCloudletLength();
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double estimatedFinishTime = CloudSim.clock()
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+ (remainingLength / (getCapacity(getCurrentMipsShare()) * rgl.getNumberOfPes()));
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return estimatedFinishTime;
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}
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return 0.0;
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}
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/**
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* Receives an cloudlet to be executed in the VM managed by this scheduler.
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*
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* @param cloudlet the submited cloudlet
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* @param fileTransferTime time required to move the required files from the SAN to the VM
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* @return expected finish time of this cloudlet
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* @pre gl != null
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* @post $none
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*/
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@Override
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public double cloudletSubmit(Cloudlet cloudlet, double fileTransferTime) {
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ResCloudlet rcl = new ResCloudlet(cloudlet);
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rcl.setCloudletStatus(Cloudlet.INEXEC);
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for (int i = 0; i < cloudlet.getNumberOfPes(); i++) {
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rcl.setMachineAndPeId(0, i);
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}
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getCloudletExecList().add(rcl);
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// use the current capacity to estimate the extra amount of
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// time to file transferring. It must be added to the cloudlet length
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double extraSize = getCapacity(getCurrentMipsShare()) * fileTransferTime;
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long length = (long) (cloudlet.getCloudletLength() + extraSize);
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cloudlet.setCloudletLength(length);
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return cloudlet.getCloudletLength() / getCapacity(getCurrentMipsShare());
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}
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/*
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* (non-Javadoc)
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* @see cloudsim.CloudletScheduler#cloudletSubmit(cloudsim.Cloudlet)
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*/
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@Override
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public double cloudletSubmit(Cloudlet cloudlet) {
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return cloudletSubmit(cloudlet, 0.0);
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}
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/**
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* Gets the status of a cloudlet.
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*
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* @param cloudletId ID of the cloudlet
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* @return status of the cloudlet, -1 if cloudlet not found
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* @pre $none
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* @post $none
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*/
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@Override
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public int getCloudletStatus(int cloudletId) {
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for (ResCloudlet rcl : getCloudletExecList()) {
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if (rcl.getCloudletId() == cloudletId) {
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return rcl.getCloudletStatus();
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}
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}
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for (ResCloudlet rcl : getCloudletPausedList()) {
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if (rcl.getCloudletId() == cloudletId) {
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return rcl.getCloudletStatus();
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}
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}
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return -1;
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}
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/**
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* Get utilization created by all cloudlets.
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*
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* @param time the time
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* @return total utilization
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*/
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@Override
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public double getTotalUtilizationOfCpu(double time) {
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double totalUtilization = 0;
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for (ResCloudlet gl : getCloudletExecList()) {
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totalUtilization += gl.getCloudlet().getUtilizationOfCpu(time);
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}
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return totalUtilization;
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}
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/**
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* Informs about completion of some cloudlet in the VM managed by this scheduler.
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*
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* @return $true if there is at least one finished cloudlet; $false otherwise
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* @pre $none
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* @post $none
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*/
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@Override
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public boolean isFinishedCloudlets() {
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return getCloudletFinishedList().size() > 0;
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}
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/**
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* Returns the next cloudlet in the finished list, $null if this list is empty.
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*
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* @return a finished cloudlet
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* @pre $none
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* @post $none
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*/
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@Override
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public Cloudlet getNextFinishedCloudlet() {
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if (getCloudletFinishedList().size() > 0) {
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return getCloudletFinishedList().remove(0).getCloudlet();
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}
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return null;
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}
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/**
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* Returns the number of cloudlets runnning in the virtual machine.
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*
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* @return number of cloudlets runnning
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* @pre $none
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* @post $none
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*/
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@Override
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public int runningCloudlets() {
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return getCloudletExecList().size();
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}
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/**
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* Returns one cloudlet to migrate to another vm.
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*
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* @return one running cloudlet
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* @pre $none
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* @post $none
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*/
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@Override
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public Cloudlet migrateCloudlet() {
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ResCloudlet rgl = getCloudletExecList().remove(0);
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rgl.finalizeCloudlet();
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return rgl.getCloudlet();
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}
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/**
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* Gets the cloudlet exec list.
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*
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* @param <T> the generic type
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* @return the cloudlet exec list
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*/
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@SuppressWarnings("unchecked")
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protected <T extends ResCloudlet> List<T> getCloudletExecList() {
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return (List<T>) cloudletExecList;
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}
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/**
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* Sets the cloudlet exec list.
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*
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* @param <T> the generic type
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* @param cloudletExecList the new cloudlet exec list
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*/
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protected <T extends ResCloudlet> void setCloudletExecList(List<T> cloudletExecList) {
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this.cloudletExecList = cloudletExecList;
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}
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/**
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* Gets the cloudlet paused list.
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*
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* @param <T> the generic type
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* @return the cloudlet paused list
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*/
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@SuppressWarnings("unchecked")
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protected <T extends ResCloudlet> List<T> getCloudletPausedList() {
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return (List<T>) cloudletPausedList;
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}
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/**
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* Sets the cloudlet paused list.
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*
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* @param <T> the generic type
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* @param cloudletPausedList the new cloudlet paused list
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*/
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protected <T extends ResCloudlet> void setCloudletPausedList(List<T> cloudletPausedList) {
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this.cloudletPausedList = cloudletPausedList;
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}
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/**
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* Gets the cloudlet finished list.
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*
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* @param <T> the generic type
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* @return the cloudlet finished list
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*/
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@SuppressWarnings("unchecked")
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protected <T extends ResCloudlet> List<T> getCloudletFinishedList() {
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return (List<T>) cloudletFinishedList;
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}
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/**
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* Sets the cloudlet finished list.
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*
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* @param <T> the generic type
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* @param cloudletFinishedList the new cloudlet finished list
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*/
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protected <T extends ResCloudlet> void setCloudletFinishedList(List<T> cloudletFinishedList) {
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this.cloudletFinishedList = cloudletFinishedList;
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}
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/*
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* (non-Javadoc)
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* @see cloudsim.CloudletScheduler#getCurrentRequestedMips()
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*/
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@Override
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public List<Double> getCurrentRequestedMips() {
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List<Double> mipsShare = new ArrayList<Double>();
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return mipsShare;
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}
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/*
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* (non-Javadoc)
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* @see cloudsim.CloudletScheduler#getTotalCurrentAvailableMipsForCloudlet(cloudsim.ResCloudlet,
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* java.util.List)
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*/
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@Override
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public double getTotalCurrentAvailableMipsForCloudlet(ResCloudlet rcl, List<Double> mipsShare) {
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return getCapacity(getCurrentMipsShare());
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}
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/*
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* (non-Javadoc)
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* @see cloudsim.CloudletScheduler#getTotalCurrentAllocatedMipsForCloudlet(cloudsim.ResCloudlet,
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* double)
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*/
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@Override
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public double getTotalCurrentAllocatedMipsForCloudlet(ResCloudlet rcl, double time) {
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return 0.0;
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}
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/*
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* (non-Javadoc)
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* @see cloudsim.CloudletScheduler#getTotalCurrentRequestedMipsForCloudlet(cloudsim.ResCloudlet,
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* double)
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*/
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@Override
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public double getTotalCurrentRequestedMipsForCloudlet(ResCloudlet rcl, double time) {
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// TODO Auto-generated method stub
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return 0.0;
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}
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@Override
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public double getCurrentRequestedUtilizationOfRam() {
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double ram = 0;
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for (ResCloudlet cloudlet : cloudletExecList) {
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ram += cloudlet.getCloudlet().getUtilizationOfRam(CloudSim.clock());
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}
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return ram;
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}
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@Override
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public double getCurrentRequestedUtilizationOfBw() {
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double bw = 0;
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for (ResCloudlet cloudlet : cloudletExecList) {
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bw += cloudlet.getCloudlet().getUtilizationOfBw(CloudSim.clock());
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}
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return bw;
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}
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}
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