669 lines
17 KiB
Java
669 lines
17 KiB
Java
/*
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* Title: CloudSim Toolkit
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* Description: CloudSim (Cloud Simulation) Toolkit for Modeling and Simulation of Clouds
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* 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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/**
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* CloudletSchedulerSpaceShared implements a policy of scheduling performed by a virtual machine. It
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* consider that there will be only one cloudlet per VM. Other cloudlets will be in a waiting list.
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* We consider that file transfer from cloudlets waiting happens before cloudlet execution. I.e.,
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* even though cloudlets must wait for CPU, data transfer happens as soon as cloudlets are
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* submitted.
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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 CloudletSchedulerSpaceShared extends CloudletScheduler {
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/** The cloudlet waiting list. */
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private List<? extends ResCloudlet> cloudletWaitingList;
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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 CPUs. */
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protected int currentCpus;
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/** The used PEs. */
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protected int usedPes;
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/**
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* Creates a new CloudletSchedulerSpaceShared object. This method must be invoked before
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* starting 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 CloudletSchedulerSpaceShared() {
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super();
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cloudletWaitingList = new ArrayList<ResCloudlet>();
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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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usedPes = 0;
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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(); // time since last update
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double capacity = 0.0;
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int cpus = 0;
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for (Double mips : mipsShare) { // count the CPUs available to the VMM
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capacity += mips;
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if (mips > 0) {
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cpus++;
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}
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}
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currentCpus = cpus;
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capacity /= cpus; // average capacity of each cpu
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// each machine in the exec list has the same amount of cpu
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for (ResCloudlet rcl : getCloudletExecList()) {
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rcl.updateCloudletFinishedSoFar((long) (capacity * timeSpam * rcl.getNumberOfPes() * Consts.MILLION));
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}
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// no more cloudlets in this scheduler
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if (getCloudletExecList().size() == 0 && getCloudletWaitingList().size() == 0) {
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setPreviousTime(currentTime);
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return 0.0;
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}
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// update each cloudlet
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int finished = 0;
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List<ResCloudlet> toRemove = new ArrayList<ResCloudlet>();
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for (ResCloudlet rcl : getCloudletExecList()) {
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// finished anyway, rounding issue...
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if (rcl.getRemainingCloudletLength() == 0) {
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toRemove.add(rcl);
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cloudletFinish(rcl);
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finished++;
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}
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}
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getCloudletExecList().removeAll(toRemove);
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// for each finished cloudlet, add a new one from the waiting list
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if (!getCloudletWaitingList().isEmpty()) {
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for (int i = 0; i < finished; i++) {
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toRemove.clear();
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for (ResCloudlet rcl : getCloudletWaitingList()) {
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if ((currentCpus - usedPes) >= rcl.getNumberOfPes()) {
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rcl.setCloudletStatus(Cloudlet.INEXEC);
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for (int k = 0; k < rcl.getNumberOfPes(); k++) {
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rcl.setMachineAndPeId(0, i);
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}
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getCloudletExecList().add(rcl);
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usedPes += rcl.getNumberOfPes();
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toRemove.add(rcl);
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break;
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}
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}
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getCloudletWaitingList().removeAll(toRemove);
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}
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}
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// estimate finish time of cloudlets in the execution queue
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double nextEvent = Double.MAX_VALUE;
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for (ResCloudlet rcl : getCloudletExecList()) {
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double remainingLength = rcl.getRemainingCloudletLength();
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double estimatedFinishTime = currentTime + (remainingLength / (capacity * 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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* 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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// First, looks in the finished queue
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for (ResCloudlet rcl : getCloudletFinishedList()) {
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if (rcl.getCloudletId() == cloudletId) {
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getCloudletFinishedList().remove(rcl);
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return rcl.getCloudlet();
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}
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}
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// Then searches in the exec list
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for (ResCloudlet rcl : getCloudletExecList()) {
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if (rcl.getCloudletId() == cloudletId) {
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getCloudletExecList().remove(rcl);
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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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}
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// Now, looks in the paused queue
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for (ResCloudlet rcl : getCloudletPausedList()) {
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if (rcl.getCloudletId() == cloudletId) {
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getCloudletPausedList().remove(rcl);
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return rcl.getCloudlet();
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}
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}
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// Finally, looks in the waiting list
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for (ResCloudlet rcl : getCloudletWaitingList()) {
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if (rcl.getCloudletId() == cloudletId) {
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rcl.setCloudletStatus(Cloudlet.CANCELED);
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getCloudletWaitingList().remove(rcl);
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return rcl.getCloudlet();
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}
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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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// first, looks for the cloudlet in the exec list
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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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// moves to the paused list
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ResCloudlet rgl = getCloudletExecList().remove(position);
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if (rgl.getRemainingCloudletLength() == 0) {
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cloudletFinish(rgl);
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} else {
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rgl.setCloudletStatus(Cloudlet.PAUSED);
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getCloudletPausedList().add(rgl);
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}
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return true;
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}
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// now, look for the cloudlet in the waiting list
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position = 0;
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found = false;
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for (ResCloudlet rcl : getCloudletWaitingList()) {
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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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// moves to the paused list
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ResCloudlet rgl = getCloudletWaitingList().remove(position);
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if (rgl.getRemainingCloudletLength() == 0) {
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cloudletFinish(rgl);
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} else {
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rgl.setCloudletStatus(Cloudlet.PAUSED);
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getCloudletPausedList().add(rgl);
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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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usedPes -= rcl.getNumberOfPes();
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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 $true if the cloudlet was resumed, $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 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 rcl = getCloudletPausedList().remove(position);
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// it can go to the exec list
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if ((currentCpus - usedPes) >= rcl.getNumberOfPes()) {
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rcl.setCloudletStatus(Cloudlet.INEXEC);
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for (int i = 0; i < rcl.getNumberOfPes(); i++) {
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rcl.setMachineAndPeId(0, i);
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}
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long size = rcl.getRemainingCloudletLength();
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size *= rcl.getNumberOfPes();
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rcl.getCloudlet().setCloudletLength(size);
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getCloudletExecList().add(rcl);
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usedPes += rcl.getNumberOfPes();
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// calculate the expected time for cloudlet completion
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double capacity = 0.0;
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int cpus = 0;
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for (Double mips : getCurrentMipsShare()) {
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capacity += mips;
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if (mips > 0) {
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cpus++;
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}
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}
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currentCpus = cpus;
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capacity /= cpus;
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long remainingLength = rcl.getRemainingCloudletLength();
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double estimatedFinishTime = CloudSim.clock()
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+ (remainingLength / (capacity * rcl.getNumberOfPes()));
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return estimatedFinishTime;
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} else {// no enough free PEs: go to the waiting queue
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rcl.setCloudletStatus(Cloudlet.QUEUED);
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long size = rcl.getRemainingCloudletLength();
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size *= rcl.getNumberOfPes();
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rcl.getCloudlet().setCloudletLength(size);
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getCloudletWaitingList().add(rcl);
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return 0.0;
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}
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}
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// not found in the paused list: either it is in in the queue, executing or not exist
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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, or 0 if it is in the waiting queue
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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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// it can go to the exec list
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if ((currentCpus - usedPes) >= cloudlet.getNumberOfPes()) {
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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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usedPes += cloudlet.getNumberOfPes();
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} else {// no enough free PEs: go to the waiting queue
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ResCloudlet rcl = new ResCloudlet(cloudlet);
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rcl.setCloudletStatus(Cloudlet.QUEUED);
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getCloudletWaitingList().add(rcl);
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return 0.0;
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}
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// calculate the expected time for cloudlet completion
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double capacity = 0.0;
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int cpus = 0;
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for (Double mips : getCurrentMipsShare()) {
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capacity += mips;
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if (mips > 0) {
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cpus++;
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}
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}
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currentCpus = cpus;
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capacity /= cpus;
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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 = capacity * fileTransferTime;
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long length = cloudlet.getCloudletLength();
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length += extraSize;
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cloudlet.setCloudletLength(length);
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return cloudlet.getCloudletLength() / capacity;
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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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for (ResCloudlet rcl : getCloudletWaitingList()) {
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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 rcl = getCloudletExecList().remove(0);
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rcl.finalizeCloudlet();
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Cloudlet cl = rcl.getCloudlet();
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usedPes -= cl.getNumberOfPes();
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return cl;
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}
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/**
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* Gets the cloudlet waiting list.
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*
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* @param <T> the generic type
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* @return the cloudlet waiting list
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*/
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@SuppressWarnings("unchecked")
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protected <T extends ResCloudlet> List<T> getCloudletWaitingList() {
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return (List<T>) cloudletWaitingList;
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}
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|
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/**
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* Cloudlet waiting list.
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*
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* @param <T> the generic type
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* @param cloudletWaitingList the cloudlet waiting list
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*/
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protected <T extends ResCloudlet> void cloudletWaitingList(List<T> cloudletWaitingList) {
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this.cloudletWaitingList = cloudletWaitingList;
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}
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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) {
|
|
this.cloudletExecList = cloudletExecList;
|
|
}
|
|
|
|
/**
|
|
* Gets the cloudlet paused list.
|
|
*
|
|
* @param <T> the generic type
|
|
* @return the cloudlet paused list
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
protected <T extends ResCloudlet> List<T> getCloudletPausedList() {
|
|
return (List<T>) cloudletPausedList;
|
|
}
|
|
|
|
/**
|
|
* Sets the cloudlet paused list.
|
|
*
|
|
* @param <T> the generic type
|
|
* @param cloudletPausedList the new cloudlet paused list
|
|
*/
|
|
protected <T extends ResCloudlet> void setCloudletPausedList(List<T> cloudletPausedList) {
|
|
this.cloudletPausedList = cloudletPausedList;
|
|
}
|
|
|
|
/**
|
|
* Gets the cloudlet finished list.
|
|
*
|
|
* @param <T> the generic type
|
|
* @return the cloudlet finished list
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
protected <T extends ResCloudlet> List<T> getCloudletFinishedList() {
|
|
return (List<T>) cloudletFinishedList;
|
|
}
|
|
|
|
/**
|
|
* Sets the cloudlet finished list.
|
|
*
|
|
* @param <T> the generic type
|
|
* @param cloudletFinishedList the new cloudlet finished list
|
|
*/
|
|
protected <T extends ResCloudlet> void setCloudletFinishedList(List<T> cloudletFinishedList) {
|
|
this.cloudletFinishedList = cloudletFinishedList;
|
|
}
|
|
|
|
/*
|
|
* (non-Javadoc)
|
|
* @see org.cloudbus.cloudsim.CloudletScheduler#getCurrentRequestedMips()
|
|
*/
|
|
@Override
|
|
public List<Double> getCurrentRequestedMips() {
|
|
List<Double> mipsShare = new ArrayList<Double>();
|
|
if (getCurrentMipsShare() != null) {
|
|
for (Double mips : getCurrentMipsShare()) {
|
|
mipsShare.add(mips);
|
|
}
|
|
}
|
|
return mipsShare;
|
|
}
|
|
|
|
/*
|
|
* (non-Javadoc)
|
|
* @see
|
|
* org.cloudbus.cloudsim.CloudletScheduler#getTotalCurrentAvailableMipsForCloudlet(org.cloudbus
|
|
* .cloudsim.ResCloudlet, java.util.List)
|
|
*/
|
|
@Override
|
|
public double getTotalCurrentAvailableMipsForCloudlet(ResCloudlet rcl, List<Double> mipsShare) {
|
|
double capacity = 0.0;
|
|
int cpus = 0;
|
|
for (Double mips : mipsShare) { // count the cpus available to the vmm
|
|
capacity += mips;
|
|
if (mips > 0) {
|
|
cpus++;
|
|
}
|
|
}
|
|
currentCpus = cpus;
|
|
capacity /= cpus; // average capacity of each cpu
|
|
return capacity;
|
|
}
|
|
|
|
/*
|
|
* (non-Javadoc)
|
|
* @see
|
|
* org.cloudbus.cloudsim.CloudletScheduler#getTotalCurrentAllocatedMipsForCloudlet(org.cloudbus
|
|
* .cloudsim.ResCloudlet, double)
|
|
*/
|
|
@Override
|
|
public double getTotalCurrentAllocatedMipsForCloudlet(ResCloudlet rcl, double time) {
|
|
// TODO Auto-generated method stub
|
|
return 0.0;
|
|
}
|
|
|
|
/*
|
|
* (non-Javadoc)
|
|
* @see
|
|
* org.cloudbus.cloudsim.CloudletScheduler#getTotalCurrentRequestedMipsForCloudlet(org.cloudbus
|
|
* .cloudsim.ResCloudlet, double)
|
|
*/
|
|
@Override
|
|
public double getTotalCurrentRequestedMipsForCloudlet(ResCloudlet rcl, double time) {
|
|
// TODO Auto-generated method stub
|
|
return 0.0;
|
|
}
|
|
|
|
@Override
|
|
public double getCurrentRequestedUtilizationOfRam() {
|
|
// TODO Auto-generated method stub
|
|
return 0;
|
|
}
|
|
|
|
@Override
|
|
public double getCurrentRequestedUtilizationOfBw() {
|
|
// TODO Auto-generated method stub
|
|
return 0;
|
|
}
|
|
|
|
}
|