/**
* Processes a finished cloudlet.
*
* @param rcl finished cloudlet
* @pre rgl != $null
* @post $none
*/
@Override
public void cloudletFinish(ResCloudlet rcl) {
rcl.setCloudletStatus(Cloudlet.SUCCESS);
rcl.finalizeCloudlet();
getCloudletFinishedList().add(rcl);
usedPes -= rcl.getPesNumber();
}
/**
* Updates the processing of cloudlets running under management of this scheduler.
*
* @param currentTime current simulation time
* @param mipsShare array with MIPS share of each processor available to the scheduler
* @return time predicted completion time of the earliest finishing cloudlet, or 0 if there is no
* next events
* @pre currentTime >= 0
* @post $none
*/
@Override
public double updateVmProcessing(double currentTime, List<Double> mipsShare) {
setCurrentMipsShare(mipsShare);
double timeSpam = currentTime - getPreviousTime(); // time since last update
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
for (ResCloudlet rcl :
getCloudletExecList()) { // each machine in the exec list has the same amount of cpu
rcl.updateCloudletFinishedSoFar((long) (capacity * timeSpam * rcl.getPesNumber()));
}
if (getCloudletExecList().size() == 0
&& getCloudletWaitingList().size() == 0) { // no more cloudlets in this scheduler
setPreviousTime(currentTime);
return 0.0;
}
// update each cloudlet
int finished = 0;
int cont = 0;
List<ResCloudlet> toRemove = new ArrayList<ResCloudlet>();
for (ResCloudlet rcl : getCloudletExecList()) {
if (rcl.getRemainingCloudletLength() == 0.0) { // finished anyway, rounding issue...
toRemove.add(rcl);
cloudletFinish(rcl);
finished++;
}
cont++;
}
getCloudletExecList().removeAll(toRemove);
// for each finished cloudlet, add a new one from the waiting list
if (!getCloudletWaitingList().isEmpty()) {
for (int i = 0; i < finished; i++) {
toRemove.clear();
for (ResCloudlet rcl : getCloudletWaitingList()) {
if ((currentCpus - usedPes) >= rcl.getPesNumber()) {
rcl.setCloudletStatus(Cloudlet.INEXEC);
for (int k = 0; k < rcl.getPesNumber(); k++) {
rcl.setMachineAndPeId(0, i);
}
getCloudletExecList().add(rcl);
usedPes += rcl.getPesNumber();
toRemove.add(rcl);
break;
}
}
getCloudletWaitingList().removeAll(toRemove);
} // for(cont)
}
// estimate finish time of cloudlets in the execution queue
double nextEvent = Double.MAX_VALUE;
for (ResCloudlet rcl : getCloudletExecList()) {
double remainingLength = rcl.getRemainingCloudletLength();
double estimatedFinishTime =
currentTime + (remainingLength / (capacity * rcl.getPesNumber()));
if (estimatedFinishTime - currentTime < 0.1) {
estimatedFinishTime = currentTime + 0.1;
}
if (estimatedFinishTime < nextEvent) {
nextEvent = estimatedFinishTime;
}
}
setPreviousTime(currentTime);
return nextEvent;
}
/**
* Resumes execution of a paused cloudlet.
*
* @param cloudletId ID of the cloudlet being resumed
* @return $true if the cloudlet was resumed, $false otherwise
* @pre $none
* @post $none
*/
@Override
public double cloudletResume(int cloudletId) {
boolean found = false;
int position = 0;
// look for the cloudlet in the paused list
for (ResCloudlet rcl : getCloudletPausedList()) {
if (rcl.getCloudletId() == cloudletId) {
found = true;
break;
}
position++;
}
if (found) {
ResCloudlet rcl = getCloudletPausedList().remove(position);
if ((currentCpus - usedPes) >= rcl.getPesNumber()) { // it can go to the exec list
rcl.setCloudletStatus(Cloudlet.INEXEC);
for (int i = 0; i < rcl.getPesNumber(); i++) {
rcl.setMachineAndPeId(0, i);
}
long size = rcl.getRemainingCloudletLength();
size *= rcl.getPesNumber();
rcl.getCloudlet().setCloudletLength(size);
getCloudletExecList().add(rcl);
usedPes += rcl.getPesNumber();
// calculate the expected time for cloudlet completion
double capacity = 0.0;
int cpus = 0;
for (Double mips : getCurrentMipsShare()) {
capacity += mips;
if (mips > 0) {
cpus++;
}
}
currentCpus = cpus;
capacity /= cpus;
long remainingLength = rcl.getRemainingCloudletLength();
double estimatedFinishTime =
CloudSim.clock() + (remainingLength / (capacity * rcl.getPesNumber()));
return estimatedFinishTime;
} else { // no enough free PEs: go to the waiting queue
rcl.setCloudletStatus(Cloudlet.QUEUED);
long size = rcl.getRemainingCloudletLength();
size *= rcl.getPesNumber();
rcl.getCloudlet().setCloudletLength(size);
getCloudletWaitingList().add(rcl);
return 0.0;
}
}
// not found in the paused list: either it is in in the queue, executing or not exist
return 0.0;
}
