/**
* Creates instances of CloudSim's Cloudlet class from a customer's utilization profile.
*
* @param ugr the utilization profile.
* @param brokerId the id of the broker that owns the cloudlets.
* @param numOfVms the number of virtual machines.
* @return a list of Cloudlet instances.
* @since 1.0
*/
static List<Cloudlet> createCloudlets(UtilizationProfile ugr, int brokerId, long numOfVms)
throws IOException, ServiceDeniedException {
List<Cloudlet> list = new ArrayList<Cloudlet>();
for (int i = 0; i < numOfVms; i++) {
Optional<UtilizationModel> cpu =
UTILIZATION_MODEL.getExtensionInstanceByName(ugr.getUtilizationModelCpuAlias());
if (!cpu.isPresent()) {
Dialog.showErrorMessage(
null,
format(
"Error on loading the CPU utilization model [%s]",
ugr.getUtilizationModelCpuAlias()));
return null;
}
Optional<UtilizationModel> ram =
UTILIZATION_MODEL.getExtensionInstanceByName(ugr.getUtilizationModelRamAlias());
if (!ram.isPresent()) {
Dialog.showErrorMessage(
null,
format(
"Error on loading the RAM utilization model [%s]",
ugr.getUtilizationModelRamAlias()));
return null;
}
Optional<UtilizationModel> bw =
UTILIZATION_MODEL.getExtensionInstanceByName(ugr.getUtilizationModelBwAlias());
if (!bw.isPresent()) {
Dialog.showErrorMessage(
null,
format(
"Error on loading the bandwidth utilization model [%s]",
ugr.getUtilizationModelBwAlias()));
return null;
}
Cloudlet cloudlet =
new Cloudlet(
i,
(long) ((long) ugr.getLength() * RandomNumberGenerator.getRandomNumbers(1).get(0)),
ugr.getCloudletsPesNumber(),
ugr.getFileSize(),
ugr.getOutputSize(),
cpu.get(),
ram.get(),
bw.get());
cloudlet.setUserId(brokerId);
cloudlet.setVmId(i);
list.add(cloudlet);
}
return list;
}
/**
* Returns one cloudlet to migrate to another vm.
*
* @return one running cloudlet
* @pre $none
* @post $none
*/
@Override
public Cloudlet migrateCloudlet() {
ResCloudlet rcl = getCloudletExecList().remove(0);
rcl.finalizeCloudlet();
Cloudlet cl = rcl.getCloudlet();
usedPes -= cl.getNumberOfPes();
return cl;
}
/**
* Receives an cloudlet to be executed in the VM managed by this scheduler.
*
* @param cloudlet the submited cloudlet
* @param fileTransferTime time required to move the required files from the SAN to the VM
* @return expected finish time of this cloudlet, or 0 if it is in the waiting queue
* @pre gl != null
* @post $none
*/
@Override
public double cloudletSubmit(Cloudlet cloudlet, double fileTransferTime) {
// it can go to the exec list
if ((currentCpus - usedPes) >= cloudlet.getNumberOfPes()) {
ResCloudlet rcl = new ResCloudlet(cloudlet);
rcl.setCloudletStatus(Cloudlet.INEXEC);
for (int i = 0; i < cloudlet.getNumberOfPes(); i++) {
rcl.setMachineAndPeId(0, i);
}
getCloudletExecList().add(rcl);
usedPes += cloudlet.getNumberOfPes();
} else { // no enough free PEs: go to the waiting queue
ResCloudlet rcl = new ResCloudlet(cloudlet);
rcl.setCloudletStatus(Cloudlet.QUEUED);
getCloudletWaitingList().add(rcl);
return 0.0;
}
// 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;
// use the current capacity to estimate the extra amount of
// time to file transferring. It must be added to the cloudlet length
double extraSize = capacity * fileTransferTime;
long length = cloudlet.getCloudletLength();
length += extraSize;
cloudlet.setCloudletLength(length);
return cloudlet.getCloudletLength() / capacity;
}
