/** * 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.getPesNumber(); 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) { if ((currentCpus - usedPes) >= cloudlet.getPesNumber()) { // it can go to the exec list ResCloudlet rcl = new ResCloudlet(cloudlet); rcl.setCloudletStatus(Cloudlet.INEXEC); for (int i = 0; i < cloudlet.getPesNumber(); i++) { rcl.setMachineAndPeId(0, i); } getCloudletExecList().add(rcl); usedPes += cloudlet.getPesNumber(); } 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; }