@Override
public void execute() {
double util = 0;
double power = 0;
double prevSlavWork;
double prevWork;
// store current work and SLA violated work values
prevSlavWork = totalSlavWork;
prevWork = totalWork;
// reset total work values
totalSlavWork = 0;
totalWork = 0;
totalPower = 0;
for (Host host : dc.getHosts()) {
// store host CPU utilization
if (!hostUtil.containsKey(host)) {
hostUtil.put(host, new DescriptiveStatistics());
}
hostUtil.get(host).addValue(host.getCpuManager().getCpuInUse());
util += host.getCpuManager().getCpuInUse();
// get VM SLA values
for (VMAllocation vmAlloc : host.getVMAllocations()) {
totalSlavWork += vmAlloc.getVm().getApplication().getTotalSLAViolatedWork();
totalWork +=
vmAlloc
.getVm()
.getApplication()
.getTotalIncomingWork(); // NOTE: This ONLY works with SINGLE TIERED applications.
// For multi-tiered applications, this will count incoming
// work multiple times!!
}
// get power consumption
power += host.getCurrentPowerConsumption();
totalPower += host.getPowerConsumed();
}
dcUtil.addValue(util);
dcPower.addValue(power);
dcPowerEfficiency.addValue(util / power);
double optimalPowerConsumption = calculateOptimalPowerConsumption(util);
dcOptimalPower.addValue(optimalPowerConsumption);
dcOptimalPowerEfficiency.addValue(util / optimalPowerConsumption);
dcOptimalPowerRatio.addValue((util / optimalPowerConsumption) / (util / power));
// records the total fraction of SLA violated incoming work since the last time interval
dcSla.addValue((totalSlavWork - prevSlavWork) / (totalWork - prevWork));
}
/**
* Construct a list of VMs that must be executed
*
* @param hosts
* @return
*/
private ArrayList<VMAllocation> buildVmList(ArrayList<Host> hosts) {
ArrayList<VMAllocation> vmList = new ArrayList<VMAllocation>();
for (Host host : hosts) {
vmList.addAll(host.getVMAllocations());
}
Collections.sort(vmList, new VmExecutionOrderComparator());
return vmList;
}