I'm trying to find host utilization value and get specific value but I'm still confused because the host utilization value I can get is a fixed value which means I failed to get it as I found
1- host utilization equal to sum(vm utilization)
2- Vm utilization equal to AbsoluteCloudletCpuUtilizationForAllPes(time, cloudlet)).sum() / vm.getTotalMipsCapacity();
3- AbsoluteCloudletCpuUtilizationForAllPes(time, cloudlet)
private double getAbsoluteCloudletCpuUtilizationForAllPes(final double time, final Cloudlet cloudlet) {
final double cloudletCpuUsageForOnePe =
getAbsoluteCloudletResourceUtilization(
cloudlet.getUtilizationModelCpu(), time, getAvailableMipsByPe());
return cloudletCpuUsageForOnePe * cloudlet.getNumberOfPes();
}
*/
private double getAbsoluteCloudletResourceUtilization(
final UtilizationModel model,
final double time,
final double maxResourceAllowedToUse)
{
if (model.getUnit() == Unit.ABSOLUTE) {
return Math.min(model.getUtilization(time), maxResourceAllowedToUse);
}
return model.getUtilization() * maxResourceAllowedToUse;
}
4- model.getUtilization()
private static final double CLOUDLET_INITIAL_CPU_PERCENTAGE = 0.8;
createCpuUtilizationModel(CLOUDLET_INITIAL_CPU_PERCENTAGE, 1);
private UtilizationModelDynamic createCpuUtilizationModel(double initialCpuUsagePercent, double maxCpuUsagePercentage) {
if(maxCpuUsagePercentage < initialCpuUsagePercent){
throw new IllegalArgumentException("Max CPU usage must be equal or greater than the initial CPU usage.");
}
initialCpuUsagePercent = Math.min(initialCpuUsagePercent, 1);
maxCpuUsagePercentage = Math.min(maxCpuUsagePercentage, 1);
UtilizationModelDynamic um;
if (initialCpuUsagePercent < maxCpuUsagePercentage) {
um = new UtilizationModelDynamic(initialCpuUsagePercent)
.setUtilizationUpdateFunction(this::getCpuUsageIncrement);
} else {
um = new UtilizationModelDynamic(initialCpuUsagePercent);
}
um.setMaxResourceUtilization(maxCpuUsagePercentage);
5- return um;
6- }
public UtilizationModelDynamic(final Unit unit, final double initialUtilization, final double maxResourceUtilization) {
super(unit);
this.readOnly = false;
this.setMaxResourceUtilization(maxResourceUtilization);
this.previousUtilizationTime = 0;
this.currentUtilizationTime = 0;
this.setCurrentUtilization(initialUtilization);
utilizationUpdateFunction = modelInstance -> modelInstance.currentUtilization;
}
public double getUtilization(final double time) {
currentUtilizationTime = time;
if(previousUtilizationTime != time) {
currentUtilization = utilizationUpdateFunction.apply(new UtilizationModelDynamic(this));
previousUtilizationTime = time;
if (currentUtilization maxResourceUtilization && maxResourceUtilization > 0) {
currentUtilization = maxResourceUtilization;
}
}
return currentUtilization;
}
Can't I understand the currentUtilization equal to the constant value as the initial use?
we can use planetlab data to change value of UtilizationModelCpu from constant value to dynamic value
final UtilizationModel utilizationCpu = UtilizationModelPlanetLab.getInstance(TRACE_FILE, SCHEDULING_INTERVAL);
Cloudlet cloudlet =
new CloudletSimpl() .setUtilizationModelCpu(utilizationCpu)
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