/*
* Title: CloudSim Toolkit
* Description: CloudSim (Cloud Simulation) Toolkit for Modeling and Simulation of Clouds
* Licence: GPL - http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2009-2012, The University of Melbourne, Australia
*/
package org.cloudbus.cloudsim.power;
import java.util.List;
import org.cloudbus.cloudsim.Host;
import org.cloudbus.cloudsim.Vm;
/**
* The Static Threshold (THR) VM allocation policy.
*
* If you are using any algorithms, policies or workload included in the power package, please cite
* the following paper:
*
* Anton Beloglazov, and Rajkumar Buyya, "Optimal Online Deterministic Algorithms and Adaptive
* Heuristics for Energy and Performance Efficient Dynamic Consolidation of Virtual Machines in
* Cloud Data Centers", Concurrency and Computation: Practice and Experience (CCPE), Volume 24,
* Issue 13, Pages: 1397-1420, John Wiley & Sons, Ltd, New York, USA, 2012
*
* @author Anton Beloglazov
* @since CloudSim Toolkit 3.0
*/
public class PowerVmAllocationPolicyMigrationStaticThreshold extends PowerVmAllocationPolicyMigrationAbstract {
/** The utilization threshold. */
private double utilizationThreshold = 0.9;
/**
* Instantiates a new power vm allocation policy migration mad.
*
* @param hostList the host list
* @param vmSelectionPolicy the vm selection policy
* @param utilizationThreshold the utilization threshold
*/
public PowerVmAllocationPolicyMigrationStaticThreshold(
List<? extends Host> hostList,
PowerVmSelectionPolicy vmSelectionPolicy,
double utilizationThreshold) {
super(hostList, vmSelectionPolicy);
setUtilizationThreshold(utilizationThreshold);
}
/**
* Checks if is host over utilized.
*
* @param _host the _host
* @return true, if is host over utilized
*/
@Override
protected boolean isHostOverUtilized(PowerHost host) {
addHistoryEntry(host, getUtilizationThreshold());
double totalRequestedMips = 0;
for (Vm vm : host.getVmList()) {
totalRequestedMips += vm.getCurrentRequestedTotalMips();
}
double utilization = totalRequestedMips / host.getTotalMips();
return utilization > getUtilizationThreshold();
}
/**
* Sets the utilization threshold.
*
* @param utilizationThreshold the new utilization threshold
*/
protected void setUtilizationThreshold(double utilizationThreshold) {
this.utilizationThreshold = utilizationThreshold;
}
/**
* Gets the utilization threshold.
*
* @return the utilization threshold
*/
protected double getUtilizationThreshold() {
return utilizationThreshold;
}
}