76 lines
2.5 KiB
Java
76 lines
2.5 KiB
Java
/*
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* Title: CloudSim Toolkit
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* Description: CloudSim (Cloud Simulation) Toolkit for Modeling and Simulation of Clouds
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* Licence: GPL - http://www.gnu.org/copyleft/gpl.html
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*
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* Copyright (c) 2009-2012, The University of Melbourne, Australia
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*/
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package org.cloudbus.cloudsim.power;
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import java.util.List;
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import org.cloudbus.cloudsim.Pe;
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import org.cloudbus.cloudsim.VmScheduler;
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import org.cloudbus.cloudsim.power.models.PowerModel;
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import org.cloudbus.cloudsim.provisioners.BwProvisioner;
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import org.cloudbus.cloudsim.provisioners.RamProvisioner;
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import org.cloudbus.cloudsim.util.MathUtil;
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/**
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* The class of a host that stores its CPU utilization history. The history is used by VM allocation
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* and selection policies.
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*
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* If you are using any algorithms, policies or workload included in the power package please cite
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* the following paper:
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*
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* Anton Beloglazov, and Rajkumar Buyya, "Optimal Online Deterministic Algorithms and Adaptive
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* Heuristics for Energy and Performance Efficient Dynamic Consolidation of Virtual Machines in
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* Cloud Data Centers", Concurrency and Computation: Practice and Experience (CCPE), Volume 24,
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* Issue 13, Pages: 1397-1420, John Wiley & Sons, Ltd, New York, USA, 2012
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*
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* @author Anton Beloglazov
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* @since CloudSim Toolkit 2.0
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*/
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public class PowerHostUtilizationHistory extends PowerHost {
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/**
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* Instantiates a new power host utilization history.
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*
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* @param id the id
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* @param ramProvisioner the ram provisioner
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* @param bwProvisioner the bw provisioner
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* @param storage the storage
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* @param peList the pe list
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* @param vmScheduler the vm scheduler
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* @param powerModel the power model
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*/
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public PowerHostUtilizationHistory(
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int id,
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RamProvisioner ramProvisioner,
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BwProvisioner bwProvisioner,
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long storage,
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List<? extends Pe> peList,
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VmScheduler vmScheduler,
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PowerModel powerModel) {
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super(id, ramProvisioner, bwProvisioner, storage, peList, vmScheduler, powerModel);
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}
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/**
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* Gets the host utilization history.
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*
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* @return the host utilization history
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*/
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protected double[] getUtilizationHistory() {
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double[] utilizationHistory = new double[PowerVm.HISTORY_LENGTH];
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double hostMips = getTotalMips();
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for (PowerVm vm : this.<PowerVm> getVmList()) {
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for (int i = 0; i < vm.getUtilizationHistory().size(); i++) {
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utilizationHistory[i] += vm.getUtilizationHistory().get(i) * vm.getMips() / hostMips;
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}
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}
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return MathUtil.trimZeroTail(utilizationHistory);
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}
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}
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