Commit fe5ec634 authored by rodrigo.calheiros's avatar rodrigo.calheiros

Solved issue #11:

- VmSchedulerTimeShared and VmSchedulerTimeSharedOverSubscription were refactored to isolate the method
that decides MIPS shares in case of oversubscription.

- CloudSimExample1 has been reverted to its original version.
parent 95f57c7f
......@@ -89,15 +89,9 @@ public class CloudSimExample1 {
// create VM
Vm vm = new Vm(vmid, brokerId, mips, pesNumber, ram, bw, size, vmm, new CloudletSchedulerTimeShared());
Vm vm1 = new Vm(1, brokerId, mips, pesNumber, ram, bw, size, vmm, new CloudletSchedulerTimeShared());
Vm vm2 = new Vm(2, brokerId, mips, pesNumber, ram, bw, size, vmm, new CloudletSchedulerTimeShared());
// add the VM to the vmList
vmlist.add(vm);
vmlist.add(vm1);
vmlist.add(vm2);
// submit vm list to the broker
broker.submitVmList(vmlist);
......@@ -115,21 +109,9 @@ public class CloudSimExample1 {
cloudlet.setUserId(brokerId);
cloudlet.setVmId(vmid);
Cloudlet cloudlet1 = new Cloudlet(1, length, pesNumber, fileSize, outputSize, utilizationModel, utilizationModel, utilizationModel);
cloudlet1.setUserId(brokerId);
cloudlet1.setVmId(1);
Cloudlet cloudlet2 = new Cloudlet(2, length, pesNumber, fileSize, outputSize, utilizationModel, utilizationModel, utilizationModel);
cloudlet2.setUserId(brokerId);
cloudlet2.setVmId(2);
// add the cloudlet to the list
cloudletList.add(cloudlet);
cloudletList.add(cloudlet1);
cloudletList.add(cloudlet2);
// submit cloudlet list to the broker
broker.submitCloudletList(cloudletList);
......
......@@ -99,7 +99,7 @@ public class VmSchedulerTimeShared extends VmScheduler {
if (getVmsMigratingOut().contains(vmUid)) {
mipsRequested *= 0.9; // performance degradation due to migration = 10% MIPS
} else if (getVmsMigratingIn().contains(vmUid)) {
mipsRequested *= 0.1; // performance cost incurred by the destination host = 10% MIPS
mipsRequested *= 0.1; // performance cost incurred by the destination host = 90% MIPS
}
mipsShareAllocated.add(mipsRequested);
}
......@@ -108,49 +108,79 @@ public class VmSchedulerTimeShared extends VmScheduler {
getMipsMap().put(vmUid, mipsShareAllocated);
setAvailableMips(getAvailableMips() - totalRequestedMips);
} else {
int pesSkipped = 0;
for (List<Double> mipsMap : getMipsMap().values()) {
for (int i = 0; i < mipsMap.size(); i++) {
if (mipsMap.get(i) == 0) {
pesSkipped++;
continue;
}
updateShortage();
}
return true;
}
double shortage = (totalRequestedMips - getAvailableMips()) / (getPesInUse() - pesSkipped);
/**
* This method recalculates distribution of MIPs among VMs considering eventual shortage of MIPS
* compared to the amount requested by VMs.
*/
protected void updateShortage() {
//first, we have to know the wight of each VM
//in the allocation of mips. We want to keep
//allocation proportional to it
getMipsMap().put(vmUid, mipsShareAllocated);
setAvailableMips(0);
double additionalShortage = 0;
do {
additionalShortage = 0;
for (Entry<String, List<Double>> entry : getMipsMap().entrySet()) {
if (getVmsMigratingIn().contains(entry.getKey())) {
continue;
}
List<Double> mipsMap = entry.getValue();
for (int i = 0; i < mipsMap.size(); i++) {
if (mipsMap.get(i) == 0) {
continue;
}
if (mipsMap.get(i) >= shortage) {
mipsMap.set(i, mipsMap.get(i) - shortage);
} else {
additionalShortage += shortage - mipsMap.get(i);
mipsMap.set(i, 0.0);
}
if (mipsMap.get(i) == 0) {
pesSkipped++;
HashMap<String,Double> weightMap = new HashMap<String,Double>();
double totalRequiredMips = 0.0;
Iterator<Entry<String, List<Double>>> iter = mipsMapRequested.entrySet().iterator();
while (iter.hasNext()){
Entry<String, List<Double>> entry = iter.next();
//each element of the iterator is one entry of the table: (vmId, mipsShare)
String vmId = entry.getKey();
List<Double> shares = entry.getValue();
//count amount of mips required by the vm
double requiredMipsByThisVm = 0.0;
for(double share: shares){
totalRequiredMips+=share;
requiredMipsByThisVm+=share;
}
//store the value to use later to define weights
weightMap.put(vmId, requiredMipsByThisVm);
}
//now, we have the information on individual weights
//use this information to define actual shares of
//mips received by each VM
iter = mipsMapRequested.entrySet().iterator();
while (iter.hasNext()){
Entry<String, List<Double>> entry = iter.next();
//each element of the iterator is one entry of the table: (vmId, mipsShare)
String vmId = entry.getKey();
List<Double> shares = entry.getValue();
//get weight of this vm
double vmWeight = weightMap.get(vmId)/totalRequiredMips;
//update actual received share
LinkedList<Double> updatedSharesList = new LinkedList<Double>();
double actuallyAllocatedMips = 0.0;
for(double share: shares){
double updatedShare = share*vmWeight;
//update share if migrating
if (getVmsMigratingOut().contains(vmId)) {
updatedShare *= 0.9; // performance degradation due to migration = 10% MIPS
} else if (getVmsMigratingIn().contains(vmId)) {
updatedShare *= 0.1; // performance cost incurred by the destination host = 90% MIPS
}
shortage = additionalShortage / (getPesInUse() - pesSkipped);
} while (additionalShortage > 0);
actuallyAllocatedMips+=updatedShare;
updatedSharesList.add(updatedShare);
}
return true;
//add in the new map
getMipsMap().put(vmId, updatedSharesList);
setAvailableMips(getAvailableMips() - actuallyAllocatedMips);
}
}
/**
......@@ -170,8 +200,8 @@ public class VmSchedulerTimeShared extends VmScheduler {
for (Map.Entry<String, List<Double>> entry : getMipsMap().entrySet()) {
String vmUid = entry.getKey();
getPeMap().put(vmUid, new LinkedList<Pe>());
for (double mips : entry.getValue()) {
System.out.println("=> mips:"+mips);
while (mips >= 0.1) {
if (availableMips >= mips) {
peProvisioner.allocateMipsForVm(vmUid, mips);
......
......@@ -86,36 +86,7 @@ public class VmSchedulerTimeSharedOverSubscription extends VmSchedulerTimeShared
pesSkipped += mipsShareRequested.size();
}
double shortage = (totalRequestedMips - getAvailableMips()) / (getPesInUse() - pesSkipped);
getMipsMap().put(vmUid, mipsShareAllocated);
setAvailableMips(0);
double additionalShortage = 0;
do {
additionalShortage = 0;
for (Entry<String, List<Double>> entry : getMipsMap().entrySet()) {
if (getVmsMigratingIn().contains(entry.getKey())) {
continue;
}
List<Double> mipsMap = entry.getValue();
for (int i = 0; i < mipsMap.size(); i++) {
if (mipsMap.get(i) == 0) {
continue;
}
if (mipsMap.get(i) >= shortage) {
mipsMap.set(i, mipsMap.get(i) - shortage);
} else {
additionalShortage += shortage - mipsMap.get(i);
mipsMap.set(i, 0.0);
}
if (mipsMap.get(i) == 0) {
pesSkipped++;
}
}
}
shortage = additionalShortage / (getPesInUse() - pesSkipped);
} while (additionalShortage > 0);
updateShortage();
}
return true;
......
......@@ -68,8 +68,6 @@ public class PeProvisionerSimple extends PeProvisioner {
setAvailableMips(getAvailableMips() - mips);
getPeTable().put(vmUid, allocatedMips);
System.out.print("MIPS allocated for vm "+vmUid+" :");
for (double m:allocatedMips) System.out.print(" "+m+" "); System.out.println();
return true;
}
......@@ -89,6 +87,7 @@ for (double m:allocatedMips) System.out.print(" "+m+" "); System.out.println();
}
setAvailableMips(getAvailableMips() + getTotalAllocatedMipsForVm(vm) - totalMipsToAllocate);
getPeTable().put(vm.getUid(), mips);
return true;
......
package org.cloudbus.cloudsim;
/*
* 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, The University of Melbourne, Australia
*/
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.LinkedList;
import java.util.List;
import org.cloudbus.cloudsim.Cloudlet;
import org.cloudbus.cloudsim.CloudletSchedulerTimeShared;
import org.cloudbus.cloudsim.Datacenter;
import org.cloudbus.cloudsim.DatacenterBroker;
import org.cloudbus.cloudsim.DatacenterCharacteristics;
import org.cloudbus.cloudsim.Host;
import org.cloudbus.cloudsim.Log;
import org.cloudbus.cloudsim.Pe;
import org.cloudbus.cloudsim.Storage;
import org.cloudbus.cloudsim.UtilizationModel;
import org.cloudbus.cloudsim.UtilizationModelFull;
import org.cloudbus.cloudsim.Vm;
import org.cloudbus.cloudsim.VmAllocationPolicySimple;
import org.cloudbus.cloudsim.VmSchedulerTimeShared;
import org.cloudbus.cloudsim.core.CloudSim;
import org.cloudbus.cloudsim.provisioners.BwProvisionerSimple;
import org.cloudbus.cloudsim.provisioners.PeProvisionerSimple;
import org.cloudbus.cloudsim.provisioners.RamProvisionerSimple;
/**
* A simple example showing how to create a datacenter with one host and run one
* cloudlet on it.
*/
public class TimeSharedProblemDetector {
/** The cloudlet list. */
private static List<Cloudlet> cloudletList;
/** The vmlist. */
private static List<Vm> vmlist;
/**
* Creates main() to run this example.
*
* @param args the args
*/
public static void main(String[] args) {
Log.printLine("Starting CloudSimExample1...");
try {
// First step: Initialize the CloudSim package. It should be called
// before creating any entities.
int num_user = 1; // number of cloud users
Calendar calendar = Calendar.getInstance();
boolean trace_flag = false; // mean trace events
// Initialize the CloudSim library
CloudSim.init(num_user, calendar, trace_flag);
// Second step: Create Datacenters
// Datacenters are the resource providers in CloudSim. We need at
// list one of them to run a CloudSim simulation
Datacenter datacenter0 = createDatacenter("Datacenter_0");
// Third step: Create Broker
DatacenterBroker broker = createBroker();
int brokerId = broker.getId();
// Fourth step: Create one virtual machine
vmlist = new ArrayList<Vm>();
// VM description
int vmid = 0;
int mips = 1000;
long size = 10000; // image size (MB)
int ram = 512; // vm memory (MB)
long bw = 1000;
int pesNumber = 1; // number of cpus
String vmm = "Xen"; // VMM name
// create VM
Vm vm = new Vm(vmid, brokerId, mips, pesNumber, ram, bw, size, vmm, new CloudletSchedulerTimeShared());
Vm vm1 = new Vm(1, brokerId, mips, pesNumber, ram, bw, size, vmm, new CloudletSchedulerTimeShared());
Vm vm2 = new Vm(2, brokerId, mips, pesNumber, ram, bw, size, vmm, new CloudletSchedulerTimeShared());
// add the VM to the vmList
vmlist.add(vm);
vmlist.add(vm1);
vmlist.add(vm2);
// submit vm list to the broker
broker.submitVmList(vmlist);
// Fifth step: Create one Cloudlet
cloudletList = new ArrayList<Cloudlet>();
// Cloudlet properties
int id = 0;
long length = 400000;
long fileSize = 300;
long outputSize = 300;
UtilizationModel utilizationModel = new UtilizationModelFull();
Cloudlet cloudlet = new Cloudlet(id, length, pesNumber, fileSize, outputSize, utilizationModel, utilizationModel, utilizationModel);
cloudlet.setUserId(brokerId);
cloudlet.setVmId(vmid);
Cloudlet cloudlet1 = new Cloudlet(1, length, pesNumber, fileSize, outputSize, utilizationModel, utilizationModel, utilizationModel);
cloudlet1.setUserId(brokerId);
cloudlet1.setVmId(1);
Cloudlet cloudlet2 = new Cloudlet(2, length, pesNumber, fileSize, outputSize, utilizationModel, utilizationModel, utilizationModel);
cloudlet2.setUserId(brokerId);
cloudlet2.setVmId(2);
// add the cloudlet to the list
cloudletList.add(cloudlet);
cloudletList.add(cloudlet1);
cloudletList.add(cloudlet2);
// submit cloudlet list to the broker
broker.submitCloudletList(cloudletList);
// Sixth step: Starts the simulation
CloudSim.startSimulation();
CloudSim.stopSimulation();
//Final step: Print results when simulation is over
List<Cloudlet> newList = broker.getCloudletReceivedList();
printCloudletList(newList);
// Print the debt of each user to each datacenter
datacenter0.printDebts();
Log.printLine("CloudSimExample1 finished!");
} catch (Exception e) {
e.printStackTrace();
Log.printLine("Unwanted errors happen");
}
}
/**
* Creates the datacenter.
*
* @param name the name
*
* @return the datacenter
*/
private static Datacenter createDatacenter(String name) {
// Here are the steps needed to create a PowerDatacenter:
// 1. We need to create a list to store
// our machine
List<Host> hostList = new ArrayList<Host>();
// 2. A Machine contains one or more PEs or CPUs/Cores.
// In this example, it will have only one core.
List<Pe> peList = new ArrayList<Pe>();
int mips = 1000;
// 3. Create PEs and add these into a list.
peList.add(new Pe(0, new PeProvisionerSimple(mips))); // need to store Pe id and MIPS Rating
// 4. Create Host with its id and list of PEs and add them to the list
// of machines
int hostId = 0;
int ram = 2048; // host memory (MB)
long storage = 1000000; // host storage
int bw = 10000;
hostList.add(
new Host(
hostId,
new RamProvisionerSimple(ram),
new BwProvisionerSimple(bw),
storage,
peList,
new VmSchedulerTimeShared(peList)
)
); // This is our machine
// 5. Create a DatacenterCharacteristics object that stores the
// properties of a data center: architecture, OS, list of
// Machines, allocation policy: time- or space-shared, time zone
// and its price (G$/Pe time unit).
String arch = "x86"; // system architecture
String os = "Linux"; // operating system
String vmm = "Xen";
double time_zone = 10.0; // time zone this resource located
double cost = 3.0; // the cost of using processing in this resource
double costPerMem = 0.05; // the cost of using memory in this resource
double costPerStorage = 0.001; // the cost of using storage in this
// resource
double costPerBw = 0.0; // the cost of using bw in this resource
LinkedList<Storage> storageList = new LinkedList<Storage>(); // we are not adding SAN
// devices by now
DatacenterCharacteristics characteristics = new DatacenterCharacteristics(
arch, os, vmm, hostList, time_zone, cost, costPerMem,
costPerStorage, costPerBw);
// 6. Finally, we need to create a PowerDatacenter object.
Datacenter datacenter = null;
try {
datacenter = new Datacenter(name, characteristics, new VmAllocationPolicySimple(hostList), storageList, 0);
} catch (Exception e) {
e.printStackTrace();
}
return datacenter;
}
// We strongly encourage users to develop their own broker policies, to
// submit vms and cloudlets according
// to the specific rules of the simulated scenario
/**
* Creates the broker.
*
* @return the datacenter broker
*/
private static DatacenterBroker createBroker() {
DatacenterBroker broker = null;
try {
broker = new DatacenterBroker("Broker");
} catch (Exception e) {
e.printStackTrace();
return null;
}
return broker;
}
/**
* Prints the Cloudlet objects.
*
* @param list list of Cloudlets
*/
private static void printCloudletList(List<Cloudlet> list) {
int size = list.size();
Cloudlet cloudlet;
String indent = " ";
Log.printLine();
Log.printLine("========== OUTPUT ==========");
Log.printLine("Cloudlet ID" + indent + "STATUS" + indent
+ "Data center ID" + indent + "VM ID" + indent + "Time" + indent
+ "Start Time" + indent + "Finish Time");
DecimalFormat dft = new DecimalFormat("###.##");
for (int i = 0; i < size; i++) {
cloudlet = list.get(i);
Log.print(indent + cloudlet.getCloudletId() + indent + indent);
if (cloudlet.getCloudletStatus() == Cloudlet.SUCCESS) {
Log.print("SUCCESS");
Log.printLine(indent + indent + cloudlet.getResourceId()
+ indent + indent + indent + cloudlet.getVmId()
+ indent + indent
+ dft.format(cloudlet.getActualCPUTime()) + indent
+ indent + dft.format(cloudlet.getExecStartTime())
+ indent + indent
+ dft.format(cloudlet.getFinishTime()));
}
}
}
}
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