@Override
public String toString() {
return "Machine(S:"
+ currentState
+ " C:"
+ internalReallyFreeCaps.getRequiredCPUs()
+ " M:"
+ internalReallyFreeCaps.getRequiredMemory()
+ " "
+ localDisk.toString()
+ " "
+ super.toString()
+ ")";
}
/**
* @author "Gabor Kecskemeti, Distributed and Parallel Systems Group, University of Innsbruck (c)
* 2013" "Gabor Kecskemeti, Laboratory of Parallel and Distributed Systems, MTA SZTAKI (c) 2012"
*/
public class PhysicalMachine extends MaxMinProvider
implements VMManager<PhysicalMachine, ResourceConstraints> {
public static final int defaultAllocLen = 1000;
public static final int migrationAllocLen = 1000000;
public static final double smallUtilization = 0.001;
/**
* Represents the possible states of the physical machines modeled in the system
*
* @author "Gabor Kecskemeti, Distributed and Parallel Systems Group, University of Innsbruck (c)
* 2013"
*/
public static enum State {
/** The machine is completely switched off, minimal consumption is recorded. */
OFF,
/** The machine is under preparation to serve VMs. Some consumption is recorded already. */
SWITCHINGON,
/** The machine is currently serving VMs. The machine and its VMs are consuming energy. */
RUNNING,
/**
* The machine is about to be switched off. It no longer accepts VM requests but it still
* consumes energy.
*/
SWITCHINGOFF
};
public static final EnumSet<State> ToOnorRunning = EnumSet.of(State.SWITCHINGON, State.RUNNING);
public static final EnumSet<State> ToOfforOff = EnumSet.of(State.SWITCHINGOFF, State.OFF);
public static final EnumSet<State> StatesOfHighEnergyConsumption =
EnumSet.of(State.SWITCHINGON, State.RUNNING, State.SWITCHINGOFF);
public interface StateChangeListener {
void stateChanged(PhysicalMachine pm, State oldState, State newState);
}
public class ResourceAllocation extends DeferredEvent implements VirtualMachine.StateChange {
public final ResourceConstraints allocated;
private final ResourceConstraints realAllocated;
private VirtualMachine user = null;
private final int myPromisedIndex;
private boolean swept = false;
private ResourceAllocation(
final ResourceConstraints realAlloc, final ResourceConstraints alloc, final int until) {
super(until);
allocated = alloc;
realAllocated = realAlloc;
int prLen = promisedResources.length;
int i = 0;
for (i = 0; i < prLen && promisedResources[i] != null; i++) ;
if (i == prLen) {
ResourceAllocation[] alls = new ResourceAllocation[prLen * 2];
System.arraycopy(promisedResources, 0, alls, 0, prLen);
promisedResources = alls;
promisedResources[prLen] = this;
myPromisedIndex = prLen;
} else {
promisedResources[i] = this;
myPromisedIndex = i;
}
promisedCapacities.singleAdd(realAllocated);
internalReallyFreeCaps.subtract(realAllocated);
promisedAllocationsCount++;
}
@Override
protected void eventAction() {
System.err.println("Warning! Expiring resource allocation.");
swept = true;
promisedCapacityUpdater();
}
private void promisedCapacityUpdater() {
promisedResources[myPromisedIndex] = null;
promisedAllocationsCount--;
if (promisedAllocationsCount == 0) {
promisedCapacities.subtract(promisedCapacities);
} else {
promisedCapacities.subtract(realAllocated);
}
if (isUnUsed()) {
internalReallyFreeCaps.singleAdd(realAllocated);
}
}
public void cancel() {
super.cancel();
promisedCapacityUpdater();
}
void use(final VirtualMachine vm) throws VMManagementException {
if (swept) {
throw new VMManagementException("Tried to use an already expired allocation");
}
if (user == null) {
user = vm;
internalAvailableCaps.subtract(realAllocated);
vms.add(vm);
vm.subscribeStateChange(this);
cancel();
} else {
throw new VMManagementException("Tried to use a resource allocation more than once!");
}
}
@Override
public void stateChanged(
VirtualMachine vm, VirtualMachine.State oldState, VirtualMachine.State newState) {
if (oldState.equals(VirtualMachine.State.RUNNING)) {
release();
}
}
void release() {
if (user != null) {
vms.remove(user);
user.unsubscribeStateChange(this);
completedVMs++;
internalAvailableCaps.singleAdd(realAllocated);
internalReallyFreeCaps.singleAdd(realAllocated);
increasingFreeCapacityListenerManager.notifyListeners(
Collections.singletonList(realAllocated));
user = null;
swept = true;
}
}
public boolean isUnUsed() {
return user == null;
}
public boolean isAvailable() {
return isUnUsed() && !swept;
}
@Override
public String toString() {
return "RA(Canc:" + swept + " " + allocated + ")";
}
public PhysicalMachine getHost() {
return PhysicalMachine.this;
}
}
public class PowerStateDelayer extends ConsumptionEventAdapter {
private State newState;
// The end of the list is the upcoming task
final TDoubleLinkedList tasksDue;
public final long transitionStart;
ResourceConsumption currentConsumption = null;
public PowerStateDelayer(final double[] tasklist, final State newPowerState) {
onOffEvent = this;
newState = newPowerState;
tasksDue = new TDoubleLinkedList();
tasksDue.add(tasklist);
sendTask();
transitionStart = Timed.getFireCount();
}
private void sendTask() {
// Did we finish all the tasks for the state change?
if (tasksDue.size() == 0) {
// Mark the completion of the state change
onOffEvent = null;
setState(newState);
return;
}
// No we did not, lets send some more to our direct consumer
final double totalConsumption = tasksDue.removeAt(0);
final double limit = tasksDue.removeAt(0);
currentConsumption =
new ResourceConsumption(
totalConsumption, limit, directConsumer, PhysicalMachine.this, this);
if (!currentConsumption.registerConsumption()) {
throw new IllegalStateException(
"PowerStateChange was not successful because resource consumption could not be registered");
}
}
@Override
public void conComplete() {
sendTask();
}
@Override
public void conCancelled(ResourceConsumption problematic) {
throw new IllegalStateException("Unexpected termination of one of the state changing tasks");
}
public void addFurtherTasks(final double[] tasklist) {
tasksDue.add(tasklist);
}
public void setNewState(State newState) {
this.newState = newState;
}
}
private final ConstantConstraints totalCapacities;
// Available physical resources:
private final AlterableResourceConstraints internalAvailableCaps;
/**
* This field can automatically update between two checks! If you need unaltered data please make
* a copy.
*/
public final UnalterableConstraintsPropagator availableCapacities;
private AlterableResourceConstraints promisedCapacities =
AlterableResourceConstraints.getNoResources();
private final AlterableResourceConstraints internalReallyFreeCaps;
/**
* This field can automatically update between two checks! If you need unaltered data please make
* a copy.
*/
public final UnalterableConstraintsPropagator freeCapacities;
public final Repository localDisk;
private ResourceAllocation[] promisedResources = new ResourceAllocation[2];
private int promisedAllocationsCount = 0;
// Internal state management
private State currentState = null;
private final double[] onTransition;
private final double[] offTransition;
private final long onDelayEstimate;
private final long offDelayEstimate;
public static enum PowerStateKind {
host,
storage,
network
};
private final EnumMap<State, PowerState> hostPowerBehavior;
private final EnumMap<State, PowerState> storagePowerBehavior;
private final EnumMap<State, PowerState> networkPowerBehavior;
private final StateDependentEventHandler<StateChangeListener, Pair<State, State>>
stateListenerManager =
new StateDependentEventHandler<PhysicalMachine.StateChangeListener, Pair<State, State>>(
new SingleNotificationHandler<StateChangeListener, Pair<State, State>>() {
@Override
public void sendNotification(
final StateChangeListener onObject, final Pair<State, State> states) {
onObject.stateChanged(PhysicalMachine.this, states.getLeft(), states.getRight());
}
});
// Managed VMs
private final HashSet<VirtualMachine> vms = new HashSet<VirtualMachine>(); // current
public final Set<VirtualMachine> publicVms = Collections.unmodifiableSet(vms);
private long completedVMs = 0; // Past
// The onOffEvent here is managed by the delayer itself.
private PowerStateDelayer onOffEvent = null;
private final StateDependentEventHandler<
CapacityChangeEvent<ResourceConstraints>, List<ResourceConstraints>>
increasingFreeCapacityListenerManager =
new StateDependentEventHandler<
VMManager.CapacityChangeEvent<ResourceConstraints>, List<ResourceConstraints>>(
new SingleNotificationHandler<
CapacityChangeEvent<ResourceConstraints>, List<ResourceConstraints>>() {
@Override
public void sendNotification(
final CapacityChangeEvent<ResourceConstraints> onObject,
final List<ResourceConstraints> recentlyFreedUpResources) {
onObject.capacityChanged(freeCapacities, recentlyFreedUpResources);
}
});
// The "hidden" - non VM - consumer (representing the VMM's actions and the
// PM's own operations
public final MaxMinConsumer directConsumer;
private boolean directConsumerUsageMoratory = true;
/**
* Defines a new physical machine, ensures that there are no VMs running so far
*
* @param cores defines the number of CPU cores this machine has under control
* @param perCorePocessing defines the processing capabilities of a single CPU core in this
* machine (in instructions/tick)
* @param memory defines the total physical memory this machine has under control (in bytes)
* @param disk defines the local physical disk & networking this machine has under control
* @param onD defines the time delay between the machine's switch on and the first time it can
* serve VM requests
* @param offD defines the time delay the machine needs to shut down all of its operations while
* it does not serve any more VMs
* @param powerTransitions determines the applied power state transitions while the physical
* machine state changes. This is the principal way to alter a PM's energy consumption
* behavior.
*/
public PhysicalMachine(
double cores,
double perCorePocessing,
long memory,
Repository disk,
int onD,
int offD,
EnumMap<PowerStateKind, EnumMap<State, PowerState>> powerTransitions) {
this(
cores,
perCorePocessing,
memory,
disk,
new double[] {
onD * perCorePocessing * smallUtilization, perCorePocessing * smallUtilization
},
new double[] {
offD * perCorePocessing * smallUtilization, perCorePocessing * smallUtilization
},
powerTransitions);
}
/**
* @param on which taskset needs to be prepared
* @param array the task array
* @return the estimated runtime of all tasks in the array
*/
private long prepareTransitionalTasks(boolean on, double[] array) {
final double[] writeHere = on ? onTransition : offTransition;
System.arraycopy(array, 0, writeHere, 0, array.length);
long odSum = 0;
for (int i = 0; i < array.length; i += 2) {
odSum += (long) (array[i] / array[i + 1]);
}
return odSum;
}
public PhysicalMachine(
double cores,
double perCorePocessing,
long memory,
Repository disk,
double[] turnonOperations,
double[] switchoffOperations,
EnumMap<PowerStateKind, EnumMap<State, PowerState>> powerTransitions) {
super(cores * perCorePocessing);
// Init resources:
totalCapacities = new ConstantConstraints(cores, perCorePocessing, memory);
internalAvailableCaps = new AlterableResourceConstraints(totalCapacities);
availableCapacities = new UnalterableConstraintsPropagator(internalAvailableCaps);
internalReallyFreeCaps = new AlterableResourceConstraints(totalCapacities);
freeCapacities = new UnalterableConstraintsPropagator(internalReallyFreeCaps);
localDisk = disk;
hostPowerBehavior = powerTransitions.get(PowerStateKind.host);
storagePowerBehavior = powerTransitions.get(PowerStateKind.storage);
networkPowerBehavior = powerTransitions.get(PowerStateKind.network);
onTransition = new double[turnonOperations.length];
onDelayEstimate = prepareTransitionalTasks(true, turnonOperations);
offTransition = new double[switchoffOperations.length];
offDelayEstimate = prepareTransitionalTasks(false, switchoffOperations);
if (hostPowerBehavior == null || storagePowerBehavior == null || networkPowerBehavior == null) {
throw new IllegalStateException(
"Cannot initialize physical machine without a complete power behavior set");
}
setState(State.OFF);
directConsumer = new MaxMinConsumer(getPerTickProcessingPower());
}
/**
* Starts the turn off procedure for the physical machine so it no longer accepts VM requests but
* it does not consume anymore
*
* @param migrateHere the physical machine where the currently hosted VMs of this VM should go
* before the actual switch off operation will happen
* @return
* <ul>
* <li>true if the switch off procedure has started
* <li>false if there are still VMs running and migration target was not specified thus the
* switch off is not possible
* </ul>
*
* @throws NetworkException
* @throws VMManager.VMManagementException
*/
public boolean switchoff(final PhysicalMachine migrateHere)
throws VMManagementException, NetworkException {
if (migrateHere != null) {
final VirtualMachine[] vmarr = vms.toArray(new VirtualMachine[vms.size()]);
class MultiMigrate implements VirtualMachine.StateChange {
private int counter = 0;
@Override
public void stateChanged(
VirtualMachine vm, VirtualMachine.State oldState, VirtualMachine.State newState) {
switch (newState) {
case RUNNING:
counter++;
break;
case SUSPENDED_MIG:
// There is a problem but we cannot do here anything
// right now...
default:
}
if (counter == vmarr.length) {
for (int i = 0; i < vmarr.length; i++) {
vmarr[i].unsubscribeStateChange(this);
}
actualSwitchOff();
}
}
}
MultiMigrate mm = new MultiMigrate();
for (int i = 0; i < vmarr.length; i++) {
vmarr[i].subscribeStateChange(mm);
migrateVM(vmarr[i], migrateHere);
}
} else {
if (vms.size() + promisedAllocationsCount > 0) {
return false;
}
actualSwitchOff();
}
return true;
}
private void actualSwitchOff() {
switch (currentState) {
case SWITCHINGON:
setState(State.SWITCHINGOFF);
onOffEvent.addFurtherTasks(offTransition);
onOffEvent.setNewState(State.OFF);
break;
case RUNNING:
setState(State.SWITCHINGOFF);
new Timed() {
@Override
public void tick(final long fires) {
ResourceSpreader.FreqSyncer syncer = getSyncer();
// Ensures that the switching off activities are only
// started once all runtime activities complete for the
// directConsumer
if (syncer != null
&& syncer.isSubscribed()
&& (underProcessing.size() + toBeAdded.size() - toBeRemoved.size() > 0)) {
updateFrequency(syncer.getNextEvent() - fires + 1);
} else {
unsubscribe();
new PowerStateDelayer(offTransition, State.OFF);
}
}
}.tick(Timed.getFireCount());
break;
case OFF:
case SWITCHINGOFF:
// Nothing to do
System.err.println("WARNING: an already off PM was tasked to switch off!");
}
}
/**
* Determines if the machine can be used for VM instantiation.
*
* @return
* <ul>
* <li>true if the machine is ready to accept VM requests
* <li>false otherwise
* </ul>
*/
public boolean isRunning() {
return currentState.equals(State.RUNNING);
}
public State getState() {
return currentState;
}
/**
* Turns on the physical machine so it allows energy and resource consumption and opens the
* possibility to receive VM requests.
*/
public void turnon() {
switch (currentState) {
case SWITCHINGOFF:
case OFF:
if (onOffEvent == null) {
new PowerStateDelayer(onTransition, State.RUNNING);
} else {
onOffEvent.addFurtherTasks(onTransition);
onOffEvent.setNewState(State.RUNNING);
}
setState(State.SWITCHINGON);
break;
case RUNNING:
case SWITCHINGON:
// Nothing to do
System.err.println("WARNING: an already running PM was tasked to switch on!");
}
}
@Override
public void migrateVM(final VirtualMachine vm, final PhysicalMachine target)
throws VMManagementException, NetworkNode.NetworkException {
if (vms.contains(vm)) {
vm.migrate(
target.allocateResources(vm.getResourceAllocation().allocated, true, migrationAllocLen));
}
}
@Override
public void reallocateResources(
final VirtualMachine vm, final ResourceConstraints newresources) {}
/**
* Ensures the requested amount of resources are going to be available in the foreseeable future
* on this physical machine.
*
* @param requested The amount of resources needed by the caller
* @return With a time limited offer on the requested resources. If the requested
* resourceconstraints cannot be met by the function then it returns with the maximum amount
* of resources it can serve. If there are no available resources it returns with <i>null</i>!
* If the requested resources are available then the original requested resourceconstraints
* object is stored in the returned resource allocation. If the resourceconstraints only
* specified a minimum resource limit, then a new resourceconstraints object is returned with
* details of the maximum possible resource constraints that can fit into the machine.
*/
public ResourceAllocation allocateResources(
final ResourceConstraints requested, final boolean strict, final int allocationValidityLength)
throws VMManagementException {
if (!currentState.equals(State.RUNNING)) {
throw new VMManagementException("The PM is not running and thus cannot offer resources yet");
}
// Basic tests for resource availability for the host
if (internalReallyFreeCaps.getRequiredCPUs() == 0
|| internalReallyFreeCaps.getRequiredMemory() == 0
|| requested.getRequiredProcessingPower()
> internalReallyFreeCaps.getRequiredProcessingPower()) {
return null;
}
// Allocation type test (i.e. do we allow underprovisioning?)
for (int i = 0; i < promisedResources.length; i++) {
ResourceAllocation olderAllocation = promisedResources[i];
if (olderAllocation != null) {
if (olderAllocation.allocated.isRequiredProcessingIsMinimum()
== requested.isRequiredProcessingIsMinimum()) {
break;
} else {
return null;
}
}
}
// Promised resources for the virtual machine
double vmCPU = requested.getRequiredCPUs();
long vmMem = requested.getRequiredMemory();
final double vmPrPow =
requested.isRequiredProcessingIsMinimum()
? totalCapacities.getRequiredProcessingPower()
: requested.getRequiredProcessingPower();
// Actually allocated resources (memory is equivalent in both cases)
final double allocPrPow = totalCapacities.getRequiredProcessingPower();
final double allocCPU = vmCPU * requested.getRequiredProcessingPower() / allocPrPow;
if (0 <= internalReallyFreeCaps.getRequiredCPUs() - allocCPU) {
if (0 <= internalReallyFreeCaps.getRequiredMemory() - requested.getRequiredMemory()) {
return new ResourceAllocation(
new ConstantConstraints(allocCPU, allocPrPow, vmMem),
requested.isRequiredProcessingIsMinimum()
? new ConstantConstraints(vmCPU, vmPrPow, true, vmMem)
: requested,
allocationValidityLength);
} else {
vmMem = internalReallyFreeCaps.getRequiredMemory();
}
} else if (0 <= internalReallyFreeCaps.getRequiredMemory() - requested.getRequiredMemory()) {
vmCPU = internalReallyFreeCaps.getRequiredCPUs();
} else {
vmCPU = internalReallyFreeCaps.getRequiredCPUs();
vmMem = internalReallyFreeCaps.getRequiredMemory();
}
if (strict) {
return null;
} else {
final ResourceConstraints updatedConstraints =
new ConstantConstraints(vmCPU, vmPrPow, requested.isRequiredProcessingIsMinimum(), vmMem);
return new ResourceAllocation(
updatedConstraints, updatedConstraints, allocationValidityLength);
}
}
private boolean checkAllocationsPresence(final ResourceAllocation allocation) {
return promisedResources.length > allocation.myPromisedIndex
&& promisedResources[allocation.myPromisedIndex] == allocation;
}
public boolean cancelAllocation(final ResourceAllocation allocation) {
if (checkAllocationsPresence(allocation)) {
allocation.cancel();
return true;
}
return false;
}
public boolean isHostableRequest(final ResourceConstraints requested) {
return requested.compareTo(totalCapacities) <= 0;
}
public void deployVM(
final VirtualMachine vm, final ResourceAllocation ra, final Repository vaSource)
throws VMManagementException, NetworkNode.NetworkException {
if (checkAllocationsPresence(ra)) {
final VirtualAppliance va = vm.getVa();
final StorageObject foundLocal = localDisk.lookup(va.id);
final StorageObject foundRemote = vaSource == null ? null : vaSource.lookup(va.id);
if (foundLocal != null || foundRemote != null) {
vm.switchOn(ra, vaSource);
} else {
throw new VMManagementException("No VA available!");
}
} else {
throw new VMManagementException("Tried to deploy VM with an expired resource allocation");
}
}
/**
* Initiates a VM on this physical machine. If the physical machine cannot host VMs for some
* reason an exception is thrown, if the machine cannot host this particular VA then a null VM is
* returned.
*
* @param va The appliance for the VM to be created.
* @param rc The resource requirements of the VM
* @param vaSource The storage where the VA resides.
* @param count The number of VMs to be created with the above specification
* @return The virtual machine(s) that will be instantiated on the PM. Null if the constraints
* specify VMs that cannot fit the available resources of the machine.
* @throws VMManagementException If the machine is not accepting requests currently.<br>
* If the VM startup has failed.
*/
public VirtualMachine[] requestVM(
final VirtualAppliance va,
final ResourceConstraints rc,
final Repository vaSource,
final int count)
throws VMManagementException, NetworkException {
final VirtualMachine[] vms = new VirtualMachine[count];
final ResourceAllocation[] ras = new ResourceAllocation[count];
boolean canDeployAll = true;
for (int i = 0; i < count && canDeployAll; i++) {
ras[i] = allocateResources(rc, true, defaultAllocLen);
vms[i] = null;
canDeployAll &= ras[i] != null && ras[i].allocated == rc;
}
if (canDeployAll) {
for (int i = 0; i < count; i++) {
vms[i] = new VirtualMachine(va);
deployVM(vms[i], ras[i], vaSource);
}
} else {
for (int i = 0; i < count && ras[i] != null; i++) {
ras[i].cancel();
}
}
return vms;
}
/**
* Scheduling constraints are ignored currently! As this is too low level to handle them in the
* current state of the simulator.
*/
@Override
public VirtualMachine[] requestVM(
VirtualAppliance va,
ResourceConstraints rc,
Repository vaSource,
int count,
HashMap<String, Object> schedulingConstraints)
throws VMManagementException, NetworkException {
return requestVM(va, rc, vaSource, count);
}
@Override
public void terminateVM(final VirtualMachine vm, final boolean killTasks)
throws NoSuchVMException, VMManagementException {
if (!vms.contains(vm)) {
throw new NoSuchVMException("Termination request was received for an unknown VM");
}
vm.switchoff(killTasks);
}
@Override
public Collection<VirtualMachine> listVMs() {
return publicVms;
}
public int numofCurrentVMs() {
return vms.size();
}
@Override
protected boolean isAcceptableConsumption(final ResourceConsumption con) {
final ResourceSpreader consumer = con.getConsumer();
final boolean internalConsumer =
(consumer == directConsumer)
&& (directConsumerUsageMoratory
? (onOffEvent == null ? false : onOffEvent.currentConsumption == con)
: true);
final boolean runningVirtualMachine;
if (internalConsumer) {
runningVirtualMachine = false;
} else {
if (consumer instanceof VirtualMachine) {
runningVirtualMachine = vms.contains((VirtualMachine) consumer);
} else {
runningVirtualMachine = false;
}
}
return internalConsumer || runningVirtualMachine ? super.isAcceptableConsumption(con) : false;
}
public boolean isHostingVMs() {
return !vms.isEmpty();
}
public long getCompletedVMs() {
return completedVMs;
}
public long getCurrentOnOffDelay() {
if (onOffEvent == null) {
switch (currentState) {
case OFF:
return onDelayEstimate;
case RUNNING:
return offDelayEstimate;
default:
throw new IllegalStateException("The onOffEvent is null while doing switchon/off");
}
} else {
long remainingTime = onOffEvent.transitionStart - Timed.getFireCount();
switch (currentState) {
case SWITCHINGOFF:
remainingTime += offDelayEstimate;
break;
case SWITCHINGON:
remainingTime += onDelayEstimate;
break;
default:
throw new IllegalStateException(
"The onOffEvent is not null while not in switchon/off mode");
}
return remainingTime;
}
}
@Override
public String toString() {
return "Machine(S:"
+ currentState
+ " C:"
+ internalReallyFreeCaps.getRequiredCPUs()
+ " M:"
+ internalReallyFreeCaps.getRequiredMemory()
+ " "
+ localDisk.toString()
+ " "
+ super.toString()
+ ")";
}
public void subscribeStateChangeEvents(final StateChangeListener sl) {
stateListenerManager.subscribeToEvents(sl);
}
public void unsubscribeStateChangeEvents(final StateChangeListener sl) {
stateListenerManager.unsubscribeFromEvents(sl);
}
private void setState(final State newState) {
final State pastState = currentState;
currentState = newState;
directConsumerUsageMoratory = newState != State.RUNNING;
stateListenerManager.notifyListeners(Pair.of(pastState, newState));
// Power state management:
setCurrentPowerBehavior(hostPowerBehavior.get(newState));
// TODO: if the repository class also implements proper power state
// management then this must move there
localDisk.diskinbws.setCurrentPowerBehavior(storagePowerBehavior.get(newState));
localDisk.diskoutbws.setCurrentPowerBehavior(storagePowerBehavior.get(newState));
localDisk.inbws.setCurrentPowerBehavior(networkPowerBehavior.get(newState));
localDisk.outbws.setCurrentPowerBehavior(networkPowerBehavior.get(newState));
}
public ResourceConstraints getCapacities() {
return totalCapacities;
}
@Override
public void subscribeToCapacityChanges(final CapacityChangeEvent<ResourceConstraints> e) {
// FIXME: not important yet
}
@Override
public void unsubscribeFromCapacityChanges(final CapacityChangeEvent<ResourceConstraints> e) {
// FIXME: not important yet
}
public void subscribeToIncreasingFreeapacityChanges(
final CapacityChangeEvent<ResourceConstraints> e) {
increasingFreeCapacityListenerManager.subscribeToEvents(e);
;
}
public void unsubscribeFromIncreasingFreeCapacityChanges(
final CapacityChangeEvent<ResourceConstraints> e) {
increasingFreeCapacityListenerManager.unsubscribeFromEvents(e);
}
public boolean isDirectConsumerUsageMoratory() {
return directConsumerUsageMoratory;
}
}
/**
* Ensures the requested amount of resources are going to be available in the foreseeable future
* on this physical machine.
*
* @param requested The amount of resources needed by the caller
* @return With a time limited offer on the requested resources. If the requested
* resourceconstraints cannot be met by the function then it returns with the maximum amount
* of resources it can serve. If there are no available resources it returns with <i>null</i>!
* If the requested resources are available then the original requested resourceconstraints
* object is stored in the returned resource allocation. If the resourceconstraints only
* specified a minimum resource limit, then a new resourceconstraints object is returned with
* details of the maximum possible resource constraints that can fit into the machine.
*/
public ResourceAllocation allocateResources(
final ResourceConstraints requested, final boolean strict, final int allocationValidityLength)
throws VMManagementException {
if (!currentState.equals(State.RUNNING)) {
throw new VMManagementException("The PM is not running and thus cannot offer resources yet");
}
// Basic tests for resource availability for the host
if (internalReallyFreeCaps.getRequiredCPUs() == 0
|| internalReallyFreeCaps.getRequiredMemory() == 0
|| requested.getRequiredProcessingPower()
> internalReallyFreeCaps.getRequiredProcessingPower()) {
return null;
}
// Allocation type test (i.e. do we allow underprovisioning?)
for (int i = 0; i < promisedResources.length; i++) {
ResourceAllocation olderAllocation = promisedResources[i];
if (olderAllocation != null) {
if (olderAllocation.allocated.isRequiredProcessingIsMinimum()
== requested.isRequiredProcessingIsMinimum()) {
break;
} else {
return null;
}
}
}
// Promised resources for the virtual machine
double vmCPU = requested.getRequiredCPUs();
long vmMem = requested.getRequiredMemory();
final double vmPrPow =
requested.isRequiredProcessingIsMinimum()
? totalCapacities.getRequiredProcessingPower()
: requested.getRequiredProcessingPower();
// Actually allocated resources (memory is equivalent in both cases)
final double allocPrPow = totalCapacities.getRequiredProcessingPower();
final double allocCPU = vmCPU * requested.getRequiredProcessingPower() / allocPrPow;
if (0 <= internalReallyFreeCaps.getRequiredCPUs() - allocCPU) {
if (0 <= internalReallyFreeCaps.getRequiredMemory() - requested.getRequiredMemory()) {
return new ResourceAllocation(
new ConstantConstraints(allocCPU, allocPrPow, vmMem),
requested.isRequiredProcessingIsMinimum()
? new ConstantConstraints(vmCPU, vmPrPow, true, vmMem)
: requested,
allocationValidityLength);
} else {
vmMem = internalReallyFreeCaps.getRequiredMemory();
}
} else if (0 <= internalReallyFreeCaps.getRequiredMemory() - requested.getRequiredMemory()) {
vmCPU = internalReallyFreeCaps.getRequiredCPUs();
} else {
vmCPU = internalReallyFreeCaps.getRequiredCPUs();
vmMem = internalReallyFreeCaps.getRequiredMemory();
}
if (strict) {
return null;
} else {
final ResourceConstraints updatedConstraints =
new ConstantConstraints(vmCPU, vmPrPow, requested.isRequiredProcessingIsMinimum(), vmMem);
return new ResourceAllocation(
updatedConstraints, updatedConstraints, allocationValidityLength);
}
}
