Package org.cloudbus.cloudsim.schedulers.vm

Class VmSchedulerSpaceShared

java.lang.Object

org.cloudbus.cloudsim.schedulers.vm.VmSchedulerAbstract

org.cloudbus.cloudsim.schedulers.vm.VmSchedulerSpaceShared

All Implemented Interfaces:

VmScheduler

public class VmSchedulerSpaceShared
extends VmSchedulerAbstract

VmSchedulerSpaceShared is a VMM allocation policy that allocates one or more PEs from a host to a Virtual Machine Monitor (VMM), and doesn't allow sharing of PEs. The allocated PEs will be used until the VM finishes running. If there is no enough free PEs as required by a VM, or whether the available PEs doesn't have enough capacity, the allocation fails. In the case of fail, no PE is allocated to the requesting VM.

Since:

CloudSim Toolkit 1.0

Author:

Rodrigo N. Calheiros, Anton Beloglazov, Manoel Campos da Silva Filho

Field Summary

Fields inherited from interface org.cloudbus.cloudsim.schedulers.vm.VmScheduler

DEF_VM_MIGRATION_CPU_OVERHEAD, LOGGER, NULL

Constructor Summary

Constructors

Constructor	Description
VmSchedulerSpaceShared()	Creates a space-shared VM scheduler.
VmSchedulerSpaceShared(double vmMigrationCpuOverhead)	Creates a space-shared VM scheduler, defining a CPU overhead for VM migration.

Method Summary

Modifier and Type	Method	Description
boolean	allocatePesForVmInternal(Vm vm, MipsShare requestedMips)
protected long	deallocatePesFromVmInternal(Vm vm, int pesToRemove)
protected boolean	isSuitableForVmInternal(Vm vm, MipsShare requestedMips)

Methods inherited from class org.cloudbus.cloudsim.schedulers.vm.VmSchedulerAbstract

allocatePesForVm, allocatePesForVm, deallocatePesFromVm, deallocatePesFromVm, getAllocatedMips, getHost, getMaxCpuUsagePercentDuringOutMigration, getMipsShareRequestedReduced, getPeCapacity, getRequestedMips, getTotalAllocatedMipsForVm, getTotalAvailableMips, getVmMigrationCpuOverhead, getWorkingPeList, isSuitableForVm, isSuitableForVm, percentOfMipsToRequest, removePesFromVm, setHost

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

VmSchedulerSpaceShared

public VmSchedulerSpaceShared()

Creates a space-shared VM scheduler.

VmSchedulerSpaceShared

public VmSchedulerSpaceShared(double vmMigrationCpuOverhead)

Creates a space-shared VM scheduler, defining a CPU overhead for VM migration.

Parameters:

vmMigrationCpuOverhead - the percentage of Host's CPU usage increase when a VM is migrating in or out of the Host. The value is in scale from 0 to 1 (where 1 is 100%).

Method Details

isSuitableForVmInternal

protected boolean isSuitableForVmInternal(Vm vm,
 MipsShare requestedMips)

Specified by:

isSuitableForVmInternal in class VmSchedulerAbstract

allocatePesForVmInternal

public boolean allocatePesForVmInternal(Vm vm,
 MipsShare requestedMips)

Specified by:

allocatePesForVmInternal in class VmSchedulerAbstract

deallocatePesFromVmInternal

protected long deallocatePesFromVmInternal(Vm vm,
 int pesToRemove)

Specified by:

deallocatePesFromVmInternal in class VmSchedulerAbstract