org.cloudbus.cloudsim.power.models

Interface PowerModel

All Known Implementing Classes:

PowerModelAbstract, PowerModelCubic, PowerModelLinear, PowerModelSimple, PowerModelSpecPower, PowerModelSpecPowerHpProLiantMl110G3PentiumD930, PowerModelSpecPowerHpProLiantMl110G4Xeon3040, PowerModelSpecPowerHpProLiantMl110G5Xeon3075, PowerModelSpecPowerIbmX3250XeonX3470, PowerModelSpecPowerIbmX3250XeonX3480, PowerModelSpecPowerIbmX3550XeonX5670, PowerModelSpecPowerIbmX3550XeonX5675, PowerModelSqrt, PowerModelSquare

public interface PowerModel

Provides a model for power consumption of hosts, depending on utilization of a critical system component, such as CPU. This is the fundamental class to enable power-aware Hosts. However, a Host just provides power usage data if a PowerModel is set using the Host.setPowerModel(PowerModel).

The interface implements the Null Object Design Pattern in order to start avoiding NullPointerException when using the NULL object instead of attributing null to PowerModel variables.

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

Since:

CloudSim Toolkit 2.0

Author:

Anton Beloglazov, Manoel Campos da Silva Filho

Field Summary

Fields

Modifier and Type	Field and Description
static PowerModel	NULL A property that implements the Null Object Design Pattern for Host objects.

Method Summary

Modifier and Type	Method and Description
double	getEnergyLinearInterpolation(double fromUtilization, double toUtilization, double time) Gets an estimation of energy consumption using linear interpolation of the utilization change.
Host	getHost()
double	getMaxPower() Gets the max power that can be consumed by the host (in Watts/Second).
double	getPower() Gets the current power consumption of the host (in Watts/Second).
double	getPower(double utilization) Gets power consumption (in Watts/Second) of the Power Model, according to the utilization percentage of a critical resource, such as CPU.
void	setHost(Host host)

Field Detail

NULL

static final PowerModel NULL

A property that implements the Null Object Design Pattern for Host objects.

Method Detail

getHost

Host getHost()

setHost

void setHost(Host host)

getMaxPower

double getMaxPower()

Gets the max power that can be consumed by the host (in Watts/Second).

Returns:

the max consumption power (in Watts/Second)

getPower

double getPower()

Gets the current power consumption of the host (in Watts/Second). For this moment, it only computes the power consumed by Pes.

Returns:

the power consumption (in Watts/Second)

getPower

double getPower(double utilization)
         throws IllegalArgumentException

Gets power consumption (in Watts/Second) of the Power Model, according to the utilization percentage of a critical resource, such as CPU.

Parameters:

utilization - the utilization percentage (between [0 and 1]) of a resource that is critical for power consumption.

Returns:

the power consumption (in Watts/Second)

Throws:

IllegalArgumentException - when the utilization percentage is not between [0 and 1]

getEnergyLinearInterpolation

double getEnergyLinearInterpolation(double fromUtilization,
                                    double toUtilization,
                                    double time)

Gets an estimation of energy consumption using linear interpolation of the utilization change. It's required to set a PowerModel in order to get power usage data.

Parameters:

fromUtilization - the initial utilization percentage

toUtilization - the final utilization percentage

time - the time

Returns:

the estimated energy consumption