Package org.cloudbus.cloudsim.power.models

Interface PowerModel

All Superinterfaces:
PowerAware
All Known Implementing Classes:
PowerModelAbstract, PowerModelCubic, PowerModelLinear, PowerModelSimple, PowerModelSpecPower, PowerModelSpecPowerHpProLiantMl110G3PentiumD930, PowerModelSpecPowerHpProLiantMl110G4Xeon3040, PowerModelSpecPowerHpProLiantMl110G5Xeon3075, PowerModelSpecPowerIbmX3250XeonX3470, PowerModelSpecPowerIbmX3250XeonX3480, PowerModelSpecPowerIbmX3550XeonX5670, PowerModelSpecPowerIbmX3550XeonX5675, PowerModelSqrt, PowerModelSquare
public interface PowerModel
extends PowerAware
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 power consumption data is return in Watt-Second (Ws), which is just in a different scale than the usual Kilowatt-Hour (kWh).

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:

Since:
CloudSim Toolkit 2.0
Author:
Anton Beloglazov, Manoel Campos da Silva Filho

  • Field Summary

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

  • Method Summary

    Modifier and Type Method Description
    double getEnergyLinearInterpolation​(double fromUtilization, double toUtilization, double time)
    Gets an estimation of energy consumption using linear interpolation of the utilization change for a given time interval.
    Host getHost()  
    double getMaxPower()
    Gets the max power that can be supplied by the host in Watts (W).
    double getPower​(double utilization)
    Gets the power supply in Watts (W), according to the utilization percentage of a critical resource, such as CPU (which is currently the only resource considered).
    void setHost​(Host host)  

    Methods inherited from interface org.cloudbus.cloudsim.power.models.PowerAware

    getPower, getPowerInKWatts

  • Field Details

    • NULL

      static final PowerModel NULL
      A property that implements the Null Object Design Pattern for Host objects.

  • Method Details

    • getHost

      Host getHost()

    • setHost

      void setHost​(Host host)

    • getMaxPower

      double getMaxPower()
      Gets the max power that can be supplied by the host in Watts (W).
      Returns:
      the max power supply in Watts (W)

    • getPower

      double getPower​(double utilization) throws java.lang.IllegalArgumentException
      Gets the power supply in Watts (W), according to the utilization percentage of a critical resource, such as CPU (which is currently the only resource considered).
      Parameters:
      utilization - the utilization percentage (between [0 and 1]) of a resource that impacts power supply.
      Returns:
      the power supply in Watts (W)
      Throws:
      java.lang.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 for a given time interval. 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 span (in seconds) between the initial and final utilization to compute the energy consumption
      Returns:
      the estimated energy consumption in Watts-sec (Ws)