Package de.rss.fachstudie.MiSim.resources.cpu

Class CPUProcess

java.lang.Object
de.rss.fachstudie.MiSim.resources.cpu.CPUProcess
All Implemented Interfaces:
Comparable<CPUProcess>
public final class CPUProcess
extends Object
implements Comparable<CPUProcess>
Data-class that contains information about a currently running (or potentially finished) process.

More specifically, it concentrates on holding information about the total work units totally needed and left to complete the process. Further, there are methods to manipulate the later.

For the purpose of compatibility (e.g. non impacting operations) a demand of 0 is allowed.

Author:
Lion Wagner

  • Constructor Details

    • CPUProcess

      public CPUProcess​(int demandTotal)
      Constructor that can be used to create artificial load onto the system
      Parameters:
      demandTotal - load in simulation units

    • CPUProcess

      public CPUProcess​(Request request)
      Creates a CPUProcess for the given Request.
      Parameters:
      request - Request that should be represent by this process.

  • Method Details

    • getDemandTotal

      public int getDemandTotal()

    • getDemandRemainder

      public int getDemandRemainder()
      Returns:
      the remaining demand units before the start of the latest burst.

    • getDemandRemainder

      public double getDemandRemainder​(desmoj.core.simulator.TimeInstant peekTime, int computingCapacityPerTimeUnit)
      Calculates the time/work left for the current burst of this processes at the specific point int time.

      Specifically returns: Remainder at start of Burst - (peekTime - startTime) * computingCapacityPerTimeUnit

      Parameters:
      peekTime - time for which the current remainder should be calculated
      computingCapacityPerTimeUnit - computing capacity of a thread per time unit
      Returns:
      the remaining demand of the currently handled process

    • getRequest

      public Request getRequest()

    • compareTo

      public int compareTo​(CPUProcess o)
      Natural sorting is based on left over demand.
      Specified by:
      compareTo in interface Comparable<CPUProcess>

    • reduceDemandRemainder

      public void reduceDemandRemainder​(int amount)
      Parameters:
      amount - value by which the demand remainder should be reduced
      Throws:
      IllegalArgumentException - if the given amount is larger than the demand remainder.

    • stampCurrentBurstStarted

      public void stampCurrentBurstStarted​(desmoj.core.simulator.TimeInstant start)
      Stamps the start of the next cpu burst.
      Parameters:
      start - time when the burst started.

    • cancel

      public void cancel()
      Cancels the current Burst of the this process and reset its progress.

    • setCurrentBurstCompletionEvent

      public void setCurrentBurstCompletionEvent​(ComputationBurstCompletedEvent currentBurstCompletionEvent)
      Sets the event, that should be executed upon the next completion of a burst of this process.
      Parameters:
      currentBurstCompletionEvent - event, that should be executed upon the next completion of a burst of this process.