Package org.cloudbus.cloudsim.cloudlets.network

Class CloudletExecutionTask

java.lang.Object
org.cloudbus.cloudsim.cloudlets.network.CloudletTask
org.cloudbus.cloudsim.cloudlets.network.CloudletExecutionTask
All Implemented Interfaces:
Identifiable
public class CloudletExecutionTask
extends CloudletTask
A processing task that can be executed by a NetworkCloudlet in a single Pe. The tasks currently just execute in a sequential manner.

Please refer to following publication for more details:

Since:
CloudSim Toolkit 1.0
Author:
Saurabh Kumar Garg, Manoel Campos da Silva Filho
To do something:
Each execution task must use just a single core. It may represent a thread (so the name of the class would be changed). By this way, a execution task should use only one core. However, tasks may be executed in parallel (considering there are multiple cores) and/or sequentially. This feature has to be included in the class. One proposal is to create a int group attribute. All tasks (not only execution tasks) that have the group equals to zero are executed sequentially (that means they aren't grouped). The tasks that have the same group have to be executed in parallel, one in each CPU core (PE). All tasks into a group will be executed together. The next group starts only when all the tasks in the prior finishes (each task can have a different length, so may finish in different times). The value of the group define the tasks execution order. Tasks with lower group number are executed first. You can have single tasks (that are not grouped) between grouped tasks (defining the order that this single task executes) just assigning a group number to it and making sure to not add other tasks with the same group. For instance, consider the tasks below, represented by their group number, for a NetworkCloudlet with 4 cores: 0 0 1 1 1 1 2 3 3 there are 2 ungrouped tasks (0) that will be executed sequentially, 4 tasks of group 1 that will be executed in parallel after all ungrouped tasks, there is a single task at group 2 that will be executed after the group 1 and finally there is 2 tasks at group 2 to be executed in parallel at the end. When adding a task to a NetworkCloudlet, the addTask method has to check if the current number of tasks for the group (that represents parallel tasks) is lower than the number of NetworkCloudlet's PEs.

  • Constructor Details

    • CloudletExecutionTask

      public CloudletExecutionTask​(int id, long executionLength)
      Creates a new task.
      Parameters:
      id - task id
      executionLength - the execution length of the task (in MI)

  • Method Details

    • getLength

      public long getLength()
      Gets the execution length of the task (in MI).
      Returns:

    • setLength

      public void setLength​(long length)
      Sets the execution length of the task (in MI).
      Parameters:
      length - the length to set

    • getTotalExecutedLength

      public long getTotalExecutedLength()
      Gets the length of this CloudletTask that has been executed so far (in MI).
      Returns:

    • process

      public boolean process​(long partialFinishedMI)
      Sets a given number of MI to the total MI executed so far by the cloudlet.
      Parameters:
      partialFinishedMI - the partial executed length of this Cloudlet (in MI)
      Returns: