Dear Azin,
Using a thread will not work as you expect.
I think that what you want can be implemented in the following
manner. You can create a GridSim entity that submits the gridlets as
you have already created. However, this entity may submit a new
Gridlet whenever a given internal event is received. As an example, I
am providing some sample code wherein the entity schedules a new
Gridlet whenever another returns. The entity's body method would look
like this:
public void body() {
...
int numofGrls = 10;
int grlReceived = 0;
Sim_event ev = new Sim_event();
while (grlReceived < numofGrls) {
super.sim_get_next(ev);
if(ev.get_src() == super.get_id() &&
ev.get_tag() == SUBMIT_ONE_MORE_GRIDLET) {
// Submit the gridlet here...
super.gridletSubmit(gridlet, resID);
}
else if (ev.get_tag() == GridSimTags.GRIDLET_RETURN) {
// add the gridlet to a list, print it or do whatever is required
here...
grlReceived++;
super.sim_schedule(super.get_id(),
GridSimTags.SCHEDULE_NOW, SUBMIT_ONE_MORE_GRIDLET);
}
}
...
}
where SUBMIT_ONE_MORE_GRIDLET is just a new tag defined in the class:
private static final int SUBMIT_ONE_MORE_GRIDLET = 5000;
I think this might give you an idea on how it works.
Regards,
Marcos
On 16/06/2008, at 12:48 PM, Azin Moallem wrote:
> Hi,
>
> I have a question simulating a scheduling algorithm using GridSim
> and I
> would be greatful to hear back.
>
> I need to simulate a dynamic job submission. I mean while gridlets are
> being submitted to the grid, completed gridlets are being sent back to
> users. To do this I am simulating submission of gridlets in the body
> function of a GridSim entity and receiving back the gridlets is the
> responsibilty of a Thread which I have created myself.
>
> The problem is gridletReceive() always returns null ! and I see this
> output: "Sim_system: No more future events" early in my simulation.
>
> how can i simulate a dynamic job submission environment ?
>
>
> Best,
> Azin
>
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