Re: [GridSim-developers] [GridSim-users] Extending GridSim Reg-JR

[Marcos D. de A. <ma...@cs...>]

Dear Ye,

The snippets of code seem ok. Please make sure that you are shutting  
down the user entities and have provided the correct number of users  
in the initialisation of GridSim.

If that does not work,  I am just wondering if you could provide us  
with more details about the code?

Regards,

Marcos


On 10/02/2009, at 8:40 AM, ye huang wrote:

> Hi,
> Actually, I think the problem also exists upon gridsim itself (or i  
> haven't understood it well so far).
>
> I encountered a similar problem by extend the Example code of  
> gridsim itself, which i had also submitted to the maillist.  
> Unfortunately, no one replied that last time. The following is the  
> details:
>
> --- ---- [start] --------------
> However, I find another confusing "bug", it's about the way of  
> receiving gridlet sent back from resources. Here i am going to  
> explain it using a demo from GridSim's official example file:  
> Example 04:
>
> Starting from line 109 of Example 04, submitting and receiving  
> gridlets are finished in one loop as follows:
> --- code snippet 1 ---
>
> for (int i = 0; i < this.list_.size(); i++)
> {
>     gridlet = (Gridlet) this.list_.get(i);
>     info = "Gridlet_" + gridlet.getGridletID();
>
>     super.gridletSubmit(gridlet, resourceID);
>
>     gridlet = super.gridletReceive();
>     this.receiveList_.add(gridlet);
> }
>
> In my scenario, in order the decouple the behavior, I split the  
> procedure into two parts as follows:
>
> --- code snippet 2 ---
>
> // part 1: submit gridlet
> for (int i = 0; i < this.list_.size(); i++)
> {
>     gridlet = (Gridlet) this.list_.get(i);
>     info = "Gridlet_" + gridlet.getGridletID();
>
>    super.send(resourceID, GridSimTags.SCHEDULE_NOW,
>                   GridSimTags.GRIDLET_SUBMIT, gridlet);
>
> }
>
> // part 2: receive gridlet from gridresource
> Sim_event ev = new Sim_event();
> while (Sim_system.running()) {
>     super.sim_get_next(ev);
>
> 	if (ev.get_tag() == GridSimTags.GRIDLET_RETURN){
> 		gridlet = (Gridlet) ev.get_data();
>
>         // stores the received Gridlet into a new GridletList object
>         this.receiveList_.add(gridlet);
>     }
> 	
> }
>
> // part 3, print the received gridlet list
> printGridletList(this.receiveList_);
>
> ---
>
> Then, during the execution, I got the prompted warning :
> Resource_0: Warning - Gridlet #2 owned by Example4 is already  
> completed/finished.
>
> The more gridlets were submitted, the more warning will be prompted.
>
> I have to say, it seems there is no mistake caused by this warning.  
> But to understand the infrastructure better, is there anyone could  
> help me about why it appears and how to avoid it?
>
> --- ---- [end] --------------
>
> Regards
> ye
>
>
> On 9 Feb, 2009, at 6:09 PM, Jeyarani Rajarathinam wrote:
>
>> Hi Friends,
>>     I am using GridSim4.0 and I have  created new internal policy  
>> instead
>> of FCFS. I get the following error. Please help me to correct the  
>> problem
>>
>> JR
>> I have submitted 4 gridlets  and the fourth gridlet is small  
>> compared to
>> rest.
>>
>> Sim_system: No more future events
>> Gathering simulation data.
>> GridResource_0: Warning - Gridlet #3 owned by User_0 is already
>> completed/finish
>> ed.Exception in thread "Thread-9"
>> java.lang.NullPointerExceptionTherefore, it is not being executed  
>> again
>>
>>        at Example8.body(Example8.java:107)
>>
>>        at eduni.simjava.Sim_entity.run(Sim_entity.java:603)
>> --------------------------------------------------------------------- 
>> ---------
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>> _______________________________________________
>> Gridsim-developers mailing list
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>> https://lists.sourceforge.net/lists/listinfo/gridsim-developers
>
>
> --
>
> Ye Huang, Department of Informatics
> University of Fribourg / Pérolles 2 - Bld de Pérolles 90
> 1700 Fribourg, Switzerland
>
> e-mail: ye....@he...,  ye....@un...
> http://diuf.unifr.ch/people/huangy/
> Office: +41 26 429 65 95
>
>
>
>
> ---------------------------------------------------------------------- 
> --------
> Create and Deploy Rich Internet Apps outside the browser with Adobe 
> (R)AIR(TM)
> software. With Adobe AIR, Ajax developers can use existing skills  
> and code to
> build responsive, highly engaging applications that combine the  
> power of local
> resources and data with the reach of the web. Download the Adobe  
> AIR SDK and
> Ajax docs to start building applications today-http://p.sf.net/sfu/ 
> adobe-com_______________________________________________
> Gridsim-users mailing list
> Gri...@li...
> https://lists.sourceforge.net/lists/listinfo/gridsim-users

Marcos Dias de Assuncao
Grid Computing and Distributed Systems (GRIDS) Laboratory
Department of Computer Science and Software Engineering
The University of Melbourne, Australia
Email: ma...@cs...

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