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Re: [GridSim-users] about dynamic performance. and a question of setting resourceID
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From:
<ag...@ds...> - 2007-10-05 10:21:17
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Hello Yang Yu,
yangyu escribió:
> Hello Dear Agustin,
>
> Thank you very much for you kindness and your help to me.
> I just had a try. I found that there is some problem in that code.
> ------------------------------------------
> for(int i=0;i<num;i++) {
> // get a PE of this resource
> // something like:
> // pe= pelist.get(i);
> // then change the rating
> pe.setMIPSRating(1000);
> }
> ------------------------------------------
> The prolem is with the code "pe.setMIPSRating(1000);" when compling .
> some information like "pe is not defined symbol" was shown.
>
> To work out this, at the head of my class I wrote "public static PE pe; " (I am not sure of it, just a try).
>
Of course, pe must be declared before being used. I think that "public
PE pe; " is ok.
> and the Compling is passed, but when it run to the code "pe.setMIPSRating(1000); ", the program will be stopped and throws a message of "java.lang.NullPointerException".
>
> I thought that when the excution of program runs to " pe.setMIPSRating(1000);" to set the PE with a new_speed, maybe Program can not know which PE`s speed is going to be re-setted. (As the message of NullPointerException) .
>
> And I also tried to use " pe= pelist.get(i);" , but a error message like "java.lang.Objct can not be setted as gridsim.PE" was shown.
>
>
Of course, before trying to set the speed of a PE, you must decide which
PE you want to set. In order to do that, you must go through the PEList,
which is what I meant in the code I sent you. Probably the failure is
that "pelist.get(i); " returns a Object, so try doing a casting to PE,
such as "pe= (PE) pelist.get(i);".
Hope this helps,
Agustin
> I really want to say "Thank you very much for your help to me. you are so kind", though I can not run your code correctly.
>
>
> I will go on to find how to change the performance(speed of PE).
>
>
> And if you have some new information about change speed of PE, I `d like to read and try it.
>
>
> Thanks a lot,
>
> best wishes to you.
>
>
> Yang Yu
>
>
>
>
>
>
> -----Original Message-----
> From: Agustin Caminero Herraez [mailto:ag...@ds...]
> Sent: Friday, October 05, 2007 4:39 PM
> To: yangyu
> Cc: gri...@li...
> Subject: Re: [GridSim-users] about dynamic performance. and a question
> of setting resourceID
>
>
> Hello Yang Yu,
>
> I've just taken a look at your example, and I'm afraid that what you do
> is not correct.
> I mean, you are not changing the rating of PEs, but just creating new PEs.
>
> So, try doing this:
>
> public void changePE(){
> int rate=0;
> int rate_changed=0;
> PEList pelist=resource.getMachineList().getMachine(0).getPEList();
> int num=resource.getNumPE();
>
>
> /*to see the rate of PEs before change them. there were 6PEs and each PE~s
> speed is 200*/
> for(int i=0;i<num;i++){
> rate=pelist.getMIPSRating(i);
> }
>
> /* try to change speed to 1000 */
> for(int i=0;i<num;i++) {
> // get a PE of this resource
> // something like:
> // pe= pelist.get(i);
> // then change the rating
> pe.setMIPSRating(1000);
> }
>
>
>
> /* to check that they are changed or not*/
>
> for(int i=0;i<num;i++)
> {
> rate_changed=pelist.getMIPSRating(i);
> //rate_changed is same as rate.
> }
> }
>
>
> Tell me if this works,
>
> Regards,
>
> Agustin
>
>
> yangyu escribió:
>
>> Good morning Agustin,
>> Good morning everyone,
>>
>>
>> Thank you very much for the information you gave to me.
>> I am happy to hear that the speed of PEs can be changed when the simulation
>> is running.
>>
>> I just tried one way to change the speed of PEs. It seems that it does not
>> work .(Forgive me if I chose a wrong way to write the code) I am not sure
>> the method I used is right or not.
>> Can you tell me why I can not change the speed(rating) of PEs when you are
>> not busy?
>>
>> Thank you very much.
>>
>> PS. I found that in the Class ResourceCharacteristics, the method
>> setResourceID(int id) does not work.(I can not make resources ID as I want
>> them to be.)
>>
>> (I am sorry that I sent this question to "GridSim-users] help regarding
>> compiling.............". 10minuts ago.I am so sorry about that.)
>>
>> bestwishes,
>> yang,
>> ---------the code--------------------------------------------------
>> _/*I ran this program step by step to see "rate"and "rate_change".I found
>> that they were same*/
>> public void changePE(){
>> int rate=0;
>> int rate_changed=0;
>> PEList pelist=resource.getMachineList().getMachine(0).getPEList();
>> int num=resource.getNumPE();
>>
>>
>> /*to see the rate of PEs before change them. there were 6PEs and each PE~s
>> speed is 200*/
>> for(int i=0;i<num;i++){
>> rate=pelist.getMIPSRating(i);
>> }
>>
>>
>> /* try to change speed to 1000 using the method that I know*/
>> for(int i=0;i<num;i++) {
>> pelist.add(new PE(i,1000));
>>
>> // PE pe=new PE(i,1000);
>> // pe.setMIPSRating(1000);
>> }
>> MachineList mList = new MachineList();
>> mList.add( new Machine(0, pelist) );
>> String arch = "Sun Ultra"; // system architecture
>> String os = "Solaris"; // operating system
>> double time_zone = 0.0; // time zone this resource located
>> ResourceCharacteristics resource = new ResourceCharacteristics(
>> arch, os, mList, ResourceCharacteristics.SPACE_SHARED,
>> time_zone, 1);
>>
>> // PEList pelist1=resource.getMachineList().getMachine(0).getPEList();
>> /* to check that they are changed or not*/
>> for(int i=0;i<num;i++)
>> {
>> // rate_changed=pelist1.getMIPSRating(i)
>> rate_changed=pelist.getMIPSRating(i);
>> //rate_changed is same as rate.
>> }
>> }
>> --------------------------------------------------
>>
>>
>>
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>>
>
>
--
========================================================
Agustin Caminero-Herraez
PhD Student
Computing Systems Department
The University of Castilla La Mancha, Albacete. Spain.
Phone: +34 967 599200 Ext. 2693. Fax : +34 967 599224
http://www.i3a.uclm.es/
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