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Re: [GridSim-users] To dear Agustin, To dear All ( a question bout GridSim )
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From: <smp...@ya...> - 2007-10-02 22:25:09
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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 am sorry that I am not in school now so I have to use my PC mail-address this time.
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.
bestwishes,
yang,
--------------------------------------------------
_/*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,100);
// pe.setMIPSRating(1000);}
/* to check that they are changed or not*/
for(int i=0;i<num;i++){
rate_changed=pelist.getMIPSRating(i);
}
}
--------------------------------------------------
Agust醇^n Caminero Herraez <ag...@ds...> wrote:
Hello YangYu,
Sorry for the late reply, but I've been busy these days.
I think that what you say can be done in a similar way as the resource
failure functionality.
This is, computing resources could change the speed of their PEs in
response to an event.
If you do this, you should consider the allocation policy in place, as
in the body function of the space-shared allocation policy the rating of
the PEs of the resource are retrieved.
So, more concretely, the GridResource class should receive the event
(perhaps the event could be sent by the GIS, as in the resource
failure). Then, update the PE class with the new rating by going through
the ResourceCharacteristics class, to the MachineList, to the PEList
until you get to the actual PE you want to modify. If you use
SpaceShared policy, update the PEs rating also in this class.
Normally, allocation policies consider that all the PEs of the same
machine are identical, so you should take it into account when changing
the PE rating, and keep it always like that.
Hope that this is useful. Do not hesitate to ask again if you still have
doubts.
Regards,
Agustin
yangyu escribi将ム:
> hi,Thank you for your help !!
> It took me time to read and run the examples.
> I am sorry to re-mail you late,infact I do not know how to explain my doubts
> to you by this mailing list.
>
> I want to chage the speed of PEs or machines dynamicly.
> for example,change a pe`s rating from 100 to 500 when the simulation is
> running.
> Not to mean that make the machine down(speed/performance=0?).
>
> Thank you very much .
>
>
> yours,
>
>
> Hi,
>
> When you say dynamic performance, what do you actually mean?
>
> Because since the current (4.1) version of GridSim, computing resources
> may fail. This is, machines belonging to computing resources may work for
> some time, then stop working for some time, and then back again to work.
>
> Thus, the performance of the computing resources may change dynamically,
> if you use this computing resource failure functionality.
>
> For instructions on how to use this functionality, please take a look at
> http://www.gridbus.org/gridsim/example/resFailure_index.html
> where there are examples on how to use it.
>
> Also, take a look into these addresses:
>
> http://www.gridbus.org/reports/GridSim-FailureHandling-2007.pdf
>
> http://www.dsi.uclm.es/descargas/thecnicalreports/DIAB-07-01-1/DIAB-07-01-1.
> pdf
>
> Let me know if this answers your doubts,
>
> Regards,
>
> Agustin
>
>
>
>> Dear All,
>>
>> I am sorry to take you time to read my mail.
>> I hope I can get your help.
>>
>> I want to know whether the GridSim support to creat dynamic performance
>> machines or not?
>>
>>
>> Thank you very much.
>> Bestwishes,
>>
>> Y.Y
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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/
> ========================================================
>
>
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Microsoft
> Defy all challenges. Microsoft(R) Visual Studio 2005.
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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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