[GridSim-users] About dynamic performance and set resourceID

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Good morning Agustin,
Good morning everyone,

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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?
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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.)

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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=3D0;
    int rate_changed=3D0;
    PEList pelist=3Dresource.getMachineList().getMachine(0).getPEList();
    int num=3Dresource.getNumPE();

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/*to see the rate of PEs before change them. there were 6PEs and each =
PE~s speed is 200*/
  for(int i=3D0;i<num;i++){
     rate=3Dpelist.getMIPSRating(i);
   }

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/* try to change speed to 1000 using the method that I know*/
  for(int i=3D0;i<num;i++) {
                                  pelist.add(new PE(i,1000));

			//      PE pe=3Dnew PE(i,1000);
			//      pe.setMIPSRating(1000);
  			}
  MachineList mList =3D new MachineList();
  mList.add( new Machine(0, pelist) );
  String arch =3D "Sun Ultra";      // system architecture
         String os =3D "Solaris";          // operating system
         double time_zone =3D 0.0;         // time zone this resource =
located
  ResourceCharacteristics resource =3D new ResourceCharacteristics(
                    arch, os, mList, =
ResourceCharacteristics.SPACE_SHARED, time_zone, 1);

// PEList pelist1=3Dresource.getMachineList().getMachine(0).getPEList();
/* to check that they are changed or not*/  =20
                       for(int i=3D0;i<num;i++)
                              {
                              // rate_changed=3Dpelist1.getMIPSRating(i)
                               rate_changed=3Dpelist.getMIPSRating(i); =
//rate_changed is same as rate.=20
                              }
}
--------------------------------------------------

Agust=E9=86=87^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=20
failure functionality.
This is, computing resources could change the speed of their PEs in=20
response to an event.

If you do this, you should consider the allocation policy in place, as=20
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=20
(perhaps the event could be sent by the GIS, as in the resource=20
failure). Then, update the PE class with the new rating by going through =

the ResourceCharacteristics class, to the MachineList, to the PEList=20
until you get to the actual PE you want to modify. If you use=20
SpaceShared policy, update the PEs rating also in this class.

Normally, allocation policies consider that all the PEs of the same=20
machine are identical, so you should take it into account when changing=20
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=E5=B0=86=E3=83=A0:
> 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=3D0?).
>
> 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
>
>
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>> 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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>
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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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=3D=3D=3D=3D=3D=3D
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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=3D=3D=3D=3D=3D=3D

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org;quoted-printable:Universidad de Castilla La Mancha =
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n.;;Instituto de Investigaci=3DC3=3DB3n en Inform=3DC3=3DA1tica de =
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email;internet:ag...@ds...
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