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Re: [GridSim-users] about dynamic performance. and a question of setting resourceID
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From: yangyu <ya...@hp...> - 2007-10-05 10:04:22
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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=3D0;i<num;i++) { =20
// get a PE of this resource=20
// something like:
// pe=3D pelist.get(i); =20
// then change the rating
pe.setMIPSRating(1000); =09
}
------------------------------------------
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).
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=3D pelist.get(i);" , but a error message =
like "java.lang.Objct can not be setted as gridsim.PE" was shown.
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=20
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=3D0;
int rate_changed=3D0;
PEList pelist=3Dresource.getMachineList().getMachine(0).getPEList();
int num=3Dresource.getNumPE();
/*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);
}
/* try to change speed to 1000 */
for(int i=3D0;i<num;i++) { =20
// get a PE of this resource=20
// something like:
// pe=3D pelist.get(i);
// then change the rating
pe.setMIPSRating(1000); =09
}
/* to check that they are changed or not*/
=20
for(int i=3D0;i<num;i++)
{
rate_changed=3Dpelist.getMIPSRating(i);
//rate_changed is same as rate.
}
}
Tell me if this works,
Regards,
Agustin
yangyu escribi=C3=B3:
> 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=3D0;
> int rate_changed=3D0;
> PEList =
pelist=3Dresource.getMachineList().getMachine(0).getPEList();
> int num=3Dresource.getNumPE();
>
>
> /*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);
> }
>
>
> /* 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*/
> for(int i=3D0;i<num;i++)
> {
> // =
rate_changed=3Dpelist1.getMIPSRating(i)
> rate_changed=3Dpelist.getMIPSRating(i);
> //rate_changed is same as rate.
> }
> }
> --------------------------------------------------
>
>
>
> =
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> =20
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=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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