Charm++ parallel programming system

[Eric Bohm <ebohm AT uiuc.edu>]

Kristian Rune Larsen wrote:

> Hi 
>
> I have just started using charm++ and I think it is a nice environment, but I 
> am having troubles learning the language.  My question is, if there exists a 
> mailing list for charm++ questions  ?
> Right now I am trying to figure out  how array-sections work. Does 
> array-sections have to be sequential in index e.g. 4,5,6 or can they be 
> random 2,3,5 ?  And what does CkArrayIndexMax do ? is it an integer index , a 
> proxy, or a chareID ? And is it possible to PUP a named enum ?  
>
> best wishes 
> Kristian Rune Larsen 
> student , Technical University of Denmark 
>
>  
The charm AT cs.uiuc.edu mailing list is the appropriate venue for this 
sort of question.

We are reactivating it and encourage interested charm users to subscribe.

Array sections are an arbitrary set of array indices, they do not have 
to be sequential.

CkArrayIndexMax is the mechanism you should use to select the indices 
you want in your array section.

It should be an array of incides.  For example:

CkArrayIndexMax *al = new CkArrayIndexMax[sectionSize];
   for (int i=0; i<sectionSize; i++) {
     al[i] = CkArrayIndex1D(i);
   }

In this case its a contiguous list, but the RHS could be any valid array 
index.