Charm++ parallel programming system

[Gengbin Zheng <zhenggb AT gmail.com>]

The load balancing strategy function is called on PE 0, so attaching
user data on each processor does not help since they won't be
transferred to the processor 0 which does the load balancing.

I assume you are writing a charm++ program using chare arrays?
The way charm++ maps chare array to load balancer ID is defined in
function idx2LDObjid() in file cklocation.C.
For 1,2 and 3 dimensional arrays, you can easily map objID in load
balancer back to its array index. The array manager group ID is the
same as LB OM (object manager).

Gengbin

On Sun, Apr 25, 2010 at 9:38 AM, Andrey Talnikov 
<a.v.talnikov AT gmail.com>
 wrote:
> Dear Sir or Madam,
>
> While using Charm++, I have faced an issue, which I want to clarify.
>
> I am implementing own load balancer and want to identify chares from
> work() function to get some specific information about each one. Is
> there any way to get a CkChareID from balancer database (LDStats, if
> I am not mistaken)? Maybe it is possible to attach a user-data to
> the database object's info?
>
> Yours faithfully,
> Andrey Talnikov
>
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