Charm++ parallel programming system

[Evghenii Gaburov <e-gaburov AT northwestern.edu>]

Hi All,

In my Charm program I have an array declared as readonly:

*.ci:    readonly CkVec<boundary> domains_boundary;
Main.h:  extern   CkVec<boundary> domains_boundary;
Main.cpp:         CkVec<boundary> domains_boundary;

which holds boundaries of each of the chare domain (this is a part of the 
domain decomposition code).

These arrays are initially set in the Mainchare constructor, however, they 
change dynamically during runtime as well (by a method in Mainchare, which is 
called outside the constructor from a threaded method). As I understand, the 
changes done outside the Mainchare constructor won't be communicated to other 
processors automatically.

I was wondering how can I manually communicate the updated array to the rest 
of the processors?

I cannot communicate these to each of the chare (which currently do), since 
once the number of chares becomes large (>1024), too much memory is consumed 
unnecessary (quadratic scaling with #chares)); so I want to keep these arrays 
as global arrays.

Any suggestions/advice?

Thanks!

Cheers,
Evghenii


--
Evghenii Gaburov, 
e-gaburov AT northwestern.edu