Charm++ parallel programming system

[Roberto de Quadros Gomes <rqg.gomes AT gmail.com>]

Hi,

I'm using a simple code written in AMPI for test and it have a loop like that:

"
i=100;
do
    {
        i--;
        res = MPI_Bcast(&sum, sizeof(int), MPI_INT, 0, MPI_COMM_WORLD);
        MPI_Barrier(MPI_COMM_WORLD);
        if( res != MPI_SUCCESS)
        MPI_Finalize();
       a--;
       if( a <= 0 )
       {
         MPI_Barrier(MPI_COMM_WORLD);
         MPI_Migrate();
         a = 5;
       }
   }while( i > 0);
"

When LB strategy is called, LDStats stats->n_comm always = 0. I believed this value would be 5 or larger than 5 because the MPI_Bcast function is there.
I had a problem like that when I tried read a pe_speed,  however I found out I needed use +LBTestPESpeed on command line. Is there any argument like this for LBStats to count each communication event?  Or am i doing confusing?