On Nov 23, 2009, at 4:49 PM, Natarajan CS wrote:
> Oh okay that explains the behaviour of MPI_SHORT, guess sizeof is
> going to give me the same value no matter what MPI_Datatype I use?
> Thanks for the quick response!
Correct. MPI_<datatype_name> is just a handle to an internal MPI data
structure. Its size (as reported by sizeof()) is unrelated to the
actual datatype size.