MPI CART CREATE Finally, note that while the processes are arranged logically as a cartesian topology, the processors corresponding to these processes may in fact be scattered physically -even within a shared-memory machine If reorder is set to 1"in C, MPI may reorder the process ranks in the new communicator for potential gain in performance due to, say, the physical proximities of the processes assigned) If reorder is 0 in C, the process rank in the new communicator is identical to its rank in the old communicatorMPI_CART_CREATE • Finally, note that while the processes are arranged logically as a cartesian topology, the processors corresponding to these processes may in fact be scattered physically - even within a shared-memory machine. – If reorder is set to “1” in C, MPI may reorder the process ranks in the new communicator (for potential gain in performance due to, say, the physical proximities of the processes assigned). – If reorder is “0” in C, the process rank in the new communicator is identical to its rank in the old communicator