MPI CART CREATE Note: MPI CART CREATE is a collective communication function(see Chapter 6-Collective Communications). It must be called by all processes in the group Like other collective communication routines, MPI CART CREATE uses blocking communication However, it is not required to be synchronized among processes in the group and hence is implementation dependent If the total size of the cartesian grid is smaller than available processes, those processes not included in the new communicator will return MP COMM NULl If the total size of the Cartesian grid is larger than available processes, the call results in error.MPI_CART_CREATE • Note: – MPI_CART_CREATE is a collective communication function (see Chapter 6 - Collective Communications). It must be called by all processes in the group. Like other collective communication routines, MPI_CART_CREATE uses blocking communication. However, it is not required to be synchronized among processes in the group and hence is implementation dependent. – If the total size of the Cartesian grid is smaller than available processes, those processes not included in the new communicator will return MPI_COMM_NULL. – If the total size of the Cartesian grid is larger than available processes, the call results in error