Basic HTML version of Foils prepared 19 September 98

Foil 76 Jacobi Iteration: create topology

From MPI Message Passing Interface Computational Science for Simulations -- Fall Semester 1998. by Geoffrey C. Fox, Nancy McCracken
call MPI_CART_CREATE(MPI_COMM_WORLD,
ndim,dims,periods,
reorder,comm2d,ierr)
CALL MPI_COMM_RANK( MPI_COMM_WORLD,
myrank, ierr )
CALL MPI_CART_COORDS( MPI_COMM_WORLD,
myrank, 2, coords, ierr )
CALL MPI_CART_SHIFT( comm2d,
2, 1, nbrleft, nbrright, ierr )
CALL MPI_CART_SHIFT( comm2d,
1, 1, nbrbottom, nbrtop, ierr )

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