Basic HTML version of Foils prepared 6 December 96

Foil 27 Matrix Multiplication Pseudocode, continued

From Full Matrices - December 4, 1995 CPS615 Basic Simulation Track for Computational Science -- Fall Semester 95. by Geoffrey C. Fox, Nancy J. McCracken
Assume that each processor has array coords, which tell its position in the processor grid and a "rows" communicator group is created:
  • MPI_Cart_coords(comm2d, myrank, 2, coords)
  • MPI_Cart_sub(comm2d, [F,T], comm2drows)

© on Tue Oct 7 1997