#include "petscmat.h" PetscErrorCode MatCreateIS(MPI_Comm comm,PetscInt bs,PetscInt m,PetscInt n,PetscInt M,PetscInt N,ISLocalToGlobalMapping map,Mat *A)
comm | - MPI communicator that will share the matrix | |
bs | - local and global block size of the matrix | |
m,n,M,N | - local and/or global sizes of the left and right vector used in matrix vector products | |
map | - mapping that defines the global number for each local number |
Notes: See MATIS for more details m and n are NOT related to the size of the map, they are the size of the part of the vector owned by that process. m + nghosts (or n + nghosts) is the length of map since map maps all local points plus the ghost points to global indices.
Level:advanced
Location:src/mat/impls/is/matis.c
Index of all Mat routines
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Index of all manual pages