MatCreateAIJViennaCL#

Creates a sparse matrix in MATAIJ (compressed row) format (the default parallel PETSc format). This matrix will ultimately be pushed down to GPUs and use the ViennaCL library for calculations.

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatCreateAIJViennaCL(MPI_Comm comm, PetscInt m, PetscInt n, PetscInt M, PetscInt N, PetscInt d_nz, const PetscInt d_nnz[], PetscInt o_nz, const PetscInt o_nnz[], Mat *A)

Collective

Input Parameters#

  • comm - MPI communicator, set to PETSC_COMM_SELF

  • m - number of rows, or PETSC_DECIDE if M is provided

  • n - number of columns, or PETSC_DECIDE if N is provided

  • M - number of global rows in the matrix, or PETSC_DETERMINE if m is provided

  • N - number of global columns in the matrix, or PETSC_DETERMINE if n is provided

  • d_nz - number of nonzeros per row in DIAGONAL portion of local submatrix (same value is used for all local rows)

  • d_nnz - array containing the number of nonzeros in the various rows of the DIAGONAL portion of the local submatrix (possibly different for each row) or NULL, if d_nz is used to specify the nonzero structure. The size of this array is equal to the number of local rows, i.e m. For matrices you plan to factor you must leave room for the diagonal entry and put in the entry even if it is zero.

  • o_nz - number of nonzeros per row in the OFF-DIAGONAL portion of local submatrix (same value is used for all local rows).

  • o_nnz - array containing the number of nonzeros in the various rows of the OFF-DIAGONAL portion of the local submatrix (possibly different for each row) or NULL, if o_nz is used to specify the nonzero structure. The size of this array is equal to the number of local rows, i.e m.

Output Parameter#

  • A - the matrix

Notes#

It is recommended that one use the MatCreate(), MatSetType() and/or MatSetFromOptions(), MatXXXXSetPreallocation() paradigm instead of this routine directly. [MatXXXXSetPreallocation() is, for example, MatSeqAIJSetPreallocation()]

The AIJ format, also called compressed row storage), is fully compatible with standard Fortran storage. That is, the stored row and column indices can begin at either one (as in Fortran) or zero.

See Also#

Mat, MatCreate(), MatCreateAIJ(), MatCreateAIJCUSPARSE(), MatSetValues(), MatSeqAIJSetColumnIndices(), MatCreateSeqAIJWithArrays(), MatCreateAIJ(), MATMPIAIJVIENNACL, MATAIJVIENNACL

Level#

intermediate

Location#

src/mat/impls/aij/mpi/mpiviennacl/mpiaijviennacl.cxx

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