1 2 #include <../src/mat/impls/baij/mpi/mpibaij.h> /*I "petscmat.h" I*/ 3 #include <../src/mat/impls/aij/mpi/mpiaij.h> 4 #include <petsc/private/matimpl.h> 5 #include <petscmat.h> 6 7 PETSC_INTERN PetscErrorCode MatConvert_SeqAIJ_SeqBAIJ_Preallocate(Mat, PetscInt **); 8 9 PETSC_INTERN PetscErrorCode MatConvert_MPIAIJ_MPIBAIJ(Mat A, MatType newtype, MatReuse reuse, Mat *newmat) 10 { 11 Mat M; 12 Mat_MPIAIJ *mpimat = (Mat_MPIAIJ *)A->data; 13 PetscInt *d_nnz, *o_nnz; 14 PetscInt m, n, lm, ln, bs = PetscAbs(A->rmap->bs); 15 16 PetscFunctionBegin; 17 if (reuse != MAT_REUSE_MATRIX) { 18 PetscBool3 sym = A->symmetric, hermitian = A->hermitian, structurally_symmetric = A->structurally_symmetric, spd = A->spd; 19 PetscCall(MatDisAssemble_MPIAIJ(A)); 20 PetscCall(MatGetSize(A, &m, &n)); 21 PetscCall(MatGetLocalSize(A, &lm, &ln)); 22 PetscCall(MatConvert_SeqAIJ_SeqBAIJ_Preallocate(mpimat->A, &d_nnz)); 23 PetscCall(MatConvert_SeqAIJ_SeqBAIJ_Preallocate(mpimat->B, &o_nnz)); 24 PetscCall(MatCreate(PetscObjectComm((PetscObject)A), &M)); 25 PetscCall(MatSetSizes(M, lm, ln, m, n)); 26 PetscCall(MatSetType(M, MATMPIBAIJ)); 27 PetscCall(MatSeqBAIJSetPreallocation(M, bs, 0, d_nnz)); 28 PetscCall(MatMPIBAIJSetPreallocation(M, bs, 0, d_nnz, 0, o_nnz)); 29 PetscCall(PetscFree(d_nnz)); 30 PetscCall(PetscFree(o_nnz)); 31 PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY)); 32 PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY)); 33 A->symmetric = sym; 34 A->hermitian = hermitian; 35 A->structurally_symmetric = structurally_symmetric; 36 A->spd = spd; 37 } else M = *newmat; 38 39 /* reuse may not be equal to MAT_REUSE_MATRIX, but the basic converter will reallocate or replace newmat if this value is not used */ 40 /* if reuse is equal to MAT_INITIAL_MATRIX, it has been appropriately preallocated before */ 41 /* MAT_INPLACE_MATRIX, it will be replaced with MatHeaderReplace below */ 42 PetscCall(MatConvert_Basic(A, newtype, MAT_REUSE_MATRIX, &M)); 43 44 if (reuse == MAT_INPLACE_MATRIX) { 45 PetscCall(MatHeaderReplace(A, &M)); 46 } else *newmat = M; 47 PetscFunctionReturn(0); 48 } 49