1 #include <../src/mat/impls/sbaij/mpi/mpisbaij.h> /*I "petscmat.h" I*/ 2 #include <../src/mat/impls/aij/mpi/mpiaij.h> 3 #include <petsc/private/matimpl.h> 4 #include <petscmat.h> 5 6 PETSC_INTERN PetscErrorCode MatConvert_SeqAIJ_SeqBAIJ_Preallocate(Mat, PetscInt **); 7 PETSC_INTERN PetscErrorCode MatConvert_SeqAIJ_SeqSBAIJ_Preallocate(Mat, PetscInt **); 8 9 /* The code is virtually identical to MatConvert_MPIAIJ_MPIBAIJ() */ 10 PETSC_INTERN PetscErrorCode MatConvert_MPIAIJ_MPISBAIJ(Mat A, MatType newtype, MatReuse reuse, Mat *newmat) 11 { 12 Mat M; 13 Mat_MPIAIJ *mpimat = (Mat_MPIAIJ *)A->data; 14 PetscInt *d_nnz, *o_nnz; 15 PetscInt m, n, lm, ln, bs = PetscAbs(A->rmap->bs); 16 17 PetscFunctionBegin; 18 if (reuse != MAT_REUSE_MATRIX) { 19 PetscCall(MatDisAssemble_MPIAIJ(A)); 20 PetscCall(MatGetSize(A, &m, &n)); 21 PetscCall(MatGetLocalSize(A, &lm, &ln)); 22 PetscCall(MatConvert_SeqAIJ_SeqSBAIJ_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, MATMPISBAIJ)); 27 PetscCall(MatSeqSBAIJSetPreallocation(M, bs, 0, d_nnz)); 28 PetscCall(MatMPISBAIJSetPreallocation(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 } else M = *newmat; 34 35 /* reuse may not be equal to MAT_REUSE_MATRIX, but the basic converter will reallocate or replace newmat if this value is not used */ 36 /* if reuse is equal to MAT_INITIAL_MATRIX, it has been appropriately preallocated before */ 37 /* MAT_INPLACE_MATRIX, it will be replaced with MatHeaderReplace below */ 38 PetscCall(MatConvert_Basic(A, newtype, MAT_REUSE_MATRIX, &M)); 39 40 if (reuse == MAT_INPLACE_MATRIX) { 41 PetscCall(MatHeaderReplace(A, &M)); 42 } else *newmat = M; 43 PetscFunctionReturn(PETSC_SUCCESS); 44 } 45 46 /* contributed by Dahai Guo <dhguo@ncsa.uiuc.edu> April 2011 */ 47 PETSC_INTERN PetscErrorCode MatConvert_MPIBAIJ_MPISBAIJ(Mat A, MatType newtype, MatReuse reuse, Mat *newmat) 48 { 49 Mat M; 50 Mat_MPIBAIJ *mpimat = (Mat_MPIBAIJ *)A->data; 51 Mat_SeqBAIJ *Aa = (Mat_SeqBAIJ *)mpimat->A->data, *Ba = (Mat_SeqBAIJ *)mpimat->B->data; 52 PetscInt *d_nnz, *o_nnz; 53 PetscInt i, nz; 54 PetscInt m, n, lm, ln; 55 PetscInt rstart, rend; 56 const PetscScalar *vwork; 57 const PetscInt *cwork; 58 PetscInt bs = A->rmap->bs; 59 60 PetscFunctionBegin; 61 if (reuse != MAT_REUSE_MATRIX) { 62 PetscCall(MatGetSize(A, &m, &n)); 63 PetscCall(MatGetLocalSize(A, &lm, &ln)); 64 PetscCall(PetscMalloc2(lm / bs, &d_nnz, lm / bs, &o_nnz)); 65 66 PetscCall(MatMarkDiagonal_SeqBAIJ(mpimat->A)); 67 for (i = 0; i < lm / bs; i++) { 68 d_nnz[i] = Aa->i[i + 1] - Aa->diag[i]; 69 o_nnz[i] = Ba->i[i + 1] - Ba->i[i]; 70 } 71 72 PetscCall(MatCreate(PetscObjectComm((PetscObject)A), &M)); 73 PetscCall(MatSetSizes(M, lm, ln, m, n)); 74 PetscCall(MatSetType(M, MATMPISBAIJ)); 75 PetscCall(MatSeqSBAIJSetPreallocation(M, bs, 0, d_nnz)); 76 PetscCall(MatMPISBAIJSetPreallocation(M, bs, 0, d_nnz, 0, o_nnz)); 77 78 PetscCall(PetscFree2(d_nnz, o_nnz)); 79 } else M = *newmat; 80 81 PetscCall(MatGetOwnershipRange(A, &rstart, &rend)); 82 PetscCall(MatSetOption(M, MAT_IGNORE_LOWER_TRIANGULAR, PETSC_TRUE)); 83 for (i = rstart; i < rend; i++) { 84 PetscCall(MatGetRow(A, i, &nz, &cwork, &vwork)); 85 PetscCall(MatSetValues(M, 1, &i, nz, cwork, vwork, INSERT_VALUES)); 86 PetscCall(MatRestoreRow(A, i, &nz, &cwork, &vwork)); 87 } 88 PetscCall(MatAssemblyBegin(M, MAT_FINAL_ASSEMBLY)); 89 PetscCall(MatAssemblyEnd(M, MAT_FINAL_ASSEMBLY)); 90 91 if (reuse == MAT_INPLACE_MATRIX) { 92 PetscCall(MatHeaderReplace(A, &M)); 93 } else *newmat = M; 94 PetscFunctionReturn(PETSC_SUCCESS); 95 } 96