1 2 #include <../src/mat/impls/sbaij/mpi/mpisbaij.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 PETSC_INTERN PetscErrorCode MatConvert_SeqAIJ_SeqSBAIJ_Preallocate(Mat, PetscInt **); 9 10 /* The code is virtually identical to MatConvert_MPIAIJ_MPIBAIJ() */ 11 PETSC_INTERN PetscErrorCode MatConvert_MPIAIJ_MPISBAIJ(Mat A, MatType newtype, MatReuse reuse, Mat *newmat) 12 { 13 Mat M; 14 Mat_MPIAIJ *mpimat = (Mat_MPIAIJ *)A->data; 15 PetscInt *d_nnz, *o_nnz; 16 PetscInt m, n, lm, ln, bs = PetscAbs(A->rmap->bs); 17 18 PetscFunctionBegin; 19 if (reuse != MAT_REUSE_MATRIX) { 20 PetscCall(MatDisAssemble_MPIAIJ(A)); 21 PetscCall(MatGetSize(A, &m, &n)); 22 PetscCall(MatGetLocalSize(A, &lm, &ln)); 23 PetscCall(MatConvert_SeqAIJ_SeqSBAIJ_Preallocate(mpimat->A, &d_nnz)); 24 PetscCall(MatConvert_SeqAIJ_SeqBAIJ_Preallocate(mpimat->B, &o_nnz)); 25 PetscCall(MatCreate(PetscObjectComm((PetscObject)A), &M)); 26 PetscCall(MatSetSizes(M, lm, ln, m, n)); 27 PetscCall(MatSetType(M, MATMPISBAIJ)); 28 PetscCall(MatSeqSBAIJSetPreallocation(M, bs, 0, d_nnz)); 29 PetscCall(MatMPISBAIJSetPreallocation(M, bs, 0, d_nnz, 0, o_nnz)); 30 PetscCall(PetscFree(d_nnz)); 31 PetscCall(PetscFree(o_nnz)); 32 PetscCall(MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY)); 33 PetscCall(MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY)); 34 } else M = *newmat; 35 36 /* reuse may not be equal to MAT_REUSE_MATRIX, but the basic converter will reallocate or replace newmat if this value is not used */ 37 /* if reuse is equal to MAT_INITIAL_MATRIX, it has been appropriately preallocated before */ 38 /* MAT_INPLACE_MATRIX, it will be replaced with MatHeaderReplace below */ 39 PetscCall(MatConvert_Basic(A, newtype, MAT_REUSE_MATRIX, &M)); 40 41 if (reuse == MAT_INPLACE_MATRIX) { 42 PetscCall(MatHeaderReplace(A, &M)); 43 } else *newmat = M; 44 PetscFunctionReturn(0); 45 } 46 47 /* contributed by Dahai Guo <dhguo@ncsa.uiuc.edu> April 2011 */ 48 PETSC_INTERN PetscErrorCode MatConvert_MPIBAIJ_MPISBAIJ(Mat A, MatType newtype, MatReuse reuse, Mat *newmat) 49 { 50 Mat M; 51 Mat_MPIBAIJ *mpimat = (Mat_MPIBAIJ *)A->data; 52 Mat_SeqBAIJ *Aa = (Mat_SeqBAIJ *)mpimat->A->data, *Ba = (Mat_SeqBAIJ *)mpimat->B->data; 53 PetscInt *d_nnz, *o_nnz; 54 PetscInt i, nz; 55 PetscInt m, n, lm, ln; 56 PetscInt rstart, rend; 57 const PetscScalar *vwork; 58 const PetscInt *cwork; 59 PetscInt bs = A->rmap->bs; 60 61 PetscFunctionBegin; 62 if (reuse != MAT_REUSE_MATRIX) { 63 PetscCall(MatGetSize(A, &m, &n)); 64 PetscCall(MatGetLocalSize(A, &lm, &ln)); 65 PetscCall(PetscMalloc2(lm / bs, &d_nnz, lm / bs, &o_nnz)); 66 67 PetscCall(MatMarkDiagonal_SeqBAIJ(mpimat->A)); 68 for (i = 0; i < lm / bs; i++) { 69 d_nnz[i] = Aa->i[i + 1] - Aa->diag[i]; 70 o_nnz[i] = Ba->i[i + 1] - Ba->i[i]; 71 } 72 73 PetscCall(MatCreate(PetscObjectComm((PetscObject)A), &M)); 74 PetscCall(MatSetSizes(M, lm, ln, m, n)); 75 PetscCall(MatSetType(M, MATMPISBAIJ)); 76 PetscCall(MatSeqSBAIJSetPreallocation(M, bs, 0, d_nnz)); 77 PetscCall(MatMPISBAIJSetPreallocation(M, bs, 0, d_nnz, 0, o_nnz)); 78 79 PetscCall(PetscFree2(d_nnz, o_nnz)); 80 } else M = *newmat; 81 82 PetscCall(MatGetOwnershipRange(A, &rstart, &rend)); 83 PetscCall(MatSetOption(M, MAT_IGNORE_LOWER_TRIANGULAR, PETSC_TRUE)); 84 for (i = rstart; i < rend; i++) { 85 PetscCall(MatGetRow(A, i, &nz, &cwork, &vwork)); 86 PetscCall(MatSetValues(M, 1, &i, nz, cwork, vwork, INSERT_VALUES)); 87 PetscCall(MatRestoreRow(A, i, &nz, &cwork, &vwork)); 88 } 89 PetscCall(MatAssemblyBegin(M, MAT_FINAL_ASSEMBLY)); 90 PetscCall(MatAssemblyEnd(M, MAT_FINAL_ASSEMBLY)); 91 92 if (reuse == MAT_INPLACE_MATRIX) { 93 PetscCall(MatHeaderReplace(A, &M)); 94 } else *newmat = M; 95 PetscFunctionReturn(0); 96 } 97