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_MPIAIJ_MPISBAIJ(Mat A, MatType newtype,MatReuse reuse,Mat *newmat) 8 { 9 PetscErrorCode ierr; 10 Mat M; 11 Mat_MPIAIJ *mpimat = (Mat_MPIAIJ*)A->data; 12 Mat_SeqAIJ *Aa = (Mat_SeqAIJ*)mpimat->A->data,*Ba = (Mat_SeqAIJ*)mpimat->B->data; 13 PetscInt *d_nnz,*o_nnz; 14 PetscInt i,j,nz; 15 PetscInt m,n,lm,ln; 16 PetscInt rstart,rend; 17 const PetscScalar *vwork; 18 const PetscInt *cwork; 19 20 PetscFunctionBegin; 21 if (!A->symmetric) SETERRQ(PetscObjectComm((PetscObject)A),PETSC_ERR_USER,"Matrix must be symmetric. Call MatSetOption(mat,MAT_SYMMETRIC,PETSC_TRUE)"); 22 ierr = MatGetSize(A,&m,&n);CHKERRQ(ierr); 23 ierr = MatGetLocalSize(A,&lm,&ln);CHKERRQ(ierr); 24 ierr = PetscMalloc2(lm,&d_nnz,lm,&o_nnz);CHKERRQ(ierr); 25 26 ierr = MatMarkDiagonal_SeqAIJ(mpimat->A);CHKERRQ(ierr); 27 for (i=0; i<lm; i++) { 28 d_nnz[i] = Aa->i[i+1] - Aa->diag[i]; 29 o_nnz[i] = Ba->i[i+1] - Ba->i[i]; 30 } 31 32 ierr = MatCreate(PetscObjectComm((PetscObject)A),&M);CHKERRQ(ierr); 33 ierr = MatSetSizes(M,lm,ln,m,n);CHKERRQ(ierr); 34 ierr = MatSetType(M,MATMPISBAIJ);CHKERRQ(ierr); 35 ierr = MatSeqSBAIJSetPreallocation(M,1,0,d_nnz);CHKERRQ(ierr); 36 ierr = MatMPISBAIJSetPreallocation(M,1,0,d_nnz,0,o_nnz);CHKERRQ(ierr); 37 38 ierr = PetscFree2(d_nnz,o_nnz);CHKERRQ(ierr); 39 40 ierr = MatGetOwnershipRange(A,&rstart,&rend);CHKERRQ(ierr); 41 for (i=rstart; i<rend; i++) { 42 ierr = MatGetRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 43 j = 0; 44 while (cwork[j] < i) { 45 j++; nz--; 46 } 47 ierr = MatSetValues(M,1,&i,nz,cwork+j,vwork+j,INSERT_VALUES);CHKERRQ(ierr); 48 ierr = MatRestoreRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 49 } 50 ierr = MatAssemblyBegin(M,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 51 ierr = MatAssemblyEnd(M,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 52 53 if (reuse == MAT_INPLACE_MATRIX) { 54 ierr = MatHeaderReplace(A,&M);CHKERRQ(ierr); 55 } else { 56 *newmat = M; 57 } 58 PetscFunctionReturn(0); 59 } 60 /* contributed by Dahai Guo <dhguo@ncsa.uiuc.edu> April 2011 */ 61 PETSC_INTERN PetscErrorCode MatConvert_MPIBAIJ_MPISBAIJ(Mat A, MatType newtype,MatReuse reuse,Mat *newmat) 62 { 63 PetscErrorCode ierr; 64 Mat M; 65 Mat_MPIBAIJ *mpimat = (Mat_MPIBAIJ*)A->data; 66 Mat_SeqBAIJ *Aa = (Mat_SeqBAIJ*)mpimat->A->data,*Ba = (Mat_SeqBAIJ*)mpimat->B->data; 67 PetscInt *d_nnz,*o_nnz; 68 PetscInt i,j,nz; 69 PetscInt m,n,lm,ln; 70 PetscInt rstart,rend; 71 const PetscScalar *vwork; 72 const PetscInt *cwork; 73 PetscInt bs = A->rmap->bs; 74 75 PetscFunctionBegin; 76 ierr = MatGetSize(A,&m,&n);CHKERRQ(ierr); 77 ierr = MatGetLocalSize(A,&lm,&ln);CHKERRQ(ierr); 78 ierr = PetscMalloc2(lm/bs,&d_nnz,lm/bs,&o_nnz);CHKERRQ(ierr); 79 80 ierr = MatMarkDiagonal_SeqBAIJ(mpimat->A);CHKERRQ(ierr); 81 for (i=0; i<lm/bs; i++) { 82 d_nnz[i] = Aa->i[i+1] - Aa->diag[i]; 83 o_nnz[i] = Ba->i[i+1] - Ba->i[i]; 84 } 85 86 ierr = MatCreate(PetscObjectComm((PetscObject)A),&M);CHKERRQ(ierr); 87 ierr = MatSetSizes(M,lm,ln,m,n);CHKERRQ(ierr); 88 ierr = MatSetType(M,MATMPISBAIJ);CHKERRQ(ierr); 89 ierr = MatSeqSBAIJSetPreallocation(M,bs,0,d_nnz);CHKERRQ(ierr); 90 ierr = MatMPISBAIJSetPreallocation(M,bs,0,d_nnz,0,o_nnz);CHKERRQ(ierr); 91 92 ierr = PetscFree2(d_nnz,o_nnz);CHKERRQ(ierr); 93 94 ierr = MatGetOwnershipRange(A,&rstart,&rend);CHKERRQ(ierr); 95 ierr = MatSetOption(M,MAT_IGNORE_LOWER_TRIANGULAR,PETSC_TRUE);CHKERRQ(ierr); 96 for (i=rstart; i<rend; i++) { 97 ierr = MatGetRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 98 j = 0; 99 ierr = MatSetValues(M,1,&i,nz,cwork+j,vwork+j,INSERT_VALUES);CHKERRQ(ierr); 100 ierr = MatRestoreRow(A,i,&nz,&cwork,&vwork);CHKERRQ(ierr); 101 } 102 ierr = MatAssemblyBegin(M,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 103 ierr = MatAssemblyEnd(M,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 104 105 if (reuse == MAT_INPLACE_MATRIX) { 106 ierr = MatHeaderReplace(A,&M);CHKERRQ(ierr); 107 } else { 108 *newmat = M; 109 } 110 PetscFunctionReturn(0); 111 } 112