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_MPIAIJ_MPIBAIJ(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,m,n,lm,ln,bs=PetscAbs(A->rmap->bs); 15 16 PetscFunctionBegin; 17 if (reuse != MAT_REUSE_MATRIX) { 18 ierr = MatGetSize(A,&m,&n);CHKERRQ(ierr); 19 ierr = MatGetLocalSize(A,&lm,&ln);CHKERRQ(ierr); 20 ierr = PetscMalloc2(lm/bs,&d_nnz,lm/bs,&o_nnz);CHKERRQ(ierr); 21 22 for (i=0; i<lm/bs; i++) { 23 d_nnz[i] = (Aa->i[i*bs+1] - Aa->i[i*bs])/bs; 24 o_nnz[i] = (Ba->i[i*bs+1] - Ba->i[i*bs])/bs; 25 } 26 27 ierr = MatCreate(PetscObjectComm((PetscObject)A),&M);CHKERRQ(ierr); 28 ierr = MatSetSizes(M,lm,ln,m,n);CHKERRQ(ierr); 29 ierr = MatSetType(M,MATMPIBAIJ);CHKERRQ(ierr); 30 ierr = MatSeqBAIJSetPreallocation(M,bs,0,d_nnz);CHKERRQ(ierr); 31 ierr = MatMPIBAIJSetPreallocation(M,bs,0,d_nnz,0,o_nnz);CHKERRQ(ierr); 32 ierr = PetscFree2(d_nnz,o_nnz);CHKERRQ(ierr); 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 ierr = MatConvert_Basic(A,newtype,MAT_REUSE_MATRIX,&M);CHKERRQ(ierr); 39 40 if (reuse == MAT_INPLACE_MATRIX) { 41 ierr = MatHeaderReplace(A,&M);CHKERRQ(ierr); 42 } else *newmat = M; 43 PetscFunctionReturn(0); 44 } 45