1 2 static char help[] = "Tests MatMPIAIJSetPreallocationCSR()\n\n"; 3 4 /*T 5 Concepts: partitioning 6 Processors: 4 7 T*/ 8 9 /* 10 Include "petscmat.h" so that we can use matrices. Note that this file 11 automatically includes: 12 petscsys.h - base PETSc routines petscvec.h - vectors 13 petscmat.h - matrices 14 petscis.h - index sets 15 petscviewer.h - viewers 16 */ 17 #include <petscmat.h> 18 19 int main(int argc,char **args) 20 { 21 Mat A; 22 PetscInt *ia,*ja; 23 PetscErrorCode ierr; 24 PetscMPIInt rank,size; 25 26 ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 27 ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRMPI(ierr); 28 if (size != 4) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_WRONG_MPI_SIZE,"Must run with 4 processors"); 29 ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRMPI(ierr); 30 31 ierr = PetscMalloc1(5,&ia);CHKERRQ(ierr); 32 ierr = PetscMalloc1(16,&ja);CHKERRQ(ierr); 33 if (!rank) { 34 ja[0] = 1; ja[1] = 4; ja[2] = 0; ja[3] = 2; ja[4] = 5; ja[5] = 1; ja[6] = 3; ja[7] = 6; 35 ja[8] = 2; ja[9] = 7; 36 ia[0] = 0; ia[1] = 2; ia[2] = 5; ia[3] = 8; ia[4] = 10; 37 } else if (rank == 1) { 38 ja[0] = 0; ja[1] = 5; ja[2] = 8; ja[3] = 1; ja[4] = 4; ja[5] = 6; ja[6] = 9; ja[7] = 2; 39 ja[8] = 5; ja[9] = 7; ja[10] = 10; ja[11] = 3; ja[12] = 6; ja[13] = 11; 40 ia[0] = 0; ia[1] = 3; ia[2] = 7; ia[3] = 11; ia[4] = 14; 41 } else if (rank == 2) { 42 ja[0] = 4; ja[1] = 9; ja[2] = 12; ja[3] = 5; ja[4] = 8; ja[5] = 10; ja[6] = 13; ja[7] = 6; 43 ja[8] = 9; ja[9] = 11; ja[10] = 14; ja[11] = 7; ja[12] = 10; ja[13] = 15; 44 ia[0] = 0; ia[1] = 3; ia[2] = 7; ia[3] = 11; ia[4] = 14; 45 } else { 46 ja[0] = 8; ja[1] = 13; ja[2] = 9; ja[3] = 12; ja[4] = 14; ja[5] = 10; ja[6] = 13; ja[7] = 15; 47 ja[8] = 11; ja[9] = 14; 48 ia[0] = 0; ia[1] = 2; ia[2] = 5; ia[3] = 8; ia[4] = 10; 49 } 50 51 ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr); 52 ierr = MatSetSizes(A,4,4,16,16);CHKERRQ(ierr); 53 ierr = MatSetType(A,MATMPIAIJ);CHKERRQ(ierr); 54 ierr = MatMPIAIJSetPreallocationCSR(A,ia,ja,NULL);CHKERRQ(ierr); 55 ierr = PetscFree(ia);CHKERRQ(ierr); 56 ierr = PetscFree(ja);CHKERRQ(ierr); 57 ierr = MatView(A,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 58 ierr = MatDestroy(&A);CHKERRQ(ierr); 59 ierr = PetscFinalize(); 60 return ierr; 61 } 62 63 /*TEST 64 65 test: 66 nsize: 4 67 68 TEST*/ 69