1 static char help[] = "Test MatCreateRedundantMatrix for rectangular matrix.\n\ 2 Contributed by Jose E. Roman, July 2017\n\n"; 3 4 #include <petscmat.h> 5 int main(int argc,char **args) 6 { 7 Mat A,B; 8 PetscErrorCode ierr; 9 PetscInt m=3,n=4,i,nsubcomm; 10 PetscMPIInt size,rank; 11 12 ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 13 ierr = MPI_Comm_size(PETSC_COMM_WORLD, &size);CHKERRMPI(ierr); 14 ierr = MPI_Comm_rank(PETSC_COMM_WORLD, &rank);CHKERRMPI(ierr); 15 16 nsubcomm = size; 17 ierr = PetscOptionsGetInt(NULL,NULL,"-nsubcomm",&nsubcomm,NULL);CHKERRQ(ierr); 18 19 ierr = MatCreate(PETSC_COMM_WORLD, &A);CHKERRQ(ierr); 20 ierr = MatSetSizes(A, m, n, PETSC_DETERMINE, PETSC_DETERMINE);CHKERRQ(ierr); 21 ierr = MatSetType(A, MATAIJ);CHKERRQ(ierr); 22 ierr = MatSetFromOptions(A);CHKERRQ(ierr); 23 ierr = MatSetUp(A);CHKERRQ(ierr); 24 25 if (rank == 0) { 26 for (i=0;i<size*PetscMin(m,n);i++) { 27 ierr = MatSetValue(A, i, i, 1.0, INSERT_VALUES);CHKERRQ(ierr); 28 } 29 } 30 ierr = MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 31 ierr = MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 32 ierr = MatView(A,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 33 34 ierr = MatCreateRedundantMatrix(A, nsubcomm, MPI_COMM_NULL, MAT_INITIAL_MATRIX, &B);CHKERRQ(ierr); 35 if (nsubcomm==size) { /* B is a sequential matrix */ 36 if (rank == 0) { 37 ierr = MatView(B,PETSC_VIEWER_STDOUT_SELF);CHKERRQ(ierr); 38 } 39 } else { 40 MPI_Comm comm; 41 ierr = PetscObjectGetComm((PetscObject)B,&comm);CHKERRQ(ierr); 42 ierr = MatView(B,PETSC_VIEWER_STDOUT_(comm));CHKERRQ(ierr); 43 } 44 45 ierr = MatDestroy(&A);CHKERRQ(ierr); 46 ierr = MatDestroy(&B);CHKERRQ(ierr); 47 ierr = PetscFinalize(); 48 return ierr; 49 } 50 51 /*TEST 52 53 test: 54 55 test: 56 suffix: 2 57 nsize: 3 58 59 test: 60 suffix: baij 61 args: -mat_type baij 62 63 test: 64 suffix: baij_2 65 nsize: 3 66 args: -mat_type baij 67 68 test: 69 suffix: dense 70 args: -mat_type dense 71 72 test: 73 suffix: dense_2 74 nsize: 3 75 args: -mat_type dense 76 77 TEST*/ 78