1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests repeated use of assembly for matrices.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6*9371c9d4SSatish Balay int main(int argc, char **args) { 7c4762a1bSJed Brown Mat C; 8c4762a1bSJed Brown PetscInt i, j, m = 5, n = 2, Ii, J; 9c4762a1bSJed Brown PetscMPIInt rank, size; 10c4762a1bSJed Brown PetscScalar v; 11c4762a1bSJed Brown 12327415f7SBarry Smith PetscFunctionBeginUser; 139566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 149566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 159566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 16c4762a1bSJed Brown n = 2 * size; 17c4762a1bSJed Brown 18c4762a1bSJed Brown /* create the matrix for the five point stencil, YET AGAIN*/ 199566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &C)); 209566063dSJacob Faibussowitsch PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n)); 219566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(C)); 229566063dSJacob Faibussowitsch PetscCall(MatSetUp(C)); 23c4762a1bSJed Brown for (i = 0; i < m; i++) { 24c4762a1bSJed Brown for (j = 2 * rank; j < 2 * rank + 2; j++) { 25*9371c9d4SSatish Balay v = -1.0; 26*9371c9d4SSatish Balay Ii = j + n * i; 27*9371c9d4SSatish Balay if (i > 0) { 28*9371c9d4SSatish Balay J = Ii - n; 29*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 30*9371c9d4SSatish Balay } 31*9371c9d4SSatish Balay if (i < m - 1) { 32*9371c9d4SSatish Balay J = Ii + n; 33*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 34*9371c9d4SSatish Balay } 35*9371c9d4SSatish Balay if (j > 0) { 36*9371c9d4SSatish Balay J = Ii - 1; 37*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 38*9371c9d4SSatish Balay } 39*9371c9d4SSatish Balay if (j < n - 1) { 40*9371c9d4SSatish Balay J = Ii + 1; 41*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 42*9371c9d4SSatish Balay } 43*9371c9d4SSatish Balay v = 4.0; 44*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES)); 45c4762a1bSJed Brown } 46c4762a1bSJed Brown } 479566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 489566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 49c4762a1bSJed Brown for (i = 0; i < m; i++) { 50c4762a1bSJed Brown for (j = 2 * rank; j < 2 * rank + 2; j++) { 51*9371c9d4SSatish Balay v = 1.0; 52*9371c9d4SSatish Balay Ii = j + n * i; 53*9371c9d4SSatish Balay if (i > 0) { 54*9371c9d4SSatish Balay J = Ii - n; 55*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 56*9371c9d4SSatish Balay } 57*9371c9d4SSatish Balay if (i < m - 1) { 58*9371c9d4SSatish Balay J = Ii + n; 59*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 60*9371c9d4SSatish Balay } 61*9371c9d4SSatish Balay if (j > 0) { 62*9371c9d4SSatish Balay J = Ii - 1; 63*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 64*9371c9d4SSatish Balay } 65*9371c9d4SSatish Balay if (j < n - 1) { 66*9371c9d4SSatish Balay J = Ii + 1; 67*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 68*9371c9d4SSatish Balay } 69*9371c9d4SSatish Balay v = -4.0; 70*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES)); 71c4762a1bSJed Brown } 72c4762a1bSJed Brown } 739566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 749566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 75c4762a1bSJed Brown 769566063dSJacob Faibussowitsch PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD)); 77c4762a1bSJed Brown 789566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 799566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 80b122ec5aSJacob Faibussowitsch return 0; 81c4762a1bSJed Brown } 82c4762a1bSJed Brown 83c4762a1bSJed Brown /*TEST 84c4762a1bSJed Brown 85c4762a1bSJed Brown test: 86c4762a1bSJed Brown 87c4762a1bSJed Brown TEST*/ 88