1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests sequential and parallel MatGetRow() and MatRestoreRow().\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 = 5, Ii, J, nz, rstart, rend; 9c4762a1bSJed Brown PetscMPIInt rank; 10c4762a1bSJed Brown const PetscInt *idx; 11c4762a1bSJed Brown PetscScalar v; 12c4762a1bSJed Brown const PetscScalar *values; 13c4762a1bSJed Brown 14327415f7SBarry Smith PetscFunctionBeginUser; 159566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 16c4762a1bSJed Brown /* Create the matrix for the five point stencil, YET AGAIN */ 179566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &C)); 189566063dSJacob Faibussowitsch PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n)); 199566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(C)); 209566063dSJacob Faibussowitsch PetscCall(MatSetUp(C)); 21c4762a1bSJed Brown for (i = 0; i < m; i++) { 22c4762a1bSJed Brown for (j = 0; j < n; j++) { 23*9371c9d4SSatish Balay v = -1.0; 24*9371c9d4SSatish Balay Ii = j + n * i; 25*9371c9d4SSatish Balay if (i > 0) { 26*9371c9d4SSatish Balay J = Ii - n; 27*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 28*9371c9d4SSatish Balay } 29*9371c9d4SSatish Balay if (i < m - 1) { 30*9371c9d4SSatish Balay J = Ii + n; 31*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 32*9371c9d4SSatish Balay } 33*9371c9d4SSatish Balay if (j > 0) { 34*9371c9d4SSatish Balay J = Ii - 1; 35*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 36*9371c9d4SSatish Balay } 37*9371c9d4SSatish Balay if (j < n - 1) { 38*9371c9d4SSatish Balay J = Ii + 1; 39*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 40*9371c9d4SSatish Balay } 41*9371c9d4SSatish Balay v = 4.0; 42*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES)); 43c4762a1bSJed Brown } 44c4762a1bSJed Brown } 459566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 469566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 479566063dSJacob Faibussowitsch PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD)); 48c4762a1bSJed Brown 499566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 509566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(C, &rstart, &rend)); 51c4762a1bSJed Brown for (i = rstart; i < rend; i++) { 529566063dSJacob Faibussowitsch PetscCall(MatGetRow(C, i, &nz, &idx, &values)); 53dd400576SPatrick Sanan if (rank == 0) { 54*9371c9d4SSatish Balay for (j = 0; j < nz; j++) { PetscCall(PetscPrintf(PETSC_COMM_SELF, "%" PetscInt_FMT " %g ", idx[j], (double)PetscRealPart(values[j]))); } 559566063dSJacob Faibussowitsch PetscCall(PetscPrintf(PETSC_COMM_SELF, "\n")); 56c4762a1bSJed Brown } 579566063dSJacob Faibussowitsch PetscCall(MatRestoreRow(C, i, &nz, &idx, &values)); 58c4762a1bSJed Brown } 59c4762a1bSJed Brown 609566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 619566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 62b122ec5aSJacob Faibussowitsch return 0; 63c4762a1bSJed Brown } 64c4762a1bSJed Brown 65c4762a1bSJed Brown /*TEST 66c4762a1bSJed Brown 67c4762a1bSJed Brown test: 68c4762a1bSJed Brown 69c4762a1bSJed Brown TEST*/ 70