1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatCreateSubMatrices() for SBAIJ matrices\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6*d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 7*d71ae5a4SJacob Faibussowitsch { 8c4762a1bSJed Brown Mat BAIJ, SBAIJ, *subBAIJ, *subSBAIJ; 9c4762a1bSJed Brown PetscViewer viewer; 10c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; 11c4762a1bSJed Brown PetscBool flg; 12c4762a1bSJed Brown PetscInt n = 2, issize, M, N; 13c4762a1bSJed Brown PetscMPIInt rank; 14c4762a1bSJed Brown IS isrow, iscol, irow[n], icol[n]; 15c4762a1bSJed Brown 16327415f7SBarry Smith PetscFunctionBeginUser; 179566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 189566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL, NULL, "-f", file, sizeof(file), &flg)); 199566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &viewer)); 20c4762a1bSJed Brown 219566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &BAIJ)); 229566063dSJacob Faibussowitsch PetscCall(MatSetType(BAIJ, MATMPIBAIJ)); 239566063dSJacob Faibussowitsch PetscCall(MatLoad(BAIJ, viewer)); 249566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 25c4762a1bSJed Brown 269566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &viewer)); 279566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &SBAIJ)); 289566063dSJacob Faibussowitsch PetscCall(MatSetType(SBAIJ, MATMPISBAIJ)); 299566063dSJacob Faibussowitsch PetscCall(MatLoad(SBAIJ, viewer)); 309566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 31c4762a1bSJed Brown 329566063dSJacob Faibussowitsch PetscCall(MatGetSize(BAIJ, &M, &N)); 33c4762a1bSJed Brown issize = M / 4; 349566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_SELF, issize, 0, 1, &isrow)); 35c4762a1bSJed Brown irow[0] = irow[1] = isrow; 36c4762a1bSJed Brown issize = N / 2; 379566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_SELF, issize, 0, 1, &iscol)); 38c4762a1bSJed Brown icol[0] = icol[1] = iscol; 399566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(BAIJ, n, irow, icol, MAT_INITIAL_MATRIX, &subBAIJ)); 409566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(BAIJ, n, irow, icol, MAT_REUSE_MATRIX, &subBAIJ)); 41c4762a1bSJed Brown 42c4762a1bSJed Brown /* irow and icol must be same for SBAIJ matrices! */ 43c4762a1bSJed Brown icol[0] = icol[1] = isrow; 449566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(SBAIJ, n, irow, icol, MAT_INITIAL_MATRIX, &subSBAIJ)); 459566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(SBAIJ, n, irow, icol, MAT_REUSE_MATRIX, &subSBAIJ)); 46c4762a1bSJed Brown 479566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 48dd400576SPatrick Sanan if (rank == 0) { 499566063dSJacob Faibussowitsch PetscCall(MatView(subBAIJ[0], PETSC_VIEWER_STDOUT_SELF)); 509566063dSJacob Faibussowitsch PetscCall(MatView(subSBAIJ[0], PETSC_VIEWER_STDOUT_SELF)); 51c4762a1bSJed Brown } 52c4762a1bSJed Brown 53c4762a1bSJed Brown /* Free data structures */ 549566063dSJacob Faibussowitsch PetscCall(ISDestroy(&isrow)); 559566063dSJacob Faibussowitsch PetscCall(ISDestroy(&iscol)); 569566063dSJacob Faibussowitsch PetscCall(MatDestroySubMatrices(n, &subBAIJ)); 579566063dSJacob Faibussowitsch PetscCall(MatDestroySubMatrices(n, &subSBAIJ)); 589566063dSJacob Faibussowitsch PetscCall(MatDestroy(&BAIJ)); 599566063dSJacob Faibussowitsch PetscCall(MatDestroy(&SBAIJ)); 60c4762a1bSJed Brown 619566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 62b122ec5aSJacob Faibussowitsch return 0; 63c4762a1bSJed Brown } 64