1c4762a1bSJed Brown static char help[] = "Tests MatCreateSubMatrices() for SBAIJ matrices\n\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown #include <petscmat.h> 4c4762a1bSJed Brown 5d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 6d71ae5a4SJacob Faibussowitsch { 7c4762a1bSJed Brown Mat BAIJ, SBAIJ, *subBAIJ, *subSBAIJ; 8c4762a1bSJed Brown PetscViewer viewer; 9c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; 10c4762a1bSJed Brown PetscBool flg; 11c4762a1bSJed Brown PetscInt n = 2, issize, M, N; 12c4762a1bSJed Brown PetscMPIInt rank; 13c4762a1bSJed Brown IS isrow, iscol, irow[n], icol[n]; 14c4762a1bSJed Brown 15327415f7SBarry Smith PetscFunctionBeginUser; 16*c8025a54SPierre Jolivet PetscCall(PetscInitialize(&argc, &args, NULL, help)); 179566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL, NULL, "-f", file, sizeof(file), &flg)); 189566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &viewer)); 19c4762a1bSJed Brown 209566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &BAIJ)); 219566063dSJacob Faibussowitsch PetscCall(MatSetType(BAIJ, MATMPIBAIJ)); 229566063dSJacob Faibussowitsch PetscCall(MatLoad(BAIJ, viewer)); 239566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 24c4762a1bSJed Brown 259566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &viewer)); 269566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &SBAIJ)); 279566063dSJacob Faibussowitsch PetscCall(MatSetType(SBAIJ, MATMPISBAIJ)); 289566063dSJacob Faibussowitsch PetscCall(MatLoad(SBAIJ, viewer)); 299566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 30c4762a1bSJed Brown 319566063dSJacob Faibussowitsch PetscCall(MatGetSize(BAIJ, &M, &N)); 32c4762a1bSJed Brown issize = M / 4; 339566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_SELF, issize, 0, 1, &isrow)); 34c4762a1bSJed Brown irow[0] = irow[1] = isrow; 35c4762a1bSJed Brown issize = N / 2; 369566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_SELF, issize, 0, 1, &iscol)); 37c4762a1bSJed Brown icol[0] = icol[1] = iscol; 389566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(BAIJ, n, irow, icol, MAT_INITIAL_MATRIX, &subBAIJ)); 399566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(BAIJ, n, irow, icol, MAT_REUSE_MATRIX, &subBAIJ)); 40c4762a1bSJed Brown 41c4762a1bSJed Brown /* irow and icol must be same for SBAIJ matrices! */ 42c4762a1bSJed Brown icol[0] = icol[1] = isrow; 439566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(SBAIJ, n, irow, icol, MAT_INITIAL_MATRIX, &subSBAIJ)); 449566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(SBAIJ, n, irow, icol, MAT_REUSE_MATRIX, &subSBAIJ)); 45c4762a1bSJed Brown 469566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 47dd400576SPatrick Sanan if (rank == 0) { 489566063dSJacob Faibussowitsch PetscCall(MatView(subBAIJ[0], PETSC_VIEWER_STDOUT_SELF)); 499566063dSJacob Faibussowitsch PetscCall(MatView(subSBAIJ[0], PETSC_VIEWER_STDOUT_SELF)); 50c4762a1bSJed Brown } 51c4762a1bSJed Brown 52c4762a1bSJed Brown /* Free data structures */ 539566063dSJacob Faibussowitsch PetscCall(ISDestroy(&isrow)); 549566063dSJacob Faibussowitsch PetscCall(ISDestroy(&iscol)); 559566063dSJacob Faibussowitsch PetscCall(MatDestroySubMatrices(n, &subBAIJ)); 569566063dSJacob Faibussowitsch PetscCall(MatDestroySubMatrices(n, &subSBAIJ)); 579566063dSJacob Faibussowitsch PetscCall(MatDestroy(&BAIJ)); 589566063dSJacob Faibussowitsch PetscCall(MatDestroy(&SBAIJ)); 59c4762a1bSJed Brown 609566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 61b122ec5aSJacob Faibussowitsch return 0; 62c4762a1bSJed Brown } 63