int HYPRE_ParCSRCotreeSetup(HYPRE_Solver solver, HYPRE_ParCSRMatrix A,
HYPRE_ParVector b, HYPRE_ParVector x)
{
int *partition, *new_partition, nprocs, *tindices, ii;
void *vsolver = (void *) solver;
/*
void *vA = (void *) A;
void *vb = (void *) b;
void *vx = (void *) x;
*/
hypre_CotreeData *cotree_data = (hypre_CotreeData *) vsolver;
hypre_ParCSRMatrix **submatrices;
hypre_ParVector *new_vector;
MPI_Comm comm;
cotree_data->Aee = (hypre_ParCSRMatrix *) A;
hypre_ParCSRMatrixGenSpanningTree(cotree_data->Gen, &tindices, 1);
submatrices = (hypre_ParCSRMatrix **) malloc(sizeof(hypre_ParCSRMatrix *));
hypre_ParCSRMatrixExtractSubmatrices(cotree_data->Aee, tindices,
&submatrices);
cotree_data->Att = submatrices[0];
cotree_data->Atc = submatrices[1];
cotree_data->Act = submatrices[2];
cotree_data->Acc = submatrices[3];
hypre_ParCSRMatrixExtractRowSubmatrices(cotree_data->Gen, tindices,
&submatrices);
cotree_data->Gt = submatrices[0];
cotree_data->Gc = submatrices[1];
free(submatrices);
comm = hypre_ParCSRMatrixComm((hypre_ParCSRMatrix *) A);
MPI_Comm_size(comm, &nprocs);
partition = hypre_ParVectorPartitioning((hypre_ParVector *) b);
new_partition = (int *) malloc((nprocs+1) * sizeof(int));
for (ii = 0; ii <= nprocs; ii++) new_partition[ii] = partition[ii];
/* partition = hypre_ParVectorPartitioning((hypre_ParVector *) b); */
new_vector = hypre_ParVectorCreate(hypre_ParVectorComm((hypre_ParVector *)b),
(int) hypre_ParVectorGlobalSize((hypre_ParVector *) b),
new_partition);
hypre_ParVectorInitialize(new_vector);
cotree_data->w = new_vector;
return 0;
}
HYPRE_Int hypre_BlockTridiagSetup(void *data, hypre_ParCSRMatrix *A,
hypre_ParVector *b, hypre_ParVector *x)
{
HYPRE_Int i, j, *index_set1, print_level, nsweeps, relax_type;
HYPRE_Int nrows, nrows1, nrows2, start1, start2, *index_set2;
HYPRE_Int count, ierr;
double threshold;
hypre_ParCSRMatrix **submatrices;
HYPRE_Solver precon1;
HYPRE_Solver precon2;
HYPRE_IJVector ij_u1, ij_u2, ij_f1, ij_f2;
hypre_ParVector *vector;
MPI_Comm comm;
hypre_BlockTridiagData *b_data = (hypre_BlockTridiagData *) data;
HYPRE_ParCSRMatrixGetComm((HYPRE_ParCSRMatrix) A, &comm);
index_set1 = b_data->index_set1;
nrows1 = index_set1[0];
nrows = hypre_ParCSRMatrixNumRows(A);
nrows2 = nrows - nrows1;
b_data->index_set2 = hypre_CTAlloc(HYPRE_Int, nrows2+1);
index_set2 = b_data->index_set2;
index_set2[0] = nrows2;
count = 1;
for (i = 0; i < index_set1[1]; i++) index_set2[count++] = i;
for (i = 1; i < nrows1; i++)
for (j = index_set1[i]+1; j < index_set1[i+1]; j++)
index_set2[count++] = j;
for (i = index_set1[nrows1]+1; i < nrows; i++) index_set2[count++] = i;
submatrices = hypre_CTAlloc(hypre_ParCSRMatrix *, 4);
hypre_ParCSRMatrixExtractSubmatrices(A, index_set1, &submatrices);
nrows1 = hypre_ParCSRMatrixNumRows(submatrices[0]);
nrows2 = hypre_ParCSRMatrixNumRows(submatrices[3]);
start1 = hypre_ParCSRMatrixFirstRowIndex(submatrices[0]);
start2 = hypre_ParCSRMatrixFirstRowIndex(submatrices[3]);
HYPRE_IJVectorCreate(comm, start1, start1+nrows1-1, &ij_u1);
HYPRE_IJVectorSetObjectType(ij_u1, HYPRE_PARCSR);
ierr = HYPRE_IJVectorInitialize(ij_u1);
ierr += HYPRE_IJVectorAssemble(ij_u1);
hypre_assert(!ierr);
HYPRE_IJVectorCreate(comm, start1, start1+nrows1-1, &ij_f1);
HYPRE_IJVectorSetObjectType(ij_f1, HYPRE_PARCSR);
ierr = HYPRE_IJVectorInitialize(ij_f1);
ierr += HYPRE_IJVectorAssemble(ij_f1);
hypre_assert(!ierr);
HYPRE_IJVectorCreate(comm, start2, start2+nrows2-1, &ij_u2);
HYPRE_IJVectorSetObjectType(ij_u2, HYPRE_PARCSR);
ierr = HYPRE_IJVectorInitialize(ij_u2);
ierr += HYPRE_IJVectorAssemble(ij_u2);
hypre_assert(!ierr);
HYPRE_IJVectorCreate(comm, start2, start2+nrows1-1, &ij_f2);
HYPRE_IJVectorSetObjectType(ij_f2, HYPRE_PARCSR);
ierr = HYPRE_IJVectorInitialize(ij_f2);
ierr += HYPRE_IJVectorAssemble(ij_f2);
hypre_assert(!ierr);
HYPRE_IJVectorGetObject(ij_f1, (void **) &vector);
b_data->F1 = vector;
HYPRE_IJVectorGetObject(ij_u1, (void **) &vector);
b_data->U1 = vector;
HYPRE_IJVectorGetObject(ij_f2, (void **) &vector);
b_data->F2 = vector;
HYPRE_IJVectorGetObject(ij_u2, (void **) &vector);
b_data->U2 = vector;
print_level = b_data->print_level;
threshold = b_data->threshold;
nsweeps = b_data->num_sweeps;
relax_type = b_data->relax_type;
threshold = b_data->threshold;
HYPRE_BoomerAMGCreate(&precon1);
HYPRE_BoomerAMGSetMaxIter(precon1, 1);
HYPRE_BoomerAMGSetCycleType(precon1, 1);
HYPRE_BoomerAMGSetPrintLevel(precon1, print_level);
HYPRE_BoomerAMGSetMaxLevels(precon1, 25);
HYPRE_BoomerAMGSetMeasureType(precon1, 0);
HYPRE_BoomerAMGSetCoarsenType(precon1, 0);
HYPRE_BoomerAMGSetStrongThreshold(precon1, threshold);
HYPRE_BoomerAMGSetNumFunctions(precon1, 1);
HYPRE_BoomerAMGSetNumSweeps(precon1, nsweeps);
HYPRE_BoomerAMGSetRelaxType(precon1, relax_type);
hypre_BoomerAMGSetup(precon1, submatrices[0], b_data->U1, b_data->F1);
HYPRE_BoomerAMGCreate(&precon2);
HYPRE_BoomerAMGSetMaxIter(precon2, 1);
HYPRE_BoomerAMGSetCycleType(precon2, 1);
HYPRE_BoomerAMGSetPrintLevel(precon2, print_level);
HYPRE_BoomerAMGSetMaxLevels(precon2, 25);
HYPRE_BoomerAMGSetMeasureType(precon2, 0);
HYPRE_BoomerAMGSetCoarsenType(precon2, 0);
HYPRE_BoomerAMGSetMeasureType(precon2, 1);
HYPRE_BoomerAMGSetStrongThreshold(precon2, threshold);
HYPRE_BoomerAMGSetNumFunctions(precon2, 1);
HYPRE_BoomerAMGSetNumSweeps(precon2, nsweeps);
HYPRE_BoomerAMGSetRelaxType(precon2, relax_type);
hypre_BoomerAMGSetup(precon2, submatrices[3], NULL, NULL);
b_data->precon1 = precon1;
b_data->precon2 = precon2;
b_data->A11 = submatrices[0];
hypre_ParCSRMatrixDestroy(submatrices[1]);
b_data->A21 = submatrices[2];
b_data->A22 = submatrices[3];
hypre_TFree(submatrices);
return (0);
}