void umf4sol (Int *sys, double x [ ], double b [ ], void **Numeric,
double Control [UMFPACK_CONTROL], double Info [UMFPACK_INFO])
{
Control [UMFPACK_IRSTEP] = 0 ;
(void) UMFPACK_solve (*sys, (Int *) NULL, (Int *) NULL, (double *) NULL,
x, b, *Numeric, Control, Info) ;
}
void MergedSolver::solve(double* local_x, const double* local_b)
{
const index_t rank = mpi_info->rank;
const dim_t count = counts[rank];
#ifdef ESYS_MPI
MPI_Gatherv(const_cast<double*>(local_b), count, MPI_DOUBLE, b, counts,
offset, MPI_DOUBLE, 0, mpi_info->comm);
#else
#pragma omp parallel for
for (dim_t i=0; i<count; i++) {
b[i] = local_b[i];
x[i] = local_x[i];
}
#endif
if (rank == 0) {
switch (A->solver_package) {
case PASO_MKL:
MKL_solve(A, x, b, reordering, refinements, verbose);
break;
case PASO_UMFPACK:
UMFPACK_solve(A, x, b, refinements, verbose);
break;
case PASO_SMOOTHER:
Preconditioner_LocalSmoother_solve(A, reinterpret_cast<Preconditioner_LocalSmoother*>(A->solver_p), x, b, sweeps, false);
break;
}
}
#ifdef ESYS_MPI
// now we need to distribute the solution to all ranks
MPI_Scatterv(x, counts, offset, MPI_DOUBLE, local_x, count, MPI_DOUBLE,
0, mpi_info->comm);
#else
#pragma omp parallel for
for (dim_t i=0; i<count; i++)
local_x[i] = x[i];
#endif
}
void umf4solr (Int *sys, Int Ap [ ], Int Ai [ ], double Ax [ ],
double x [ ], double b [ ], void **Numeric,
double Control [UMFPACK_CONTROL], double Info [UMFPACK_INFO])
{
(void) UMFPACK_solve (*sys, Ap, Ai, Ax, x, b, *Numeric, Control, Info) ;
}