HYPRE_Int
hypre_HybridSolve( void *hybrid_vdata,
hypre_StructMatrix *A,
hypre_StructVector *b,
hypre_StructVector *x )
{
hypre_HybridData *hybrid_data = hybrid_vdata;
MPI_Comm comm = (hybrid_data -> comm);
HYPRE_Real tol = (hybrid_data -> tol);
HYPRE_Real cf_tol = (hybrid_data -> cf_tol);
HYPRE_Real pcg_atolf = (hybrid_data -> pcg_atolf);
HYPRE_Int dscg_max_its = (hybrid_data -> dscg_max_its);
HYPRE_Int pcg_max_its = (hybrid_data -> pcg_max_its);
HYPRE_Int two_norm = (hybrid_data -> two_norm);
HYPRE_Int stop_crit = (hybrid_data -> stop_crit);
HYPRE_Int rel_change = (hybrid_data -> rel_change);
HYPRE_Int logging = (hybrid_data -> logging);
HYPRE_Int print_level = (hybrid_data -> print_level);
HYPRE_Int solver_type = (hybrid_data -> solver_type);
HYPRE_Int k_dim = (hybrid_data -> k_dim);
HYPRE_Int pcg_default = (hybrid_data -> pcg_default);
HYPRE_Int (*pcg_precond_solve)();
HYPRE_Int (*pcg_precond_setup)();
void *pcg_precond;
void *pcg_solver;
hypre_PCGFunctions * pcg_functions;
hypre_GMRESFunctions * gmres_functions;
hypre_BiCGSTABFunctions * bicgstab_functions;
HYPRE_Int dscg_num_its;
HYPRE_Int pcg_num_its;
HYPRE_Int converged;
HYPRE_Real res_norm;
HYPRE_Int myid;
if (solver_type == 1)
{
/*--------------------------------------------------------------------
* Setup DSCG.
*--------------------------------------------------------------------*/
pcg_functions =
hypre_PCGFunctionsCreate(
hypre_CAlloc, hypre_StructKrylovFree,
hypre_StructKrylovCommInfo,
hypre_StructKrylovCreateVector,
hypre_StructKrylovDestroyVector, hypre_StructKrylovMatvecCreate,
hypre_StructKrylovMatvec, hypre_StructKrylovMatvecDestroy,
hypre_StructKrylovInnerProd, hypre_StructKrylovCopyVector,
hypre_StructKrylovClearVector,
hypre_StructKrylovScaleVector, hypre_StructKrylovAxpy,
hypre_StructKrylovIdentitySetup, hypre_StructKrylovIdentity );
pcg_solver = hypre_PCGCreate( pcg_functions );
hypre_PCGSetMaxIter(pcg_solver, dscg_max_its);
hypre_PCGSetTol(pcg_solver, tol);
hypre_PCGSetAbsoluteTolFactor(pcg_solver, pcg_atolf);
hypre_PCGSetConvergenceFactorTol(pcg_solver, cf_tol);
hypre_PCGSetTwoNorm(pcg_solver, two_norm);
hypre_PCGSetStopCrit(pcg_solver, stop_crit);
hypre_PCGSetRelChange(pcg_solver, rel_change);
hypre_PCGSetPrintLevel(pcg_solver, print_level);
hypre_PCGSetLogging(pcg_solver, logging);
pcg_precond = NULL;
hypre_PCGSetPrecond(pcg_solver,
HYPRE_StructDiagScale,
HYPRE_StructDiagScaleSetup,
pcg_precond);
hypre_PCGSetup(pcg_solver, (void*) A, (void*) b, (void*) x);
/*--------------------------------------------------------------------
* Solve with DSCG.
*--------------------------------------------------------------------*/
hypre_PCGSolve(pcg_solver, (void*) A, (void*) b, (void*) x);
/*--------------------------------------------------------------------
* Get information for DSCG.
*--------------------------------------------------------------------*/
hypre_PCGGetNumIterations(pcg_solver, &dscg_num_its);
(hybrid_data -> dscg_num_its) = dscg_num_its;
hypre_PCGGetFinalRelativeResidualNorm(pcg_solver, &res_norm);
/*--------------------------------------------------------------------
* Get additional information from PCG if logging on for hybrid solver.
* Currently used as debugging flag to print norms.
*--------------------------------------------------------------------*/
if( logging > 1 )
{
hypre_MPI_Comm_rank(comm, &myid );
hypre_PCGPrintLogging(pcg_solver, myid);
}
/*--------------------------------------------------------------------
* check if converged.
*--------------------------------------------------------------------*/
hypre_PCGGetConverged(pcg_solver, &converged);
}
else if (solver_type == 2)
{
/*--------------------------------------------------------------------
* Setup GMRES
*--------------------------------------------------------------------*/
gmres_functions =
hypre_GMRESFunctionsCreate(
hypre_CAlloc, hypre_StructKrylovFree,
hypre_StructKrylovCommInfo,
hypre_StructKrylovCreateVector,
hypre_StructKrylovCreateVectorArray,
hypre_StructKrylovDestroyVector, hypre_StructKrylovMatvecCreate,
hypre_StructKrylovMatvec, hypre_StructKrylovMatvecDestroy,
hypre_StructKrylovInnerProd, hypre_StructKrylovCopyVector,
hypre_StructKrylovClearVector,
hypre_StructKrylovScaleVector, hypre_StructKrylovAxpy,
hypre_StructKrylovIdentitySetup, hypre_StructKrylovIdentity );
pcg_solver = hypre_GMRESCreate( gmres_functions );
hypre_GMRESSetMaxIter(pcg_solver, dscg_max_its);
hypre_GMRESSetTol(pcg_solver, tol);
hypre_GMRESSetKDim(pcg_solver, k_dim);
hypre_GMRESSetConvergenceFactorTol(pcg_solver, cf_tol);
hypre_GMRESSetStopCrit(pcg_solver, stop_crit);
hypre_GMRESSetRelChange(pcg_solver, rel_change);
hypre_GMRESSetPrintLevel(pcg_solver, print_level);
hypre_GMRESSetPrintLevel(pcg_solver, print_level);
hypre_GMRESSetLogging(pcg_solver, logging);
pcg_precond = NULL;
hypre_GMRESSetPrecond(pcg_solver,
HYPRE_StructDiagScale,
HYPRE_StructDiagScaleSetup,
pcg_precond);
hypre_GMRESSetup(pcg_solver, (void*) A, (void*) b, (void*) x);
/*--------------------------------------------------------------------
* Solve with GMRES
*--------------------------------------------------------------------*/
hypre_GMRESSolve(pcg_solver, (void*) A, (void*) b, (void*) x);
/*--------------------------------------------------------------------
* Get information for GMRES
*--------------------------------------------------------------------*/
hypre_GMRESGetNumIterations(pcg_solver, &dscg_num_its);
(hybrid_data -> dscg_num_its) = dscg_num_its;
hypre_GMRESGetFinalRelativeResidualNorm(pcg_solver, &res_norm);
/*--------------------------------------------------------------------
* check if converged.
*--------------------------------------------------------------------*/
hypre_GMRESGetConverged(pcg_solver, &converged);
}
else
{
/*--------------------------------------------------------------------
* Setup BiCGSTAB
*--------------------------------------------------------------------*/
bicgstab_functions =
hypre_BiCGSTABFunctionsCreate(
hypre_StructKrylovCreateVector,
hypre_StructKrylovDestroyVector, hypre_StructKrylovMatvecCreate,
hypre_StructKrylovMatvec, hypre_StructKrylovMatvecDestroy,
hypre_StructKrylovInnerProd, hypre_StructKrylovCopyVector,
hypre_StructKrylovClearVector,
hypre_StructKrylovScaleVector, hypre_StructKrylovAxpy,
hypre_StructKrylovCommInfo,
hypre_StructKrylovIdentitySetup, hypre_StructKrylovIdentity );
pcg_solver = hypre_BiCGSTABCreate( bicgstab_functions );
hypre_BiCGSTABSetMaxIter(pcg_solver, dscg_max_its);
hypre_BiCGSTABSetTol(pcg_solver, tol);
hypre_BiCGSTABSetConvergenceFactorTol(pcg_solver, cf_tol);
hypre_BiCGSTABSetStopCrit(pcg_solver, stop_crit);
hypre_BiCGSTABSetPrintLevel(pcg_solver, print_level);
hypre_BiCGSTABSetLogging(pcg_solver, logging);
pcg_precond = NULL;
hypre_BiCGSTABSetPrecond(pcg_solver,
HYPRE_StructDiagScale,
HYPRE_StructDiagScaleSetup,
pcg_precond);
hypre_BiCGSTABSetup(pcg_solver, (void*) A, (void*) b, (void*) x);
/*--------------------------------------------------------------------
* Solve with BiCGSTAB
*--------------------------------------------------------------------*/
hypre_BiCGSTABSolve(pcg_solver, (void*) A, (void*) b, (void*) x);
/*--------------------------------------------------------------------
* Get information for BiCGSTAB
*--------------------------------------------------------------------*/
hypre_BiCGSTABGetNumIterations(pcg_solver, &dscg_num_its);
(hybrid_data -> dscg_num_its) = dscg_num_its;
hypre_BiCGSTABGetFinalRelativeResidualNorm(pcg_solver, &res_norm);
/*--------------------------------------------------------------------
* check if converged.
*--------------------------------------------------------------------*/
hypre_BiCGSTABGetConverged(pcg_solver, &converged);
}
/*-----------------------------------------------------------------------
* if converged, done...
*-----------------------------------------------------------------------*/
if( converged )
{
(hybrid_data -> final_rel_res_norm) = res_norm;
if (solver_type == 1)
hypre_PCGDestroy(pcg_solver);
else if (solver_type == 2)
hypre_GMRESDestroy(pcg_solver);
else
hypre_BiCGSTABDestroy(pcg_solver);
}
/*-----------------------------------------------------------------------
* ... otherwise, use SMG+solver
*-----------------------------------------------------------------------*/
else
{
/*--------------------------------------------------------------------
* Free up previous PCG solver structure and set up a new one.
*--------------------------------------------------------------------*/
if (solver_type == 1)
{
hypre_PCGDestroy(pcg_solver);
pcg_functions =
hypre_PCGFunctionsCreate(
hypre_CAlloc, hypre_StructKrylovFree,
hypre_StructKrylovCommInfo,
hypre_StructKrylovCreateVector,
hypre_StructKrylovDestroyVector, hypre_StructKrylovMatvecCreate,
hypre_StructKrylovMatvec, hypre_StructKrylovMatvecDestroy,
hypre_StructKrylovInnerProd, hypre_StructKrylovCopyVector,
hypre_StructKrylovClearVector,
hypre_StructKrylovScaleVector, hypre_StructKrylovAxpy,
hypre_StructKrylovIdentitySetup, hypre_StructKrylovIdentity );
pcg_solver = hypre_PCGCreate( pcg_functions );
hypre_PCGSetMaxIter(pcg_solver, pcg_max_its);
hypre_PCGSetTol(pcg_solver, tol);
hypre_PCGSetAbsoluteTolFactor(pcg_solver, pcg_atolf);
hypre_PCGSetTwoNorm(pcg_solver, two_norm);
hypre_PCGSetStopCrit(pcg_solver, stop_crit);
hypre_PCGSetRelChange(pcg_solver, rel_change);
hypre_PCGSetPrintLevel(pcg_solver, print_level);
hypre_PCGSetLogging(pcg_solver, logging);
}
else if (solver_type == 2)
{
hypre_GMRESDestroy(pcg_solver);
gmres_functions =
hypre_GMRESFunctionsCreate(
hypre_CAlloc, hypre_StructKrylovFree,
hypre_StructKrylovCommInfo,
hypre_StructKrylovCreateVector,
hypre_StructKrylovCreateVectorArray,
hypre_StructKrylovDestroyVector, hypre_StructKrylovMatvecCreate,
hypre_StructKrylovMatvec, hypre_StructKrylovMatvecDestroy,
hypre_StructKrylovInnerProd, hypre_StructKrylovCopyVector,
hypre_StructKrylovClearVector,
hypre_StructKrylovScaleVector, hypre_StructKrylovAxpy,
hypre_StructKrylovIdentitySetup, hypre_StructKrylovIdentity );
pcg_solver = hypre_GMRESCreate( gmres_functions );
hypre_GMRESSetMaxIter(pcg_solver, pcg_max_its);
hypre_GMRESSetTol(pcg_solver, tol);
hypre_GMRESSetKDim(pcg_solver, k_dim);
hypre_GMRESSetStopCrit(pcg_solver, stop_crit);
hypre_GMRESSetRelChange(pcg_solver, rel_change);
hypre_GMRESSetPrintLevel(pcg_solver, print_level);
hypre_GMRESSetLogging(pcg_solver, logging);
hypre_GMRESSetConvergenceFactorTol(pcg_solver, 0.0);
}
else
{
hypre_BiCGSTABDestroy(pcg_solver);
bicgstab_functions =
hypre_BiCGSTABFunctionsCreate(
hypre_StructKrylovCreateVector,
hypre_StructKrylovDestroyVector, hypre_StructKrylovMatvecCreate,
hypre_StructKrylovMatvec, hypre_StructKrylovMatvecDestroy,
hypre_StructKrylovInnerProd, hypre_StructKrylovCopyVector,
hypre_StructKrylovClearVector,
hypre_StructKrylovScaleVector, hypre_StructKrylovAxpy,
hypre_StructKrylovCommInfo,
hypre_StructKrylovIdentitySetup, hypre_StructKrylovIdentity );
pcg_solver = hypre_BiCGSTABCreate( bicgstab_functions );
hypre_BiCGSTABSetMaxIter(pcg_solver, pcg_max_its);
hypre_BiCGSTABSetTol(pcg_solver, tol);
hypre_BiCGSTABSetStopCrit(pcg_solver, stop_crit);
hypre_BiCGSTABSetPrintLevel(pcg_solver, print_level);
hypre_BiCGSTABSetLogging(pcg_solver, logging);
hypre_BiCGSTABSetConvergenceFactorTol(pcg_solver, 0.0);
}
/* Setup preconditioner */
if (pcg_default)
{
pcg_precond = hypre_SMGCreate(comm);
hypre_SMGSetMaxIter(pcg_precond, 1);
hypre_SMGSetTol(pcg_precond, 0.0);
hypre_SMGSetNumPreRelax(pcg_precond, 1);
hypre_SMGSetNumPostRelax(pcg_precond, 1);
hypre_SMGSetLogging(pcg_precond, 0);
pcg_precond_solve = hypre_SMGSolve;
pcg_precond_setup = hypre_SMGSetup;
}
else
{
pcg_precond = (hybrid_data -> pcg_precond);
pcg_precond_solve = (hybrid_data -> pcg_precond_solve);
pcg_precond_setup = (hybrid_data -> pcg_precond_setup);
}
/* Complete setup of solver+SMG */
if (solver_type == 1)
{
hypre_PCGSetPrecond(pcg_solver,
pcg_precond_solve, pcg_precond_setup, pcg_precond);
hypre_PCGSetup(pcg_solver, (void*) A, (void*) b, (void*) x);
/* Solve */
hypre_PCGSolve(pcg_solver, (void*) A, (void*) b, (void*) x);
/* Get information from PCG that is always logged in hybrid solver*/
hypre_PCGGetNumIterations(pcg_solver, &pcg_num_its);
(hybrid_data -> pcg_num_its) = pcg_num_its;
hypre_PCGGetFinalRelativeResidualNorm(pcg_solver, &res_norm);
(hybrid_data -> final_rel_res_norm) = res_norm;
/*-----------------------------------------------------------------
* Get additional information from PCG if logging on for hybrid solver.
* Currently used as debugging flag to print norms.
*-----------------------------------------------------------------*/
if( logging > 1 )
{
hypre_MPI_Comm_rank(comm, &myid );
hypre_PCGPrintLogging(pcg_solver, myid);
}
/* Free PCG and preconditioner */
hypre_PCGDestroy(pcg_solver);
}
else if (solver_type == 2)
{
hypre_GMRESSetPrecond(pcg_solver,
pcg_precond_solve, pcg_precond_setup, pcg_precond);
hypre_GMRESSetup(pcg_solver, (void*) A, (void*) b, (void*) x);
/* Solve */
hypre_GMRESSolve(pcg_solver, (void*) A, (void*) b, (void*) x);
/* Get information from GMRES that is always logged in hybrid solver*/
hypre_GMRESGetNumIterations(pcg_solver, &pcg_num_its);
(hybrid_data -> pcg_num_its) = pcg_num_its;
hypre_GMRESGetFinalRelativeResidualNorm(pcg_solver, &res_norm);
(hybrid_data -> final_rel_res_norm) = res_norm;
/* Free GMRES and preconditioner */
hypre_GMRESDestroy(pcg_solver);
}
else
{
hypre_BiCGSTABSetPrecond(pcg_solver, pcg_precond_solve,
pcg_precond_setup, pcg_precond);
hypre_BiCGSTABSetup(pcg_solver, (void*) A, (void*) b, (void*) x);
/* Solve */
hypre_BiCGSTABSolve(pcg_solver, (void*) A, (void*) b, (void*) x);
/* Get information from BiCGSTAB that is always logged in hybrid solver*/
hypre_BiCGSTABGetNumIterations(pcg_solver, &pcg_num_its);
(hybrid_data -> pcg_num_its) = pcg_num_its;
hypre_BiCGSTABGetFinalRelativeResidualNorm(pcg_solver, &res_norm);
(hybrid_data -> final_rel_res_norm) = res_norm;
/* Free BiCGSTAB and preconditioner */
hypre_BiCGSTABDestroy(pcg_solver);
}
if (pcg_default)
{
hypre_SMGDestroy(pcg_precond);
}
}
return hypre_error_flag;
}
int
HYPRE_GMRESGetFinalRelativeResidualNorm( HYPRE_Solver solver,
double *norm )
{
return( hypre_GMRESGetFinalRelativeResidualNorm( (void *) solver, norm ) );
}