Struct Solvers

group StructSolvers

Linear solvers for structured grids.

These solvers use matrix/vector storage schemes that are tailored to structured grid problems.

Struct Solvers

typedef struct hypre_StructSolver_struct *HYPRE_StructSolver: The solver object.

typedef HYPRE_Int (*HYPRE_PtrToStructSolverFcn)(HYPRE_StructSolver, HYPRE_StructMatrix, HYPRE_StructVector, HYPRE_StructVector)

typedef HYPRE_Int (*HYPRE_PtrToModifyPCFcn)(HYPRE_Solver, HYPRE_Int, HYPRE_Real)

HYPRE_MODIFYPC

Struct Jacobi Solver

HYPRE_Int HYPRE_StructJacobiCreate(MPI_Comm comm, HYPRE_StructSolver *solver): Create a solver object.

HYPRE_Int HYPRE_StructJacobiDestroy(HYPRE_StructSolver solver)

Destroy a solver object.

An object should be explicitly destroyed using this destructor when the user’s code no longer needs direct access to it. Once destroyed, the object must not be referenced again. Note that the object may not be deallocated at the completion of this call, since there may be internal package references to the object. The object will then be destroyed when all internal reference counts go to zero.

HYPRE_Int HYPRE_StructJacobiSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

Prepare to solve the system.

The coefficient data in b and x is ignored here, but information about the layout of the data may be used.

HYPRE_Int HYPRE_StructJacobiSolve(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x): Solve the system.

HYPRE_Int HYPRE_StructJacobiSetTol(HYPRE_StructSolver solver, HYPRE_Real tol): (Optional) Set the convergence tolerance.

HYPRE_Int HYPRE_StructJacobiGetTol(HYPRE_StructSolver solver, HYPRE_Real *tol)

HYPRE_Int HYPRE_StructJacobiSetMaxIter(HYPRE_StructSolver solver, HYPRE_Int max_iter): (Optional) Set maximum number of iterations.

HYPRE_Int HYPRE_StructJacobiGetMaxIter(HYPRE_StructSolver solver, HYPRE_Int *max_iter)

HYPRE_Int HYPRE_StructJacobiSetZeroGuess(HYPRE_StructSolver solver)

(Optional) Use a zero initial guess.

This allows the solver to cut corners in the case where a zero initial guess is needed (e.g., for preconditioning) to reduce compuational cost.

HYPRE_Int HYPRE_StructJacobiGetZeroGuess(HYPRE_StructSolver solver, HYPRE_Int *zeroguess)

HYPRE_Int HYPRE_StructJacobiSetNonZeroGuess(HYPRE_StructSolver solver)

(Optional) Use a nonzero initial guess.

This is the default behavior, but this routine allows the user to switch back after using SetZeroGuess.

HYPRE_Int HYPRE_StructJacobiGetNumIterations(HYPRE_StructSolver solver, HYPRE_Int *num_iterations): Return the number of iterations taken.

HYPRE_Int HYPRE_StructJacobiGetFinalRelativeResidualNorm(HYPRE_StructSolver solver, HYPRE_Real *norm): Return the norm of the final relative residual.

Struct PFMG Solver

PFMG is a semicoarsening multigrid solver that uses pointwise relaxation.

For periodic problems, users should try to set the grid size in periodic dimensions to be as close to a power-of-two as possible. That is, if the grid size in a periodic dimension is given by \(N = 2^m * M\) where \(M\) is not a power-of-two, then \(M\) should be as small as possible. Large values of \(M\) will generally result in slower convergence rates.

HYPRE_Int HYPRE_StructPFMGCreate(MPI_Comm comm, HYPRE_StructSolver *solver): Create a solver object.

HYPRE_Int HYPRE_StructPFMGDestroy(HYPRE_StructSolver solver): Destroy a solver object.

HYPRE_Int HYPRE_StructPFMGSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

Prepare to solve the system.

The coefficient data in b and x is ignored here, but information about the layout of the data may be used.

HYPRE_Int HYPRE_StructPFMGSolve(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x): Solve the system.

HYPRE_Int HYPRE_StructPFMGSetTol(HYPRE_StructSolver solver, HYPRE_Real tol): (Optional) Set the convergence tolerance.

HYPRE_Int HYPRE_StructPFMGGetTol(HYPRE_StructSolver solver, HYPRE_Real *tol)

HYPRE_Int HYPRE_StructPFMGSetMaxIter(HYPRE_StructSolver solver, HYPRE_Int max_iter): (Optional) Set maximum number of iterations.

HYPRE_Int HYPRE_StructPFMGGetMaxIter(HYPRE_StructSolver solver, HYPRE_Int *max_iter)

HYPRE_Int HYPRE_StructPFMGSetMaxLevels(HYPRE_StructSolver solver, HYPRE_Int max_levels): (Optional) Set maximum number of multigrid grid levels.

HYPRE_Int HYPRE_StructPFMGGetMaxLevels(HYPRE_StructSolver solver, HYPRE_Int *max_levels)

HYPRE_Int HYPRE_StructPFMGSetRelChange(HYPRE_StructSolver solver, HYPRE_Int rel_change): (Optional) Additionally require that the relative difference in successive iterates be small.

HYPRE_Int HYPRE_StructPFMGGetRelChange(HYPRE_StructSolver solver, HYPRE_Int *rel_change)

HYPRE_Int HYPRE_StructPFMGSetZeroGuess(HYPRE_StructSolver solver)

(Optional) Use a zero initial guess.

This allows the solver to cut corners in the case where a zero initial guess is needed (e.g., for preconditioning) to reduce compuational cost.

HYPRE_Int HYPRE_StructPFMGGetZeroGuess(HYPRE_StructSolver solver, HYPRE_Int *zeroguess)

HYPRE_Int HYPRE_StructPFMGSetNonZeroGuess(HYPRE_StructSolver solver)

(Optional) Use a nonzero initial guess.

This is the default behavior, but this routine allows the user to switch back after using SetZeroGuess.

HYPRE_Int HYPRE_StructPFMGSetRelaxType(HYPRE_StructSolver solver, HYPRE_Int relax_type)

(Optional) Set relaxation type.

Current relaxation methods set by relax_type are:

0 : Jacobi
1 : Weighted Jacobi (default)
2 : Red/Black Gauss-Seidel (symmetric: RB pre-relaxation, BR post-relaxation)
3 : Red/Black Gauss-Seidel (nonsymmetric: RB pre- and post-relaxation)

HYPRE_Int HYPRE_StructPFMGGetRelaxType(HYPRE_StructSolver solver, HYPRE_Int *relax_type)

HYPRE_Int HYPRE_StructPFMGSetJacobiWeight(HYPRE_StructSolver solver, HYPRE_Real weight)

HYPRE_Int HYPRE_StructPFMGGetJacobiWeight(HYPRE_StructSolver solver, HYPRE_Real *weight)

HYPRE_Int HYPRE_StructPFMGSetRAPType(HYPRE_StructSolver solver, HYPRE_Int rap_type)

(Optional) Set type of coarse-grid operator to use.

Current operators set by rap_type are:

0 : Galerkin (default)
1 : non-Galerkin 5-pt or 7-pt stencils

Both operators are constructed algebraically. The non-Galerkin option maintains a 5-pt stencil in 2D and a 7-pt stencil in 3D on all grid levels. The stencil coefficients are computed by averaging techniques.

HYPRE_Int HYPRE_StructPFMGGetRAPType(HYPRE_StructSolver solver, HYPRE_Int *rap_type)

HYPRE_Int HYPRE_StructPFMGSetNumPreRelax(HYPRE_StructSolver solver, HYPRE_Int num_pre_relax): (Optional) Set number of relaxation sweeps before coarse-grid correction.

HYPRE_Int HYPRE_StructPFMGGetNumPreRelax(HYPRE_StructSolver solver, HYPRE_Int *num_pre_relax)

HYPRE_Int HYPRE_StructPFMGSetNumPostRelax(HYPRE_StructSolver solver, HYPRE_Int num_post_relax): (Optional) Set number of relaxation sweeps after coarse-grid correction.

HYPRE_Int HYPRE_StructPFMGGetNumPostRelax(HYPRE_StructSolver solver, HYPRE_Int *num_post_relax)

HYPRE_Int HYPRE_StructPFMGSetSkipRelax(HYPRE_StructSolver solver, HYPRE_Int skip_relax)

(Optional) Skip relaxation on certain grids for isotropic problems.

This can greatly improve efficiency by eliminating unnecessary relaxations when the underlying problem is isotropic.

HYPRE_Int HYPRE_StructPFMGGetSkipRelax(HYPRE_StructSolver solver, HYPRE_Int *skip_relax)

HYPRE_Int HYPRE_StructPFMGSetDxyz(HYPRE_StructSolver solver, HYPRE_Real *dxyz)

HYPRE_Int HYPRE_StructPFMGSetLogging(HYPRE_StructSolver solver, HYPRE_Int logging): (Optional) Set the amount of logging to do.

HYPRE_Int HYPRE_StructPFMGGetLogging(HYPRE_StructSolver solver, HYPRE_Int *logging)

HYPRE_Int HYPRE_StructPFMGSetPrintLevel(HYPRE_StructSolver solver, HYPRE_Int print_level): (Optional) Set the amount of printing to do to the screen.

HYPRE_Int HYPRE_StructPFMGGetPrintLevel(HYPRE_StructSolver solver, HYPRE_Int *print_level)

HYPRE_Int HYPRE_StructPFMGGetNumIterations(HYPRE_StructSolver solver, HYPRE_Int *num_iterations): Return the number of iterations taken.

HYPRE_Int HYPRE_StructPFMGGetFinalRelativeResidualNorm(HYPRE_StructSolver solver, HYPRE_Real *norm): Return the norm of the final relative residual.

Struct SMG Solver

SMG is a semicoarsening multigrid solver that uses plane smoothing (in 3D).

The plane smoother calls a 2D SMG algorithm with line smoothing, and the line smoother is cyclic reduction (1D SMG). For periodic problems, the grid size in periodic dimensions currently must be a power-of-two.

HYPRE_Int HYPRE_StructSMGCreate(MPI_Comm comm, HYPRE_StructSolver *solver): Create a solver object.

HYPRE_Int HYPRE_StructSMGDestroy(HYPRE_StructSolver solver): Destroy a solver object.

HYPRE_Int HYPRE_StructSMGSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

Prepare to solve the system.

The coefficient data in b and x is ignored here, but information about the layout of the data may be used.

HYPRE_Int HYPRE_StructSMGSolve(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x): Solve the system.

HYPRE_Int HYPRE_StructSMGSetMemoryUse(HYPRE_StructSolver solver, HYPRE_Int memory_use)

HYPRE_Int HYPRE_StructSMGGetMemoryUse(HYPRE_StructSolver solver, HYPRE_Int *memory_use)

HYPRE_Int HYPRE_StructSMGSetTol(HYPRE_StructSolver solver, HYPRE_Real tol): (Optional) Set the convergence tolerance.

HYPRE_Int HYPRE_StructSMGGetTol(HYPRE_StructSolver solver, HYPRE_Real *tol)

HYPRE_Int HYPRE_StructSMGSetMaxIter(HYPRE_StructSolver solver, HYPRE_Int max_iter): (Optional) Set maximum number of iterations.

HYPRE_Int HYPRE_StructSMGGetMaxIter(HYPRE_StructSolver solver, HYPRE_Int *max_iter)

HYPRE_Int HYPRE_StructSMGSetRelChange(HYPRE_StructSolver solver, HYPRE_Int rel_change): (Optional) Additionally require that the relative difference in successive iterates be small.

HYPRE_Int HYPRE_StructSMGGetRelChange(HYPRE_StructSolver solver, HYPRE_Int *rel_change)

HYPRE_Int HYPRE_StructSMGSetZeroGuess(HYPRE_StructSolver solver)

(Optional) Use a zero initial guess.

This allows the solver to cut corners in the case where a zero initial guess is needed (e.g., for preconditioning) to reduce compuational cost.

HYPRE_Int HYPRE_StructSMGGetZeroGuess(HYPRE_StructSolver solver, HYPRE_Int *zeroguess)

HYPRE_Int HYPRE_StructSMGSetNonZeroGuess(HYPRE_StructSolver solver)

(Optional) Use a nonzero initial guess.

This is the default behavior, but this routine allows the user to switch back after using SetZeroGuess.

HYPRE_Int HYPRE_StructSMGSetNumPreRelax(HYPRE_StructSolver solver, HYPRE_Int num_pre_relax): (Optional) Set number of relaxation sweeps before coarse-grid correction.

HYPRE_Int HYPRE_StructSMGGetNumPreRelax(HYPRE_StructSolver solver, HYPRE_Int *num_pre_relax)

HYPRE_Int HYPRE_StructSMGSetNumPostRelax(HYPRE_StructSolver solver, HYPRE_Int num_post_relax): (Optional) Set number of relaxation sweeps after coarse-grid correction.

HYPRE_Int HYPRE_StructSMGGetNumPostRelax(HYPRE_StructSolver solver, HYPRE_Int *num_post_relax)

HYPRE_Int HYPRE_StructSMGSetLogging(HYPRE_StructSolver solver, HYPRE_Int logging): (Optional) Set the amount of logging to do.

HYPRE_Int HYPRE_StructSMGGetLogging(HYPRE_StructSolver solver, HYPRE_Int *logging)

HYPRE_Int HYPRE_StructSMGSetPrintLevel(HYPRE_StructSolver solver, HYPRE_Int print_level): (Optional) Set the amount of printing to do to the screen.

HYPRE_Int HYPRE_StructSMGGetPrintLevel(HYPRE_StructSolver solver, HYPRE_Int *print_level)

HYPRE_Int HYPRE_StructSMGGetNumIterations(HYPRE_StructSolver solver, HYPRE_Int *num_iterations): Return the number of iterations taken.

HYPRE_Int HYPRE_StructSMGGetFinalRelativeResidualNorm(HYPRE_StructSolver solver, HYPRE_Real *norm): Return the norm of the final relative residual.

Struct CycRed Solver

CycRed is a cyclic reduction solver that simultaneously solves a collection of 1D tridiagonal systems embedded in a d-dimensional grid.

HYPRE_Int HYPRE_StructCycRedCreate(MPI_Comm comm, HYPRE_StructSolver *solver): Create a solver object.

HYPRE_Int HYPRE_StructCycRedDestroy(HYPRE_StructSolver solver): Destroy a solver object.

HYPRE_Int HYPRE_StructCycRedSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

Prepare to solve the system.

The coefficient data in b and x is ignored here, but information about the layout of the data may be used.

HYPRE_Int HYPRE_StructCycRedSolve(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x): Solve the system.

HYPRE_Int HYPRE_StructCycRedSetTDim(HYPRE_StructSolver solver, HYPRE_Int tdim)

(Optional) Set the dimension number for the embedded 1D tridiagonal systems.

The default is tdim = 0.

HYPRE_Int HYPRE_StructCycRedSetBase(HYPRE_StructSolver solver, HYPRE_Int ndim, HYPRE_Int *base_index, HYPRE_Int *base_stride)

(Optional) Set the base index and stride for the embedded 1D systems.

The stride must be equal one in the dimension corresponding to the 1D systems (see HYPRE_StructCycRedSetTDim).

Struct PCG Solver

These routines should be used in conjunction with the generic interface in Krylov Solvers.

HYPRE_Int HYPRE_StructPCGCreate(MPI_Comm comm, HYPRE_StructSolver *solver): Create a solver object.

HYPRE_Int HYPRE_StructPCGDestroy(HYPRE_StructSolver solver): Destroy a solver object.

HYPRE_Int HYPRE_StructPCGSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructPCGSolve(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructPCGSetTol(HYPRE_StructSolver solver, HYPRE_Real tol)

HYPRE_Int HYPRE_StructPCGSetAbsoluteTol(HYPRE_StructSolver solver, HYPRE_Real tol)

HYPRE_Int HYPRE_StructPCGSetMaxIter(HYPRE_StructSolver solver, HYPRE_Int max_iter)

HYPRE_Int HYPRE_StructPCGSetTwoNorm(HYPRE_StructSolver solver, HYPRE_Int two_norm)

HYPRE_Int HYPRE_StructPCGSetRelChange(HYPRE_StructSolver solver, HYPRE_Int rel_change)

HYPRE_Int HYPRE_StructPCGSetPrecond(HYPRE_StructSolver solver, HYPRE_PtrToStructSolverFcn precond, HYPRE_PtrToStructSolverFcn precond_setup, HYPRE_StructSolver precond_solver)

HYPRE_Int HYPRE_StructPCGSetLogging(HYPRE_StructSolver solver, HYPRE_Int logging)

HYPRE_Int HYPRE_StructPCGSetPrintLevel(HYPRE_StructSolver solver, HYPRE_Int level)

HYPRE_Int HYPRE_StructPCGGetNumIterations(HYPRE_StructSolver solver, HYPRE_Int *num_iterations)

HYPRE_Int HYPRE_StructPCGGetFinalRelativeResidualNorm(HYPRE_StructSolver solver, HYPRE_Real *norm)

HYPRE_Int HYPRE_StructPCGGetResidual(HYPRE_StructSolver solver, void **residual)

HYPRE_Int HYPRE_StructDiagScaleSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector y, HYPRE_StructVector x): Setup routine for diagonal preconditioning.

HYPRE_Int HYPRE_StructDiagScale(HYPRE_StructSolver solver, HYPRE_StructMatrix HA, HYPRE_StructVector Hy, HYPRE_StructVector Hx): Solve routine for diagonal preconditioning.

Struct GMRES Solver

These routines should be used in conjunction with the generic interface in Krylov Solvers.

HYPRE_Int HYPRE_StructGMRESCreate(MPI_Comm comm, HYPRE_StructSolver *solver): Create a solver object.

HYPRE_Int HYPRE_StructGMRESDestroy(HYPRE_StructSolver solver): Destroy a solver object.

HYPRE_Int HYPRE_StructGMRESSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructGMRESSolve(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructGMRESSetTol(HYPRE_StructSolver solver, HYPRE_Real tol)

HYPRE_Int HYPRE_StructGMRESSetAbsoluteTol(HYPRE_StructSolver solver, HYPRE_Real tol)

HYPRE_Int HYPRE_StructGMRESSetMaxIter(HYPRE_StructSolver solver, HYPRE_Int max_iter)

HYPRE_Int HYPRE_StructGMRESSetKDim(HYPRE_StructSolver solver, HYPRE_Int k_dim)

HYPRE_Int HYPRE_StructGMRESSetPrecond(HYPRE_StructSolver solver, HYPRE_PtrToStructSolverFcn precond, HYPRE_PtrToStructSolverFcn precond_setup, HYPRE_StructSolver precond_solver)

HYPRE_Int HYPRE_StructGMRESSetLogging(HYPRE_StructSolver solver, HYPRE_Int logging)

HYPRE_Int HYPRE_StructGMRESSetPrintLevel(HYPRE_StructSolver solver, HYPRE_Int level)

HYPRE_Int HYPRE_StructGMRESGetNumIterations(HYPRE_StructSolver solver, HYPRE_Int *num_iterations)

HYPRE_Int HYPRE_StructGMRESGetFinalRelativeResidualNorm(HYPRE_StructSolver solver, HYPRE_Real *norm)

HYPRE_Int HYPRE_StructGMRESGetResidual(HYPRE_StructSolver solver, void **residual)

Struct FlexGMRES Solver

These routines should be used in conjunction with the generic interface in Krylov Solvers.

HYPRE_Int HYPRE_StructFlexGMRESCreate(MPI_Comm comm, HYPRE_StructSolver *solver): Create a solver object.

HYPRE_Int HYPRE_StructFlexGMRESDestroy(HYPRE_StructSolver solver): Destroy a solver object.

HYPRE_Int HYPRE_StructFlexGMRESSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructFlexGMRESSolve(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructFlexGMRESSetTol(HYPRE_StructSolver solver, HYPRE_Real tol)

HYPRE_Int HYPRE_StructFlexGMRESSetAbsoluteTol(HYPRE_StructSolver solver, HYPRE_Real tol)

HYPRE_Int HYPRE_StructFlexGMRESSetMaxIter(HYPRE_StructSolver solver, HYPRE_Int max_iter)

HYPRE_Int HYPRE_StructFlexGMRESSetKDim(HYPRE_StructSolver solver, HYPRE_Int k_dim)

HYPRE_Int HYPRE_StructFlexGMRESSetPrecond(HYPRE_StructSolver solver, HYPRE_PtrToStructSolverFcn precond, HYPRE_PtrToStructSolverFcn precond_setup, HYPRE_StructSolver precond_solver)

HYPRE_Int HYPRE_StructFlexGMRESSetLogging(HYPRE_StructSolver solver, HYPRE_Int logging)

HYPRE_Int HYPRE_StructFlexGMRESSetPrintLevel(HYPRE_StructSolver solver, HYPRE_Int level)

HYPRE_Int HYPRE_StructFlexGMRESGetNumIterations(HYPRE_StructSolver solver, HYPRE_Int *num_iterations)

HYPRE_Int HYPRE_StructFlexGMRESGetFinalRelativeResidualNorm(HYPRE_StructSolver solver, HYPRE_Real *norm)

HYPRE_Int HYPRE_StructFlexGMRESGetResidual(HYPRE_StructSolver solver, void **residual)

HYPRE_Int HYPRE_StructFlexGMRESSetModifyPC(HYPRE_StructSolver solver, HYPRE_PtrToModifyPCFcn modify_pc)

Struct LGMRES Solver

These routines should be used in conjunction with the generic interface in Krylov Solvers.

HYPRE_Int HYPRE_StructLGMRESCreate(MPI_Comm comm, HYPRE_StructSolver *solver): Create a solver object.

HYPRE_Int HYPRE_StructLGMRESDestroy(HYPRE_StructSolver solver): Destroy a solver object.

HYPRE_Int HYPRE_StructLGMRESSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructLGMRESSolve(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructLGMRESSetTol(HYPRE_StructSolver solver, HYPRE_Real tol)

HYPRE_Int HYPRE_StructLGMRESSetAbsoluteTol(HYPRE_StructSolver solver, HYPRE_Real tol)

HYPRE_Int HYPRE_StructLGMRESSetMaxIter(HYPRE_StructSolver solver, HYPRE_Int max_iter)

HYPRE_Int HYPRE_StructLGMRESSetKDim(HYPRE_StructSolver solver, HYPRE_Int k_dim)

HYPRE_Int HYPRE_StructLGMRESSetAugDim(HYPRE_StructSolver solver, HYPRE_Int aug_dim)

HYPRE_Int HYPRE_StructLGMRESSetPrecond(HYPRE_StructSolver solver, HYPRE_PtrToStructSolverFcn precond, HYPRE_PtrToStructSolverFcn precond_setup, HYPRE_StructSolver precond_solver)

HYPRE_Int HYPRE_StructLGMRESSetLogging(HYPRE_StructSolver solver, HYPRE_Int logging)

HYPRE_Int HYPRE_StructLGMRESSetPrintLevel(HYPRE_StructSolver solver, HYPRE_Int level)

HYPRE_Int HYPRE_StructLGMRESGetNumIterations(HYPRE_StructSolver solver, HYPRE_Int *num_iterations)

HYPRE_Int HYPRE_StructLGMRESGetFinalRelativeResidualNorm(HYPRE_StructSolver solver, HYPRE_Real *norm)

HYPRE_Int HYPRE_StructLGMRESGetResidual(HYPRE_StructSolver solver, void **residual)

Struct BiCGSTAB Solver

These routines should be used in conjunction with the generic interface in Krylov Solvers.

HYPRE_Int HYPRE_StructBiCGSTABCreate(MPI_Comm comm, HYPRE_StructSolver *solver): Create a solver object.

HYPRE_Int HYPRE_StructBiCGSTABDestroy(HYPRE_StructSolver solver): Destroy a solver object.

HYPRE_Int HYPRE_StructBiCGSTABSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructBiCGSTABSolve(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructBiCGSTABSetTol(HYPRE_StructSolver solver, HYPRE_Real tol)

HYPRE_Int HYPRE_StructBiCGSTABSetAbsoluteTol(HYPRE_StructSolver solver, HYPRE_Real tol)

HYPRE_Int HYPRE_StructBiCGSTABSetMaxIter(HYPRE_StructSolver solver, HYPRE_Int max_iter)

HYPRE_Int HYPRE_StructBiCGSTABSetPrecond(HYPRE_StructSolver solver, HYPRE_PtrToStructSolverFcn precond, HYPRE_PtrToStructSolverFcn precond_setup, HYPRE_StructSolver precond_solver)

HYPRE_Int HYPRE_StructBiCGSTABSetLogging(HYPRE_StructSolver solver, HYPRE_Int logging)

HYPRE_Int HYPRE_StructBiCGSTABSetPrintLevel(HYPRE_StructSolver solver, HYPRE_Int level)

HYPRE_Int HYPRE_StructBiCGSTABGetNumIterations(HYPRE_StructSolver solver, HYPRE_Int *num_iterations)

HYPRE_Int HYPRE_StructBiCGSTABGetFinalRelativeResidualNorm(HYPRE_StructSolver solver, HYPRE_Real *norm)

HYPRE_Int HYPRE_StructBiCGSTABGetResidual(HYPRE_StructSolver solver, void **residual)

Struct Hybrid Solver

HYPRE_Int HYPRE_StructHybridCreate(MPI_Comm comm, HYPRE_StructSolver *solver): Create a solver object.

HYPRE_Int HYPRE_StructHybridDestroy(HYPRE_StructSolver solver): Destroy a solver object.

HYPRE_Int HYPRE_StructHybridSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

Prepare to solve the system.

The coefficient data in b and x is ignored here, but information about the layout of the data may be used.

HYPRE_Int HYPRE_StructHybridSolve(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x): Solve the system.

HYPRE_Int HYPRE_StructHybridSetTol(HYPRE_StructSolver solver, HYPRE_Real tol): (Optional) Set the convergence tolerance.

HYPRE_Int HYPRE_StructHybridSetConvergenceTol(HYPRE_StructSolver solver, HYPRE_Real cf_tol)

(Optional) Set an accepted convergence tolerance for diagonal scaling (DS).

The solver will switch preconditioners if the convergence of DS is slower than cf_tol.

HYPRE_Int HYPRE_StructHybridSetDSCGMaxIter(HYPRE_StructSolver solver, HYPRE_Int ds_max_its)

(Optional) Set maximum number of iterations for diagonal scaling (DS).

The solver will switch preconditioners if DS reaches ds_max_its.

HYPRE_Int HYPRE_StructHybridSetPCGMaxIter(HYPRE_StructSolver solver, HYPRE_Int pre_max_its)

(Optional) Set maximum number of iterations for general preconditioner (PRE).

The solver will stop if PRE reaches pre_max_its.

HYPRE_Int HYPRE_StructHybridSetTwoNorm(HYPRE_StructSolver solver, HYPRE_Int two_norm): (Optional) Use the two-norm in stopping criteria.

HYPRE_Int HYPRE_StructHybridSetStopCrit(HYPRE_StructSolver solver, HYPRE_Int stop_crit)

HYPRE_Int HYPRE_StructHybridSetRelChange(HYPRE_StructSolver solver, HYPRE_Int rel_change): (Optional) Additionally require that the relative difference in successive iterates be small.

HYPRE_Int HYPRE_StructHybridSetSolverType(HYPRE_StructSolver solver, HYPRE_Int solver_type)

(Optional) Set the type of Krylov solver to use.

Current krylov methods set by solver_type are:

0 : PCG (default)
1 : GMRES
2 : BiCGSTAB

HYPRE_Int HYPRE_StructHybridSetRecomputeResidual(HYPRE_StructSolver solver, HYPRE_Int recompute_residual): (Optional) Set recompute residual (don’t rely on 3-term recurrence).

HYPRE_Int HYPRE_StructHybridGetRecomputeResidual(HYPRE_StructSolver solver, HYPRE_Int *recompute_residual): (Optional) Get recompute residual option.

HYPRE_Int HYPRE_StructHybridSetRecomputeResidualP(HYPRE_StructSolver solver, HYPRE_Int recompute_residual_p)

(Optional) Set recompute residual period (don’t rely on 3-term recurrence).

Recomputes residual after every specified number of iterations.

HYPRE_Int HYPRE_StructHybridGetRecomputeResidualP(HYPRE_StructSolver solver, HYPRE_Int *recompute_residual_p): (Optional) Get recompute residual period option.

HYPRE_Int HYPRE_StructHybridSetKDim(HYPRE_StructSolver solver, HYPRE_Int k_dim): (Optional) Set the maximum size of the Krylov space when using GMRES.

HYPRE_Int HYPRE_StructHybridSetPrecond(HYPRE_StructSolver solver, HYPRE_PtrToStructSolverFcn precond, HYPRE_PtrToStructSolverFcn precond_setup, HYPRE_StructSolver precond_solver): (Optional) Set the preconditioner to use.

HYPRE_Int HYPRE_StructHybridSetLogging(HYPRE_StructSolver solver, HYPRE_Int logging): (Optional) Set the amount of logging to do.

HYPRE_Int HYPRE_StructHybridSetPrintLevel(HYPRE_StructSolver solver, HYPRE_Int print_level): (Optional) Set the amount of printing to do to the screen.

HYPRE_Int HYPRE_StructHybridGetNumIterations(HYPRE_StructSolver solver, HYPRE_Int *num_its): Return the number of iterations taken.

HYPRE_Int HYPRE_StructHybridGetDSCGNumIterations(HYPRE_StructSolver solver, HYPRE_Int *ds_num_its): Return the number of diagonal scaling iterations taken.

HYPRE_Int HYPRE_StructHybridGetPCGNumIterations(HYPRE_StructSolver solver, HYPRE_Int *pre_num_its): Return the number of general preconditioning iterations taken.

HYPRE_Int HYPRE_StructHybridGetFinalRelativeResidualNorm(HYPRE_StructSolver solver, HYPRE_Real *norm): Return the norm of the final relative residual.

HYPRE_Int HYPRE_StructHybridSetPCGAbsoluteTolFactor(HYPRE_StructSolver solver, HYPRE_Real pcg_atolf)

Struct LOBPCG Eigensolver

These routines should be used in conjunction with the generic interface in Eigensolvers.

HYPRE_Int HYPRE_StructSetupInterpreter(mv_InterfaceInterpreter *i)

Load interface interpreter.

Vector part loaded with hypre_StructKrylov functions and multivector part loaded with mv_TempMultiVector functions.

HYPRE_Int HYPRE_StructSetupMatvec(HYPRE_MatvecFunctions *mv): Load Matvec interpreter with hypre_StructKrylov functions.

Functions

HYPRE_Int HYPRE_StructSparseMSGCreate(MPI_Comm comm, HYPRE_StructSolver *solver)

HYPRE_Int HYPRE_StructSparseMSGDestroy(HYPRE_StructSolver solver)

HYPRE_Int HYPRE_StructSparseMSGSetup(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructSparseMSGSolve(HYPRE_StructSolver solver, HYPRE_StructMatrix A, HYPRE_StructVector b, HYPRE_StructVector x)

HYPRE_Int HYPRE_StructSparseMSGSetTol(HYPRE_StructSolver solver, HYPRE_Real tol)

HYPRE_Int HYPRE_StructSparseMSGSetMaxIter(HYPRE_StructSolver solver, HYPRE_Int max_iter)

HYPRE_Int HYPRE_StructSparseMSGSetJump(HYPRE_StructSolver solver, HYPRE_Int jump)

HYPRE_Int HYPRE_StructSparseMSGSetRelChange(HYPRE_StructSolver solver, HYPRE_Int rel_change)

HYPRE_Int HYPRE_StructSparseMSGSetZeroGuess(HYPRE_StructSolver solver)

HYPRE_Int HYPRE_StructSparseMSGSetNonZeroGuess(HYPRE_StructSolver solver)

HYPRE_Int HYPRE_StructSparseMSGSetRelaxType(HYPRE_StructSolver solver, HYPRE_Int relax_type)

HYPRE_Int HYPRE_StructSparseMSGSetJacobiWeight(HYPRE_StructSolver solver, HYPRE_Real weight)

HYPRE_Int HYPRE_StructSparseMSGSetNumPreRelax(HYPRE_StructSolver solver, HYPRE_Int num_pre_relax)

HYPRE_Int HYPRE_StructSparseMSGSetNumPostRelax(HYPRE_StructSolver solver, HYPRE_Int num_post_relax)

HYPRE_Int HYPRE_StructSparseMSGSetNumFineRelax(HYPRE_StructSolver solver, HYPRE_Int num_fine_relax)

HYPRE_Int HYPRE_StructSparseMSGSetLogging(HYPRE_StructSolver solver, HYPRE_Int logging)

HYPRE_Int HYPRE_StructSparseMSGSetPrintLevel(HYPRE_StructSolver solver, HYPRE_Int print_level)

HYPRE_Int HYPRE_StructSparseMSGGetNumIterations(HYPRE_StructSolver solver, HYPRE_Int *num_iterations)

HYPRE_Int HYPRE_StructSparseMSGGetFinalRelativeResidualNorm(HYPRE_StructSolver solver, HYPRE_Real *norm)