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Reference documentation for deal.II version 9.6.0
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#include <deal.II/lac/petsc_solver.h>
Classes | |
struct | AdditionalData |
Public Member Functions | |
SolverTCQMR (SolverControl &cn, const AdditionalData &data=AdditionalData()) | |
SolverTCQMR (SolverControl &cn, const MPI_Comm mpi_communicator, const AdditionalData &data=AdditionalData()) | |
void | solve (const MatrixBase &A, VectorBase &x, const VectorBase &b, const PreconditionBase &preconditioner) |
virtual void | reset () |
void | set_prefix (const std::string &prefix) |
SolverControl & | control () const |
void | initialize (const PreconditionBase &preconditioner) |
KSP | petsc_ksp () |
operator KSP () const | |
Protected Member Functions | |
virtual void | set_solver_type (KSP &ksp) const override |
void | initialize_ksp_with_comm (const MPI_Comm comm) |
void | perhaps_set_convergence_test () const |
Protected Attributes | |
const AdditionalData | additional_data |
KSP | ksp |
SmartPointer< SolverControl, SolverBase > | solver_control |
std::string | prefix_name |
Static Private Member Functions | |
static PetscErrorCode | convergence_test (KSP ksp, const PetscInt iteration, const PetscReal residual_norm, KSPConvergedReason *reason, void *solver_control) |
An implementation of the solver interface using the PETSc TFQMR-2 solver (called TCQMR in PETSc). Note that this solver had a serious bug in versions up to and including PETSc 2.1.6, in that it did not check convergence and always returned an error code. Thus, this class will abort with an error indicating failure to converge with PETSc 2.1.6 and prior. This should be fixed in later versions of PETSc, though.
Definition at line 678 of file petsc_solver.h.
PETScWrappers::SolverTCQMR::SolverTCQMR | ( | SolverControl & | cn, |
const AdditionalData & | data = AdditionalData() ) |
Constructor. In contrast to deal.II's own solvers, there is no need to give a vector memory object.
The last argument takes a structure with additional, solver dependent flags for tuning.
Definition at line 514 of file petsc_solver.cc.
PETScWrappers::SolverTCQMR::SolverTCQMR | ( | SolverControl & | cn, |
const MPI_Comm | mpi_communicator, | ||
const AdditionalData & | data = AdditionalData() ) |
Constructor. This constructor is deprecated and ignores the MPI communicator argument. Use the other constructor instead.
Definition at line 520 of file petsc_solver.cc.
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overrideprotectedvirtual |
Function that takes a Krylov Subspace Solver context object, and sets the type of solver that is appropriate for this class.
Reimplemented from PETScWrappers::SolverBase.
Definition at line 528 of file petsc_solver.cc.
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inherited |
Solve the linear system Ax=b
. Depending on the information provided by derived classes and the object passed as a preconditioner, one of the linear solvers and preconditioners of PETSc is chosen. Repeated calls to solve() do not reconstruct the preconditioner for performance reasons. See class Documentation.
Definition at line 83 of file petsc_solver.cc.
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virtualinherited |
Resets the contained preconditioner and solver object. See class description for more details.
Definition at line 148 of file petsc_solver.cc.
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inherited |
Sets a prefix name for the solver object. Useful when customizing the PETSc KSP object with command-line options.
Definition at line 141 of file petsc_solver.cc.
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inherited |
Access to object that controls convergence.
Definition at line 155 of file petsc_solver.cc.
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inherited |
initialize the solver with the preconditioner. This function is intended for use with SLEPc spectral transformation class.
Definition at line 231 of file petsc_solver.cc.
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inherited |
Return the PETSc KSP object.
Definition at line 68 of file petsc_solver.cc.
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inherited |
Conversion operator to gain access to the underlying PETSc type. If you do this, you cut this class off some information it may need, so this conversion operator should only be used if you know what you do.
Definition at line 75 of file petsc_solver.cc.
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protectedinherited |
Utility to create the KSP object and attach convergence test.
Definition at line 206 of file petsc_solver.cc.
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protectedinherited |
Utility to use deal.II convergence testing.
This call changes the convergence criterion when the instance of the class has a SolverControl object associated.
Definition at line 222 of file petsc_solver.cc.
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staticprivateinherited |
A function that is used in PETSc as a callback to check on convergence. It takes the information provided from PETSc and checks it against deal.II's own SolverControl objects to see if convergence has been reached.
Definition at line 166 of file petsc_solver.cc.
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protected |
Store a copy of the flags for this particular solver.
Definition at line 712 of file petsc_solver.h.
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protectedinherited |
The PETSc KSP object.
Definition at line 167 of file petsc_solver.h.
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protectedinherited |
Reference to the object that controls convergence of the iterative solver. In fact, for these PETSc wrappers, PETSc does so itself, but we copy the data from this object before starting the solution process, and copy the data back into it afterwards.
Definition at line 175 of file petsc_solver.h.
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protectedinherited |
Solver prefix name to qualify options specific to the PETSc KSP object in the current context. Note: A hyphen (-) must NOT be given at the beginning of the prefix name. The first character of all runtime options is AUTOMATICALLY the hyphen.
Definition at line 205 of file petsc_solver.h.