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/**
* @file solver_petsc.hh
*
# @author Alejandro M. Aragón <alejandro.aragon@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date Mon Dec 13 10:48:06 2010
*
* @brief Solver class implementation for the petsc solver
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
// #ifndef __AKANTU_SOLVER_PETSC_HH__
// #define __AKANTU_SOLVER_PETSC_HH__
// #include <petscksp.h>
// #include "solver.hh"
// #include "static_communicator.hh"
// #include "sparse_matrix.hh"
// __BEGIN_AKANTU__
// struct SolverPETSc : public Solver, public CommunicatorEventHandler {
// typedef double value_type;
// typedef sparse_vector<value_type> sparse_vector_type;
// typedef SparseMatrix sparse_matrix_type;
// Mat A_; //!< linear system matrix
// Vec x_; //!< Solution vector
// KSP ksp_; //!< linear solver context
// bool allocated_;
// SolverPETSc(int argc, char *argv[]) : allocated_(false) {
// PetscInitialize(&argc, &argv,NULL,NULL);
// PetscErrorCode ierr;
// // create linear solver context
// ierr = KSPCreate(PETSC_COMM_WORLD, &ksp_);CHKERRCONTINUE(ierr);
// // initial nonzero guess
// ierr = KSPSetInitialGuessNonzero(ksp_,PETSC_TRUE); CHKERRCONTINUE(ierr);
// // set runtime options
// ierr = KSPSetFromOptions(ksp_);CHKERRCONTINUE(ierr);
// /*
// Set linear solver defaults for this problem (optional).
// - By extracting the KSP and PC contexts from the KSP context,
// we can then directly call any KSP and PC routines to set
// various options.
// - The following four statements are optional; all of these
// parameters could alternatively be specified at runtime via
// KSPSetFromOptions();
// */
// // ierr = KSPGetPC(ksp_,&pc);CHKERRCONTINUE(ierr);
// // ierr = PCSetType(pc,PCILU);CHKERRCONTINUE(ierr);
// // ierr = PCSetType(pc,PCJACOBI);CHKERRCONTINUE(ierr);
// ierr = KSPSetTolerances(ksp_,1.e-5,PETSC_DEFAULT,PETSC_DEFAULT,PETSC_DEFAULT);CHKERRCONTINUE(ierr);
// }
// //! Overload operator() to solve system of linear equations
// sparse_vector_type operator()(const sparse_matrix_type& AA, const sparse_vector_type& bb);
// //! Overload operator() to obtain reaction vector
// sparse_vector_type operator()(const sparse_matrix_type& Kpf, const sparse_matrix_type& Kpp, const sparse_vector_type& Up);
// //! Overload operator() to obtain the addition two vectors
// sparse_vector_type operator()(const sparse_vector_type& aa, const sparse_vector_type& bb);
// value_type norm(const sparse_matrix_type& aa, Element_insertion_type it = Add_t);
// value_type norm(const sparse_vector_type& aa, Element_insertion_type it = Add_t);
// // NOTE: the destructor will return an error if it is called after MPI_Finalize is
// // called because it uses collect communication to free-up allocated memory.
// ~SolverPETSc() {
// static bool exit = false;
// if (!exit) {
// // add finalize PETSc function at exit
// atexit(finalize);
// exit = true;
// }
// if (allocated_) {
// PetscErrorCode ierr = MatDestroy(&A_);CHKERRCONTINUE(ierr);
// ierr = VecDestroy(&x_);CHKERRCONTINUE(ierr);
// ierr = KSPDestroy(&ksp_);CHKERRCONTINUE(ierr);
// }
// }
// /* from the PETSc library, these are the options that can be passed
// to the command line
// Options Database Keys
// -options_table - Calls PetscOptionsView()
// -options_left - Prints unused options that remain in the database
// -objects_left - Prints list of all objects that have not been freed
// -mpidump - Calls PetscMPIDump()
// -malloc_dump - Calls PetscMallocDump()
// -malloc_info - Prints total memory usage
// -malloc_log - Prints summary of memory usage
// Options Database Keys for Profiling
// -log_summary [filename] - Prints summary of flop and timing information to screen.
// If the filename is specified the summary is written to the file. See PetscLogView().
// -log_summary_python [filename] - Prints data on of flop and timing usage to a file or screen.
// -log_all [filename] - Logs extensive profiling information See PetscLogDump().
// -log [filename] - Logs basic profiline information See PetscLogDump().
// -log_sync - Log the synchronization in scatters, inner products and norms
// -log_mpe [filename] - Creates a logfile viewable by the utility Upshot/Nupshot (in MPICH distribution)
// */
// static void finalize() {
// static bool finalized = false;
// if (!finalized) {
// cout<<"*** INFO *** PETSc is finalizing..."<<endl;
// // finalize PETSc
// PetscErrorCode ierr = PetscFinalize();CHKERRCONTINUE(ierr);
// finalized = true;
// cout<<"*** INFO *** Process "<<Parallel_base::rank_<<" is finalizing..."<<endl;
// // finalize MPI
// MPI_Finalize();
// }
// }
// };
// class SolverPETSc : public Solver, public CommunicatorEventHandler {
// /* ------------------------------------------------------------------------ */
// /* Constructors/Destructors */
// /* ------------------------------------------------------------------------ */
// public:
// SolverPETSc(SparseMatrix & sparse_matrix,
// const ID & id = "solver_petsc",
// const MemoryID & memory_id = 0);
// virtual SolverPETSc();
// /* ------------------------------------------------------------------------ */
// /* Methods */
// /* ------------------------------------------------------------------------ */
// public:
// /// build the profile and do the analysis part
// void initialize(SolverOptions & options = _solver_no_options);
// void initializeSlave(SolverOptions & options = _solver_no_options);
// /// factorize and solve the system
// void solve(Array<Real> & solution);
// void solve();
// void solveSlave();
// virtual void setRHS(Array<Real> & rhs);
// /// function to print the contain of the class
// // virtual void printself(std::ostream & stream, int indent = 0) const;
// virtual void onCommunicatorFinalize(const StaticCommunicator & communicator);
// private:
// void destroyMumpsData();
// inline Int & icntl(UInt i) {
// return mumps_data.icntl[i - 1];
// }
// inline Int & info(UInt i) {
// return mumps_data.info[i - 1];
// }
// void initMumpsData(SolverMumpsOptions::ParallelMethod parallel_method);
// /* ------------------------------------------------------------------------ */
// /* Accessors */
// /* ------------------------------------------------------------------------ */
// public:
// /* ------------------------------------------------------------------------ */
// /* Class Members */
// /* ------------------------------------------------------------------------ */
// private:
// /// mumps data
// DMUMPS_STRUC_C mumps_data;
// /// specify if the mumps_data are initialized or not
// bool is_mumps_data_initialized;
// UInt prank;
// /* ------------------------------------------------------------------------ */
// /* Local types */
// /* ------------------------------------------------------------------------ */
// private:
// SolverMumpsOptions::ParallelMethod parallel_method;
// bool rhs_is_local;
// enum SolverMumpsJob {
// _smj_initialize = -1,
// _smj_analyze = 1,
// _smj_factorize = 2,
// _smj_solve = 3,
// _smj_analyze_factorize = 4,
// _smj_factorize_solve = 5,
// _smj_complete = 6, // analyze, factorize, solve
// _smj_destroy = -2
// };
// };
// /* -------------------------------------------------------------------------- */
// /* inline functions */
// /* -------------------------------------------------------------------------- */
// //#include "solver_mumps_inline_impl.cc"
// /// standard output stream operator
// // inline std::ostream & operator <<(std::ostream & stream, const SolverMumps & _this)
// // {
// // _this.printself(stream);
// // return stream;
// // }
// __END_AKANTU__
// #endif /* __AKANTU_SOLVER_PETSC_HH__ */
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