Amesos2_Cholmod_def.hpp

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#ifndef AMESOS2_CHOLMOD_DEF_HPP
#define AMESOS2_CHOLMOD_DEF_HPP

#include <Teuchos_Tuple.hpp>
#include <Teuchos_ParameterList.hpp>
#include <Teuchos_StandardParameterEntryValidators.hpp>

#include "Amesos2_SolverCore_def.hpp"
#include "Amesos2_Cholmod_decl.hpp"


namespace Amesos2 {


template <class Matrix, class Vector>
Cholmod<Matrix,Vector>::Cholmod(
  Teuchos::RCP<const Matrix> A,
  Teuchos::RCP<Vector>       X,
  Teuchos::RCP<const Vector> B )
  : SolverCore<Amesos2::Cholmod,Matrix,Vector>(A, X, B)
  , nzvals_()                   // initialize to empty arrays
  , rowind_()
  , colptr_()
  , firstsolve(true)
  , map()
{
  CHOL::cholmod_start(&data_.c);
  (&data_.c)->nmethods=9;
  (&data_.c)->quick_return_if_not_posdef=1;

  //(&data_.c)->method[0].ordering=CHOLMOD_NATURAL;
  //(&data_.c)->print=5;
  data_.Y = NULL;
  data_.E = NULL;
}


template <class Matrix, class Vector>
Cholmod<Matrix,Vector>::~Cholmod( )
{
  CHOL::cholmod_free_factor (&(data_.L), &(data_.c));

  CHOL::cholmod_free_dense(&(data_.Y), &data_.c);
  CHOL::cholmod_free_dense(&(data_.E), &data_.c);

  CHOL::cholmod_finish(&(data_.c));
}

template<class Matrix, class Vector>
int
Cholmod<Matrix,Vector>::preOrdering_impl()
{
 #ifdef HAVE_AMESOS2_TIMERS
    Teuchos::TimeMonitor preOrderTimer(this->timers_.preOrderTime_);
#endif
    data_.L = CHOL::cholmod_analyze (&data_.A, &(data_.c));
    //data_.L->is_super=1;
    data_.L->is_ll=1;

    skip_symfact = true;
  
  return(0);
}


template <class Matrix, class Vector>
int
Cholmod<Matrix,Vector>::symbolicFactorization_impl()
{
  if ( !skip_symfact ){
#ifdef HAVE_AMESOS2_TIMERS
      Teuchos::TimeMonitor symFactTimer(this->timers_.symFactTime_);
#endif
      CHOL::cholmod_resymbol (&data_.A, NULL, 0, true, data_.L, &(data_.c));
    } else {
      /*
       * Symbolic factorization has already occured in preOrdering_impl,
       * but if the user calls this routine directly later, we need to
       * redo the symbolic factorization.
       */
      skip_symfact = false;
    }
  
  return(0);
}


template <class Matrix, class Vector>
int
Cholmod<Matrix,Vector>::numericFactorization_impl()
{
  using Teuchos::as;

  int info = 0;
  
#ifdef HAVE_AMESOS2_DEBUG
    TEUCHOS_TEST_FOR_EXCEPTION(data_.A.ncol != as<size_t>(this->globalNumCols_),
             std::runtime_error,
             "Error in converting to cholmod_sparse: wrong number of global columns." );
    TEUCHOS_TEST_FOR_EXCEPTION(data_.A.nrow != as<size_t>(this->globalNumRows_),
             std::runtime_error,
             "Error in converting to cholmod_sparse: wrong number of global rows." );
#endif

    { // Do factorization
#ifdef HAVE_AMESOS2_TIMERS
      Teuchos::TimeMonitor numFactTimer(this->timers_.numFactTime_);
#endif

#ifdef HAVE_AMESOS2_VERBOSE_DEBUG
      std::cout << "Cholmod:: Before numeric factorization" << std::endl;
      std::cout << "nzvals_ : " << nzvals_.toString() << std::endl;
      std::cout << "rowind_ : " << rowind_.toString() << std::endl;
      std::cout << "colptr_ : " << colptr_.toString() << std::endl;
#endif
      //cholmod_print_sparse(data_.A,"A",&(data_.c));
      CHOL::cholmod_factorize(&data_.A, data_.L, &(data_.c));
      //cholmod_print_factor(data_.L,"L",&(data_.c));
      info = (&data_.c)->status;
      
    }
    
  

  /* All processes should have the same error code */
  Teuchos::broadcast(*(this->matrixA_->getComm()), 0, &info);

  TEUCHOS_TEST_FOR_EXCEPTION(info == 2,
           std::runtime_error,
           "Memory allocation failure in Cholmod factorization");

  return(info);
}


template <class Matrix, class Vector>
int
Cholmod<Matrix,Vector>::solve_impl(const Teuchos::Ptr<MultiVecAdapter<Vector> >       X,
                                   const Teuchos::Ptr<const MultiVecAdapter<Vector> > B) const
{
  using Teuchos::as;

  const global_size_type ld_rhs = X->getGlobalLength();
  const size_t nrhs = X->getGlobalNumVectors();
  
  Teuchos::RCP<const Tpetra::Map<local_ordinal_type,
    global_ordinal_type, node_type> > map2;

  const size_t val_store_size = as<size_t>(ld_rhs * nrhs);
  Teuchos::Array<chol_type> xValues(val_store_size);
  Teuchos::Array<chol_type> bValues(val_store_size);

  {                             // Get values from RHS B
#ifdef HAVE_AMESOS2_TIMERS
    Teuchos::TimeMonitor mvConvTimer(this->timers_.vecConvTime_);
    Teuchos::TimeMonitor redistTimer( this->timers_.vecRedistTime_ );
#endif
    Util::get_1d_copy_helper<MultiVecAdapter<Vector>,
                             chol_type>::do_get(B, bValues(),
            as<size_t>(ld_rhs),
            ROOTED, this->rowIndexBase_);
      
  }

  
  int ierr = 0; // returned error code

    {
#ifdef HAVE_AMESOS2_TIMERS
      Teuchos::TimeMonitor mvConvTimer(this->timers_.vecConvTime_);
#endif

      function_map::cholmod_init_dense(as<int>(this->globalNumRows_),
               as<int>(nrhs), as<int>(ld_rhs),
               bValues.getRawPtr(), &data_.b);
      function_map::cholmod_init_dense(as<int>(this->globalNumRows_),
               as<int>(nrhs), as<int>(ld_rhs),
               xValues.getRawPtr(), &data_.x);
    }


    {                           // Do solve!
#ifdef HAVE_AMESOS2_TIMERS
      Teuchos::TimeMonitor solveTimer(this->timers_.solveTime_);
#endif

      CHOL::cholmod_dense *xtemp = &(data_.x);
      
      CHOL::cholmod_solve2(CHOLMOD_A, data_.L, &data_.b, NULL,
         &xtemp, NULL, &data_.Y, &data_.E, &data_.c);
      
      ierr = (&data_.c)->status;
    }
  

  
  /* All processes should have the same error code */
  Teuchos::broadcast(*(this->getComm()), 0, &ierr);

  TEUCHOS_TEST_FOR_EXCEPTION(ierr == -2, std::runtime_error, "Ran out of memory" );

  /* Update X's global values */
  {
#ifdef HAVE_AMESOS2_TIMERS
    Teuchos::TimeMonitor redistTimer(this->timers_.vecRedistTime_);
#endif
    
    Util::put_1d_data_helper<
      MultiVecAdapter<Vector>,chol_type>::do_put(X, xValues(),
             as<size_t>(ld_rhs),
             ROOTED, this->rowIndexBase_);
    
  }

  
  return(ierr);
}


template <class Matrix, class Vector>
bool
Cholmod<Matrix,Vector>::matrixShapeOK_impl() const
{
  return( this->matrixA_->getGlobalNumRows() == this->matrixA_->getGlobalNumCols() );
}


template <class Matrix, class Vector>
void
Cholmod<Matrix,Vector>::setParameters_impl(const Teuchos::RCP<Teuchos::ParameterList> & parameterList )
{
  using Teuchos::RCP;
  using Teuchos::getIntegralValue;
  using Teuchos::ParameterEntryValidator;

  RCP<const Teuchos::ParameterList> valid_params = getValidParameters_impl();


  if( parameterList->isParameter("Trans") ){
    RCP<const ParameterEntryValidator> trans_validator = valid_params->getEntry("Trans").validator();
    parameterList->getEntry("Trans").setValidator(trans_validator);

  }

  if( parameterList->isParameter("IterRefine") ){
    RCP<const ParameterEntryValidator> refine_validator = valid_params->getEntry("IterRefine").validator();
    parameterList->getEntry("IterRefine").setValidator(refine_validator);


  }

  if( parameterList->isParameter("ColPerm") ){
    RCP<const ParameterEntryValidator> colperm_validator = valid_params->getEntry("ColPerm").validator();
    parameterList->getEntry("ColPerm").setValidator(colperm_validator);


  }

  (&data_.c)->dbound = parameterList->get<double>("dbound", 0.0);

  bool prefer_upper = parameterList->get<bool>("PreferUpper", true);
  
  (&data_.c)->prefer_upper = prefer_upper ? 1 : 0;

  (&data_.c)->print = parameterList->get<int>("print",3);

  (&data_.c)->nmethods = parameterList->get<int>("nmethods",0);

}


template <class Matrix, class Vector>
Teuchos::RCP<const Teuchos::ParameterList>
Cholmod<Matrix,Vector>::getValidParameters_impl() const
{
  using std::string;
  using Teuchos::tuple;
  using Teuchos::ParameterList;
  using Teuchos::EnhancedNumberValidator;
  using Teuchos::setStringToIntegralParameter;
  using Teuchos::stringToIntegralParameterEntryValidator;

  static Teuchos::RCP<const Teuchos::ParameterList> valid_params;

  if( is_null(valid_params) ){
    Teuchos::RCP<Teuchos::ParameterList> pl = Teuchos::parameterList();


    Teuchos::RCP<EnhancedNumberValidator<int> > print_validator
      = Teuchos::rcp( new EnhancedNumberValidator<int>(0,5));

    Teuchos::RCP<EnhancedNumberValidator<int> > nmethods_validator
      = Teuchos::rcp( new EnhancedNumberValidator<int>(0,9));

    pl->set("nmethods", 0, "Specifies the number of different ordering methods to try", nmethods_validator);

    pl->set("print", 3, "Specifies the verbosity of the print statements", print_validator);

    pl->set("dbound", 0.0,
            "Specifies the smallest absolute value on the diagonal D for the LDL' factorization");


    pl->set("Equil", true, "Whether to equilibrate the system before solve");

    pl->set("PreferUpper", true,
            "Specifies whether the matrix will be " 
            "stored in upper triangular form.");

    valid_params = pl;
  }

  return valid_params;
}


template <class Matrix, class Vector>
bool
Cholmod<Matrix,Vector>::loadA_impl(EPhase current_phase)
{
  using Teuchos::as;

#ifdef HAVE_AMESOS2_TIMERS
  Teuchos::TimeMonitor convTimer(this->timers_.mtxConvTime_);
#endif

  // Only the root image needs storage allocated
  
  nzvals_.resize(this->globalNumNonZeros_);
  rowind_.resize(this->globalNumNonZeros_);
  colptr_.resize(this->globalNumCols_ + 1);
    

  int nnz_ret = 0;
  {
#ifdef HAVE_AMESOS2_TIMERS
    Teuchos::TimeMonitor mtxRedistTimer( this->timers_.mtxRedistTime_ );
#endif

    TEUCHOS_TEST_FOR_EXCEPTION(this->rowIndexBase_ != this->columnIndexBase_,
             std::runtime_error,
             "Row and column maps have different indexbase ");
    Util::get_ccs_helper<
    MatrixAdapter<Matrix>,chol_type,int,int>::do_get(this->matrixA_.ptr(),
                                                    nzvals_(), rowind_(),
                                                    colptr_(), nnz_ret, ROOTED,
                                                    ARBITRARY,
                                                    this->rowIndexBase_);
  }
  
  
  TEUCHOS_TEST_FOR_EXCEPTION(nnz_ret != as<int>(this->globalNumNonZeros_),
           std::runtime_error,
           "Did not get the expected number of non-zero vals");

  function_map::cholmod_init_sparse(as<size_t>(this->globalNumRows_),
            as<size_t>(this->globalNumCols_),
            as<size_t>(this->globalNumNonZeros_),
            0,
            colptr_.getRawPtr(),
            nzvals_.getRawPtr(),
            rowind_.getRawPtr(),
            &(data_.A));
  
  
  return true;
}


template<class Matrix, class Vector>
const char* Cholmod<Matrix,Vector>::name = "Cholmod";
  

} // end namespace Amesos2

#endif  // AMESOS2_CHOLMOD_DEF_HPP