pselinv_unsym.hpp

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/*
   Copyright (c) 2012 The Regents of the University of California,
   through Lawrence Berkeley National Laboratory.  

   Authors: Lin Lin and Mathias Jacquelin

   This file is part of PEXSI. All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are met:

   (1) Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
   (2) Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
   (3) Neither the name of the University of California, Lawrence Berkeley
   National Laboratory, U.S. Dept. of Energy nor the names of its contributors may
   be used to endorse or promote products derived from this software without
   specific prior written permission.

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   DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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   ("Enhancements") to anyone; however, if you choose to make your Enhancements
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*/
#ifndef _PEXSI_PSELINV_UNSYM_HPP_
#define _PEXSI_PSELINV_UNSYM_HPP_

// *********************************************************************
//  Common utilities
// *********************************************************************

#include  "pexsi/environment.hpp"
#include        "pexsi/NumVec.hpp"
#include        "pexsi/NumMat.hpp" 
#include  "pexsi/sparse_matrix.hpp"

#include  "pexsi/superlu_dist_interf.hpp"
#include  "pexsi/mpi_interf.hpp"
#include        "pexsi/utility.hpp"
#include        "pexsi/blas.hpp"
#include        "pexsi/lapack.hpp"
#include        "pexsi/pselinv.hpp"

#include <set>



namespace PEXSI{


    struct CDBuffers;

    template<typename T>
    bool LBlockEqualComparator(const LBlock<T> & a,const LBlock<T> & b){
      return a.blockIdx==b.blockIdx;
    }
    template<typename T>
    bool LBlockComparator(const LBlock<T> & a,const LBlock<T> & b){
      return a.blockIdx<b.blockIdx;
    }

    template<typename T>
    bool UBlockComparator(const UBlock<T> & a,const UBlock<T> & b){
      return a.blockIdx<b.blockIdx;
    }



  /**********************************************************************
   * Main data structure in PSelInv: PMatrixUnsym
   **********************************************************************/


  template<typename T>
  class PMatrixUnsym: public PMatrix<T>{

    protected:
      // *********************************************************************
      // Variables
      // *********************************************************************
      // Data variables

      std::vector<std::vector<UBlock<T> > > Ucol_;
      std::vector<std::vector<LBlock<T> > > Lrow_;

      std::vector<Int > UcolSize_;
      std::vector<Int > LrowSize_;

      // Communication variables
      // This is the tag used for mpi communication for selinv

      enum{
        SELINV_TAG_U_SIZE,
        SELINV_TAG_U_CONTENT,
        SELINV_TAG_L_SIZE,
        SELINV_TAG_L_CONTENT,
        SELINV_TAG_UCOL_SIZE,
        SELINV_TAG_UCOL_CONTENT,
        SELINV_TAG_LROW_SIZE,
        SELINV_TAG_LROW_CONTENT,
        SELINV_TAG_L_REDUCE,
        SELINV_TAG_U_REDUCE,
        SELINV_TAG_D_SIZE,
        SELINV_TAG_D_CONTENT,
        SELINV_TAG_D_REDUCE,
        SELINV_TAG_U_SIZE_CD,
        SELINV_TAG_U_CONTENT_CD,
        SELINV_TAG_L_SIZE_CD,
        SELINV_TAG_L_CONTENT_CD,
        SELINV_TAG_COUNT
      };




      struct SuperNodeBufferTypeUnsym:public PMatrix<T>::SuperNodeBufferType {
        NumMat<T>    UUpdateBuf;
        std::vector<Int>  ColLocalPtr;
        std::vector<Int>  BlockIdxLocalU;
        std::vector<char> SstrLrowSend;
        std::vector<char> SstrUcolSend;
        std::vector<char> SstrLrowRecv;
        std::vector<char> SstrUcolRecv;
        Int               SizeSstrLrowSend;
        Int               SizeSstrUcolSend;
        Int               SizeSstrLrowRecv;
        Int               SizeSstrUcolRecv;
      };

      inline void SelInvIntra_P2p(Int lidx);

      inline void SelInv_lookup_indexes(SuperNodeBufferTypeUnsym & snode,
                                        std::vector<LBlock<T> > & LcolRecv,
                                        std::vector<LBlock<T> > & LrowRecv,
                                        std::vector<UBlock<T> > & UcolRecv,
                                        std::vector<UBlock<T> > & UrowRecv,
                                        NumMat<T> & AinvBuf,
                                        NumMat<T> & LBuf,
                                        NumMat<T> & UBuf);

      inline void UnpackData( SuperNodeBufferTypeUnsym & snode,
                              std::vector<LBlock<T> > & LcolRecv,
                              std::vector<LBlock<T> > & LrowRecv,
                              std::vector<UBlock<T> > & UcolRecv,
                              std::vector<UBlock<T> > & UrowRecv
                            );

      inline void ComputeDiagUpdate(SuperNodeBufferTypeUnsym & snode);

      inline void SendRecvCD(
              std::vector<SuperNodeBufferTypeUnsym > & arrSuperNodes,
              Int stepSuper
                            );


    inline void SendRecvSizesCD(std::vector<Int > & arrSuperNodes, Int stepSuper, CDBuffers & buffers);
    inline void IRecvContentCD( std::vector<Int > & arrSuperNodes, Int stepSuper, CDBuffers & buffers);
    inline void WaitContentLCD( std::vector<Int > & arrSuperNodes, Int stepSuper, CDBuffers & buffers);
    inline void WaitContentUCD( std::vector<Int > & arrSuperNodes, Int stepSuper, CDBuffers & buffers);






    public:
      // *********************************************************************
      // Public member functions 
      // *********************************************************************

      PMatrixUnsym():PMatrix<T>() {}

      PMatrixUnsym( const GridType* g, const SuperNodeType* s, const PEXSI::PSelInvOptions * o, const PEXSI::SuperLUOptions * oLU  );

      //virtual ~PMatrixUnsym() { statusOFS<<"DESTRUCTOR UNSYM CALLED"<<std::endl;    }

      void Setup( const GridType* g, const SuperNodeType* s, const PEXSI::PSelInvOptions * o, const PEXSI::SuperLUOptions * oLU  );

      //Int NumBlockL( Int jLocal ) const { return L_[jLocal].size(); }

      //Int NumBlockU( Int iLocal ) const { return U_[iLocal].size(); }


      std::vector<LBlock<T> >& Lrow( Int iLocal ) { return Lrow_[iLocal]; }     

      std::vector<UBlock<T> >& Ucol( Int jLocal ) { return Ucol_[jLocal]; }


      virtual void ConstructCommunicationPattern( );


      void ConstructCommunicationPattern_P2p( );


      virtual void PreSelInv( );

      virtual void SelInv( );

      void SelInv_P2p( );

  };



} // namespace PEXSI


#include "pexsi/pselinv_unsym_impl.hpp"

#endif //_PEXSI_PSELINV_UNSYM_HPP_