ParallelCoarseSpaceMatVec.cc 4.16 KB
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//
// Software License for AMDiS
//
// Copyright (c) 2010 Dresden University of Technology 
// All rights reserved.
// Authors: Simon Vey, Thomas Witkowski et al.
//
// This file is part of AMDiS
//
// See also license.opensource.txt in the distribution.


#include "AMDiS.h"
#include "parallel/ParallelCoarseSpaceMatVec.h"

namespace AMDiS {

  using namespace std;

  void ParallelCoarseSpaceMatVec::create(ParallelDofMapping *iMap,
					 map<int, ParallelDofMapping*> cMap,
					 int subdomainLevel,
					 MPI::Intracomm mpiCommLocal,
					 MPI::Intracomm mpiCommGlobal)
  {
    FUNCNAME("ParallelCoarseSpaceMatVec::update()");

    interiorMap = iMap;
    coarseSpaceMap = cMap;
    

    vector<ParallelDofMapping*> uniqueCoarseMap;
    if (coarseSpaceMap.size()) {
      std::set<ParallelDofMapping*> tmp;
      for (map<int, ParallelDofMapping*>::iterator it = coarseSpaceMap.begin();
	   it != coarseSpaceMap.end(); ++it) {
	if (tmp.count(it->second) == 0) {	  
	  tmp.insert(it->second);
	  uniqueCoarseMap.push_back(it->second);
	}
      }
    }

    int nCoarseMap = uniqueCoarseMap.size();
    mat.resize(nCoarseMap + 1);
    for (int i = 0; i < nCoarseMap + 1; i++)
      mat[i].resize(nCoarseMap + 1);

    componentIthCoarseMap.resize(coarseSpaceMap.size());
    for (unsigned int i = 0; i < componentIthCoarseMap.size(); i++) {
      bool found = false;
      for (int j = 0; j < nCoarseMap; j++) {
	if (coarseSpaceMap[i] == uniqueCoarseMap[j]) {
	  componentIthCoarseMap[i] = j;
	  found = true;
	  break;
	}
      }
      
      TEST_EXIT_DBG(found)("Should not happen!\n");
    }
	   
    // === Create PETSc matrix with the computed nnz data structure. ===
    
    int nRankRows = interiorMap->getRankDofs();
    int nOverallRows = interiorMap->getOverallDofs();

    bool localMatrix = (coarseSpaceMap.size() && subdomainLevel == 0);

    if (localMatrix) {
      MatCreateSeqAIJ(mpiCommLocal, nRankRows, nOverallRows,
		      0, PETSC_NULL, 
		      &mat[0][0]);
      MatSetOption(mat[0][0], MAT_NEW_NONZERO_ALLOCATION_ERR, PETSC_FALSE);
    } else {
      MatCreateAIJ(mpiCommGlobal, nRankRows, nRankRows, 
		   nOverallRows, nOverallRows,
		   0, PETSC_NULL,
		   0, PETSC_NULL,
		   &mat[0][0]);
      MatSetOption(mat[0][0], MAT_NEW_NONZERO_ALLOCATION_ERR, PETSC_FALSE);
    }


    if (coarseSpaceMap.size()) {
      for (int i = 0; i < nCoarseMap; i++) {
	ParallelDofMapping* cMap = uniqueCoarseMap[i];

	int nRowsRankCoarse = cMap->getRankDofs();
	int nRowsOverallCoarse = cMap->getOverallDofs();
	
	MatCreateAIJ(mpiCommGlobal,
		     nRowsRankCoarse, nRowsRankCoarse,
		     nRowsOverallCoarse, nRowsOverallCoarse,
		     0, PETSC_NULL, 0, PETSC_NULL, 
		     &mat[i][i]);

	MSG("REMOVE THIS LINE WHEN FINISHED!\n");
	MatSetOption(mat[i][i], MAT_NEW_NONZERO_ALLOCATION_ERR, PETSC_FALSE);

	for (int j = 0; j < nCoarseMap + 1; j++) {
	  int nRowsRankMat = (j == 0 ? nRankRows : uniqueCoarseMap[j - 1]->getRankDofs());
	  int nRowsOverallMat = (j == 0 ? nOverallRows : uniqueCoarseMap[j - 1]->getOverallDofs());

	  MatCreateAIJ(mpiCommGlobal,
		       nRowsRankCoarse, nRowsRankMat,
		       nRowsOverallCoarse, nRowsOverallMat,
		       100, PETSC_NULL, 100, PETSC_NULL,
		       &mat[i + 1][j]);	  
	  MSG("REMOVE THIS LINE WHEN FINISHED!\n");
	  MatSetOption(mat[i + 1][j], MAT_NEW_NONZERO_ALLOCATION_ERR, PETSC_FALSE);

	  MatCreateAIJ(mpiCommGlobal,
		       nRowsRankMat, nRowsRankCoarse,
		       nRowsOverallMat, nRowsOverallCoarse,
		       0, PETSC_NULL, 0, PETSC_NULL,
		       &mat[j][i + 1]);
	  MSG("REMOVE THIS LINE WHEN FINISHED!\n");
	  MatSetOption(mat[j][i + 1], MAT_NEW_NONZERO_ALLOCATION_ERR, PETSC_FALSE);
	}
      }
    }
  }


  void ParallelCoarseSpaceMatVec::destroy()
  {
    FUNCNAME("ParallelCoarseSpaceMatVec::destroy()");

    int nMatrix = mat.size();
    for (int i = 0; i < nMatrix; i++)
      for (int j = 0; j < nMatrix; j++)
	MatDestroy(&mat[i][j]);
  }


  void ParallelCoarseSpaceMatVec::assembly()
  {
    FUNCNAME("ParallelCoarseSpaceMatVec::assembly()");

    int nMatrix = mat.size();
    for (int i = 0; i < nMatrix; i++) {
      for (int j = 0; j < nMatrix; j++) {
	MatAssemblyBegin(mat[i][j], MAT_FINAL_ASSEMBLY);
	MatAssemblyEnd(mat[i][j], MAT_FINAL_ASSEMBLY);  
      }
    }
  }

}