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BddcMlSolver.cc 3.67 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.

extern "C" {
#include <bddcml_interface_c.h>
}

#include "parallel/BddcMlSolver.h"

namespace AMDiS {

#ifdef HAVE_BDDC_ML

  void BddcMlSolver::fillPetscMatrix(Matrix<DOFMatrix*> *mat)
  {
    FUNCNAME("BddcMlSolver::fillPetscMatrix()");
  }


  void BddcMlSolver::fillPetscRhs(SystemVector *vec)
  {
    FUNCNAME("BddcMlSolver::fillPetscRhs()");
  }


  void BddcMlSolver::solvePetscMatrix(SystemVector &vec, AdaptInfo *adaptInfo)
  {
    FUNCNAME("BddcMlSolver::solvePetscMatrix()");
    
    int nComponents = vec.getSize();
    const FiniteElemSüace *feSpace = vec.getFeSpace(0);
    Mesh *mesh = feSpace->getMesh();
    

    // === First, create a continous leaf element index on each subdomain ===

    std::set<int> leafElIndex;
    TraverseStack stack;
    ElInfo *elInfo = stack.traverseFirst(mesh, -1, Mesh::CALL_LEAF_EL);
    while (elInfo) {
      leafElIndex.insert(elInfo->getElement()->getIndex());
      elInfo = stack.traverseNext(elInfo);
    }

    map<int, int> mapElIndex;
    int c = nLeafEls;
    for (std::set<int>::iterator it = leafElIndex.begin();
	 it != leafElIndex.end(); ++it)
      mapElIndex[*it] = nLeafEls++;



    int nLevel = 1;
    int nSubdomains = meshDistributor->getMpiSize();
    int length = 1;
    int nSubPerProc = 1;
    MPI_Fint c2f = MPI_Comm_c2f(MPI::COMM_WORLD);
    int verboseLevel = 2;
    int numbase = 0;

    bddcml_init(&nLevel, &nSubdomains, &length, &nSubPerProc, 
		&c2f, &verboseLevel, &numbase);

    // global number of elements
    int nelem = mesh->getNumberOfLeaves();
    mpi::globalAdd(nelem);

    // global number of nodes
    int nnod = meshDistributor->getNumberOverallDofs(feSpace);

    // global number of dofs
    int ndof = nnod * nComponents;

    // space dimenstion
    int ndim = 2;

    // mesh dimension
    int meshdim = 2;

    // global indes of subdomain
    int isub = meshDistributor->getMpiRank();

    // local number of elements
    int nelems = nLeafEls;

    // local number of nodes
    int nnods = feSpace->getUsedSize();

    // local number of dofs
    int ndofs = nnods * nComponents;

    // Length of array inet
    int linet = nelems * 3;
    
    // Local array with indices of nodes on each element
    int inet[linet];
    elInfo = stack.traverseFirst(mesh, -1, Mesh::CALL_LEAF_EL);
    while (elInfo) {
      int localElIndex = mapElIndex[elInfo->getElement()->getIndex()];
      for (int i = 0; i < 3; i++)
	inet[localElIndex * 3 + i] = elInfo->getElement()->getDof(i, 0);
      elInfo = stack.traverseNext(elInfo);
    }


    // local array of number of nodes per element
    int nnet[nelems];
    for (int i = 0; i < nelems; i++)
      nnet[i] = 3;

    // local array with number of DOFs per node.
    int nndf[nnod];
    for (int i = 0; i < nnod; i++)
      nndf[i] = nComponents;

    // array of indices of subdomain nodes in global numbering
    int isngn[nnod];
    for (int i = 0; i < nnod; i++)
      nnod[i] = meshDistributor->mapLocalToGlobal(feSpace, i);

    // array of indices of subdomain variables in global numbering
    int isvgvn[ndof];

    /*
      bddcml_upload_subdomain_data(
      &nelem,
      &nnod,
      &ndof,
      &ndim,
      &meshdim,
      &isub,
      &nelems,
      &nnods,
      &ndofs,
      inet,
      &linet,
      nnet,
      &nelems,
      nndf,
      &nnods,
      isngn,
      &nnods,

      );
    */

    bddcml_finalize();
  }


  void BddcMlSolver::destroyMatrixData()
  {
    FUNCNAME("BddcMlSolver::destroyMatrixData()");
  }

#endif

}