load_balancer_util.h

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/*
 * Copyright (c) 2013-2015:  G-CSC, Goethe University Frankfurt
 * Author: Sebastian Reiter
 * 
 * This file is part of UG4.
 * 
 * UG4 is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License version 3 (as published by the
 * Free Software Foundation) with the following additional attribution
 * requirements (according to LGPL/GPL v3 §7):
 * 
 * (1) The following notice must be displayed in the Appropriate Legal Notices
 * of covered and combined works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (2) The following notice must be displayed at a prominent place in the
 * terminal output of covered works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (3) The following bibliography is recommended for citation and must be
 * preserved in all covered files:
 * "Reiter, S., Vogel, A., Heppner, I., Rupp, M., and Wittum, G. A massively
 *   parallel geometric multigrid solver on hierarchically distributed grids.
 *   Computing and visualization in science 16, 4 (2013), 151-164"
 * "Vogel, A., Reiter, S., Rupp, M., Nägel, A., and Wittum, G. UG4 -- a novel
 *   flexible software system for simulating pde based models on high performance
 *   computers. Computing and visualization in science 16, 4 (2013), 165-179"
 * 
 * This program 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.
 */
 
#ifndef __H__UG__load_balancer_util__
#define __H__UG__load_balancer_util__
 
#include "partitioner.h"
#include "lib_grid/algorithms/volume_calculation.h"
 
namespace ug{
 
SPProcessHierarchy
CreateProcessHierarchy(size_t* numElemsOnLvl, size_t numLvls,
             size_t minNumElemsPerProcPerLvl, size_t maxNumRedistProcs,
             size_t maxNumProcs, int minDistLvl,
             int maxLvlsWithoutRedist);
 
//
//template <int dim>
//class StdConnectionWeights : public ConnectionWeights<dim>{
//  public:
//    typedef ConnectionWeights<dim>      base_class;
//    typedef typename base_class::elem_type  elem_type;
//
//    StdConnectionWeights() : m_wgt(1.0)         {}
//    StdConnectionWeights(number wgt) : m_wgt(wgt)   {}
//    virtual ~StdConnectionWeights()           {}
//
//    virtual void set_weight(number wgt)         {m_wgt = wgt;}
//
//    virtual void set_grid(MultiGrid*, Attachment<MathVector<dim> >) {}
//    virtual void refresh_weights(int)         {}
//    virtual number get_weight(elem_type*, elem_type*) {return m_wgt;}
//
//  private:
//    number m_wgt;
//};
 
 
class StdBalanceWeights : public IBalanceWeights{
  public:
    StdBalanceWeights() :
      m_wgt(1.0)        {}
 
    virtual ~StdBalanceWeights()            {}
 
    virtual void set_weight(number wgt)         {m_wgt = wgt;}
    virtual void refresh_weights(int)         {}
 
    virtual number get_weight(Vertex* e)  {return m_wgt;}
    virtual number get_weight(Edge* e)    {return m_wgt;}
    virtual number get_weight(Face* e)    {return m_wgt;}
    virtual number get_weight(Volume* e)  {return m_wgt;}
 
  private:
    number    m_wgt;
};
 
 
template <int dim>
class AnisotropicBalanceWeights : public IBalanceWeights{
  public:
    typedef Attachment<MathVector<dim> >  position_attachment_t;
    typedef typename GeomObjBaseTypeByDim<dim>::base_obj_type elem_t;
    AnisotropicBalanceWeights() : m_weightFactor(1) {}
    virtual ~AnisotropicBalanceWeights()  {}
 
    virtual void set_weight_factor(number weightFactor)
    {
      m_weightFactor = weightFactor;
    }
 
    virtual number weight_factor() const  {return m_weightFactor;}
 
    virtual void set_grid(MultiGrid* mg, Attachment<MathVector<dim> > aPos)
    {
      m_aaPos.access(*mg, aPos);
    }
 
    virtual void refresh_weights(int baseLevel) {}
 
    virtual number get_weight(Vertex* e)  {return 1;}
    virtual number get_weight(Edge* e)    {return get_weight_impl(e);}
    virtual number get_weight(Face* e)    {return get_weight_impl(e);}
    virtual number get_weight(Volume* e)  {return get_weight_impl(e);}
 
  private:
    number get_weight_impl(elem_t* e){
      return CalculateVolume(e, m_aaPos) * m_weightFactor;
    }
 
    number get_weight_impl(GridObject* e){
      return 1;
    }
 
    number m_weightFactor;
    Grid::VertexAttachmentAccessor<position_attachment_t> m_aaPos;
 
};
 
 
}// end of namespace
 
#endif