CostMetrics.h

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// This file is part of the Peano project. For conditions of distribution and
// use, please see the copyright notice at www.peano-framework.org
#pragma once
 
namespace toolbox {
  namespace loadbalancing {
    class CostMetrics;
  }
}
 
 
 
#include "tarch/mpi/mpi.h"
#include "tarch/logging/Log.h"
#include <string>
 
 
class toolbox::loadbalancing::CostMetrics {
  public:
    CostMetrics();
    virtual ~CostMetrics() = default;
 
    virtual std::string toString() const = 0;
 
    std::string toString(const std::string& metricName) const;
 
    virtual void waitForGlobalDataExchange();
 
    virtual void updateGlobalView();
 
    virtual double getCostOfLocalTree(int spacetreeNumber) const = 0;
 
    virtual double getCostOfLocalRank() const;
 
    virtual double getGlobalCost() const;
 
    virtual int getLightestRank() const;
 
    virtual double getMinimumOfMaximumRankWeights() const;
 
  protected:
    struct ReductionBuffer {
      double   _weight;
      int      _rank;
    };
 
    double _localRankWeight;
 
    double           _globalWeight;
    ReductionBuffer  _lightestRank;
    double           _minimumOfMaximumOfRankWeights;
 
    #ifdef Parallel
    MPI_Request*    _globalWeightRequest;
    MPI_Request*    _lightestRankRequest;
    MPI_Request*    _minimumOfMaximumOfRankWeightsRequest;
    #endif
 
    double          _globalWeightIn;
    double          _globalWeightOut;
 
    ReductionBuffer _lightestRankIn;
    ReductionBuffer _lightestRankOut;
 
    double          _minimumOfMaximumOfRankWeightsIn;
    double          _minimumOfMaximumOfRankWeightsOut;
  private:
    static tarch::logging::Log _log;
};