FFmmAlgorithm.hpp 9.94 KB
Newer Older
1 2 3 4
#ifndef FFMMALGORITHM_HPP
#define FFMMALGORITHM_HPP
// /!\ Please, you must read the license at the bottom of this page

5
#include "../Utils/FGlobal.hpp"
6 7 8 9 10 11
#include "../Utils/FAssertable.hpp"
#include "../Utils/FDebug.hpp"
#include "../Utils/FTrace.hpp"
#include "../Utils/FTic.hpp"

#include "../Containers/FOctree.hpp"
12
#include "../Containers/FVector.hpp"
13 14 15 16 17 18 19 20 21 22 23 24 25


/**
* @author Berenger Bramas (berenger.bramas@inria.fr)
* @class FFmmAlgorithm
* @brief
* Please read the license
*
* This class is a basic FMM algorithm
* It just iterates on a tree and call the kernels with good arguments.
*
* Of course this class does not deallocate pointer given in arguements.
*/
berenger-bramas's avatar
berenger-bramas committed
26
template<class OctreeClass, class ParticleClass, class CellClass, class ContainerClass, class KernelClass, class LeafClass>
27 28
class FFmmAlgorithm : protected FAssertable{

berenger-bramas's avatar
berenger-bramas committed
29 30
    OctreeClass* const tree;       //< The octree to work on
    KernelClass* const kernels;    //< The kernels
31 32

    const int OctreeHeight;
33 34 35 36 37 38 39

public:	
    /** The constructor need the octree and the kernels used for computation
      * @param inTree the octree to work on
      * @param inKernels the kernels to call
      * An assert is launched if one of the arguments is null
      */
berenger-bramas's avatar
berenger-bramas committed
40
    FFmmAlgorithm(OctreeClass* const inTree, KernelClass* const inKernels)
41
                      : tree(inTree) , kernels(inKernels), OctreeHeight(tree->getHeight()) {
42

43 44
        fassert(tree, "tree cannot be null", __LINE__, __FILE__);
        fassert(kernels, "kernels cannot be null", __LINE__, __FILE__);
45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65

        FDEBUG(FDebug::Controller << "FFmmAlgorithm\n");
    }

    /** Default destructor */
    virtual ~FFmmAlgorithm(){
    }

    /**
      * To execute the fmm algorithm
      * Call this function to run the complete algorithm
      */
    void execute(){
        FTRACE( FTrace::Controller.enterFunction(FTrace::FMM, __FUNCTION__ , __FILE__ , __LINE__) );

        bottomPass();
        upwardPass();

        downardPass();

        directPass();
berenger-bramas's avatar
berenger-bramas committed
66

67 68 69
        FTRACE( FTrace::Controller.leaveFunction(FTrace::FMM) );
    }

berenger-bramas's avatar
berenger-bramas committed
70 71 72 73
    /////////////////////////////////////////////////////////////////////////////
    // P2M
    /////////////////////////////////////////////////////////////////////////////

74 75 76 77
    /** P2M */
    void bottomPass(){
        FTRACE( FTrace::Controller.enterFunction(FTrace::FMM, __FUNCTION__ , __FILE__ , __LINE__) );
        FDEBUG( FDebug::Controller.write("\tStart Bottom Pass\n").write(FDebug::Flush) );
berenger-bramas's avatar
berenger-bramas committed
78 79
        FDEBUG(FTic counterTime);
        FDEBUG(FTic computationCounter);
80

berenger-bramas's avatar
berenger-bramas committed
81
        typename OctreeClass::Iterator octreeIterator(tree);
82 83 84 85 86 87 88 89 90 91 92

        // Iterate on leafs
        octreeIterator.gotoBottomLeft();
        do{
            // We need the current cell that represent the leaf
            // and the list of particles
            FDEBUG(computationCounter.tic());
            kernels->P2M( octreeIterator.getCurrentCell() , octreeIterator.getCurrentListSrc());
            FDEBUG(computationCounter.tac());
        } while(octreeIterator.moveRight());

93
        FDEBUG( FDebug::Controller << "\tFinished (@Bottom Pass (P2M) = "  << counterTime.tacAndElapsed() << "s)\n" );
berenger-bramas's avatar
berenger-bramas committed
94
        FDEBUG( FDebug::Controller << "\t\t Computation : " << computationCounter.cumulated() << " s\n" );
95 96 97
        FTRACE( FTrace::Controller.leaveFunction(FTrace::FMM) );
    }

berenger-bramas's avatar
berenger-bramas committed
98 99 100 101
    /////////////////////////////////////////////////////////////////////////////
    // Upward
    /////////////////////////////////////////////////////////////////////////////

102 103 104 105
    /** M2M */
    void upwardPass(){
        FTRACE( FTrace::Controller.enterFunction(FTrace::FMM, __FUNCTION__ , __FILE__ , __LINE__) );
        FDEBUG( FDebug::Controller.write("\tStart Upward Pass\n").write(FDebug::Flush); );
berenger-bramas's avatar
berenger-bramas committed
106 107
        FDEBUG(FTic counterTime);
        FDEBUG(FTic computationCounter);
108 109

        // Start from leal level - 1
berenger-bramas's avatar
berenger-bramas committed
110
        typename OctreeClass::Iterator octreeIterator(tree);
111 112 113
        octreeIterator.gotoBottomLeft();
        octreeIterator.moveUp();

berenger-bramas's avatar
berenger-bramas committed
114
        typename OctreeClass::Iterator avoidGotoLeftIterator(octreeIterator);
115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130

        // for each levels
        for(int idxLevel = OctreeHeight - 2 ; idxLevel > 1 ; --idxLevel ){
            // for each cells
            do{
                // We need the current cell and the child
                // child is an array (of 8 child) that may be null
                FDEBUG(computationCounter.tic());
                kernels->M2M( octreeIterator.getCurrentCell() , octreeIterator.getCurrentChild(), idxLevel);
                FDEBUG(computationCounter.tac());
            } while(octreeIterator.moveRight());

            avoidGotoLeftIterator.moveUp();
            octreeIterator = avoidGotoLeftIterator;// equal octreeIterator.moveUp(); octreeIterator.gotoLeft();
        }

berenger-bramas's avatar
berenger-bramas committed
131

132
        FDEBUG( FDebug::Controller << "\tFinished (@Upward Pass (M2M) = "  << counterTime.tacAndElapsed() << "s)\n" );
berenger-bramas's avatar
berenger-bramas committed
133
        FDEBUG( FDebug::Controller << "\t\t Computation : " << computationCounter.cumulated() << " s\n" );
134 135 136
        FTRACE( FTrace::Controller.leaveFunction(FTrace::FMM) );
    }

berenger-bramas's avatar
berenger-bramas committed
137 138 139 140
    /////////////////////////////////////////////////////////////////////////////
    // Downward
    /////////////////////////////////////////////////////////////////////////////

141 142 143 144 145
    /** M2L L2L */
    void downardPass(){
        FTRACE( FTrace::Controller.enterFunction(FTrace::FMM, __FUNCTION__ , __FILE__ , __LINE__) );

        { // first M2L
berenger-bramas's avatar
berenger-bramas committed
146 147 148 149
            FDEBUG( FDebug::Controller.write("\tStart Downward Pass (M2L)\n").write(FDebug::Flush); );
            FDEBUG(FTic counterTime);
            FDEBUG(FTic computationCounter);

berenger-bramas's avatar
berenger-bramas committed
150
            typename OctreeClass::Iterator octreeIterator(tree);
151 152
            octreeIterator.moveDown();

berenger-bramas's avatar
berenger-bramas committed
153
            typename OctreeClass::Iterator avoidGotoLeftIterator(octreeIterator);
154

155
            const CellClass* neighbors[208];
156

157 158 159 160
            // for each levels
            for(int idxLevel = 2 ; idxLevel < OctreeHeight ; ++idxLevel ){
                // for each cells
                do{
161
                    const int counter = tree->getDistantNeighbors(neighbors, octreeIterator.getCurrentGlobalCoordinate(), idxLevel);
berenger-bramas's avatar
berenger-bramas committed
162
                    FDEBUG(computationCounter.tic());
163
                    if(counter) kernels->M2L( octreeIterator.getCurrentCell() , neighbors, counter, idxLevel);
164 165 166 167 168 169
                    FDEBUG(computationCounter.tac());
                } while(octreeIterator.moveRight());

                avoidGotoLeftIterator.moveDown();
                octreeIterator = avoidGotoLeftIterator;
            }
170
            FDEBUG( FDebug::Controller << "\tFinished (@Downward Pass (M2L) = "  << counterTime.tacAndElapsed() << "s)\n" );
berenger-bramas's avatar
berenger-bramas committed
171
            FDEBUG( FDebug::Controller << "\t\t Computation : " << computationCounter.cumulated() << " s\n" );
172
        }
berenger-bramas's avatar
berenger-bramas committed
173 174 175 176 177 178

        { // second L2L            
            FDEBUG( FDebug::Controller.write("\tStart Downward Pass (L2L)\n").write(FDebug::Flush); );
            FDEBUG(FTic counterTime);
            FDEBUG(FTic computationCounter );

berenger-bramas's avatar
berenger-bramas committed
179
            typename OctreeClass::Iterator octreeIterator(tree);
180 181
            octreeIterator.moveDown();

berenger-bramas's avatar
berenger-bramas committed
182
            typename OctreeClass::Iterator avoidGotoLeftIterator(octreeIterator);
183 184 185 186 187 188 189 190 191 192 193 194 195 196

            const int heightMinusOne = OctreeHeight - 1;
            // for each levels exepted leaf level
            for(int idxLevel = 2 ; idxLevel < heightMinusOne ; ++idxLevel ){
                // for each cells
                do{
                    FDEBUG(computationCounter.tic());
                    kernels->L2L( octreeIterator.getCurrentCell() , octreeIterator.getCurrentChild(), idxLevel);
                    FDEBUG(computationCounter.tac());
                } while(octreeIterator.moveRight());

                avoidGotoLeftIterator.moveDown();
                octreeIterator = avoidGotoLeftIterator;
            }
berenger-bramas's avatar
berenger-bramas committed
197

198
            FDEBUG( FDebug::Controller << "\tFinished (@Downward Pass (L2L) = "  << counterTime.tacAndElapsed() << "s)\n" );
berenger-bramas's avatar
berenger-bramas committed
199
            FDEBUG( FDebug::Controller << "\t\t Computation : " << computationCounter.cumulated() << " s\n" );
200 201 202 203 204
        }

        FTRACE( FTrace::Controller.leaveFunction(FTrace::FMM) );
    }

berenger-bramas's avatar
berenger-bramas committed
205 206 207 208
    /////////////////////////////////////////////////////////////////////////////
    // Direct
    /////////////////////////////////////////////////////////////////////////////

209 210 211 212
    /** P2P */
    void directPass(){
        FTRACE( FTrace::Controller.enterFunction(FTrace::FMM, __FUNCTION__ , __FILE__ , __LINE__) );
        FDEBUG( FDebug::Controller.write("\tStart Direct Pass\n").write(FDebug::Flush); );
berenger-bramas's avatar
berenger-bramas committed
213
        FDEBUG(FTic counterTime);
214 215
        FDEBUG(FTic computationCounterL2P);
        FDEBUG(FTic computationCounterP2P);
216 217 218

        const int heightMinusOne = OctreeHeight - 1;

berenger-bramas's avatar
berenger-bramas committed
219
        typename OctreeClass::Iterator octreeIterator(tree);
220 221
        octreeIterator.gotoBottomLeft();
        // There is a maximum of 26 neighbors
berenger-bramas's avatar
berenger-bramas committed
222
        ContainerClass* neighbors[26];
223
        MortonIndex neighborsIndex[26];
224 225
        // for each leafs
        do{
226
            FDEBUG(computationCounterL2P.tic());
227
            kernels->L2P(octreeIterator.getCurrentCell(), octreeIterator.getCurrentListTargets());
228
            FDEBUG(computationCounterL2P.tac());
229
            // need the current particles and neighbors particles
230
            const int counter = tree->getLeafsNeighborsWithIndex(neighbors, neighborsIndex, octreeIterator.getCurrentGlobalIndex(),heightMinusOne);
231
            FDEBUG(computationCounterP2P.tic());
232
            kernels->P2P(octreeIterator.getCurrentGlobalIndex(),octreeIterator.getCurrentListTargets(), octreeIterator.getCurrentListSrc() , neighbors, neighborsIndex, counter);
233
            FDEBUG(computationCounterP2P.tac());
234 235
        } while(octreeIterator.moveRight());

berenger-bramas's avatar
berenger-bramas committed
236

237 238 239
        FDEBUG( FDebug::Controller << "\tFinished (@Direct Pass (L2P + P2P) = "  << counterTime.tacAndElapsed() << "s)\n" );
        FDEBUG( FDebug::Controller << "\t\t Computation L2P : " << computationCounterL2P.cumulated() << " s\n" );
        FDEBUG( FDebug::Controller << "\t\t Computation P2P : " << computationCounterP2P.cumulated() << " s\n" );
240 241 242 243 244 245 246 247 248
        FTRACE( FTrace::Controller.leaveFunction(FTrace::FMM) );
    }

};


#endif //FFMMALGORITHM_HPP

// [--LICENSE--]