testCompareKernels.cpp 13.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291
// ===================================================================================
// Copyright ScalFmm 2016 INRIA, Olivier Coulaud, Bérenger Bramas,
// Matthias Messner olivier.coulaud@inria.fr, berenger.bramas@inria.fr
// This software is a computer program whose purpose is to compute the
// FMM.
//
// This software is governed by the CeCILL-C and LGPL licenses and
// abiding by the rules of distribution of free software.
// An extension to the license is given to allow static linking of scalfmm
// inside a proprietary application (no matter its license).
// See the main license file for more details.
//
// 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 General Public and CeCILL-C Licenses for more details.
// "http://www.cecill.info".
// "http://www.gnu.org/licenses".
// ===================================================================================

// ==== CMAKE =====
// @FUSE_BLAS
// ================
// Keep in private GIT
// @SCALFMM_PRIVATE


#include <iostream>

#include <cstdio>
#include <cstdlib>

#include "../../Src/Utils/FTic.hpp"
#include "../../Src/Utils/FParameters.hpp"

#include "../../Src/Files/FFmaGenericLoader.hpp"

#include "../../Src/Containers/FOctree.hpp"
#include "../../Src/Containers/FVector.hpp"

#include "../../Src/Core/FFmmAlgorithm.hpp"
#include "../../Src/Core/FFmmAlgorithmThread.hpp"

// chebyshev kernel

#include "../../Src/Kernels/Chebyshev/FChebCell.hpp"
#include "../../Src/Kernels/Interpolation/FInterpMatrixKernel.hpp"
#include "../../Src/Kernels/Chebyshev/FChebKernel.hpp"
#include "../../Src/Kernels/Chebyshev/FChebSymKernel.hpp"

// spherical kernel
#include "../../Src/Kernels/Spherical/FSphericalKernel.hpp"
#include "../../Src/Kernels/Spherical/FSphericalBlasKernel.hpp"
#include "../../Src/Kernels/Spherical/FSphericalBlockBlasKernel.hpp"
#include "../../Src/Kernels/Spherical/FSphericalRotationKernel.hpp"
#include "../../Src/Kernels/Spherical/FSphericalCell.hpp"

#include "../../Src/Components/FSimpleLeaf.hpp"
#include "../../Src/Kernels/P2P/FP2PParticleContainerIndexed.hpp"

#include "../../Src/Utils/FParameterNames.hpp"

/**
 * This program compares two different kernels, eg., the Chebyshev kernel with
 * the SphericalBlas kernel.
 */


// Simply create particles and try the kernels
int main(int argc, char* argv[])
{
    FHelpDescribeAndExit(argc, argv,
                         "Compare lots of kernels.",
                         FParameterDefinitions::InputFile, FParameterDefinitions::OctreeHeight,
                         FParameterDefinitions::OctreeSubHeight, FParameterDefinitions::NbThreads,
                         FParameterDefinitions::SHDevelopment);

    // get info from commandline
    const char* const filename       = FParameters::getStr(argc,argv,FParameterDefinitions::InputFile.options, "../Data/test20k.fma");
    const unsigned int TreeHeight    = FParameters::getValue(argc, argv, FParameterDefinitions::OctreeHeight.options, 5);
    const unsigned int SubTreeHeight = FParameters::getValue(argc, argv, FParameterDefinitions::OctreeSubHeight.options, 2);
    const unsigned int NbThreads     = FParameters::getValue(argc, argv, FParameterDefinitions::NbThreads.options, omp_get_max_threads());

    omp_set_num_threads(NbThreads);

    std::cout << "\n>> Using " << omp_get_max_threads() << " threads.\n" << std::endl;

    // init timer
    FTic time;

    // interaction kernel evaluator
    typedef double FReal;
    typedef FInterpMatrixKernelR<FReal> MatrixKernelClass;
    const MatrixKernelClass MatrixKernel;

    struct TestParticle{
        FPoint<FReal> position;
        FReal forces[3];
        FReal physicalValue;
        FReal potential;
    };
    // open particle file
    FFmaGenericLoader<FReal> loader(filename);
    if(!loader.isOpen()) throw std::runtime_error("Particle file couldn't be opened!");

    TestParticle* const particles = new TestParticle[loader.getNumberOfParticles()];
    for(FSize idxPart = 0 ; idxPart < loader.getNumberOfParticles() ; ++idxPart){
        FPoint<FReal> position;
        FReal physicalValue = 0.0;
        loader.fillParticle(&position,&physicalValue);
        // get copy
        particles[idxPart].position = position;
        particles[idxPart].physicalValue = physicalValue;
        particles[idxPart].potential = 0.0;
        particles[idxPart].forces[0] = 0.0;
        particles[idxPart].forces[1] = 0.0;
        particles[idxPart].forces[2] = 0.0;
    }
    {
        for(FSize idxTarget = 0 ; idxTarget < loader.getNumberOfParticles() ; ++idxTarget){
            for(FSize idxOther =  idxTarget + 1 ; idxOther < loader.getNumberOfParticles() ; ++idxOther){
                FP2P::MutualParticles(particles[idxTarget].position.getX(), particles[idxTarget].position.getY(),
                                      particles[idxTarget].position.getZ(),particles[idxTarget].physicalValue,
                                      &particles[idxTarget].forces[0],&particles[idxTarget].forces[1],
                                      &particles[idxTarget].forces[2],&particles[idxTarget].potential,
                                particles[idxOther].position.getX(), particles[idxOther].position.getY(),
                                particles[idxOther].position.getZ(),particles[idxOther].physicalValue,
                                &particles[idxOther].forces[0],&particles[idxOther].forces[1],
                                      &particles[idxOther].forces[2],&particles[idxOther].potential,&MatrixKernel);
            }
        }
    }

    ////////////////////////////////////////////////////////////////////
    {	// begin Chebyshev kernel

        // accuracy
        const unsigned int ORDER = 7;
        const FReal epsilon = FReal(1e-7);

        // typedefs
        typedef FP2PParticleContainerIndexed<FReal> ContainerClass;
        typedef FSimpleLeaf<FReal, ContainerClass> LeafClass;
        typedef FChebCell<FReal,ORDER> CellClass;
        typedef FOctree<FReal, CellClass,ContainerClass,LeafClass> OctreeClass;

        //typedef FChebKernel<FReal,CellClass,ContainerClass,MatrixKernelClass,ORDER> KernelClass;
        typedef FChebSymKernel<FReal,CellClass,ContainerClass,MatrixKernelClass,ORDER> KernelClass;
        //typedef FFmmAlgorithm<OctreeClass,CellClass,ContainerClass,KernelClass,LeafClass> FmmClass;
        typedef FFmmAlgorithmThread<OctreeClass,CellClass,ContainerClass,KernelClass,LeafClass> FmmClass;


        // init oct-tree
        OctreeClass tree(TreeHeight, SubTreeHeight, loader.getBoxWidth(), loader.getCenterOfBox());

        { // -----------------------------------------------------
            std::cout << "Creating & Inserting " << loader.getNumberOfParticles()
                      << " particles ..." << std::endl;
            std::cout << "\tHeight : " << TreeHeight << " \t sub-height : " << SubTreeHeight << std::endl;
            time.tic();

            for(FSize idxPart = 0 ; idxPart < loader.getNumberOfParticles() ; ++idxPart){
                // put in tree
                tree.insert(particles[idxPart].position, idxPart, particles[idxPart].physicalValue);
            }

            time.tac();
            std::cout << "Done  " << "(@Creating and Inserting Particles = "
                      << time.elapsed() << "s)." << std::endl;
        } // -----------------------------------------------------

        { // -----------------------------------------------------
            std::cout << "\nChebyshev FMM ... " << std::endl;
            time.tic();
            KernelClass kernels(TreeHeight, loader.getBoxWidth(), loader.getCenterOfBox(), &MatrixKernel, epsilon);
            FmmClass algorithm(&tree, &kernels);
            algorithm.execute();
            time.tac();
            std::cout << "Done  " << "(@Algorithm = " << time.elapsed() << "s)." << std::endl;
        } // -----------------------------------------------------

        FMath::FAccurater<FReal> potentialDiff;
        FMath::FAccurater<FReal> fx, fy, fz;
        { // Check that each particle has been summed with all other

            tree.forEachLeaf([&](LeafClass* leaf){
                const FReal*const potentials = leaf->getTargets()->getPotentials();
                const FReal*const forcesX = leaf->getTargets()->getForcesX();
                const FReal*const forcesY = leaf->getTargets()->getForcesY();
                const FReal*const forcesZ = leaf->getTargets()->getForcesZ();
                const FSize nbParticlesInLeaf = leaf->getTargets()->getNbParticles();
                const FVector<FSize>& indexes = leaf->getTargets()->getIndexes();

                for(FSize idxPart = 0 ; idxPart < nbParticlesInLeaf ; ++idxPart){
                    const FSize indexPartOrig = indexes[idxPart];
                    potentialDiff.add(particles[indexPartOrig].potential,potentials[idxPart]);
                    fx.add(particles[indexPartOrig].forces[0],forcesX[idxPart]);
                    fy.add(particles[indexPartOrig].forces[1],forcesY[idxPart]);
                    fz.add(particles[indexPartOrig].forces[2],forcesZ[idxPart]);
                }
            });
        }

        // Print for information
        std::cout << "Potential " << potentialDiff << std::endl;
        std::cout << "Fx " << fx << std::endl;
        std::cout << "Fy " << fy << std::endl;
        std::cout << "Fz " << fz << std::endl;

    } // end Chebyshev kernel


    ////////////////////////////////////////////////////////////////////
    {	// begin FFmaBlas kernel

        // accuracy
        const int DevP = FParameters::getValue(argc, argv, FParameterDefinitions::SHDevelopment.options, 11);

        // typedefs
        typedef FSphericalCell<FReal>                 CellClass;
        typedef FP2PParticleContainerIndexed<FReal>         ContainerClass;
        typedef FSimpleLeaf<FReal, ContainerClass >                     LeafClass;
        typedef FOctree<FReal, CellClass, ContainerClass , LeafClass >  OctreeClass;
          typedef FSphericalBlockBlasKernel<FReal, CellClass, ContainerClass > KernelClass;
         typedef FFmmAlgorithmThread<OctreeClass, CellClass, ContainerClass, KernelClass, LeafClass > FmmClass;

        // init cell class and oct-tree
        CellClass::Init(DevP, true); // only for blas
        //
        OctreeClass tree(TreeHeight, SubTreeHeight, loader.getBoxWidth(), loader.getCenterOfBox());

        { // -----------------------------------------------------
            std::cout << "Creating & Inserting " << loader.getNumberOfParticles()
                      << " particles ..." << std::endl;
            std::cout << "\tHeight : " << TreeHeight << " \t sub-height : "
                      << SubTreeHeight << std::endl;
            time.tic();

            for(FSize idxPart = 0 ; idxPart < loader.getNumberOfParticles() ; ++idxPart){
                // put in tree
                tree.insert(particles[idxPart].position, idxPart, particles[idxPart].physicalValue);
            }

            time.tac();
            std::cout << "Done  " << "(@Creating and Inserting Particles = "
                      << time.elapsed() << "s)." << std::endl;
        } // -----------------------------------------------------

        // -----------------------------------------------------
        std::cout << "\nFFmaBlas FMM ..." << std::endl;
        time.tic();
        KernelClass kernels(DevP, TreeHeight, loader.getBoxWidth(), loader.getCenterOfBox());
        FmmClass algorithm(&tree, &kernels);
        algorithm.execute();
        time.tac();
        std::cout << "Done  " << "(@Algorithm = " << time.elapsed() << "s)." << std::endl;
        // -----------------------------------------------------

        FMath::FAccurater<FReal> potentialDiff;
        FMath::FAccurater<FReal> fx, fy, fz;
        { // Check that each particle has been summed with all other

            tree.forEachLeaf([&](LeafClass* leaf){
                const FReal*const potentials = leaf->getTargets()->getPotentials();
                const FReal*const forcesX = leaf->getTargets()->getForcesX();
                const FReal*const forcesY = leaf->getTargets()->getForcesY();
                const FReal*const forcesZ = leaf->getTargets()->getForcesZ();
                const FSize nbParticlesInLeaf = leaf->getTargets()->getNbParticles();
                const FVector<FSize>& indexes = leaf->getTargets()->getIndexes();

                for(FSize idxPart = 0 ; idxPart < nbParticlesInLeaf ; ++idxPart){
                    const FSize indexPartOrig = indexes[idxPart];
                    potentialDiff.add(particles[indexPartOrig].potential,potentials[idxPart]);
                    fx.add(particles[indexPartOrig].forces[0],forcesX[idxPart]);
                    fy.add(particles[indexPartOrig].forces[1],forcesY[idxPart]);
                    fz.add(particles[indexPartOrig].forces[2],forcesZ[idxPart]);
                }
            });
        }

        // Print for information
        std::cout << "Potential " << potentialDiff << std::endl;
        std::cout << "Fx " << fx << std::endl;
        std::cout << "Fy " << fy << std::endl;
        std::cout << "Fz " << fz << std::endl;
    } // end FFmaBlas kernel

    delete[] particles;

    return 0;
}