4.1.8.2.4 : La fonction principale du programme
Maintenant, implémentons la fonctions principale :
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int main(int argc, char** argv){ |
On créé notre parseur d'argument avec la fonction createOptionParser définie plus tôt :
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OptionParser parser = createOptionParser();
parser.parseArgument(argc, argv);
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On récupère les arguments qui ont été passés au programme (les valeurs par défauts sont gérées automatiquement) :
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const OptionMode & defaultMode = parser.getDefaultMode(); float killRate(0.062f), feedRate(0.03f), dt(1.0f); size_t nbImage(100lu), nbRow(1080lu), nbCol(1920lu), nbExtraStep(1lu); defaultMode.getValue(killRate, "killrate"); defaultMode.getValue(feedRate, "feedrate"); defaultMode.getValue(nbImage, "nbimage"); defaultMode.getValue(nbExtraStep, "nbextrastep"); defaultMode.getValue(nbRow, "nbrow"); defaultMode.getValue(nbCol, "nbcol"); defaultMode.getValue(dt, "deltat"); std::string outputFile(""); defaultMode.getValue(outputFile, "output"); |
On appelle notre fonction générale :
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bool b(simulateImage(nbRow, nbCol, nbImage, nbExtraStep, killRate, feedRate, dt, outputFile));
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On retourne 0 en cas de succès et -1 en cas d'erreur :
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return b - 1; |
On finit la fonction principale :
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} |
Le fichier main_stupid.cpp complet :
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/*************************************** Auteur : Pierre Aubert Mail : pierre.aubert@lapp.in2p3.fr Licence : CeCILL-C ****************************************/ #include "OptionParser.h" #include "temporary_alloc.h" #include "asterics_cuda.h" #include "gray_scott_cuda.h" #include "MatrixHdf5.h" ///Create the OptionParser of this program /** @return OptionParser of this program */ OptionParser createOptionParser(){ OptionParser parser(true, __PROGRAM_VERSION__); parser.setExampleLongOption("gray_scott_gpu_cuda --killrate=0.062 --feedrate=0.03 --nbimage=100 --nbrow=1080 --nbcol=1920 --output=outputFile.hdf5"); parser.setExampleShortOption("gray_scott_gpu_cuda -k 0.062 -f 0.03 -n 100 -r 1080 -c 1920 -o outputFile.hdf5"); float killRate(0.054f), feedRate(0.014f); size_t nbImage(100lu), nbRow(100lu), nbCol(200lu); parser.addOption("killrate", "k", killRate, "rate of the process which converts V into P"); parser.addOption("feedrate", "f", feedRate, "rate of the process which feeds U and drains U, V and P"); parser.addOption("nbimage", "n", nbImage, "number of images to be created"); size_t nbExtraStep(1lu); parser.addOption("nbextrastep", "e", nbExtraStep, "number of extra steps to be computed between images"); parser.addOption("nbrow", "r", nbRow, "number of rows of the images to be created"); parser.addOption("nbcol", "c", nbCol, "number of columns of the images to be created"); float dt(1.0f); parser.addOption("deltat", "t", dt, "time interval between two computation"); std::string defaultOutputFile("output.h5"); parser.addOption("output", "o", defaultOutputFile, "Output file to be created with results"); return parser; } ///Simulate the images /** @param nbRow : number of rows of the images to be created * @param nbCol : number of columns of the images to be created * @param nbImage : number of images to be created * @param nbExtraStep : number of extra steps to be computed between images * @param killRate : rate of the process which converts V into P * @param feedRate : rate of the process which feeds U and drains U, V and P * @param dt : time interval between two computation * @param outputFile : name of the file to be created * @return true on succsess, false otherwise */ bool simulateImage(size_t nbRow, size_t nbCol, size_t nbImage, size_t nbExtraStep, float killRate, float feedRate, float dt, const std::string & outputFile){ #ifdef SELECTED_GPU int deviceId = asterics_setDevice(SELECTED_GPU); #else int deviceId(0); #endif int deviceCount(asterics_getNbCudaDevice()); size_t maxNbThreadPerBlockX(0), maxNbBlockX(0), totalGpuMemory(0); asterics_getGpuInfoMem(maxNbThreadPerBlockX, maxNbBlockX, totalGpuMemory, deviceId); std::cout << "simulateImage : found " << deviceCount << " device(s)" << std::endl; std::cout << "simulateImage : nbRow = " << nbRow << ", nbCol = " << nbCol << std::endl; MatrixHdf5 fullMat; fullMat.setAllDim(nbCol, nbRow); fullMat.resize(nbImage); size_t paddedNbRow(nbRow + 2l), paddedNbCol(nbCol + 2l); PTensor<float> tmpInU, tmpInV, tmpOutU, tmpOutV; float *tmpU1 = NULL, *tmpU2 = NULL, *tmpV1 = NULL, *tmpV2 = NULL; allocate_temporary(tmpU1, tmpU2, tmpV1, tmpV2, tmpInU, tmpInV, tmpOutU, tmpOutV, paddedNbRow, paddedNbCol); long nbStencilRow(3l), nbStencilCol(3l); float diffusionRateU(0.1f), diffusionRateV(0.05f); //This matrix of neigbour exchange is quite accurate but gives not so fun results // float matDeltaSquare[] = {0.05f, 0.2f, 0.05f, // 0.2f, 0.0f, 0.2f, // 0.05f, 0.2f, 0.05f}; float matDeltaSquare[] = {1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f}; float * matOutV = fullMat.getTabMatFull(); gray_scott_cuda_stupid(matOutV, tmpU1, tmpV1, nbImage, nbExtraStep, nbRow, nbCol, paddedNbRow, paddedNbCol, matDeltaSquare, nbStencilRow, nbStencilCol, diffusionRateU, diffusionRateV, feedRate, killRate, dt, maxNbThreadPerBlockX, maxNbBlockX, totalGpuMemory); std::cerr << "Done" << std::endl; //Let's save the output file fullMat.write(outputFile); return true; } int main(int argc, char** argv){ OptionParser parser = createOptionParser(); parser.parseArgument(argc, argv); const OptionMode & defaultMode = parser.getDefaultMode(); float killRate(0.062f), feedRate(0.03f), dt(1.0f); size_t nbImage(100lu), nbRow(1080lu), nbCol(1920lu), nbExtraStep(1lu); defaultMode.getValue(killRate, "killrate"); defaultMode.getValue(feedRate, "feedrate"); defaultMode.getValue(nbImage, "nbimage"); defaultMode.getValue(nbExtraStep, "nbextrastep"); defaultMode.getValue(nbRow, "nbrow"); defaultMode.getValue(nbCol, "nbcol"); defaultMode.getValue(dt, "deltat"); std::string outputFile(""); defaultMode.getValue(outputFile, "output"); bool b(simulateImage(nbRow, nbCol, nbImage, nbExtraStep, killRate, feedRate, dt, outputFile)); return b - 1; } |
Vous pouvez le télécharger ici.