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tstFBM.C

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00001 
00002 #include "mpi.h"
00003 #include "petsc.h"
00004 #include "sys.h"
00005 #include "TreeNode.h"
00006 #include "parUtils.h"
00007 #include "omg.h"
00008 #include "oda.h"
00009 #include "omgJac.h"
00010 #include "handleStencils.h"
00011 #include <cstdlib>
00012 #include "colors.h"
00013 #include "externVars.h"
00014 #include "dendro.h"
00015 
00016 static char help[] = "FBM";
00017 
00018 //Don't want time to be synchronized. Need to check load imbalance.
00019 #ifdef MPI_WTIME_IS_GLOBAL
00020 #undef MPI_WTIME_IS_GLOBAL
00021 #endif
00022 
00023 #ifdef PETSC_USE_LOG
00024 //user-defined variables
00025 int Jac1DiagEvent;
00026 int Jac1MultEvent;
00027 int Jac1FinestDiagEvent;
00028 int Jac1FinestMultEvent;
00029 
00030 int Jac2DiagEvent;
00031 int Jac2MultEvent;
00032 int Jac2FinestDiagEvent;
00033 int Jac2FinestMultEvent;
00034 
00035 int Jac3DiagEvent;
00036 int Jac3MultEvent;
00037 int Jac3FinestDiagEvent;
00038 int Jac3FinestMultEvent;
00039 #endif
00040 
00041 double***** LaplacianType1Stencil; 
00042 double**** LaplacianType2Stencil; 
00043 double***** MassType1Stencil; 
00044 double**** MassType2Stencil; 
00045 double****** ShapeFnStencil;
00046 
00047 int main(int argc, char ** argv ) {     
00048   int npes, rank;
00049   unsigned int maxNumPts= 1;
00050   unsigned int dim=3;
00051   unsigned int maxDepth=30;
00052   bool compressLut=false;
00053   double mgLoadFac = 2.0;
00054   bool incCorner = 1;  
00055 
00056   PetscInitialize(&argc,&argv,"optionsFBM",help);
00057   ot::RegisterEvents();
00058 
00059   ot::DAMG_Initialize(MPI_COMM_WORLD);
00060 
00061   MPI_Comm_size(MPI_COMM_WORLD,&npes);
00062   MPI_Comm_rank(MPI_COMM_WORLD,&rank);
00063 
00064   char pFile[256];
00065   sprintf(pFile, "fbmInp%d_%d.pts",rank, npes);
00066 
00067   std::vector<double> pts;
00068   ot::readPtsFromFile(pFile, pts);
00069 
00070   double gSize[3];
00071   gSize[0] = 1.0;
00072   gSize[1] = 1.0;
00073   gSize[2] = 1.0;
00074 
00075   //Construction
00076   std::vector<ot::TreeNode> linOct;
00077   ot::points2Octree(pts, gSize, linOct, dim, maxDepth, maxNumPts, MPI_COMM_WORLD);
00078   pts.clear();
00079 
00080   //Balancing...
00081   std::vector<ot::TreeNode> balOct;
00082   ot::balanceOctree(linOct, balOct, dim, maxDepth, incCorner, MPI_COMM_WORLD, NULL, NULL);
00083   linOct.clear();
00084 
00085   PetscInt       numRefinements = 0;
00086 
00087   PetscOptionsGetInt(0,"-numRefinements",&numRefinements,0);
00088   for(int i = 0; i < numRefinements; i++) {
00089     std::vector<ot::TreeNode> tmpOct = balOct;
00090     balOct.clear();
00091     ot::refineOctree(tmpOct, balOct); 
00092   }
00093 
00094   //Solve ...
00095 
00096   ot::DAMG        *damg;    
00097   int       nlevels = 1; //number of multigrid levels
00098   unsigned int       dof =1;// degrees of freedom per node  
00099 
00100   PetscInt nlevelsPetscInt = nlevels;
00101   PetscOptionsGetInt(0, "-nlevels", &nlevelsPetscInt, 0);
00102   nlevels = nlevelsPetscInt;
00103 
00104   if(!rank) {
00105     std::cout<<"nlevels initial: "<<nlevels<<std::endl;
00106   }
00107 
00108   MPI_Barrier(MPI_COMM_WORLD);
00109   double setupStartTime = MPI_Wtime();
00110 
00111   // Note: The user context for all levels will be set separately later.
00112   ot::DAMGCreateAndSetDA(PETSC_COMM_WORLD, nlevels, NULL, &damg,
00113       balOct, dof, mgLoadFac, compressLut, incCorner);
00114 
00115   MPI_Barrier(MPI_COMM_WORLD);
00116   double setupEndTime = MPI_Wtime();
00117 
00118   if(!rank) {
00119     std::cout<<"nlevels final: "<<nlevels<<std::endl;
00120   }
00121 
00122   if(!rank) {
00123     std::cout << "Created DA for all levels."<< std::endl;
00124   }
00125 
00126   ot::PrintDAMG(damg);
00127 
00128   createLmatType2(LaplacianType2Stencil);
00129   createMmatType2(MassType2Stencil);
00130   createShFnMat(ShapeFnStencil);
00131 
00132   ot::DAMGCreateSuppressedDOFs(damg);
00133 
00134   SetDirichletJacContexts(damg);
00135 
00136   //Global Function Handles for using KSP_Shell (will be used @ the coarsest grid if not all
00137   //processors are active on the coarsest grid)
00138   ot::getPrivateMatricesForKSP_Shell = getPrivateMatricesForKSP_Shell_DirichletJac;
00139 
00140   ot::DAMGSetKSP(damg, CreateDirichletJacobian, ComputeDirichletJacobian, ComputeFBM_RHS);
00141 
00142   MPI_Barrier(MPI_COMM_WORLD);
00143   double solveStartTime = MPI_Wtime();
00144 
00145   ot::DAMGSolve(damg);
00146 
00147   MPI_Barrier(MPI_COMM_WORLD);
00148   double solveEndTime = MPI_Wtime();
00149 
00150   Vec solTrue;
00151   VecDuplicate(DAMGGetx(damg), &solTrue);
00152   SetSolutionFBM(damg[nlevels - 1], solTrue);
00153   EnforceZeroFBM(damg[nlevels - 1], DAMGGetx(damg));
00154 
00155   VecAXPY(solTrue, -1.0, DAMGGetx(damg));
00156 
00157   PetscReal maxNormErr;
00158   VecNorm(solTrue, NORM_INFINITY, &maxNormErr);
00159 
00160   VecDestroy(solTrue);
00161 
00162   if(!rank) {
00163     std::cout<<" Total Setup Time: "<<(setupEndTime - setupStartTime)<<std::endl;
00164     std::cout<<" Total Solve Time: "<<(solveEndTime - solveStartTime)<<std::endl;
00165     std::cout<<" maxNormErr (Pointwise): "<<maxNormErr<<std::endl;
00166   }
00167 
00168   destroyLmatType2(LaplacianType2Stencil);
00169   destroyMmatType2(MassType2Stencil);
00170   destroyShFnMat(ShapeFnStencil);
00171 
00172   DestroyDirichletJacContexts(damg);
00173 
00174   DAMGDestroy(damg);
00175 
00176   balOct.clear();
00177 
00178   ot::DAMG_Finalize();
00179 
00180   PetscFinalize();
00181 }//end function
00182 

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