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tstDirichlet.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   std::vector<ot::TreeNode> balOct;
00065   if(argc > 1) {
00066 
00067     char pFile[256];
00068     sprintf(pFile, "%s%d_%d.pts", argv[1], rank, npes);
00069 
00070     std::vector<double> pts;
00071     ot::readPtsFromFile(pFile, pts);
00072 
00073     double gSize[3];
00074     gSize[0] = 1.0;
00075     gSize[1] = 1.0;
00076     gSize[2] = 1.0;
00077 
00078     std::vector<ot::TreeNode> linOct;
00079     ot::points2Octree(pts, gSize, linOct, dim, maxDepth, maxNumPts, MPI_COMM_WORLD);
00080     pts.clear();
00081 
00082     ot::balanceOctree(linOct, balOct, dim, maxDepth, incCorner, MPI_COMM_WORLD, NULL, NULL);
00083     linOct.clear();
00084 
00085   } else {
00086 
00087     PetscInt regLev = 4;
00088     PetscOptionsGetInt(0, "-regLev", &regLev, 0);
00089     createRegularOctree(balOct, regLev, dim, maxDepth, MPI_COMM_WORLD);
00090 
00091   }
00092 
00093   PetscInt       numRefinements = 0;
00094 
00095   PetscOptionsGetInt(0,"-numRefinements",&numRefinements,0);
00096   for(int i = 0; i < numRefinements; i++) {
00097     std::vector<ot::TreeNode> tmpOct = balOct;
00098     balOct.clear();
00099     ot::refineOctree(tmpOct, balOct); 
00100   }
00101 
00102   //Solve ...
00103 
00104   ot::DAMG        *damg;    
00105   int       nlevels = 1; //number of multigrid levels
00106   unsigned int       dof =1;// degrees of freedom per node  
00107 
00108   PetscInt nlevelsPetscInt = nlevels;
00109   PetscOptionsGetInt(0, "-nlevels", &nlevelsPetscInt, 0);
00110   nlevels = nlevelsPetscInt;
00111 
00112   if(!rank) {
00113     std::cout<<"nlevels initial: "<<nlevels<<std::endl;
00114   }
00115 
00116   MPI_Barrier(MPI_COMM_WORLD);
00117   double setupStartTime = MPI_Wtime();
00118 
00119   // Note: The user context for all levels will be set separately later.
00120   ot::DAMGCreateAndSetDA(PETSC_COMM_WORLD, nlevels, NULL, &damg,
00121       balOct, dof, mgLoadFac, compressLut, incCorner);
00122 
00123   MPI_Barrier(MPI_COMM_WORLD);
00124   double setupEndTime = MPI_Wtime();
00125 
00126   if(!rank) {
00127     std::cout<<"nlevels final: "<<nlevels<<std::endl;
00128   }
00129 
00130   if(!rank) {
00131     std::cout << "Created DA for all levels."<< std::endl;
00132   }
00133 
00134   ot::PrintDAMG(damg);
00135 
00136   createLmatType2(LaplacianType2Stencil);
00137   createMmatType2(MassType2Stencil);
00138   createShFnMat(ShapeFnStencil);
00139 
00140   ot::DAMGCreateSuppressedDOFs(damg);
00141 
00142   SetDirichletJacContexts(damg);
00143 
00144   //Global Function Handles for using KSP_Shell (will be used @ the coarsest grid if not all
00145   //processors are active on the coarsest grid)
00146   ot::getPrivateMatricesForKSP_Shell = getPrivateMatricesForKSP_Shell_DirichletJac;
00147 
00148   ot::DAMGSetKSP(damg, CreateDirichletJacobian, ComputeDirichletJacobian, ComputeTestFBM_RHS);
00149 
00150   MPI_Barrier(MPI_COMM_WORLD);
00151   double solveStartTime = MPI_Wtime();
00152 
00153   ot::DAMGSolve(damg);
00154 
00155   MPI_Barrier(MPI_COMM_WORLD);
00156   double solveEndTime = MPI_Wtime();
00157 
00158   Vec solTrue;
00159   VecDuplicate(DAMGGetx(damg), &solTrue);
00160   SetSolutionFBM(damg[nlevels - 1], solTrue);
00161   EnforceZeroFBM(damg[nlevels - 1], DAMGGetx(damg));
00162 
00163   VecAXPY(solTrue, -1.0, DAMGGetx(damg));
00164 
00165   PetscReal maxNormErr;
00166   VecNorm(solTrue, NORM_INFINITY, &maxNormErr);
00167 
00168   VecDestroy(solTrue);
00169 
00170   if(!rank) {
00171     std::cout<<" Total Setup Time: "<<(setupEndTime - setupStartTime)<<std::endl;
00172     std::cout<<" Total Solve Time: "<<(solveEndTime - solveStartTime)<<std::endl;
00173     std::cout<<" maxNormErr (Pointwise): "<<maxNormErr<<std::endl;
00174   }
00175 
00176   destroyLmatType2(LaplacianType2Stencil);
00177   destroyMmatType2(MassType2Stencil);
00178   destroyShFnMat(ShapeFnStencil);
00179 
00180   DestroyDirichletJacContexts(damg);
00181 
00182   DAMGDestroy(damg);
00183 
00184   balOct.clear();
00185 
00186   ot::DAMG_Finalize();
00187 
00188   PetscFinalize();
00189 }//end function
00190 

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