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OverlapDEC: bug fix. Bounding box adjustment was negative.
authorabn <adrien.bruneton@cea.fr>
Tue, 24 Nov 2015 15:09:40 +0000 (16:09 +0100)
committerabn <adrien.bruneton@cea.fr>
Tue, 24 Nov 2015 15:09:40 +0000 (16:09 +0100)
Also: documentation + typedefs to make code easier to read.
To come: more tests + new algo for job distribution.

17 files changed:
src/MEDCoupling/MEDCouplingField.cxx
src/MEDCoupling/MEDCouplingMemArray.cxx
src/MEDCoupling/MEDCouplingMemArray.hxx
src/MEDCoupling/MEDCouplingRemapper.cxx
src/ParaMEDMEM/ElementLocator.cxx
src/ParaMEDMEM/OverlapDEC.cxx
src/ParaMEDMEM/OverlapDEC.hxx
src/ParaMEDMEM/OverlapElementLocator.cxx
src/ParaMEDMEM/OverlapElementLocator.hxx
src/ParaMEDMEM/OverlapInterpolationMatrix.cxx
src/ParaMEDMEM/OverlapInterpolationMatrix.hxx
src/ParaMEDMEM/OverlapMapping.cxx
src/ParaMEDMEM/OverlapMapping.hxx
src/ParaMEDMEMTest/CMakeLists.txt
src/ParaMEDMEMTest/ParaMEDMEMTest.hxx
src/ParaMEDMEMTest/ParaMEDMEMTest_Gauthier1.cxx
src/ParaMEDMEMTest/ParaMEDMEMTest_OverlapDEC.cxx

index 463a44bbb95f56a63be75b0d4dd1bd508995f948..cb69a6de775153fa6c6e57919bbbbaf75756bb23 100644 (file)
@@ -503,7 +503,7 @@ MEDCouplingField::MEDCouplingField(const MEDCouplingField& other, bool deepCopy)
 
 /*!
  * Returns a new MEDCouplingMesh constituted by some cells of the underlying mesh of \a
- * this filed, and returns ids of entities (nodes, cells, Gauss points) lying on the 
+ * this field, and returns ids of entities (nodes, cells, Gauss points) lying on the
  * specified cells. The cells to include to the result mesh are specified by an array of
  * cell ids. The new mesh shares the coordinates array with the underlying mesh. 
  *  \param [in] start - an array of cell ids to include to the result mesh.
index 75174128369c75e8f11e8592da42d54dba05853c..998ac654e7c4e5797cf134765d6f0ae29cd9d48c 100644 (file)
@@ -1628,6 +1628,11 @@ DataArrayDouble *DataArrayDouble::selectByTupleId(const int *new2OldBg, const in
   return ret.retn();
 }
 
+DataArrayDouble *DataArrayDouble::selectByTupleId(const DataArrayInt & di) const
+{
+  return selectByTupleId(di.getConstPointer(), di.getConstPointer()+di.getNumberOfTuples());
+}
+
 /*!
  * Returns a shorten and permuted copy of \a this array. The new DataArrayDouble is
  * of size \a new2OldEnd - \a new2OldBg and it's values are permuted as required by
index 1fc39204c7441939393795170fdd4ecdf662ed35..201b7601e96abd7bb6cdf57550b3474fe465a047 100644 (file)
@@ -253,6 +253,7 @@ namespace ParaMEDMEM
     MEDCOUPLING_EXPORT DataArrayDouble *renumberR(const int *new2Old) const;
     MEDCOUPLING_EXPORT DataArrayDouble *renumberAndReduce(const int *old2New, int newNbOfTuple) const;
     MEDCOUPLING_EXPORT DataArrayDouble *selectByTupleId(const int *new2OldBg, const int *new2OldEnd) const;
+    MEDCOUPLING_EXPORT DataArrayDouble *selectByTupleId(const DataArrayInt & di) const;
     MEDCOUPLING_EXPORT DataArrayDouble *selectByTupleIdSafe(const int *new2OldBg, const int *new2OldEnd) const;
     MEDCOUPLING_EXPORT DataArrayDouble *selectByTupleId2(int bg, int end2, int step) const;
     MEDCOUPLING_EXPORT DataArray *selectByTupleRanges(const std::vector<std::pair<int,int> >& ranges) const;
index 18741778fc9136835b937f2648ccee0a2c61e77f..8dad02890b6d1684c53c7e6656f1adf9b0983c4b 100644 (file)
@@ -107,29 +107,41 @@ int MEDCouplingRemapper::prepareEx(const MEDCouplingFieldTemplate *src, const ME
 int MEDCouplingRemapper::prepareInterpKernelOnly()
 {
   int meshInterpType=((int)_src_ft->getMesh()->getType()*16)+(int)_target_ft->getMesh()->getType();
+  // *** Remember:
+//  typedef enum
+//    {
+//      UNSTRUCTURED = 5,
+//      CARTESIAN = 7,
+//      EXTRUDED = 8,
+//      CURVE_LINEAR = 9,
+//      SINGLE_STATIC_GEO_TYPE_UNSTRUCTURED = 10,
+//      SINGLE_DYNAMIC_GEO_TYPE_UNSTRUCTURED = 11,
+//      IMAGE_GRID = 12
+//    } MEDCouplingMeshType;
+
   switch(meshInterpType)
   {
-    case 90:
-    case 91:
-    case 165:
-    case 181:
-    case 170:
-    case 171:
-    case 186:
-    case 187:
-    case 85://Unstructured-Unstructured
+    case 90:   // UNSTRUCTURED - SINGLE_STATIC_GEO_TYPE_UNSTRUCTURED
+    case 91:   // UNSTRUCTURED - SINGLE_DYNAMIC_GEO_TYPE_UNSTRUCTURED
+    case 165:  // SINGLE_STATIC_GEO_TYPE_UNSTRUCTURED - UNSTRUCTURED
+    case 181:  // SINGLE_DYNAMIC_GEO_TYPE_UNSTRUCTURED - UNSTRUCTURED
+    case 170:  // SINGLE_STATIC_GEO_TYPE_UNSTRUCTURED - SINGLE_STATIC_GEO_TYPE_UNSTRUCTURED
+    case 171:  // SINGLE_STATIC_GEO_TYPE_UNSTRUCTURED - SINGLE_DYNAMIC_GEO_TYPE_UNSTRUCTURED
+    case 186:  // SINGLE_DYNAMIC_GEO_TYPE_UNSTRUCTURED - SINGLE_STATIC_GEO_TYPE_UNSTRUCTURED
+    case 187:  // SINGLE_DYNAMIC_GEO_TYPE_UNSTRUCTURED - SINGLE_DYNAMIC_GEO_TYPE_UNSTRUCTURED
+    case 85:   // UNSTRUCTURED - UNSTRUCTURED
       return prepareInterpKernelOnlyUU();
-    case 167:
-    case 183:
-    case 87://Unstructured-Cartesian
+    case 167:  // SINGLE_STATIC_GEO_TYPE_UNSTRUCTURED - CARTESIAN
+    case 183:  // SINGLE_DYNAMIC_GEO_TYPE_UNSTRUCTURED - CARTESIAN
+    case 87:   // UNSTRUCTURED - CARTESIAN
       return prepareInterpKernelOnlyUC();
-    case 122:
-    case 123:
-    case 117://Cartesian-Unstructured
+    case 122:  // CARTESIAN - SINGLE_STATIC_GEO_TYPE_UNSTRUCTURED
+    case 123:  // CARTESIAN - SINGLE_DYNAMIC_GEO_TYPE_UNSTRUCTURED
+    case 117:  // CARTESIAN - UNSTRUCTURED
       return prepareInterpKernelOnlyCU();
-    case 119://Cartesian-Cartesian
+    case 119:  // CARTESIAN - CARTESIAN
       return prepareInterpKernelOnlyCC();
-    case 136://Extruded-Extruded
+    case 136:  // EXTRUDED - EXTRUDED
       return prepareInterpKernelOnlyEE();
     default:
       throw INTERP_KERNEL::Exception("MEDCouplingRemapper::prepareInterpKernelOnly : Not managed type of meshes ! Dealt meshes type are : Unstructured<->Unstructured, Unstructured<->Cartesian, Cartesian<->Cartesian, Extruded<->Extruded !");
@@ -462,7 +474,7 @@ int MEDCouplingRemapper::prepareInterpKernelOnlyUU()
           INTERP_KERNEL::Interpolation2D1D::DuplicateFacesType duplicateFaces=interpolation.retrieveDuplicateFaces();
           if(!duplicateFaces.empty())
             {
-              std::ostringstream oss; oss << "An unexpected situation happend ! For the following 1D Cells are part of edges shared by 2D cells :\n";
+              std::ostringstream oss; oss << "An unexpected situation happened ! For the following 1D Cells are part of edges shared by 2D cells :\n";
               for(std::map<int,std::set<int> >::const_iterator it=duplicateFaces.begin();it!=duplicateFaces.end();it++)
                 {
                   oss << "1D Cell #" << (*it).first << " is part of common edge of following 2D cells ids : ";
@@ -866,7 +878,7 @@ int MEDCouplingRemapper::CheckInterpolationMethodManageableByNotOnlyInterpKernel
 
 /*!
  * This method determines regarding \c _interp_matrix_pol attribute ( set by MEDCouplingRemapper::setInterpolationMatrixPolicy and by default equal
- * to IK_ONLY_PREFERED = 0 ) , which method will be applied. If \c true is returned the INTERP_KERNEL only method should be applied to \c false the \b not
+ * to IK_ONLY_PREFERED, which method will be applied. If \c true is returned the INTERP_KERNEL only method should be applied to \c false the \b not
  * only INTERP_KERNEL method should be applied.
  */
 bool MEDCouplingRemapper::isInterpKernelOnlyOrNotOnly() const
index 74e27545a34a867e82ac83a289409513cf9771f5..1374387ee82a635a5e046df8a5f8e8cb50e8ef96 100644 (file)
@@ -209,9 +209,9 @@ namespace ParaMEDMEM
     double*  local_bb = _domain_bounding_boxes+_union_group->myRank()*2*_local_cell_mesh_space_dim;
     double*  distant_bb =  _domain_bounding_boxes+irank*2*_local_cell_mesh_space_dim;
 
+    const double eps = 1e-12;
     for (int idim=0; idim < _local_cell_mesh_space_dim; idim++)
       {
-        const double eps =  1e-12;
         bool intersects = (distant_bb[idim*2]<local_bb[idim*2+1]+eps)
           && (local_bb[idim*2]<distant_bb[idim*2+1]+eps);
         if (!intersects) return false; 
index 09253d350770d8af062bb9dfcabda9d078d031f1..7093dac9ba0708334391b458f370ce3ae4e354a3 100644 (file)
@@ -53,8 +53,7 @@ namespace ParaMEDMEM
     \anchor ParaMEDMEMOverlapDECImgTest1
     \image html OverlapDEC1.png "Example split of the source and target mesh among the 3 procs"
 
-    \subsection ParaMEDMEMOverlapDECAlgoStep1 Step 1 : Bounding box exchange and global interaction
-    between procs computation.
+    \subsection ParaMEDMEMOverlapDECAlgoStep1 Step 1 : Bounding box exchange and global interaction between procs computation.
 
     In order to reduce as much as possible the amount of communications between distant processors,
     every processor computes a bounding box for A and B. Then a AllToAll communication is performed
@@ -274,9 +273,16 @@ namespace ParaMEDMEM
   {
     if(!isInGroup())
       return ;
+    // Check number of components of field on both side (for now allowing void field/mesh on one proc is not allowed)
+    if (!_source_field || !_source_field->getField())
+      throw INTERP_KERNEL::Exception("OverlapDEC::synchronize(): currently, having a void source field on a proc is not allowed!");
+    if (!_target_field || !_target_field->getField())
+      throw INTERP_KERNEL::Exception("OverlapDEC::synchronize(): currently, having a void target field on a proc is not allowed!");
+    if (_target_field->getField()->getNumberOfComponents() != _source_field->getField()->getNumberOfComponents())
+      throw INTERP_KERNEL::Exception("OverlapDEC::synchronize(): source and target field have different number of components!");
     delete _interpolation_matrix;
     _interpolation_matrix=new OverlapInterpolationMatrix(_source_field,_target_field,*_group,*this,*this);
-    OverlapElementLocator locator(_source_field,_target_field,*_group);
+    OverlapElementLocator locator(_source_field,_target_field,*_group, getBoundingBoxAdjustmentAbs());
     locator.copyOptions(*this);
     locator.exchangeMeshes(*_interpolation_matrix);
     std::vector< std::pair<int,int> > jobs=locator.getToDoList();
@@ -290,7 +296,7 @@ namespace ParaMEDMEM
         const DataArrayInt *trgIds=locator.getTargetIds((*it).second);
         _interpolation_matrix->addContribution(src,srcIds,srcMeth,(*it).first,trg,trgIds,trgMeth,(*it).second);
       }
-    _interpolation_matrix->prepare(locator.getProcsInInteraction());
+    _interpolation_matrix->prepare(locator.getProcsToSendFieldData());
     _interpolation_matrix->computeDeno();
   }
 
index b7b9b8c2ffa17c03313108f52a82983ad15fe50d..0bf57b2ea44c077ba9d137336c76cf1a9166bfa2 100644 (file)
@@ -43,7 +43,7 @@ namespace ParaMEDMEM
     void synchronize();
     void attachSourceLocalField(ParaFIELD *field, bool ownPt=false);
     void attachTargetLocalField(ParaFIELD *field, bool ownPt=false);
-    ProcessorGroup *getGrp() { return _group; }
+    ProcessorGroup *getGroup() { return _group; }
     bool isInGroup() const;
   private:
     bool _own_group;
index 51560e14579c4738e995336b73315ad8443d8047..134fc400835f5521464e7ac6402d013470f92423 100644 (file)
@@ -39,20 +39,24 @@ using namespace std;
 
 namespace ParaMEDMEM 
 { 
-  OverlapElementLocator::OverlapElementLocator(const ParaFIELD *sourceField, const ParaFIELD *targetField, const ProcessorGroup& group)
+  const int OverlapElementLocator::START_TAG_MESH_XCH = 1140;
+
+  OverlapElementLocator::OverlapElementLocator(const ParaFIELD *sourceField, const ParaFIELD *targetField,
+                                               const ProcessorGroup& group, double epsAbs)
     : _local_source_field(sourceField),
       _local_target_field(targetField),
       _local_source_mesh(0),
       _local_target_mesh(0),
       _domain_bounding_boxes(0),
-      _group(group)
+      _group(group),
+      _epsAbs(epsAbs)
   { 
     if(_local_source_field)
       _local_source_mesh=_local_source_field->getSupport()->getCellMesh();
     if(_local_target_field)
       _local_target_mesh=_local_target_field->getSupport()->getCellMesh();
     _comm=getCommunicator();
-    computeBoundingBoxes();
+    computeBoundingBoxesAndTodoList();
   }
 
   OverlapElementLocator::~OverlapElementLocator()
@@ -66,7 +70,7 @@ namespace ParaMEDMEM
     return group->getComm();
   }
 
-  void OverlapElementLocator::computeBoundingBoxes()
+  void OverlapElementLocator::computeBoundingBoxesAndTodoList()
   {
     CommInterface comm_interface=_group.getCommInterface();
     const MPIProcessorGroup* group=static_cast<const MPIProcessorGroup*> (&_group);
@@ -113,19 +117,21 @@ namespace ParaMEDMEM
       for(int j=0;j<_group.size();j++)
         {
           if(intersectsBoundingBox(i,j))
+            {
             _proc_pairs[i].push_back(j);
+//            std::cout << "("  << _group.myRank() << ") PROC pair: " << i << "," << j << std::endl;
+            }
         }
-
     // OK now let's assigning as balanced as possible, job to each proc of group
-    std::vector< std::vector< std::pair<int,int> > > pairsToBeDonePerProc(_group.size());
+    std::vector< std::vector< ProcCouple > > pairsToBeDonePerProc(_group.size());
     int i=0;
     for(std::vector< std::vector< int > >::const_iterator it1=_proc_pairs.begin();it1!=_proc_pairs.end();it1++,i++)
       for(std::vector< int >::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
         {
           if(pairsToBeDonePerProc[i].size()<=pairsToBeDonePerProc[*it2].size())//it includes the fact that i==*it2
-            pairsToBeDonePerProc[i].push_back(std::pair<int,int>(i,*it2));
+            pairsToBeDonePerProc[i].push_back(ProcCouple(i,*it2));
           else
-            pairsToBeDonePerProc[*it2].push_back(std::pair<int,int>(i,*it2));
+            pairsToBeDonePerProc[*it2].push_back(ProcCouple(i,*it2));
         }
     //Keeping todo list of current proc. _to_do_list contains a set of pair where at least _group.myRank() appears once.
     //This proc will be in charge to perform interpolation of any of element of '_to_do_list'
@@ -135,20 +141,32 @@ namespace ParaMEDMEM
     int myProcId=_group.myRank();
     _to_do_list=pairsToBeDonePerProc[myProcId];
 
-    //Feeding now '_procs_to_send'. A same id can appears twice. The second parameter in pair means what to send true=source, false=target
-    _procs_to_send.clear();
+//    std::stringstream scout;
+//    scout << "(" << myProcId << ") my TODO list is: ";
+//    for (std::vector< ProcCouple >::const_iterator itdbg=_to_do_list.begin(); itdbg!=_to_do_list.end(); itdbg++)
+//      scout << "(" << (*itdbg).first << "," << (*itdbg).second << ")";
+//    std::cout << scout.str() << "\n";
+
+    // Feeding now '_procs_to_send*'. A same id can appears twice. The second parameter in pair means what
+    // to send true=source, false=target
+    _procs_to_send_mesh.clear();
+    _procs_to_send_field.clear();
     for(int i=_group.size()-1;i>=0;i--)
-      if(i!=myProcId)
-        {
-          const std::vector< std::pair<int,int> >& anRemoteProcToDoList=pairsToBeDonePerProc[i];
-          for(std::vector< std::pair<int,int> >::const_iterator it=anRemoteProcToDoList.begin();it!=anRemoteProcToDoList.end();it++)
-            {
-              if((*it).first==myProcId)
-                _procs_to_send.push_back(std::pair<int,bool>(i,true));
-              if((*it).second==myProcId)
-                _procs_to_send.push_back(std::pair<int,bool>(i,false));
-            }
-        }
+      {
+        const std::vector< ProcCouple >& anRemoteProcToDoList=pairsToBeDonePerProc[i];
+        for(std::vector< ProcCouple >::const_iterator it=anRemoteProcToDoList.begin();it!=anRemoteProcToDoList.end();it++)
+          {
+            if((*it).first==myProcId)
+              {
+                if(i!=myProcId)
+                  _procs_to_send_mesh.push_back(Proc_SrcOrTgt(i,true));
+                _procs_to_send_field.push_back((*it).second);
+              }
+            if((*it).second==myProcId)
+              if(i!=myProcId)
+                _procs_to_send_mesh.push_back(Proc_SrcOrTgt(i,false));
+          }
+      }
   }
 
   /*!
@@ -159,39 +177,40 @@ namespace ParaMEDMEM
   {
     int myProcId=_group.myRank();
     //starting to receive every procs whose id is lower than myProcId.
-    std::vector< std::pair<int,int> > toDoListForFetchRemaining;
-    for(std::vector< std::pair<int,int> >::const_iterator it=_to_do_list.begin();it!=_to_do_list.end();it++)
+    std::vector< ProcCouple > toDoListForFetchRemaining;
+    for(std::vector< ProcCouple >::const_iterator it=_to_do_list.begin();it!=_to_do_list.end();it++)
       {
-        if((*it).first!=(*it).second)
+        int first = (*it).first, second = (*it).second;
+        if(first!=second)
           {
-            if((*it).first==myProcId)
+            if(first==myProcId)
               {
-                if((*it).second<myProcId)
-                  receiveRemoteMesh((*it).second,false);
+                if(second<myProcId)
+                  receiveRemoteMeshFrom(second,false);
                 else
-                  toDoListForFetchRemaining.push_back(std::pair<int,int>((*it).first,(*it).second));
+                  toDoListForFetchRemaining.push_back(ProcCouple(first,second));
               }
             else
               {//(*it).second==myProcId
-                if((*it).first<myProcId)
-                  receiveRemoteMesh((*it).first,true);
+                if(first<myProcId)
+                  receiveRemoteMeshFrom(first,true);
                 else
-                  toDoListForFetchRemaining.push_back(std::pair<int,int>((*it).first,(*it).second));
+                  toDoListForFetchRemaining.push_back(ProcCouple(first,second));
               }
           }
       }
     //sending source or target mesh to remote procs
-    for(std::vector< std::pair<int,bool> >::const_iterator it2=_procs_to_send.begin();it2!=_procs_to_send.end();it2++)
+    for(std::vector< Proc_SrcOrTgt >::const_iterator it2=_procs_to_send_mesh.begin();it2!=_procs_to_send_mesh.end();it2++)
       sendLocalMeshTo((*it2).first,(*it2).second,matrix);
     //fetching remaining meshes
-    for(std::vector< std::pair<int,int> >::const_iterator it=toDoListForFetchRemaining.begin();it!=toDoListForFetchRemaining.end();it++)
+    for(std::vector< ProcCouple >::const_iterator it=toDoListForFetchRemaining.begin();it!=toDoListForFetchRemaining.end();it++)
       {
         if((*it).first!=(*it).second)
           {
             if((*it).first==myProcId)
-              receiveRemoteMesh((*it).second,false);
+              receiveRemoteMeshFrom((*it).second,false);
             else//(*it).second==myProcId
-              receiveRemoteMesh((*it).first,true);
+              receiveRemoteMeshFrom((*it).first,true);
           }
       }
   }
@@ -211,8 +230,8 @@ namespace ParaMEDMEM
     int myProcId=_group.myRank();
     if(myProcId==procId)
       return _local_source_mesh;
-    std::pair<int,bool> p(procId,true);
-    std::map<std::pair<int,bool>, MEDCouplingAutoRefCountObjectPtr< MEDCouplingPointSet > >::const_iterator it=_remote_meshes.find(p);
+    Proc_SrcOrTgt p(procId,true);
+    std::map<Proc_SrcOrTgt, AutoMCPointSet >::const_iterator it=_remote_meshes.find(p);
     return (*it).second;
   }
 
@@ -221,8 +240,8 @@ namespace ParaMEDMEM
     int myProcId=_group.myRank();
     if(myProcId==procId)
       return 0;
-    std::pair<int,bool> p(procId,true);
-    std::map<std::pair<int,bool>, MEDCouplingAutoRefCountObjectPtr< DataArrayInt > >::const_iterator it=_remote_elems.find(p);
+    Proc_SrcOrTgt p(procId,true);
+    std::map<Proc_SrcOrTgt, AutoDAInt >::const_iterator it=_remote_elems.find(p);
     return (*it).second;
   }
 
@@ -231,8 +250,8 @@ namespace ParaMEDMEM
     int myProcId=_group.myRank();
     if(myProcId==procId)
       return _local_target_mesh;
-    std::pair<int,bool> p(procId,false);
-    std::map<std::pair<int,bool>, MEDCouplingAutoRefCountObjectPtr< MEDCouplingPointSet > >::const_iterator it=_remote_meshes.find(p);
+    Proc_SrcOrTgt p(procId,false);
+    std::map<Proc_SrcOrTgt, AutoMCPointSet >::const_iterator it=_remote_meshes.find(p);
     return (*it).second;
   }
 
@@ -241,11 +260,12 @@ namespace ParaMEDMEM
     int myProcId=_group.myRank();
     if(myProcId==procId)
       return 0;
-    std::pair<int,bool> p(procId,false);
-    std::map<std::pair<int,bool>, MEDCouplingAutoRefCountObjectPtr< DataArrayInt > >::const_iterator it=_remote_elems.find(p);
+    Proc_SrcOrTgt p(procId,false);
+    std::map<Proc_SrcOrTgt, AutoDAInt >::const_iterator it=_remote_elems.find(p);
     return (*it).second;
   }
 
+
   bool OverlapElementLocator::intersectsBoundingBox(int isource, int itarget) const
   {
     const double *source_bb=_domain_bounding_boxes+isource*2*2*_local_space_dim;
@@ -253,9 +273,8 @@ namespace ParaMEDMEM
 
     for (int idim=0; idim < _local_space_dim; idim++)
       {
-        const double eps = -1e-12;//tony to change
-        bool intersects = (target_bb[idim*2]<source_bb[idim*2+1]+eps)
-          && (source_bb[idim*2]<target_bb[idim*2+1]+eps);
+        bool intersects = (target_bb[idim*2]<source_bb[idim*2+1]+_epsAbs)
+          && (source_bb[idim*2]<target_bb[idim*2+1]+_epsAbs);
         if (!intersects)
           return false; 
       }
@@ -263,8 +282,8 @@ namespace ParaMEDMEM
   }
 
   /*!
-   * This methods sends local source if 'sourceOrTarget'==True to proc 'procId'.
-   * This methods sends local target if 'sourceOrTarget'==False to proc 'procId'.
+   * This methods sends (part of) local source if 'sourceOrTarget'==True to proc 'procId'.
+   * This methods sends (part of) local target if 'sourceOrTarget'==False to proc 'procId'.
    *
    * This method prepares the matrix too, for matrix assembling and future matrix-vector computation.
    */
@@ -274,7 +293,7 @@ namespace ParaMEDMEM
    const double *distant_bb=0;
    MEDCouplingPointSet *local_mesh=0;
    const ParaFIELD *field=0;
-   if(sourceOrTarget)//source for local but target for distant
+   if(sourceOrTarget)//source for local mesh but target for distant mesh
      {
        distant_bb=_domain_bounding_boxes+procId*2*2*_local_space_dim+2*_local_space_dim;
        local_mesh=_local_source_mesh;
@@ -286,35 +305,36 @@ namespace ParaMEDMEM
        local_mesh=_local_target_mesh;
        field=_local_target_field;
      }
-   MEDCouplingAutoRefCountObjectPtr<DataArrayInt> elems=local_mesh->getCellsInBoundingBox(distant_bb,getBoundingBoxAdjustment());
-   DataArrayInt *idsToSend;
-   MEDCouplingPointSet *send_mesh=static_cast<MEDCouplingPointSet *>(field->getField()->buildSubMeshData(elems->begin(),elems->end(),idsToSend));
+   AutoDAInt elems=local_mesh->getCellsInBoundingBox(distant_bb,getBoundingBoxAdjustment());
+   DataArrayInt *old2new_map;
+   MEDCouplingPointSet *send_mesh=static_cast<MEDCouplingPointSet *>(field->getField()->buildSubMeshData(elems->begin(),elems->end(),old2new_map));
    if(sourceOrTarget)
-     matrix.keepTracksOfSourceIds(procId,idsToSend);//Case#1 in Step2 of main algorithm.
+     matrix.keepTracksOfSourceIds(procId,old2new_map);
    else
-     matrix.keepTracksOfTargetIds(procId,idsToSend);//Case#0 in Step2 of main algorithm.
-   sendMesh(procId,send_mesh,idsToSend);
+     matrix.keepTracksOfTargetIds(procId,old2new_map);
+   sendMesh(procId,send_mesh,old2new_map);
    send_mesh->decrRef();
-   idsToSend->decrRef();
+   old2new_map->decrRef();
   }
 
   /*!
    * This method recieves source remote mesh on proc 'procId' if sourceOrTarget==True
    * This method recieves target remote mesh on proc 'procId' if sourceOrTarget==False
    */
-  void OverlapElementLocator::receiveRemoteMesh(int procId, bool sourceOrTarget)
+  void OverlapElementLocator::receiveRemoteMeshFrom(int procId, bool sourceOrTarget)
   {
-    DataArrayInt *da=0;
+    DataArrayInt *old2new_map=0;
     MEDCouplingPointSet *m=0;
-    receiveMesh(procId,m,da);
-    std::pair<int,bool> p(procId,sourceOrTarget);
+    receiveMesh(procId,m,old2new_map);
+    Proc_SrcOrTgt p(procId,sourceOrTarget);
     _remote_meshes[p]=m;
-    _remote_elems[p]=da;
+    _remote_elems[p]=old2new_map;
   }
 
   void OverlapElementLocator::sendMesh(int procId, const MEDCouplingPointSet *mesh, const DataArrayInt *idsToSend) const
   {
     CommInterface comInterface=_group.getCommInterface();
+
     // First stage : exchanging sizes
     vector<double> tinyInfoLocalD;//tinyInfoLocalD not used for the moment
     vector<int> tinyInfoLocal;
@@ -325,16 +345,16 @@ namespace ParaMEDMEM
     int lgth[2];
     lgth[0]=tinyInfoLocal.size();
     lgth[1]=idsToSend->getNbOfElems();
-    comInterface.send(&lgth,2,MPI_INT,procId,1140,*_comm);
-    comInterface.send(&tinyInfoLocal[0],tinyInfoLocal.size(),MPI_INT,procId,1141,*comm);
+    comInterface.send(&lgth,2,MPI_INT,procId,START_TAG_MESH_XCH,*_comm);
+    comInterface.send(&tinyInfoLocal[0],tinyInfoLocal.size(),MPI_INT,procId,START_TAG_MESH_XCH+1,*comm);
     //
     DataArrayInt *v1Local=0;
     DataArrayDouble *v2Local=0;
     mesh->serialize(v1Local,v2Local);
-    comInterface.send(v1Local->getPointer(),v1Local->getNbOfElems(),MPI_INT,procId,1142,*comm);
-    comInterface.send(v2Local->getPointer(),v2Local->getNbOfElems(),MPI_DOUBLE,procId,1143,*comm);
+    comInterface.send(v1Local->getPointer(),v1Local->getNbOfElems(),MPI_INT,procId,START_TAG_MESH_XCH+2,*comm);
+    comInterface.send(v2Local->getPointer(),v2Local->getNbOfElems(),MPI_DOUBLE,procId,START_TAG_MESH_XCH+3,*comm);
     //finished for mesh, ids now
-    comInterface.send(const_cast<int *>(idsToSend->getConstPointer()),lgth[1],MPI_INT,procId,1144,*comm);
+    comInterface.send(const_cast<int *>(idsToSend->getConstPointer()),lgth[1],MPI_INT,procId,START_TAG_MESH_XCH+4,*comm);
     //
     v1Local->decrRef();
     v2Local->decrRef();
@@ -346,19 +366,19 @@ namespace ParaMEDMEM
     MPI_Status status;
     const MPI_Comm *comm=getCommunicator();
     CommInterface comInterface=_group.getCommInterface();
-    comInterface.recv(lgth,2,MPI_INT,procId,1140,*_comm,&status);
+    comInterface.recv(lgth,2,MPI_INT,procId,START_TAG_MESH_XCH,*_comm,&status);
     std::vector<int> tinyInfoDistant(lgth[0]);
     ids=DataArrayInt::New();
     ids->alloc(lgth[1],1);
-    comInterface.recv(&tinyInfoDistant[0],lgth[0],MPI_INT,procId,1141,*comm,&status);
+    comInterface.recv(&tinyInfoDistant[0],lgth[0],MPI_INT,procId,START_TAG_MESH_XCH+1,*comm,&status);
     mesh=MEDCouplingPointSet::BuildInstanceFromMeshType((MEDCouplingMeshType)tinyInfoDistant[0]);
     std::vector<std::string> unusedTinyDistantSts;
     vector<double> tinyInfoDistantD(1);//tinyInfoDistantD not used for the moment
     DataArrayInt *v1Distant=DataArrayInt::New();
     DataArrayDouble *v2Distant=DataArrayDouble::New();
     mesh->resizeForUnserialization(tinyInfoDistant,v1Distant,v2Distant,unusedTinyDistantSts);
-    comInterface.recv(v1Distant->getPointer(),v1Distant->getNbOfElems(),MPI_INT,procId,1142,*comm,&status);
-    comInterface.recv(v2Distant->getPointer(),v2Distant->getNbOfElems(),MPI_DOUBLE,procId,1143,*comm,&status);
+    comInterface.recv(v1Distant->getPointer(),v1Distant->getNbOfElems(),MPI_INT,procId,START_TAG_MESH_XCH+2,*comm,&status);
+    comInterface.recv(v2Distant->getPointer(),v2Distant->getNbOfElems(),MPI_DOUBLE,procId,START_TAG_MESH_XCH+3,*comm,&status);
     mesh->unserialization(tinyInfoDistantD,tinyInfoDistant,v1Distant,v2Distant,unusedTinyDistantSts);
     //finished for mesh, ids now
     comInterface.recv(ids->getPointer(),lgth[1],MPI_INT,procId,1144,*comm,&status);
index 6ce2677f240c559981edc513d07ca7eacd166a55..566395f9a291697739c376c6cb216c80b8c173a6 100644 (file)
@@ -38,15 +38,17 @@ namespace ParaMEDMEM
   class ProcessorGroup;
   class OverlapInterpolationMatrix;
   
+  typedef std::pair<int,int>   ProcCouple;     // a couple of proc IDs, typically used to define a exchange betw 2 procs
+
   class OverlapElementLocator : public INTERP_KERNEL::InterpolationOptions
   {
   public:
-    OverlapElementLocator(const ParaFIELD *sourceField, const ParaFIELD *targetField, const ProcessorGroup& group);
+    OverlapElementLocator(const ParaFIELD *sourceField, const ParaFIELD *targetField, const ProcessorGroup& group,double epsAbs);
     virtual ~OverlapElementLocator();
     const MPI_Comm *getCommunicator() const;
     void exchangeMeshes(OverlapInterpolationMatrix& matrix);
     std::vector< std::pair<int,int> > getToDoList() const { return _to_do_list; }
-    std::vector< std::vector< int > > getProcsInInteraction() const { return _proc_pairs; }
+    std::vector< int > getProcsToSendFieldData() const { return _procs_to_send_field; }
     std::string getSourceMethod() const;
     std::string getTargetMethod() const;
     const MEDCouplingPointSet *getSourceMesh(int procId) const;
@@ -54,36 +56,49 @@ namespace ParaMEDMEM
     const MEDCouplingPointSet *getTargetMesh(int procId) const;
     const DataArrayInt *getTargetIds(int procId) const;
   private:
-    void computeBoundingBoxes();
+    void computeBoundingBoxesAndTodoList();
     bool intersectsBoundingBox(int i, int j) const;
     void sendLocalMeshTo(int procId, bool sourceOrTarget, OverlapInterpolationMatrix& matrix) const;
-    void receiveRemoteMesh(int procId, bool sourceOrTarget);
+    void receiveRemoteMeshFrom(int procId, bool sourceOrTarget);
     void sendMesh(int procId, const MEDCouplingPointSet *mesh, const DataArrayInt *idsToSend) const;
     void receiveMesh(int procId, MEDCouplingPointSet* &mesh, DataArrayInt *&ids) const;
   private:
+    typedef MEDCouplingAutoRefCountObjectPtr< MEDCouplingPointSet >  AutoMCPointSet;
+    typedef MEDCouplingAutoRefCountObjectPtr< DataArrayInt >         AutoDAInt;
+    typedef std::pair<int,bool>  Proc_SrcOrTgt;  // a key indicating a proc ID and whether the data is for source mesh/field or target mesh/field
+
+    static const int START_TAG_MESH_XCH;
+
     const ParaFIELD *_local_source_field;
     const ParaFIELD *_local_target_field;
+
     int _local_space_dim;
     MEDCouplingPointSet *_local_source_mesh;
     MEDCouplingPointSet *_local_target_mesh;
-    std::vector<MEDCouplingPointSet*> _distant_cell_meshes;
-    std::vector<MEDCouplingPointSet*> _distant_face_meshes;
-    //! of size _group.size(). Contains for each source proc i, the ids of proc j the targets interact with. This vector is common for all procs in _group. 
+
+    /*! of size _group.size(). Contains for each source proc i, the ids of proc j the targets interact with.
+        This vector is common for all procs in _group. */
     std::vector< std::vector< int > > _proc_pairs;
-    //! list of interpolations couple to be done
-    std::vector< std::pair<int,int> > _to_do_list;
-    std::vector< std::pair<int,bool> > _procs_to_send;
-    std::map<std::pair<int,bool>, MEDCouplingAutoRefCountObjectPtr< MEDCouplingPointSet > > _remote_meshes;
-    std::map<std::pair<int,bool>, MEDCouplingAutoRefCountObjectPtr< DataArrayInt > > _remote_elems;
+    //! list of interpolation couples to be done by this proc only. This is a simple extraction of the member _pairsToBeDonePerProc
+    std::vector< ProcCouple > _to_do_list;
+    //! list of procs the local proc will have to send mesh data to:
+    std::vector< Proc_SrcOrTgt > _procs_to_send_mesh;
+    /*! list of procs the local proc will have to send field data to for the final matrix-vector computation:
+     * This can be different from _procs_to_send_mesh because interpolation matrix bits are computed on a potentially
+     * different proc than the target one.   */
+    std::vector< int > _procs_to_send_field;
+    //! Set of distant meshes
+    std::map< Proc_SrcOrTgt,  AutoMCPointSet > _remote_meshes;
+    //! Set of cell ID mappings for the above distant meshes (because only part of the meshes are exchanged)
+    std::map< Proc_SrcOrTgt, AutoDAInt > _remote_elems;
     double* _domain_bounding_boxes;
-    const ProcessorGroup& _group;
+    //! bounding box absolute adjustment
+    double _epsAbs;
+
     std::vector<int> _distant_proc_ids;
+
+    const ProcessorGroup& _group;
     const MPI_Comm *_comm;
-    //Attributes only used by lazy side
-    //std::vector<double> _values_added;
-    //std::vector< std::vector<int> > _ids_per_working_proc;
-    //std::vector< std::vector<int> > _ids_per_working_proc3;
-    //std::vector< std::vector<double> > _values_per_working_proc;
   };
 
 }
index b57541bb87b21e8cdfdc1c89dcab7e27ca343e0b..95b7e1b942198468d5772c6397dd6fa94270c63a 100644 (file)
@@ -58,10 +58,6 @@ namespace ParaMEDMEM
     _mapping(group),
     _group(group)
   {
-    int nbelems = source_field->getField()->getNumberOfTuples();
-    _row_offsets.resize(nbelems+1);
-    _coeffs.resize(nbelems);
-    _target_volume.resize(nbelems);
   }
 
   void OverlapInterpolationMatrix::keepTracksOfSourceIds(int procId, DataArrayInt *ids)
@@ -78,13 +74,20 @@ namespace ParaMEDMEM
   {
   }
 
+  // TODO? Merge with MEDCouplingRemapper::prepareInterpKernelOnlyUU() ?
+  /**!
+   * @param srcIds is null if the source mesh is on the local proc
+   * @param trgIds is null if the source mesh is on the local proc
+   *
+   * One of the 2 is necessarily null (the two can be null together)
+   */
   void OverlapInterpolationMatrix::addContribution(const MEDCouplingPointSet *src, const DataArrayInt *srcIds, const std::string& srcMeth, int srcProcId,
                                                    const MEDCouplingPointSet *trg, const DataArrayInt *trgIds, const std::string& trgMeth, int trgProcId)
   {
     std::string interpMethod(srcMeth);
     interpMethod+=trgMeth;
     //creating the interpolator structure
-    vector<map<int,double> > surfaces;
+    vector<SparseDoubleVec > sparse_matrix_part;
     int colSize=0;
     //computation of the intersection volumes between source and target elements
     const MEDCouplingUMesh *trgC=dynamic_cast<const MEDCouplingUMesh *>(trg);
@@ -95,19 +98,19 @@ namespace ParaMEDMEM
           {
             MEDCouplingNormalizedUnstructuredMesh<2,2> target_mesh_wrapper(trgC);
             INTERP_KERNEL::Interpolation2D interpolation(*this);
-            colSize=interpolation.fromIntegralUniform(target_mesh_wrapper,surfaces,trgMeth);
+            colSize=interpolation.fromIntegralUniform(target_mesh_wrapper,sparse_matrix_part,trgMeth);
           }
         else if(trgC->getMeshDimension()==3 && trgC->getSpaceDimension()==3)
           {
             MEDCouplingNormalizedUnstructuredMesh<3,3> target_mesh_wrapper(trgC);
             INTERP_KERNEL::Interpolation3D interpolation(*this);
-            colSize=interpolation.fromIntegralUniform(target_mesh_wrapper,surfaces,trgMeth);
+            colSize=interpolation.fromIntegralUniform(target_mesh_wrapper,sparse_matrix_part,trgMeth);
           }
         else if(trgC->getMeshDimension()==2 && trgC->getSpaceDimension()==3)
           {
             MEDCouplingNormalizedUnstructuredMesh<3,2> target_mesh_wrapper(trgC);
             INTERP_KERNEL::Interpolation3DSurf interpolation(*this);
-            colSize=interpolation.fromIntegralUniform(target_mesh_wrapper,surfaces,trgMeth);
+            colSize=interpolation.fromIntegralUniform(target_mesh_wrapper,sparse_matrix_part,trgMeth);
           }
         else
           throw INTERP_KERNEL::Exception("No para interpolation available for the given mesh and space dimension of source mesh to -1D targetMesh");
@@ -118,19 +121,19 @@ namespace ParaMEDMEM
           {
             MEDCouplingNormalizedUnstructuredMesh<2,2> local_mesh_wrapper(srcC);
             INTERP_KERNEL::Interpolation2D interpolation(*this);
-            colSize=interpolation.toIntegralUniform(local_mesh_wrapper,surfaces,srcMeth);
+            colSize=interpolation.toIntegralUniform(local_mesh_wrapper,sparse_matrix_part,srcMeth);
           }
         else if(srcC->getMeshDimension()==3 && srcC->getSpaceDimension()==3)
           {
             MEDCouplingNormalizedUnstructuredMesh<3,3> local_mesh_wrapper(srcC);
             INTERP_KERNEL::Interpolation3D interpolation(*this);
-            colSize=interpolation.toIntegralUniform(local_mesh_wrapper,surfaces,srcMeth);
+            colSize=interpolation.toIntegralUniform(local_mesh_wrapper,sparse_matrix_part,srcMeth);
           }
         else if(srcC->getMeshDimension()==2 && srcC->getSpaceDimension()==3)
           {
             MEDCouplingNormalizedUnstructuredMesh<3,2> local_mesh_wrapper(srcC);
             INTERP_KERNEL::Interpolation3DSurf interpolation(*this);
-            colSize=interpolation.toIntegralUniform(local_mesh_wrapper,surfaces,srcMeth);
+            colSize=interpolation.toIntegralUniform(local_mesh_wrapper,sparse_matrix_part,srcMeth);
           }
         else
           throw INTERP_KERNEL::Exception("No para interpolation available for the given mesh and space dimension of distant mesh to -1D sourceMesh");
@@ -142,9 +145,7 @@ namespace ParaMEDMEM
         MEDCouplingNormalizedUnstructuredMesh<3,3> source_wrapper(srcC);
         
         INTERP_KERNEL::Interpolation3D2D interpolator (*this);
-        colSize=interpolator.interpolateMeshes(source_wrapper,target_wrapper,surfaces,interpMethod);
-        target_wrapper.releaseTempArrays();
-        source_wrapper.releaseTempArrays();
+        colSize=interpolator.interpolateMeshes(source_wrapper,target_wrapper,sparse_matrix_part,interpMethod);
       }
     else if ( src->getMeshDimension() == 3 && trg->getMeshDimension() == 2
               && trg->getSpaceDimension() == 3 && src->getSpaceDimension() == 3 )
@@ -153,12 +154,10 @@ namespace ParaMEDMEM
         MEDCouplingNormalizedUnstructuredMesh<3,3> source_wrapper(srcC);
         
         INTERP_KERNEL::Interpolation3D2D interpolator (*this);
-        vector<map<int,double> > surfacesTranspose;
-        colSize=interpolator.interpolateMeshes(target_wrapper,source_wrapper,surfaces,interpMethod);//not a bug target in source.
-        TransposeMatrix(surfacesTranspose,colSize,surfaces);
-        colSize=surfacesTranspose.size();
-        target_wrapper.releaseTempArrays();
-        source_wrapper.releaseTempArrays();
+        vector<SparseDoubleVec > matrixTranspose;
+        colSize=interpolator.interpolateMeshes(target_wrapper,source_wrapper,sparse_matrix_part,interpMethod);//not a bug target in source.
+        TransposeMatrix(matrixTranspose,colSize,sparse_matrix_part);
+        colSize=matrixTranspose.size();
       }
     else if ( src->getMeshDimension() == 1 && trg->getMeshDimension() == 2
               && trg->getSpaceDimension() == 2 && src->getSpaceDimension() == 2 )
@@ -167,9 +166,7 @@ namespace ParaMEDMEM
         MEDCouplingNormalizedUnstructuredMesh<2,2> source_wrapper(srcC);
         
         INTERP_KERNEL::Interpolation2D1D interpolator (*this);
-        colSize=interpolator.interpolateMeshes(source_wrapper,target_wrapper,surfaces,interpMethod);
-        target_wrapper.releaseTempArrays();
-        source_wrapper.releaseTempArrays();
+        colSize=interpolator.interpolateMeshes(source_wrapper,target_wrapper,sparse_matrix_part,interpMethod);
       }
     else if ( src->getMeshDimension() == 2 && trg->getMeshDimension() == 1
               && trg->getSpaceDimension() == 2 && src->getSpaceDimension() == 2 )
@@ -178,12 +175,10 @@ namespace ParaMEDMEM
         MEDCouplingNormalizedUnstructuredMesh<2,2> source_wrapper(srcC);
         
         INTERP_KERNEL::Interpolation2D1D interpolator (*this);
-        vector<map<int,double> > surfacesTranspose;
-        colSize=interpolator.interpolateMeshes(target_wrapper,source_wrapper,surfacesTranspose,interpMethod);//not a bug target in source.
-        TransposeMatrix(surfacesTranspose,colSize,surfaces);
-        colSize=surfacesTranspose.size();
-        target_wrapper.releaseTempArrays();
-        source_wrapper.releaseTempArrays();
+        vector<SparseDoubleVec > matrixTranspose;
+        colSize=interpolator.interpolateMeshes(target_wrapper,source_wrapper,matrixTranspose,interpMethod);//not a bug target in source.
+        TransposeMatrix(matrixTranspose,colSize,sparse_matrix_part);
+        colSize=matrixTranspose.size();
       }
     else if (trg->getMeshDimension() != _source_support->getMeshDimension())
       {
@@ -196,9 +191,7 @@ namespace ParaMEDMEM
         MEDCouplingNormalizedUnstructuredMesh<1,1> source_wrapper(srcC);
 
         INTERP_KERNEL::Interpolation1D interpolation(*this);
-        colSize=interpolation.interpolateMeshes(source_wrapper,target_wrapper,surfaces,interpMethod);
-        target_wrapper.releaseTempArrays();
-        source_wrapper.releaseTempArrays();
+        colSize=interpolation.interpolateMeshes(source_wrapper,target_wrapper,sparse_matrix_part,interpMethod);
       }
     else if( trg->getMeshDimension() == 1
              && trg->getSpaceDimension() == 2 )
@@ -207,9 +200,7 @@ namespace ParaMEDMEM
         MEDCouplingNormalizedUnstructuredMesh<2,1> source_wrapper(srcC);
 
         INTERP_KERNEL::Interpolation2DCurve interpolation(*this);
-        colSize=interpolation.interpolateMeshes(source_wrapper,target_wrapper,surfaces,interpMethod);
-        target_wrapper.releaseTempArrays();
-        source_wrapper.releaseTempArrays();
+        colSize=interpolation.interpolateMeshes(source_wrapper,target_wrapper,sparse_matrix_part,interpMethod);
       }
     else if ( trg->getMeshDimension() == 2
               && trg->getSpaceDimension() == 3 )
@@ -218,9 +209,7 @@ namespace ParaMEDMEM
         MEDCouplingNormalizedUnstructuredMesh<3,2> source_wrapper(srcC);
 
         INTERP_KERNEL::Interpolation3DSurf interpolator (*this);
-        colSize=interpolator.interpolateMeshes(source_wrapper,target_wrapper,surfaces,interpMethod);
-        target_wrapper.releaseTempArrays();
-        source_wrapper.releaseTempArrays();
+        colSize=interpolator.interpolateMeshes(source_wrapper,target_wrapper,sparse_matrix_part,interpMethod);
       }
     else if ( trg->getMeshDimension() == 2
               && trg->getSpaceDimension() == 2)
@@ -229,9 +218,7 @@ namespace ParaMEDMEM
         MEDCouplingNormalizedUnstructuredMesh<2,2> source_wrapper(srcC);
 
         INTERP_KERNEL::Interpolation2D interpolator (*this);
-        colSize=interpolator.interpolateMeshes(source_wrapper,target_wrapper,surfaces,interpMethod);
-        target_wrapper.releaseTempArrays();
-        source_wrapper.releaseTempArrays();
+        colSize=interpolator.interpolateMeshes(source_wrapper,target_wrapper,sparse_matrix_part,interpMethod);
       }
     else if ( trg->getMeshDimension() == 3
               && trg->getSpaceDimension() == 3 )
@@ -240,45 +227,30 @@ namespace ParaMEDMEM
         MEDCouplingNormalizedUnstructuredMesh<3,3> source_wrapper(srcC);
 
         INTERP_KERNEL::Interpolation3D interpolator (*this);
-        colSize=interpolator.interpolateMeshes(source_wrapper,target_wrapper,surfaces,interpMethod);
-        target_wrapper.releaseTempArrays();
-        source_wrapper.releaseTempArrays();
+        colSize=interpolator.interpolateMeshes(source_wrapper,target_wrapper,sparse_matrix_part,interpMethod);
       }
     else
       {
-        throw INTERP_KERNEL::Exception("no interpolator exists for these mesh and space dimensions ");
+        throw INTERP_KERNEL::Exception("No interpolator exists for these mesh and space dimensions!");
       }
-    bool needSourceSurf=isSurfaceComputationNeeded(srcMeth);
-    MEDCouplingFieldDouble *source_triangle_surf=0;
-    if(needSourceSurf)
-      source_triangle_surf=src->getMeasureField(getMeasureAbsStatus());
-    //
-    fillDistributedMatrix(surfaces,srcIds,srcProcId,trgIds,trgProcId);
-    //
-    if(needSourceSurf)
-      source_triangle_surf->decrRef();
+    /* Fill distributed matrix:
+       In sparse_matrix_part rows refer to target, and columns (=first param of map in SparseDoubleVec)
+       refer to source.
+     */
+    _mapping.addContributionST(sparse_matrix_part,srcIds,srcProcId,trgIds,trgProcId);
   }
 
-  /*!
-   * \b res rows refers to target and column (first param of map) to source.
-   */
-  void OverlapInterpolationMatrix::fillDistributedMatrix(const std::vector< std::map<int,double> >& res,
-                                                         const DataArrayInt *srcIds, int srcProc,
-                                                         const DataArrayInt *trgIds, int trgProc)
-  {
-    _mapping.addContributionST(res,srcIds,srcProc,trgIds,trgProc);
-  }
 
   /*!
-   * 'procsInInteraction' gives the global view of interaction between procs.
-   * In 'procsInInteraction' for a proc with id i, is in interaction with procs listed in procsInInteraction[i]
+   * 'procsToSendField' gives the list of procs field data has to be sent to.
+   * See OverlapElementLocator::computeBoundingBoxesAndTodoList()
    */
-  void OverlapInterpolationMatrix::prepare(const std::vector< std::vector<int> >& procsInInteraction)
+  void OverlapInterpolationMatrix::prepare(const std::vector< int >& procsToSendField)
   {
     if(_source_support)
-      _mapping.prepare(procsInInteraction,_target_field->getField()->getNumberOfTuplesExpected());
+      _mapping.prepare(procsToSendField,_target_field->getField()->getNumberOfTuplesExpected());
     else
-      _mapping.prepare(procsInInteraction,0);
+      _mapping.prepare(procsToSendField,0);
   }
 
   void OverlapInterpolationMatrix::computeDeno()
@@ -299,17 +271,18 @@ namespace ParaMEDMEM
     _mapping.transposeMultiply(_target_field->getField(),_source_field->getField());
   }
   
-  bool OverlapInterpolationMatrix::isSurfaceComputationNeeded(const std::string& method) const
-  {
-    return method=="P0";
-  }
+//  bool OverlapInterpolationMatrix::isSurfaceComputationNeeded(const std::string& method) const
+//  {
+//    return method=="P0";
+//  }
 
-  void OverlapInterpolationMatrix::TransposeMatrix(const std::vector<std::map<int,double> >& matIn, int nbColsMatIn, std::vector<std::map<int,double> >& matOut)
+  void OverlapInterpolationMatrix::TransposeMatrix(const std::vector<SparseDoubleVec >& matIn,
+                                                   int nbColsMatIn, std::vector<SparseDoubleVec >& matOut)
   {
     matOut.resize(nbColsMatIn);
     int id=0;
-    for(std::vector<std::map<int,double> >::const_iterator iter1=matIn.begin();iter1!=matIn.end();iter1++,id++)
-      for(std::map<int,double>::const_iterator iter2=(*iter1).begin();iter2!=(*iter1).end();iter2++)
+    for(std::vector<SparseDoubleVec >::const_iterator iter1=matIn.begin();iter1!=matIn.end();iter1++,id++)
+      for(SparseDoubleVec::const_iterator iter2=(*iter1).begin();iter2!=(*iter1).end();iter2++)
         matOut[(*iter2).first][id]=(*iter2).second;
   }
 }
index 2190e9adddb3f6651f162cfc51092dccbffbafa8..2447079eeea8b016e8bf80d78f1af74ddda735d3 100644 (file)
@@ -54,7 +54,7 @@ namespace ParaMEDMEM
     void addContribution(const MEDCouplingPointSet *src, const DataArrayInt *srcIds, const std::string& srcMeth, int srcProcId,
                          const MEDCouplingPointSet *trg, const DataArrayInt *trgIds, const std::string& trgMeth, int trgProcId);
 
-    void prepare(const std::vector< std::vector<int> >& procsInInteraction);
+    void prepare(const std::vector< int > & procsToSendField);
     
     void computeDeno();
 
@@ -63,68 +63,19 @@ namespace ParaMEDMEM
     void transposeMultiply();
     
     virtual ~OverlapInterpolationMatrix();
-#if 0
-    void addContribution(MEDCouplingPointSet& distant_support, int iproc_distant,
-                         const int* distant_elems, const std::string& srcMeth, const std::string& targetMeth);
-    void finishContributionW(ElementLocator& elementLocator);
-    void finishContributionL(ElementLocator& elementLocator);
-    void multiply(MEDCouplingFieldDouble& field) const;
-    void transposeMultiply(MEDCouplingFieldDouble& field)const;
-    void prepare();
-    int getNbRows() const { return _row_offsets.size(); }
-    MPIAccessDEC* getAccessDEC() { return _mapping.getAccessDEC(); }
   private:
-    void computeConservVolDenoW(ElementLocator& elementLocator);
-    void computeIntegralDenoW(ElementLocator& elementLocator);
-    void computeRevIntegralDenoW(ElementLocator& elementLocator);
-    void computeGlobConstraintDenoW(ElementLocator& elementLocator);
-    void computeConservVolDenoL(ElementLocator& elementLocator);
-    void computeIntegralDenoL(ElementLocator& elementLocator);
-    void computeRevIntegralDenoL(ElementLocator& elementLocator);
-    
-    void computeLocalColSum(std::vector<double>& res) const;
-    void computeLocalRowSum(const std::vector<int>& distantProcs, std::vector<std::vector<int> >& resPerProcI,
-                            std::vector<std::vector<double> >& resPerProcD) const;
-    void computeGlobalRowSum(ElementLocator& elementLocator, std::vector<std::vector<double> >& denoStrorage, std::vector<std::vector<double> >& denoStrorageInv);
-    void computeGlobalColSum(std::vector<std::vector<double> >& denoStrorage);
-    void resizeGlobalColSum(std::vector<std::vector<double> >& denoStrorage);
-    void fillDSFromVM(int iproc_distant, const int* distant_elems, const std::vector< std::map<int,double> >& values, MEDCouplingFieldDouble *surf);
-    void serializeMe(std::vector< std::vector< std::map<int,double> > >& data1, std::vector<int>& data2) const;
-    void initialize();
-    void findAdditionnalElements(ElementLocator& elementLocator, std::vector<std::vector<int> >& elementsToAdd,
-                                 const std::vector<std::vector<int> >& resPerProcI, const std::vector<std::vector<int> >& globalIdsPartial);
-    void addGhostElements(const std::vector<int>& distantProcs, const std::vector<std::vector<int> >& elementsToAdd);
-    int mergePolicies(const std::vector<int>& policyPartial);
-    void mergeRowSum(const std::vector< std::vector<double> >& rowsPartialSumD, const std::vector< std::vector<int> >& globalIdsPartial,
-                     std::vector<int>& globalIdsLazySideInteraction, std::vector<double>& sumCorresponding);
-    void mergeRowSum2(const std::vector< std::vector<int> >& globalIdsPartial, std::vector< std::vector<double> >& rowsPartialSumD,
-                      const std::vector<int>& globalIdsLazySideInteraction, const std::vector<double>& sumCorresponding);
-    void mergeRowSum3(const std::vector< std::vector<int> >& globalIdsPartial, std::vector< std::vector<double> >& rowsPartialSumD);
-    void mergeCoeffs(const std::vector<int>& procsInInteraction, const std::vector< std::vector<int> >& rowsPartialSumI,
-                     const std::vector<std::vector<int> >& globalIdsPartial, std::vector<std::vector<double> >& denoStrorageInv);
-    void divideByGlobalRowSum(const std::vector<int>& distantProcs, const std::vector<std::vector<int> >& resPerProcI,
-                              const std::vector<std::vector<double> >& resPerProcD, std::vector<std::vector<double> >& deno);
-#endif
-  private:
-    bool isSurfaceComputationNeeded(const std::string& method) const;
-    void fillDistributedMatrix(const std::vector< std::map<int,double> >& res,
-                               const DataArrayInt *srcIds, int srcProc,
-                               const DataArrayInt *trgIds, int trgProc);
-    static void TransposeMatrix(const std::vector<std::map<int,double> >& matIn, int nbColsMatIn, std::vector<std::map<int,double> >& matOut);
+
+    static void TransposeMatrix(const std::vector<SparseDoubleVec>& matIn, int nbColsMatIn,
+                                std::vector<SparseDoubleVec>& matOut);
+//    bool isSurfaceComputationNeeded(const std::string& method) const;
   private:
-    ParaMEDMEM::ParaFIELD *_source_field;
-    ParaMEDMEM::ParaFIELD *_target_field;
-    std::vector<int> _row_offsets;
-    std::map<std::pair<int,int>, int > _col_offsets;
+    ParaFIELD           *_source_field;
+    ParaFIELD           *_target_field;
     MEDCouplingPointSet *_source_support;
     MEDCouplingPointSet *_target_support;
-    OverlapMapping _mapping;
+    OverlapMapping      _mapping;
  
     const ProcessorGroup& _group;
-    std::vector< std::vector<double> > _target_volume;
-    std::vector<std::vector<std::pair<int,double> > > _coeffs;
-    std::vector<std::vector<double> > _deno_multiply;
-    std::vector<std::vector<double> > _deno_reverse_multiply;
   };
 }
 
index abb7a1d1bf93cbb59a0801ee9572870d27dd1495..6871f1f3514232d7b22633d943386b8b238d5e7e 100644 (file)
@@ -36,46 +36,51 @@ OverlapMapping::OverlapMapping(const ProcessorGroup& group):_group(group)
 }
 
 /*!
- * This method keeps tracks of source ids to know in step 6 of main algorithm, which tuple ids to send away.
- * This method incarnates item#1 of step2 algorithm.
+ * Keeps the link between a given a proc holding source mesh data, and the corresponding cell IDs.
  */
 void OverlapMapping::keepTracksOfSourceIds(int procId, DataArrayInt *ids)
 {
   ids->incrRef();
-  _src_ids_st2.push_back(ids);
-  _src_proc_st2.push_back(procId);
+  _sent_src_ids_st2.push_back(ids);
+  _sent_src_proc_st2.push_back(procId);
 }
 
 /*!
- * This method keeps tracks of target ids to know in step 6 of main algorithm.
- * This method incarnates item#0 of step2 algorithm.
- */
+ * Same as keepTracksOfSourceIds() but for target mesh data.
+*/
 void OverlapMapping::keepTracksOfTargetIds(int procId, DataArrayInt *ids)
 {
   ids->incrRef();
-  _trg_ids_st2.push_back(ids);
-  _trg_proc_st2.push_back(procId);
+  _sent_trg_ids_st2.push_back(ids);
+  _sent_trg_proc_st2.push_back(procId);
 }
 
 /*!
- * This method stores from a matrix in format Target(rows)/Source(cols) for a source procId 'srcProcId' and for a target procId 'trgProcId'.
- * All ids (source and target) are in format of local ids. 
+ * This method stores in the local members the contribution coming from a matrix in format
+ * Target(rows)/Source(cols) for a source procId 'srcProcId' and for a target procId 'trgProcId'.
+ * All IDs received here (source and target) are in the format of local IDs.
+ *
+ * @param srcIds is null if the source mesh is on the local proc
+ * @param trgIds is null if the source mesh is on the local proc
+ *
+ * One of the 2 is necessarily null (the two can be null together)
  */
-void OverlapMapping::addContributionST(const std::vector< std::map<int,double> >& matrixST, const DataArrayInt *srcIds, int srcProcId, const DataArrayInt *trgIds, int trgProcId)
+void OverlapMapping::addContributionST(const std::vector< SparseDoubleVec >& matrixST, const DataArrayInt *srcIds, int srcProcId, const DataArrayInt *trgIds, int trgProcId)
 {
   _matrixes_st.push_back(matrixST);
   _source_proc_id_st.push_back(srcProcId);
   _target_proc_id_st.push_back(trgProcId);
-  if(srcIds)
+  if(srcIds)  // source mesh part is remote
     {//item#1 of step2 algorithm in proc m. Only to know in advanced nb of recv ids [ (0,1) computed on proc1 and Matrix-Vector on proc1 ]
       _nb_of_src_ids_proc_st2.push_back(srcIds->getNumberOfTuples());
       _src_ids_proc_st2.push_back(srcProcId);
     }
-  else
+  else        // source mesh part is local
     {//item#0 of step2 algorithm in proc k
       std::set<int> s;
-      for(std::vector< std::map<int,double> >::const_iterator it1=matrixST.begin();it1!=matrixST.end();it1++)
-        for(std::map<int,double>::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
+      // For all source IDs (=col indices) in the sparse matrix:
+      for(std::vector< SparseDoubleVec >::const_iterator it1=matrixST.begin();it1!=matrixST.end();it1++)
+        for(SparseDoubleVec::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
           s.insert((*it2).first);
       _src_ids_zip_st2.resize(_src_ids_zip_st2.size()+1);
       _src_ids_zip_st2.back().insert(_src_ids_zip_st2.back().end(),s.begin(),s.end());
@@ -84,14 +89,17 @@ void OverlapMapping::addContributionST(const std::vector< std::map<int,double> >
 }
 
 /*!
- * 'procsInInteraction' gives the global view of interaction between procs.
- * In 'procsInInteraction' for a proc with id i, is in interaction with procs listed in procsInInteraction[i].
+ * This method is in charge to send matrices in AlltoAll mode.
+ *
+ * 'procsToSendField' gives the list of procs field data has to be sent to.
+ * See OverlapElementLocator::computeBoundingBoxesAndTodoList()
  *
- * This method is in charge to send matrixes in AlltoAll mode.
- * After the call of this method 'this' contains the matrixST for all source elements of the current proc
+ * After the call of this method, 'this' contains the matrixST for all source cells of the current proc
  */
-void OverlapMapping::prepare(const std::vector< std::vector<int> >& procsInInteraction, int nbOfTrgElems)
+void OverlapMapping::prepare(const std::vector< int >& procsToSendField, int nbOfTrgElems)
 {
+//  printMatrixesST();
+
   CommInterface commInterface=_group.getCommInterface();
   const MPIProcessorGroup *group=static_cast<const MPIProcessorGroup*>(&_group);
   const MPI_Comm *comm=group->getComm();
@@ -101,12 +109,6 @@ void OverlapMapping::prepare(const std::vector< std::vector<int> >& procsInInter
   INTERP_KERNEL::AutoPtr<int> nbsend3=new int[grpSize];
   std::fill<int *>(nbsend,nbsend+grpSize,0);
   int myProcId=_group.myRank();
-  _proc_ids_to_recv_vector_st.clear();
-  int curProc=0;
-  for(std::vector< std::vector<int> >::const_iterator it1=procsInInteraction.begin();it1!=procsInInteraction.end();it1++,curProc++)
-    if(std::find((*it1).begin(),(*it1).end(),myProcId)!=(*it1).end())
-      _proc_ids_to_recv_vector_st.push_back(curProc);
-  _proc_ids_to_send_vector_st=procsInInteraction[myProcId];
   for(std::size_t i=0;i<_matrixes_st.size();i++)
     if(_source_proc_id_st[i]==myProcId)
       nbsend[_target_proc_id_st[i]]=_matrixes_st[i].size();
@@ -149,9 +151,46 @@ void OverlapMapping::prepare(const std::vector< std::vector<int> >& procsInInter
                     bigArrRecv2,bigArrDRecv2,nbrecv3,nbrecv4);
   //updating _src_ids_zip_st2 and _src_ids_zip_st2 with received matrix.
   updateZipSourceIdsForFuture();
-  //finish to fill _the_matrix_st with already in place matrix in _matrixes_st
+  //finish to fill _the_matrix_st with already in place matrix in _matrixes_st (local computation)
   finishToFillFinalMatrixST();
-  //printTheMatrix();
+  // Prepare proc lists for future field data exchange (mutliply()):
+  fillProcToSendRcvForMultiply(procsToSendField);
+  // Make some space on local proc:
+  _matrixes_st.clear();
+
+//  std::stringstream scout;
+//  scout << "\n(" << myProcId << ") to send:";
+//  for (std::vector< int >::const_iterator itdbg=_proc_ids_to_send_vector_st.begin(); itdbg!=_proc_ids_to_send_vector_st.end(); itdbg++)
+//    scout << "," << *itdbg;
+//  scout << "\n(" << myProcId << ") to recv:";
+//    for (std::vector< int >::const_iterator itdbg=_proc_ids_to_recv_vector_st.begin(); itdbg!=_proc_ids_to_recv_vector_st.end(); itdbg++)
+//      scout << "," << *itdbg;
+//  std::cout << scout.str() << "\n";
+//
+//  printTheMatrix();
+}
+
+/**
+ * Fill the members _proc_ids_to_send_vector_st and _proc_ids_to_recv_vector_st
+ * indicating for each proc to which proc it should send its source field data
+ * and from which proc it should receive source field data.
+ *
+ * Should be called once finishToFillFinalMatrixST() has been executed, i.e. when the
+ * local matrices are completly ready.
+ */
+void OverlapMapping::fillProcToSendRcvForMultiply(const std::vector< int >& procsToSendField)
+{
+//  _proc_ids_to_send_vector_st.clear();
+  _proc_ids_to_recv_vector_st.clear();
+  // Receiving side is easy - just inspect non-void terms in the final matrix
+  int i=0;
+  std::vector< std::vector< SparseDoubleVec > >::const_iterator it;
+  std::vector< SparseDoubleVec >::const_iterator it2;
+  for(it=_the_matrix_st.begin(); it!=_the_matrix_st.end(); it++, i++)
+    _proc_ids_to_recv_vector_st.push_back(_the_matrix_st_source_proc_id[i]);
+
+  // Sending side was computed in OverlapElementLocator::computeBoundingBoxesAndTodoList()
+  _proc_ids_to_send_vector_st = procsToSendField;
 }
 
 /*!
@@ -169,11 +208,11 @@ void OverlapMapping::computeDenoGlobConstraint()
       for(std::size_t j=0;j<sz2;j++)
         {
           double sum=0;
-          std::map<int,double>& mToFill=_the_deno_st[i][j];
-          const std::map<int,double>& m=_the_matrix_st[i][j];
-          for(std::map<int,double>::const_iterator it=m.begin();it!=m.end();it++)
+          SparseDoubleVec& mToFill=_the_deno_st[i][j];
+          const SparseDoubleVec& m=_the_matrix_st[i][j];
+          for(SparseDoubleVec::const_iterator it=m.begin();it!=m.end();it++)
             sum+=(*it).second;
-          for(std::map<int,double>::const_iterator it=m.begin();it!=m.end();it++)
+          for(SparseDoubleVec::const_iterator it=m.begin();it!=m.end();it++)
             mToFill[(*it).first]=sum;
         }
     }
@@ -184,7 +223,6 @@ void OverlapMapping::computeDenoGlobConstraint()
  */
 void OverlapMapping::computeDenoConservativeVolumic(int nbOfTuplesTrg)
 {
-  CommInterface commInterface=_group.getCommInterface();
   int myProcId=_group.myRank();
   //
   _the_deno_st.clear();
@@ -193,24 +231,24 @@ void OverlapMapping::computeDenoConservativeVolumic(int nbOfTuplesTrg)
   std::vector<double> deno(nbOfTuplesTrg);
   for(std::size_t i=0;i<sz1;i++)
     {
-      const std::vector< std::map<int,double> >& mat=_the_matrix_st[i];
+      const std::vector< SparseDoubleVec >& mat=_the_matrix_st[i];
       int curSrcId=_the_matrix_st_source_proc_id[i];
-      std::vector<int>::iterator isItem1=std::find(_trg_proc_st2.begin(),_trg_proc_st2.end(),curSrcId);
+      std::vector<int>::iterator isItem1=std::find(_sent_trg_proc_st2.begin(),_sent_trg_proc_st2.end(),curSrcId);
       int rowId=0;
-      if(isItem1==_trg_proc_st2.end() || curSrcId==myProcId)//item1 of step2 main algo. Simple, because rowId of mat are directly target ids.
+      if(isItem1==_sent_trg_proc_st2.end() || curSrcId==myProcId)//item1 of step2 main algo. Simple, because rowId of mat are directly target ids.
         {
-          for(std::vector< std::map<int,double> >::const_iterator it1=mat.begin();it1!=mat.end();it1++,rowId++)
-            for(std::map<int,double>::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
+          for(std::vector< SparseDoubleVec >::const_iterator it1=mat.begin();it1!=mat.end();it1++,rowId++)
+            for(SparseDoubleVec::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
               deno[rowId]+=(*it2).second;
         }
       else
         {//item0 of step2 main algo. More complicated.
           std::vector<int>::iterator fnd=isItem1;//std::find(_trg_proc_st2.begin(),_trg_proc_st2.end(),curSrcId);
-          int locId=std::distance(_trg_proc_st2.begin(),fnd);
-          const DataArrayInt *trgIds=_trg_ids_st2[locId];
+          int locId=std::distance(_sent_trg_proc_st2.begin(),fnd);
+          const DataArrayInt *trgIds=_sent_trg_ids_st2[locId];
           const int *trgIds2=trgIds->getConstPointer();
-          for(std::vector< std::map<int,double> >::const_iterator it1=mat.begin();it1!=mat.end();it1++,rowId++)
-            for(std::map<int,double>::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
+          for(std::vector< SparseDoubleVec >::const_iterator it1=mat.begin();it1!=mat.end();it1++,rowId++)
+            for(SparseDoubleVec::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
               deno[trgIds2[rowId]]+=(*it2).second;
         }
     }
@@ -218,26 +256,26 @@ void OverlapMapping::computeDenoConservativeVolumic(int nbOfTuplesTrg)
   for(std::size_t i=0;i<sz1;i++)
     {
       int rowId=0;
-      const std::vector< std::map<int,double> >& mat=_the_matrix_st[i];
+      const std::vector< SparseDoubleVec >& mat=_the_matrix_st[i];
       int curSrcId=_the_matrix_st_source_proc_id[i];
-      std::vector<int>::iterator isItem1=std::find(_trg_proc_st2.begin(),_trg_proc_st2.end(),curSrcId);
-      std::vector< std::map<int,double> >& denoM=_the_deno_st[i];
+      std::vector<int>::iterator isItem1=std::find(_sent_trg_proc_st2.begin(),_sent_trg_proc_st2.end(),curSrcId);
+      std::vector< SparseDoubleVec >& denoM=_the_deno_st[i];
       denoM.resize(mat.size());
-      if(isItem1==_trg_proc_st2.end() || curSrcId==myProcId)//item1 of step2 main algo. Simple, because rowId of mat are directly target ids.
+      if(isItem1==_sent_trg_proc_st2.end() || curSrcId==myProcId)//item1 of step2 main algo. Simple, because rowId of mat are directly target ids.
         {
           int rowId=0;
-          for(std::vector< std::map<int,double> >::const_iterator it1=mat.begin();it1!=mat.end();it1++,rowId++)
-            for(std::map<int,double>::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
+          for(std::vector< SparseDoubleVec >::const_iterator it1=mat.begin();it1!=mat.end();it1++,rowId++)
+            for(SparseDoubleVec::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
               denoM[rowId][(*it2).first]=deno[rowId];
         }
       else
         {
           std::vector<int>::iterator fnd=isItem1;
-          int locId=std::distance(_trg_proc_st2.begin(),fnd);
-          const DataArrayInt *trgIds=_trg_ids_st2[locId];
+          int locId=std::distance(_sent_trg_proc_st2.begin(),fnd);
+          const DataArrayInt *trgIds=_sent_trg_ids_st2[locId];
           const int *trgIds2=trgIds->getConstPointer();
-          for(std::vector< std::map<int,double> >::const_iterator it1=mat.begin();it1!=mat.end();it1++,rowId++)
-            for(std::map<int,double>::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
+          for(std::vector< SparseDoubleVec >::const_iterator it1=mat.begin();it1!=mat.end();it1++,rowId++)
+            for(SparseDoubleVec::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
               denoM[rowId][(*it2).first]=deno[trgIds2[rowId]];
         }
     }
@@ -275,8 +313,8 @@ void OverlapMapping::serializeMatrixStep0ST(const int *nbOfElemsSrc, int *&bigAr
           int start=offsets[_target_proc_id_st[i]];
           int *work=bigArr+start;
           *work=0;
-          const std::vector< std::map<int,double> >& mat=_matrixes_st[i];
-          for(std::vector< std::map<int,double> >::const_iterator it=mat.begin();it!=mat.end();it++,work++)
+          const std::vector< SparseDoubleVec >& mat=_matrixes_st[i];
+          for(std::vector< SparseDoubleVec >::const_iterator it=mat.begin();it!=mat.end();it++,work++)
             work[1]=work[0]+(*it).size();
         }
     }
@@ -295,6 +333,7 @@ void OverlapMapping::serializeMatrixStep0ST(const int *nbOfElemsSrc, int *&bigAr
 
 /*!
  * This method performs step#1 and step#2/3. It returns the size of expected array to get allToAllV.
+ * It is where the locally computed matrices are serialized to be sent to adequate final proc.
  */
 int OverlapMapping::serializeMatrixStep1ST(const int *nbOfElemsSrc, const int *recvStep0, const int *countStep0, const int *offsStep0,
                                            int *&bigArrI, double *&bigArrD, int *count, int *offsets,
@@ -322,9 +361,9 @@ int OverlapMapping::serializeMatrixStep1ST(const int *nbOfElemsSrc, const int *r
     {
       if(_source_proc_id_st[i]==myProcId)
         {
-          const std::vector< std::map<int,double> >& mat=_matrixes_st[i];
+          const std::vector< SparseDoubleVec >& mat=_matrixes_st[i];
           int lgthToSend=0;
-          for(std::vector< std::map<int,double> >::const_iterator it=mat.begin();it!=mat.end();it++)
+          for(std::vector< SparseDoubleVec >::const_iterator it=mat.begin();it!=mat.end();it++)
             lgthToSend+=(*it).size();
           count[_target_proc_id_st[i]]=lgthToSend;
           fullLgth+=lgthToSend;
@@ -341,11 +380,11 @@ int OverlapMapping::serializeMatrixStep1ST(const int *nbOfElemsSrc, const int *r
     {
       if(_source_proc_id_st[i]==myProcId)
         {
-          const std::vector< std::map<int,double> >& mat=_matrixes_st[i];
-          for(std::vector< std::map<int,double> >::const_iterator it1=mat.begin();it1!=mat.end();it1++)
+          const std::vector< SparseDoubleVec >& mat=_matrixes_st[i];
+          for(std::vector< SparseDoubleVec >::const_iterator it1=mat.begin();it1!=mat.end();it1++)
             {
               int j=0;
-              for(std::map<int,double>::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++,j++)
+              for(SparseDoubleVec::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++,j++)
                 {
                   bigArrI[fullLgth+j]=(*it2).first;
                   bigArrD[fullLgth+j]=(*it2).second;
@@ -396,9 +435,10 @@ void OverlapMapping::unserializationST(int nbOfTrgElems,
 }
 
 /*!
- * This method should be called when all remote matrix with sourceProcId==thisProcId have been retrieved and are in 'this->_the_matrix_st' and 'this->_the_matrix_st_target_proc_id'
- * and 'this->_the_matrix_st_target_ids'.
- * This method finish the job of filling 'this->_the_matrix_st' and 'this->_the_matrix_st_target_proc_id' by putting candidates in 'this->_matrixes_st' into them.
+ * This method should be called when all remote matrix with sourceProcId==thisProcId have been retrieved and are
+ * in 'this->_the_matrix_st' and 'this->_the_matrix_st_target_proc_id' and 'this->_the_matrix_st_target_ids'.
+ * This method finish the job of filling 'this->_the_matrix_st' and 'this->_the_matrix_st_target_proc_id'
+ * by putting candidates in 'this->_matrixes_st' into them (i.e. local computation result).
  */
 void OverlapMapping::finishToFillFinalMatrixST()
 {
@@ -417,64 +457,11 @@ void OverlapMapping::finishToFillFinalMatrixST()
   for(int i=0;i<sz;i++)
     if(_source_proc_id_st[i]!=myProcId)
       {
-        const std::vector<std::map<int,double> >& mat=_matrixes_st[i];
+        const std::vector<SparseDoubleVec >& mat=_matrixes_st[i];
         _the_matrix_st[j]=mat;
         _the_matrix_st_source_proc_id.push_back(_source_proc_id_st[i]);
         j++;
       }
-  _matrixes_st.clear();
-}
-
-/*!
- * This method performs the operation of target ids broadcasting.
- */
-void OverlapMapping::prepareIdsToSendST()
-{
-  CommInterface commInterface=_group.getCommInterface();
-  const MPIProcessorGroup *group=static_cast<const MPIProcessorGroup*>(&_group);
-  const MPI_Comm *comm=group->getComm();
-  int grpSize=_group.size();
-  _source_ids_to_send_st.clear();
-  _source_ids_to_send_st.resize(grpSize);
-  INTERP_KERNEL::AutoPtr<int> nbsend=new int[grpSize];
-  std::fill<int *>(nbsend,nbsend+grpSize,0);
-  for(std::size_t i=0;i<_the_matrix_st_source_proc_id.size();i++)
-    nbsend[_the_matrix_st_source_proc_id[i]]=_the_matrix_st_source_ids[i].size();
-  INTERP_KERNEL::AutoPtr<int> nbrecv=new int[grpSize];
-  commInterface.allToAll(nbsend,1,MPI_INT,nbrecv,1,MPI_INT,*comm);
-  //
-  INTERP_KERNEL::AutoPtr<int> nbsend2=new int[grpSize];
-  std::copy((int *)nbsend,((int *)nbsend)+grpSize,(int *)nbsend2);
-  INTERP_KERNEL::AutoPtr<int> nbsend3=new int[grpSize];
-  nbsend3[0]=0;
-  for(int i=1;i<grpSize;i++)
-    nbsend3[i]=nbsend3[i-1]+nbsend2[i-1];
-  int sendSz=nbsend3[grpSize-1]+nbsend2[grpSize-1];
-  INTERP_KERNEL::AutoPtr<int> bigDataSend=new int[sendSz];
-  for(std::size_t i=0;i<_the_matrix_st_source_proc_id.size();i++)
-    {
-      int offset=nbsend3[_the_matrix_st_source_proc_id[i]];
-      std::copy(_the_matrix_st_source_ids[i].begin(),_the_matrix_st_source_ids[i].end(),((int *)nbsend3)+offset);
-    }
-  INTERP_KERNEL::AutoPtr<int> nbrecv2=new int[grpSize];
-  INTERP_KERNEL::AutoPtr<int> nbrecv3=new int[grpSize];
-  std::copy((int *)nbrecv,((int *)nbrecv)+grpSize,(int *)nbrecv2);
-  nbrecv3[0]=0;
-  for(int i=1;i<grpSize;i++)
-    nbrecv3[i]=nbrecv3[i-1]+nbrecv2[i-1];
-  int recvSz=nbrecv3[grpSize-1]+nbrecv2[grpSize-1];
-  INTERP_KERNEL::AutoPtr<int> bigDataRecv=new int[recvSz];
-  //
-  commInterface.allToAllV(bigDataSend,nbsend2,nbsend3,MPI_INT,
-                          bigDataRecv,nbrecv2,nbrecv3,MPI_INT,
-                          *comm);
-  for(int i=0;i<grpSize;i++)
-    {
-      if(nbrecv2[i]>0)
-        {
-          _source_ids_to_send_st[i].insert(_source_ids_to_send_st[i].end(),((int *)bigDataRecv)+nbrecv3[i],((int *)bigDataRecv)+nbrecv3[i]+nbrecv2[i]);
-        }
-    }
 }
 
 /*!
@@ -499,20 +486,29 @@ void OverlapMapping::multiply(const MEDCouplingFieldDouble *fieldInput, MEDCoupl
   nbsend2[0]=0;
   nbrecv2[0]=0;
   std::vector<double> valsToSend;
+
+  /*
+   * FIELD VALUE XCHGE
+   */
   for(int i=0;i<grpSize;i++)
     {
+      // Prepare field data to be sent/received through a MPI_AllToAllV
       if(std::find(_proc_ids_to_send_vector_st.begin(),_proc_ids_to_send_vector_st.end(),i)!=_proc_ids_to_send_vector_st.end())
         {
-          std::vector<int>::const_iterator isItem1=std::find(_src_proc_st2.begin(),_src_proc_st2.end(),i);
+          std::vector<int>::const_iterator isItem1=std::find(_sent_src_proc_st2.begin(),_sent_src_proc_st2.end(),i);
           MEDCouplingAutoRefCountObjectPtr<DataArrayDouble> vals;
-          if(isItem1!=_src_proc_st2.end())//item1 of step2 main algo
+          if(isItem1!=_sent_src_proc_st2.end()) // source data was sent to proc 'i'
             {
-              int id=std::distance(_src_proc_st2.begin(),isItem1);
-              vals=fieldInput->getArray()->selectByTupleId(_src_ids_st2[id]->getConstPointer(),_src_ids_st2[id]->getConstPointer()+_src_ids_st2[id]->getNumberOfTuples());
+              // Prepare local field data to send to proc i
+              int id=std::distance(_sent_src_proc_st2.begin(),isItem1);
+              vals=fieldInput->getArray()->selectByTupleId(*_sent_src_ids_st2[id]);
             }
-          else
+          else                                  // no source data was sent to proc 'i'
             {//item0 of step2 main algo
-              int id=std::distance(_src_ids_zip_proc_st2.begin(),std::find(_src_ids_zip_proc_st2.begin(),_src_ids_zip_proc_st2.end(),i));
+              std::vector<int>::const_iterator isItem22 = std::find(_src_ids_zip_proc_st2.begin(),_src_ids_zip_proc_st2.end(),i );
+              int id=std::distance(_src_ids_zip_proc_st2.begin(),isItem22);
+              if (isItem22 == _src_ids_zip_proc_st2.end())
+                std::cout << "(" << myProcId << ") has end iterator!!!!!\n";
               vals=fieldInput->getArray()->selectByTupleId(&(_src_ids_zip_st2[id])[0],&(_src_ids_zip_st2[id])[0]+_src_ids_zip_st2[id].size());
             }
           nbsend[i]=vals->getNbOfElems();
@@ -520,8 +516,8 @@ void OverlapMapping::multiply(const MEDCouplingFieldDouble *fieldInput, MEDCoupl
         }
       if(std::find(_proc_ids_to_recv_vector_st.begin(),_proc_ids_to_recv_vector_st.end(),i)!=_proc_ids_to_recv_vector_st.end())
         {
-          std::vector<int>::const_iterator isItem0=std::find(_trg_proc_st2.begin(),_trg_proc_st2.end(),i);
-          if(isItem0==_trg_proc_st2.end())//item1 of step2 main algo [ (0,1) computed on proc1 and Matrix-Vector on proc1 ]
+          std::vector<int>::const_iterator isItem0=std::find(_sent_trg_proc_st2.begin(),_sent_trg_proc_st2.end(),i);
+          if(isItem0==_sent_trg_proc_st2.end())//item1 of step2 main algo [ (0,1) computed on proc1 and Matrix-Vector on proc1 ]
             {
               std::vector<int>::const_iterator it1=std::find(_src_ids_proc_st2.begin(),_src_ids_proc_st2.end(),i);
               if(it1!=_src_ids_proc_st2.end())
@@ -529,12 +525,12 @@ void OverlapMapping::multiply(const MEDCouplingFieldDouble *fieldInput, MEDCoupl
                   int id=std::distance(_src_ids_proc_st2.begin(),it1);
                   nbrecv[i]=_nb_of_src_ids_proc_st2[id]*nbOfCompo;
                 }
-              else if(i==myProcId)
+              else if(i==myProcId)   // diagonal element (i.e. proc #i talking to same proc #i)
                 {
-                  nbrecv[i]=fieldInput->getNumberOfTuplesExpected()*nbOfCompo;
+                  nbrecv[i] = nbsend[i];
                 }
               else
-                throw INTERP_KERNEL::Exception("Plouff ! send email to anthony.geay@cea.fr ! ");
+                throw INTERP_KERNEL::Exception("OverlapMapping::multiply(): Internal error at field values exchange!");
             }
           else
             {//item0 of step2 main algo [ (2,1) computed on proc2 but Matrix-Vector on proc1 ] [(1,0) computed on proc1 but Matrix-Vector on proc0]
@@ -549,8 +545,19 @@ void OverlapMapping::multiply(const MEDCouplingFieldDouble *fieldInput, MEDCoupl
       nbrecv2[i]=nbrecv2[i-1]+nbrecv[i-1];
     }
   INTERP_KERNEL::AutoPtr<double> bigArr=new double[nbrecv2[grpSize-1]+nbrecv[grpSize-1]];
+
+//  scout << "("  << myProcId << ") nbsend :" << nbsend[0] << "," << nbsend[1] << "," << nbsend[2] << "\n";
+//  scout << "("  << myProcId << ") nbrecv :" << nbrecv[0] << "," << nbrecv[1] << "," << nbrecv[2] << "\n";
+//  std::cout << scout.str() << "\n";
+  /*
+   * *********************** ALL-TO-ALL
+   */
   commInterface.allToAllV(&valsToSend[0],nbsend,nbsend2,MPI_DOUBLE,
                           bigArr,nbrecv,nbrecv2,MPI_DOUBLE,*comm);
+  /*
+   *
+   * TARGET FIELD COMPUTATION (matrix-vec computation)
+   */
   fieldOutput->getArray()->fillWithZero();
   INTERP_KERNEL::AutoPtr<double> tmp=new double[nbOfCompo];
   for(int i=0;i<grpSize;i++)
@@ -562,20 +569,23 @@ void OverlapMapping::multiply(const MEDCouplingFieldDouble *fieldInput, MEDCoupl
           if(it==_the_matrix_st_source_proc_id.end())
             throw INTERP_KERNEL::Exception("Big problem !");
           int id=std::distance(_the_matrix_st_source_proc_id.begin(),it);
-          const std::vector< std::map<int,double> >& mat=_the_matrix_st[id];
-          const std::vector< std::map<int,double> >& deno=_the_deno_st[id];
-          std::vector<int>::const_iterator isItem0=std::find(_trg_proc_st2.begin(),_trg_proc_st2.end(),i);
-          if(isItem0==_trg_proc_st2.end())//item1 of step2 main algo [ (0,1) computed on proc1 and Matrix-Vector on proc1 ]
+          const std::vector< SparseDoubleVec >& mat=_the_matrix_st[id];
+          const std::vector< SparseDoubleVec >& deno=_the_deno_st[id];
+          std::vector<int>::const_iterator isItem0=std::find(_sent_trg_proc_st2.begin(),_sent_trg_proc_st2.end(),i);
+          if(isItem0==_sent_trg_proc_st2.end())//item1 of step2 main algo [ (0,1) computed on proc1 and Matrix-Vector on proc1 ]
             {
               int nbOfTrgTuples=mat.size();
               for(int j=0;j<nbOfTrgTuples;j++,pt+=nbOfCompo)
                 {
-                  const std::map<int,double>& mat1=mat[j];
-                  const std::map<int,double>& deno1=deno[j];
-                  std::map<int,double>::const_iterator it4=deno1.begin();
-                  for(std::map<int,double>::const_iterator it3=mat1.begin();it3!=mat1.end();it3++,it4++)
+                  const SparseDoubleVec& mat1=mat[j];
+                  const SparseDoubleVec& deno1=deno[j];
+                  SparseDoubleVec::const_iterator it4=deno1.begin();
+                  for(SparseDoubleVec::const_iterator it3=mat1.begin();it3!=mat1.end();it3++,it4++)
                     {
-                      std::transform(bigArr+nbrecv2[i]+((*it3).first)*nbOfCompo,bigArr+nbrecv2[i]+((*it3).first+1)*(nbOfCompo),(double *)tmp,std::bind2nd(std::multiplies<double>(),(*it3).second/(*it4).second));
+                      std::transform(bigArr+nbrecv2[i]+((*it3).first)*nbOfCompo,
+                                     bigArr+nbrecv2[i]+((*it3).first+1)*(nbOfCompo),
+                                     (double *)tmp,
+                                     std::bind2nd(std::multiplies<double>(),(*it3).second/(*it4).second));
                       std::transform((double *)tmp,(double *)tmp+nbOfCompo,pt,pt,std::plus<double>());
                     }
                 }
@@ -589,21 +599,24 @@ void OverlapMapping::multiply(const MEDCouplingFieldDouble *fieldInput, MEDCoupl
               int newId=0;
               for(std::vector<int>::const_iterator it=zipIds.begin();it!=zipIds.end();it++,newId++)
                 zipCor[*it]=newId;
-              int id2=std::distance(_trg_proc_st2.begin(),std::find(_trg_proc_st2.begin(),_trg_proc_st2.end(),i));
-              const DataArrayInt *tgrIds=_trg_ids_st2[id2];
+              int id2=std::distance(_sent_trg_proc_st2.begin(),std::find(_sent_trg_proc_st2.begin(),_sent_trg_proc_st2.end(),i));
+              const DataArrayInt *tgrIds=_sent_trg_ids_st2[id2];
               const int *tgrIds2=tgrIds->getConstPointer();
               int nbOfTrgTuples=mat.size();
               for(int j=0;j<nbOfTrgTuples;j++)
                 {
-                  const std::map<int,double>& mat1=mat[j];
-                  const std::map<int,double>& deno1=deno[j];
-                  std::map<int,double>::const_iterator it5=deno1.begin();
-                  for(std::map<int,double>::const_iterator it3=mat1.begin();it3!=mat1.end();it3++,it5++)
+                  const SparseDoubleVec& mat1=mat[j];
+                  const SparseDoubleVec& deno1=deno[j];
+                  SparseDoubleVec::const_iterator it5=deno1.begin();
+                  for(SparseDoubleVec::const_iterator it3=mat1.begin();it3!=mat1.end();it3++,it5++)
                     {
                       std::map<int,int>::const_iterator it4=zipCor.find((*it3).first);
                       if(it4==zipCor.end())
-                        throw INTERP_KERNEL::Exception("Hmmmmm send e mail to anthony.geay@cea.fr !");
-                      std::transform(bigArr+nbrecv2[i]+((*it4).second)*nbOfCompo,bigArr+nbrecv2[i]+((*it4).second+1)*(nbOfCompo),(double *)tmp,std::bind2nd(std::multiplies<double>(),(*it3).second/(*it5).second));
+                        throw INTERP_KERNEL::Exception("OverlapMapping::multiply(): Internal error in final value computation!");
+                      std::transform(bigArr+nbrecv2[i]+((*it4).second)*nbOfCompo,
+                                     bigArr+nbrecv2[i]+((*it4).second+1)*(nbOfCompo),
+                                     (double *)tmp,
+                                     std::bind2nd(std::multiplies<double>(),(*it3).second/(*it5).second));
                       std::transform((double *)tmp,(double *)tmp+nbOfCompo,pt+tgrIds2[j]*nbOfCompo,pt+tgrIds2[j]*nbOfCompo,std::plus<double>());
                     }
                 }
@@ -621,11 +634,16 @@ void OverlapMapping::transposeMultiply(const MEDCouplingFieldDouble *fieldInput,
 }
 
 /*!
- * This method should be called immediately after _the_matrix_st has been filled with remote computed matrix put in this proc for Matrix-Vector.
- * This method computes for these matrix the minimal set of source ids corresponding to the source proc id. 
+ * This method should be called immediately after _the_matrix_st has been filled with remote computed matrix
+ * put in this proc for Matrix-Vector.
+ * This method computes for these matrix the minimal set of source ids corresponding to the source proc id.
+ *
  */
 void OverlapMapping::updateZipSourceIdsForFuture()
 {
+  /* When it is called, only the bits received from other processors (i.e. the remotely executed jobs) are in the
+    big matrix _the_matrix_st. */
+
   CommInterface commInterface=_group.getCommInterface();
   int myProcId=_group.myRank();
   int nbOfMatrixRecveived=_the_matrix_st_source_proc_id.size();
@@ -634,20 +652,22 @@ void OverlapMapping::updateZipSourceIdsForFuture()
       int curSrcProcId=_the_matrix_st_source_proc_id[i];
       if(curSrcProcId!=myProcId)
         {
-          const std::vector< std::map<int,double> >& mat=_the_matrix_st[i];
+          const std::vector< SparseDoubleVec >& mat=_the_matrix_st[i];
           _src_ids_zip_proc_st2.push_back(curSrcProcId);
           _src_ids_zip_st2.resize(_src_ids_zip_st2.size()+1);
           std::set<int> s;
-          for(std::vector< std::map<int,double> >::const_iterator it1=mat.begin();it1!=mat.end();it1++)
-            for(std::map<int,double>::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
+          for(std::vector< SparseDoubleVec >::const_iterator it1=mat.begin();it1!=mat.end();it1++)
+            for(SparseDoubleVec::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
               s.insert((*it2).first);
           _src_ids_zip_st2.back().insert(_src_ids_zip_st2.back().end(),s.begin(),s.end());
+
+//          std::stringstream scout;
+//          scout << "(" << myProcId << ") pushed " << _src_ids_zip_st2.back().size() << " values for tgt proc " << curSrcProcId;
+//          std::cout << scout.str() << "\n";
         }
     }
 }
 
-// #include <iostream>
-
 // void OverlapMapping::printTheMatrix() const
 // {
 //   CommInterface commInterface=_group.getCommInterface();
@@ -655,19 +675,55 @@ void OverlapMapping::updateZipSourceIdsForFuture()
 //   const MPI_Comm *comm=group->getComm();
 //   int grpSize=_group.size();
 //   int myProcId=_group.myRank();
-//   std::cerr << "I am proc #" << myProcId << std::endl;
+//   std::stringstream oscerr;
 //   int nbOfMat=_the_matrix_st.size();
-//   std::cerr << "I do manage " << nbOfMat << "matrix : "<< std::endl;
+//   oscerr << "(" <<  myProcId <<  ") I hold " << nbOfMat << " matrix(ces) : "<< std::endl;
 //   for(int i=0;i<nbOfMat;i++)
 //     {
-//       std::cerr << "   - Matrix #" << i << " on source proc #" << _the_matrix_st_source_proc_id[i];
-//       const std::vector< std::map<int,double> >& locMat=_the_matrix_st[i];
-//       for(std::vector< std::map<int,double> >::const_iterator it1=locMat.begin();it1!=locMat.end();it1++)
+//       oscerr << "   - Matrix #" << i << " coming from source proc #" << _the_matrix_st_source_proc_id[i] << ": ";
+//       const std::vector< SparseDoubleVec >& locMat=_the_matrix_st[i];
+//       int j = 0;
+//       for(std::vector< SparseDoubleVec >::const_iterator it1=locMat.begin();it1!=locMat.end();it1++, j++)
 //         {
-//           for(std::map<int,double>::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
-//             std::cerr << "(" << (*it2).first << "," << (*it2).second << "), ";
-//           std::cerr << std::endl;
+//           oscerr << " Target Cell #" << j;
+//           for(SparseDoubleVec::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
+//             oscerr << " (" << (*it2).first << "," << (*it2).second << "), ";
+//           oscerr << std::endl;
 //         }
 //     }
-//   std::cerr << "*********" << std::endl;
+//   oscerr << "*********" << std::endl;
+//
+//   // Hope this will be flushed in one go:
+//   std::cerr << oscerr.str() << std::endl;
+////   if(myProcId != 0)
+////     MPI_Barrier(MPI_COMM_WORLD);
 // }
+//
+// void OverlapMapping::printMatrixesST() const
+//  {
+//    CommInterface commInterface=_group.getCommInterface();
+//    const MPIProcessorGroup *group=static_cast<const MPIProcessorGroup*>(&_group);
+//    const MPI_Comm *comm=group->getComm();
+//    int grpSize=_group.size();
+//    int myProcId=_group.myRank();
+//    std::stringstream oscerr;
+//    int nbOfMat=_matrixes_st.size();
+//    oscerr << "(" <<  myProcId <<  ") I hold " << nbOfMat << " LOCAL matrix(ces) : "<< std::endl;
+//    for(int i=0;i<nbOfMat;i++)
+//      {
+//        oscerr << "   - Matrix #" << i << ": (source proc #" << _source_proc_id_st[i] << " / tgt proc#" << _target_proc_id_st[i] << "):";
+//        const std::vector< SparseDoubleVec >& locMat=_matrixes_st[i];
+//        int j = 0;
+//        for(std::vector< SparseDoubleVec >::const_iterator it1=locMat.begin();it1!=locMat.end();it1++, j++)
+//          {
+//            oscerr << " Target Cell #" << j;
+//            for(SparseDoubleVec::const_iterator it2=(*it1).begin();it2!=(*it1).end();it2++)
+//              oscerr << " (" << (*it2).first << "," << (*it2).second << "), ";
+//            oscerr << std::endl;
+//          }
+//      }
+//    oscerr << "*********" << std::endl;
+//
+//    // Hope this will be flushed in one go:
+//    std::cerr << oscerr.str() << std::endl;
+//  }
index cfb06b1bbb62e8cd4784a5968445876633d5ba30..2a5b32e4bb82ffa7595cf1974f2a5a9c7daf9b69 100644 (file)
@@ -32,7 +32,9 @@ namespace ParaMEDMEM
   class DataArrayInt;
   class MEDCouplingFieldDouble;
 
-  /*
+  typedef std::map<int,double> SparseDoubleVec;
+
+  /*!
    * Internal class, not part of the public API.
    *
    * Used by the impl of OverlapInterpolationMatrix, plays an equivalent role than what the NxM_Mapping
@@ -42,17 +44,19 @@ namespace ParaMEDMEM
   class OverlapMapping
   {
   public:
+
     OverlapMapping(const ProcessorGroup& group);
     void keepTracksOfSourceIds(int procId, DataArrayInt *ids);
     void keepTracksOfTargetIds(int procId, DataArrayInt *ids);
-    void addContributionST(const std::vector< std::map<int,double> >& matrixST, const DataArrayInt *srcIds, int srcProcId, const DataArrayInt *trgIds, int trgProcId);
-    void prepare(const std::vector< std::vector<int> >& procsInInteraction, int nbOfTrgElems);
+    void addContributionST(const std::vector< SparseDoubleVec >& matrixST, const DataArrayInt *srcIds, int srcProcId, const DataArrayInt *trgIds, int trgProcId);
+    void prepare(const std::vector< int >& procsToSendField, int nbOfTrgElems);
     void computeDenoConservativeVolumic(int nbOfTuplesTrg);
     void computeDenoGlobConstraint();
     //
     void multiply(const MEDCouplingFieldDouble *fieldInput, MEDCouplingFieldDouble *fieldOutput) const;
     void transposeMultiply(const MEDCouplingFieldDouble *fieldInput, MEDCouplingFieldDouble *fieldOutput);
   private:
+    void fillProcToSendRcvForMultiply(const std::vector< int >& procsToSendField);
     void serializeMatrixStep0ST(const int *nbOfElemsSrc, int *&bigArr, int *count, int *offsets,
                                 int *countForRecv, int *offsetsForRecv) const;
     int serializeMatrixStep1ST(const int *nbOfElemsSrc, const int *recvStep0, const int *countStep0, const int *offsStep0,
@@ -61,36 +65,65 @@ namespace ParaMEDMEM
     void unserializationST(int nbOfTrgElems, const int *nbOfElemsSrcPerProc, const int *bigArrRecv, const int *bigArrRecvCounts, const int *bigArrRecvOffs,
                            const int *bigArrRecv2, const double *bigArrDRecv2, const int *bigArrRecv2Count, const int *bigArrRecv2Offs);
     void finishToFillFinalMatrixST();
-    void prepareIdsToSendST();
     void updateZipSourceIdsForFuture();
-    //void printTheMatrix() const;
+
+    // Debug
+//    void printMatrixesST() const;
+//    void printTheMatrix() const;
   private:
     const ProcessorGroup &_group;
-    //! vector of ids
-    std::vector< MEDCouplingAutoRefCountObjectPtr<DataArrayInt> > _src_ids_st2;//item #1
-    std::vector< int > _src_proc_st2;//item #1
-    std::vector< MEDCouplingAutoRefCountObjectPtr<DataArrayInt> > _trg_ids_st2;//item #0
-    std::vector< int > _trg_proc_st2;//item #0
-    std::vector< int > _nb_of_src_ids_proc_st2;//item #1
-    std::vector< int > _src_ids_proc_st2;//item #1
-    std::vector< std::vector<int> > _src_ids_zip_st2;//same size as _src_ids_zip_proc_st2. Sorted. specifies for each id the corresponding ids to send. This is for item0 of Step2 of main algorithm
-    std::vector< int > _src_ids_zip_proc_st2;
-    //! vector of matrixes the first entry correspond to source proc id in _source_ids_st
-    std::vector< std::vector< std::map<int,double> > > _matrixes_st;
-    std::vector< std::vector<int> > _source_ids_st;
+    /**! Vector of DAInt of cell identifiers. The 2 following class members work in pair. For a proc ID i,
+     * first member gives an old2new map for the local part of the source mesh that has been sent.
+     * Second member gives proc ID.  */
+    std::vector< MEDCouplingAutoRefCountObjectPtr<DataArrayInt> > _sent_src_ids_st2;
+    //! see above _sent_src_ids_st2
+    std::vector< int > _sent_src_proc_st2;
+
+    //! See _src_ids_st2 and _sent_src_proc_st2. Same for target mesh.
+    std::vector< MEDCouplingAutoRefCountObjectPtr<DataArrayInt> > _sent_trg_ids_st2;
+    //! See _src_ids_st2 and _sent_src_proc_st2. Same for target mesh.
+    std::vector< int > _sent_trg_proc_st2;
+
+
+    /**! Vector of matrixes (partial interpolation ratios), result of the local interpolator run.
+     * Indexing shared with _source_proc_id_st, and _target_proc_id_st.   */
+    std::vector< std::vector< SparseDoubleVec > > _matrixes_st;
+    //! See _matrixes_st - vec of source proc IDs
     std::vector< int > _source_proc_id_st;
-    std::vector< std::vector<int> > _target_ids_st;
+    //! See _matrixes_st - vec of target proc IDs
     std::vector< int > _target_proc_id_st;
-    //! the matrix for matrix-vector product. The first dimension the set of target procs that interacts with local source mesh. The second dimension correspond to nb of local source ids. 
-    std::vector< std::vector< std::map<int,double> > > _the_matrix_st;
+
+    //! Vector of remote remote proc IDs for source mesh. Indexing shared with _nb_of_src_ids_proc_st2
+    std::vector< int > _src_ids_proc_st2;
+    //! Number of cells in the mesh/mapping received from the remote proc i for source mesh. See _src_ids_proc_st2 above
+    std::vector< int > _nb_of_src_ids_proc_st2;
+
+    /**! Specifies for each remote proc ID (given in _src_ids_zip_proc_st2 below) the corresponding local
+     * source cell IDs to use/send. Same indexing as _src_ids_zip_proc_st2. Sorted.
+     * On a given proc, those two members contain exactly the same set of cell identifiers as what is given
+     * in the locally held interpolation matrices.   */
+    std::vector< std::vector<int> > _src_ids_zip_st2;
+    //! Vector of remote proc ID to which the local source mapping above corresponds. See _src_ids_zip_st2 above.
+    std::vector< int > _src_ids_zip_proc_st2;
+
+    /**! THE matrix for matrix-vector product. The first dimension is indexed in the set of target procs
+    * that interacts with local source mesh. The second dim is the pseudo id of source proc.
+    * Same indexing as _the_matrix_st_source_proc_id  */
+    std::vector< std::vector< SparseDoubleVec > > _the_matrix_st;
+    //! See _the_matrix_st above. List of source proc IDs contributing to _the_matrix_st
     std::vector< int > _the_matrix_st_source_proc_id;
-    std::vector< std::vector<int> > _the_matrix_st_source_ids;
-    std::vector< std::vector< std::map<int,double> > > _the_deno_st;
-    //! this attribute stores the proc ids that wait for data from this proc ids for matrix-vector computation
+
+    //! Proc IDs to which data will be sent (originating this current proc) for matrix-vector computation
     std::vector< int > _proc_ids_to_send_vector_st;
+    //! Proc IDs from which data will be received (on this current proc) for matrix-vector computation
     std::vector< int > _proc_ids_to_recv_vector_st;
-    //! this attribute is of size _group.size(); for each procId in _group _source_ids_to_send_st[procId] contains tupleId to send abroad
-    std::vector< std::vector<int> > _source_ids_to_send_st;
+
+    // Denominators (computed from the numerator matrix)
+    std::vector< std::vector< SparseDoubleVec > > _the_deno_st;
+
+//    std::vector< std::vector<int> > _the_matrix_st_source_ids;
+//    //! this attribute is of size _group.size(); for each procId in _group _source_ids_to_send_st[procId] contains tupleId to send abroad
+//    std::vector< std::vector<int> > _source_ids_to_send_st;
   };
 }
 
index 513031360fedcdf7dc6f355262594814c46caf58..4d021f565cef11aa669e06135ee13b37e2082aed 100644 (file)
@@ -68,7 +68,7 @@ SET(ParaMEDMEMTest_SOURCES
 
 ADD_LIBRARY(ParaMEDMEMTest SHARED ${ParaMEDMEMTest_SOURCES})
 SET_TARGET_PROPERTIES(ParaMEDMEMTest PROPERTIES COMPILE_FLAGS "")
-TARGET_LINK_LIBRARIES(ParaMEDMEMTest paramedmem paramedloader ${CPPUNIT_LIBRARIES})
+TARGET_LINK_LIBRARIES(ParaMEDMEMTest paramedmem paramedloader medcouplingremapper ${CPPUNIT_LIBRARIES})
 INSTALL(TARGETS ParaMEDMEMTest DESTINATION ${SALOME_INSTALL_LIBS})
 
 SET(TESTSParaMEDMEM)
index a8bf2b474dfbd4128f2798764dc313f1f431f244..54db5e2e037fd8fcb960d9989543e60af4c8d755 100644 (file)
@@ -48,7 +48,10 @@ class ParaMEDMEMTest : public CppUnit::TestFixture
   CPPUNIT_TEST(testInterpKernelDECPartialProcs);
   CPPUNIT_TEST(testInterpKernelDEC3DSurfEmptyBBox);
   CPPUNIT_TEST(testOverlapDEC1);
-
+  CPPUNIT_TEST(testOverlapDEC2);
+//    CPPUNIT_TEST(testOverlapDEC_LMEC_seq);
+//    CPPUNIT_TEST(testOverlapDEC_LMEC_para);
+//
   CPPUNIT_TEST(testSynchronousEqualInterpKernelWithoutInterpNativeDEC_2D);
   CPPUNIT_TEST(testSynchronousEqualInterpKernelWithoutInterpDEC_2D);
   CPPUNIT_TEST(testSynchronousEqualInterpKernelDEC_2D);
@@ -61,11 +64,11 @@ class ParaMEDMEMTest : public CppUnit::TestFixture
   CPPUNIT_TEST(testAsynchronousSlowerSourceInterpKernelDEC_2D);
   CPPUNIT_TEST(testAsynchronousSlowSourceInterpKernelDEC_2D);
   CPPUNIT_TEST(testAsynchronousFastSourceInterpKernelDEC_2D);
-#ifdef MED_ENABLE_FVM
-  //can be added again after FVM correction for 2D
-  //  CPPUNIT_TEST(testNonCoincidentDEC_2D);
-  CPPUNIT_TEST(testNonCoincidentDEC_3D);
-#endif
+//#ifdef MED_ENABLE_FVM
+//  //can be added again after FVM correction for 2D
+//  //  CPPUNIT_TEST(testNonCoincidentDEC_2D);
+//  CPPUNIT_TEST(testNonCoincidentDEC_3D);
+//#endif
   CPPUNIT_TEST(testStructuredCoincidentDEC);
   CPPUNIT_TEST(testStructuredCoincidentDEC);
   CPPUNIT_TEST(testICoco1);
@@ -104,6 +107,9 @@ public:
   void testInterpKernelDECPartialProcs();
   void testInterpKernelDEC3DSurfEmptyBBox();
   void testOverlapDEC1();
+  void testOverlapDEC2();
+  void testOverlapDEC_LMEC_seq();
+  void testOverlapDEC_LMEC_para();
 #ifdef MED_ENABLE_FVM
   void testNonCoincidentDEC_2D();
   void testNonCoincidentDEC_3D();
@@ -155,6 +161,7 @@ private:
   void testInterpKernelDEC_2D_(const char *srcMeth, const char *targetMeth);
   void testInterpKernelDEC2_2D_(const char *srcMeth, const char *targetMeth);
   void testInterpKernelDEC_3D_(const char *srcMeth, const char *targetMeth);
+
 };
 
 // to automatically remove temporary files from disk
index cc97ede180e7d82f648bd7e4e86e33ec21230a7e..e11b5a944854007101976b24df0c1363a7df4acb 100644 (file)
@@ -249,6 +249,7 @@ void ParaMEDMEMTest::testGauthier1()
 
 void ParaMEDMEMTest::testGauthier2()
 {
+  std::cout << "testGauthier2\n";
   double valuesExpected1[2]={0.,0.};
   double valuesExpected2[2]={0.95,0.970625};
   
index c7a6104619bb4c25f2ebe83b17102e96d56fa274..c1f5bb92f5d4ed86908cb3b612343ef0c7c503a6 100644 (file)
 
 #include <set>
 
-void ParaMEDMEMTest::testOverlapDEC1()
-{
-  std::string srcM("P0");
-  std::string targetM("P0");
-  int size;
-  int rank;
-  MPI_Comm_size(MPI_COMM_WORLD,&size);
-  MPI_Comm_rank(MPI_COMM_WORLD,&rank);
+using namespace std;
 
-  if (size != 3) return ;
-   
-  int nproc = 3;
-  std::set<int> procs;
-  
-  for (int i=0; i<nproc; i++)
-    procs.insert(i);
-  
-  ParaMEDMEM::CommInterface interface;
-
-  ParaMEDMEM::OverlapDEC dec(procs);
-
-  ParaMEDMEM::MEDCouplingUMesh* meshS=0;
-  ParaMEDMEM::MEDCouplingUMesh* meshT=0;
-  ParaMEDMEM::ParaMESH* parameshS=0;
-  ParaMEDMEM::ParaMESH* parameshT=0;
-  ParaMEDMEM::ParaFIELD* parafieldS=0;
-  ParaMEDMEM::ParaFIELD* parafieldT=0;
-  
-  MPI_Barrier(MPI_COMM_WORLD);
+#include "MEDCouplingAutoRefCountObjectPtr.hxx"
+#include "MEDLoader.hxx"
+#include "MEDLoaderBase.hxx"
+#include "MEDCouplingFieldDouble.hxx"
+#include "MEDCouplingMemArray.hxx"
+#include "MEDCouplingRemapper.hxx"
+
+using namespace ParaMEDMEM;
+
+typedef  MEDCouplingAutoRefCountObjectPtr<MEDCouplingUMesh> MUMesh;
+typedef  MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> MFDouble;
+
+//void ParaMEDMEMTest::testOverlapDEC_LMEC_seq()
+//{
+//  //  T_SC_Trio_src.med  -- "SupportOf_"
+//  //  T_SC_Trio_dst.med  -- "SupportOf_T_SC_Trio"
+//  //  h_TH_Trio_src.med  -- "SupportOf_"
+//  //  h_TH_Trio_dst.med  -- "SupportOf_h_TH_Trio"
+//  string rep("/export/home/adrien/support/antoine_LMEC/");
+//  string src_mesh_nam(rep + string("T_SC_Trio_src.med"));
+//  string tgt_mesh_nam(rep + string("T_SC_Trio_dst.med"));
+////  string src_mesh_nam(rep + string("h_TH_Trio_src.med"));
+////  string tgt_mesh_nam(rep + string("h_TH_Trio_dst.med"));
+//  MUMesh src_mesh=MEDLoader::ReadUMeshFromFile(src_mesh_nam,"SupportOf_",0);
+//  MUMesh tgt_mesh=MEDLoader::ReadUMeshFromFile(tgt_mesh_nam,"SupportOf_T_SC_Trio",0);
+////  MUMesh tgt_mesh=MEDLoader::ReadUMeshFromFile(tgt_mesh_nam,"SupportOf_h_TH_Trio",0);
+//
+//  MFDouble srcField = MEDCouplingFieldDouble::New(ON_CELLS, ONE_TIME);
+//  srcField->setMesh(src_mesh);
+//  DataArrayDouble * dad = DataArrayDouble::New(); dad->alloc(src_mesh->getNumberOfCells(),1);
+//  dad->fillWithValue(1.0);
+//  srcField->setArray(dad);
+//  srcField->setNature(ConservativeVolumic);
+//
+//  MEDCouplingRemapper remap;
+//  remap.setOrientation(2); // always consider surface intersections as absolute areas.
+//  remap.prepare(src_mesh, tgt_mesh, "P0P0");
+//  MFDouble tgtField = remap.transferField(srcField, 1.0e+300);
+//  tgtField->setName("result");
+//  string out_nam(rep + string("adrien.med"));
+//  MEDLoader::WriteField(out_nam,tgtField, true);
+//  cout << "wrote: " << out_nam << "\n";
+//  double integ1 = 0.0, integ2 = 0.0;
+//  srcField->integral(true, &integ1);
+//  tgtField->integral(true, &integ2);
+////  tgtField->reprQuickOverview(cout);
+//  CPPUNIT_ASSERT_DOUBLES_EQUAL(integ1,integ2,1e-8);
+//
+//  dad->decrRef();
+//}
+//
+//void ParaMEDMEMTest::testOverlapDEC_LMEC_para()
+//{
+//  using namespace ParaMEDMEM;
+//
+//  int size;
+//  int rank;
+//  MPI_Comm_size(MPI_COMM_WORLD,&size);
+//  MPI_Comm_rank(MPI_COMM_WORLD,&rank);
+//
+//  if (size != 1) return ;
+//
+//  int nproc = 1;
+//  std::set<int> procs;
+//
+//  for (int i=0; i<nproc; i++)
+//    procs.insert(i);
+//
+//  CommInterface interface;
+//  OverlapDEC dec(procs);
+//
+//  ParaMESH* parameshS=0;
+//  ParaMESH* parameshT=0;
+//  ParaFIELD* parafieldS=0;
+//  ParaFIELD* parafieldT=0;
+//  MFDouble srcField;
+//
+//  // **** FILE LOADING
+//  //  T_SC_Trio_src.med  -- "SupportOf_"
+//  //  T_SC_Trio_dst.med  -- "SupportOf_T_SC_Trio"
+//  //  h_TH_Trio_src.med  -- "SupportOf_"
+//  //  h_TH_Trio_dst.med  -- "SupportOf_h_TH_Trio"
+//  string rep("/export/home/adrien/support/antoine_LMEC/");
+//  string src_mesh_nam(rep + string("T_SC_Trio_src.med"));
+//  string tgt_mesh_nam(rep + string("T_SC_Trio_dst.med"));
+//
+//
+//  MPI_Barrier(MPI_COMM_WORLD);
+//  if(rank==0)
+//    {
+//    //  string src_mesh_nam(rep + string("h_TH_Trio_src.med"));
+//    //  string tgt_mesh_nam(rep + string("h_TH_Trio_dst.med"));
+//      MUMesh src_mesh=MEDLoader::ReadUMeshFromFile(src_mesh_nam,"SupportOf_",0);
+//      MUMesh tgt_mesh=MEDLoader::ReadUMeshFromFile(tgt_mesh_nam,"SupportOf_T_SC_Trio",0);
+//    //  MUMesh tgt_mesh=MEDLoader::ReadUMeshFromFile(tgt_mesh_nam,"SupportOf_h_TH_Trio",0);
+//
+//      // **** SOURCE
+//      srcField = MEDCouplingFieldDouble::New(ON_CELLS, ONE_TIME);
+//      srcField->setMesh(src_mesh);
+//      DataArrayDouble * dad = DataArrayDouble::New(); dad->alloc(src_mesh->getNumberOfCells(),1);
+//      dad->fillWithValue(1.0);
+//      srcField->setArray(dad);
+//      srcField->setNature(ConservativeVolumic);
+//
+//      ComponentTopology comptopo;
+//      parameshS = new ParaMESH(src_mesh,*dec.getGroup(),"source mesh");
+//      parafieldS = new ParaFIELD(ON_CELLS,ONE_TIME,parameshS,comptopo);
+//      parafieldS->getField()->setNature(ConservativeVolumic);//IntegralGlobConstraint
+//      parafieldS->getField()->setArray(dad);
+//
+//      // **** TARGET
+//      parameshT=new ParaMESH(tgt_mesh,*dec.getGroup(),"target mesh");
+//      parafieldT=new ParaFIELD(ON_CELLS,ONE_TIME,parameshT,comptopo);
+//      parafieldT->getField()->setNature(ConservativeVolumic);//IntegralGlobConstraint
+//      parafieldT->getField()->getArray()->fillWithValue(1.0e300);
+////      valsT[0]=7.;
+//    }
+//  dec.setOrientation(2);
+//  dec.attachSourceLocalField(parafieldS);
+//  dec.attachTargetLocalField(parafieldT);
+//  dec.synchronize();
+//  dec.sendRecvData(true);
+//  //
+//  if(rank==0)
+//    {
+//      double integ1 = 0.0, integ2 = 0.0;
+//      MEDCouplingFieldDouble * tgtField;
+//
+//      srcField->integral(true, &integ1);
+//      tgtField = parafieldT->getField();
+////      tgtField->reprQuickOverview(cout);
+//      tgtField->integral(true, &integ2);
+//      tgtField->setName("result");
+//      string out_nam(rep + string("adrien_para.med"));
+//      MEDLoader::WriteField(out_nam,tgtField, true);
+//      cout << "wrote: " << out_nam << "\n";
+//      CPPUNIT_ASSERT_DOUBLES_EQUAL(integ1,integ2,1e-8);
+//    }
+//  delete parafieldS;
+//  delete parafieldT;
+//  delete parameshS;
+//  delete parameshT;
+//
+//  MPI_Barrier(MPI_COMM_WORLD);
+//}
+
+void prepareData1(int rank, ProcessorGroup * grp,
+                                  MEDCouplingUMesh *& meshS, MEDCouplingUMesh *& meshT,
+                                  ParaMESH*& parameshS, ParaMESH*& parameshT,
+                                  ParaFIELD*& parafieldS, ParaFIELD*& parafieldT)
+{
   if(rank==0)
     {
       const double coordsS[10]={0.,0.,0.5,0.,1.,0.,0.,0.5,0.5,0.5};
       const double coordsT[6]={0.,0.,1.,0.,1.,1.};
-      meshS=ParaMEDMEM::MEDCouplingUMesh::New();
+      meshS=MEDCouplingUMesh::New();
       meshS->setMeshDimension(2);
-      ParaMEDMEM::DataArrayDouble *myCoords=ParaMEDMEM::DataArrayDouble::New();
+      DataArrayDouble *myCoords=DataArrayDouble::New();
       myCoords->alloc(5,2);
       std::copy(coordsS,coordsS+10,myCoords->getPointer());
       meshS->setCoords(myCoords);
@@ -78,16 +202,16 @@ void ParaMEDMEMTest::testOverlapDEC1()
       meshS->insertNextCell(INTERP_KERNEL::NORM_QUAD4,4,connS);
       meshS->insertNextCell(INTERP_KERNEL::NORM_TRI3,3,connS+4);
       meshS->finishInsertingCells();
-      ParaMEDMEM::ComponentTopology comptopo;
-      parameshS=new ParaMEDMEM::ParaMESH(meshS,*dec.getGrp(),"source mesh");
-      parafieldS=new ParaMEDMEM::ParaFIELD(ParaMEDMEM::ON_CELLS,ParaMEDMEM::NO_TIME,parameshS,comptopo);
-      parafieldS->getField()->setNature(ParaMEDMEM::ConservativeVolumic);//IntegralGlobConstraint
+      ComponentTopology comptopo;
+      parameshS=new ParaMESH(meshS, *grp,"source mesh");
+      parafieldS=new ParaFIELD(ON_CELLS,NO_TIME,parameshS,comptopo);
+      parafieldS->getField()->setNature(ConservativeVolumic);//IntegralGlobConstraint
       double *valsS=parafieldS->getField()->getArray()->getPointer();
       valsS[0]=7.; valsS[1]=8.;
       //
-      meshT=ParaMEDMEM::MEDCouplingUMesh::New();
+      meshT=MEDCouplingUMesh::New();
       meshT->setMeshDimension(2);
-      myCoords=ParaMEDMEM::DataArrayDouble::New();
+      myCoords=DataArrayDouble::New();
       myCoords->alloc(3,2);
       std::copy(coordsT,coordsT+6,myCoords->getPointer());
       meshT->setCoords(myCoords);
@@ -96,9 +220,9 @@ void ParaMEDMEMTest::testOverlapDEC1()
       meshT->allocateCells(1);
       meshT->insertNextCell(INTERP_KERNEL::NORM_TRI3,3,connT);
       meshT->finishInsertingCells();
-      parameshT=new ParaMEDMEM::ParaMESH(meshT,*dec.getGrp(),"target mesh");
-      parafieldT=new ParaMEDMEM::ParaFIELD(ParaMEDMEM::ON_CELLS,ParaMEDMEM::NO_TIME,parameshT,comptopo);
-      parafieldT->getField()->setNature(ParaMEDMEM::ConservativeVolumic);//IntegralGlobConstraint
+      parameshT=new ParaMESH(meshT,*grp,"target mesh");
+      parafieldT=new ParaFIELD(ON_CELLS,NO_TIME,parameshT,comptopo);
+      parafieldT->getField()->setNature(ConservativeVolumic);//IntegralGlobConstraint
       double *valsT=parafieldT->getField()->getArray()->getPointer();
       valsT[0]=7.;
     }
@@ -107,9 +231,9 @@ void ParaMEDMEMTest::testOverlapDEC1()
     {
       const double coordsS[10]={1.,0.,0.5,0.5,1.,0.5,0.5,1.,1.,1.};
       const double coordsT[6]={0.,0.,0.5,0.5,0.,1.};
-      meshS=ParaMEDMEM::MEDCouplingUMesh::New();
+      meshS=MEDCouplingUMesh::New();
       meshS->setMeshDimension(2);
-      ParaMEDMEM::DataArrayDouble *myCoords=ParaMEDMEM::DataArrayDouble::New();
+      DataArrayDouble *myCoords=DataArrayDouble::New();
       myCoords->alloc(5,2);
       std::copy(coordsS,coordsS+10,myCoords->getPointer());
       meshS->setCoords(myCoords);
@@ -119,16 +243,17 @@ void ParaMEDMEMTest::testOverlapDEC1()
       meshS->insertNextCell(INTERP_KERNEL::NORM_TRI3,3,connS);
       meshS->insertNextCell(INTERP_KERNEL::NORM_QUAD4,4,connS+3);
       meshS->finishInsertingCells();
-      ParaMEDMEM::ComponentTopology comptopo;
-      parameshS=new ParaMEDMEM::ParaMESH(meshS,*dec.getGrp(),"source mesh");
-      parafieldS=new ParaMEDMEM::ParaFIELD(ParaMEDMEM::ON_CELLS,ParaMEDMEM::NO_TIME,parameshS,comptopo);
-      parafieldS->getField()->setNature(ParaMEDMEM::ConservativeVolumic);//IntegralGlobConstraint
+      ComponentTopology comptopo;
+      parameshS=new ParaMESH(meshS,*grp,"source mesh");
+      parafieldS=new ParaFIELD(ON_CELLS,NO_TIME,parameshS,comptopo);
+      parafieldS->getField()->setNature(ConservativeVolumic);//IntegralGlobConstraint
       double *valsS=parafieldS->getField()->getArray()->getPointer();
-      valsS[0]=9.; valsS[1]=11.;
+      valsS[0]=9.;
+      valsS[1]=11.;
       //
-      meshT=ParaMEDMEM::MEDCouplingUMesh::New();
+      meshT=MEDCouplingUMesh::New();
       meshT->setMeshDimension(2);
-      myCoords=ParaMEDMEM::DataArrayDouble::New();
+      myCoords=DataArrayDouble::New();
       myCoords->alloc(3,2);
       std::copy(coordsT,coordsT+6,myCoords->getPointer());
       meshT->setCoords(myCoords);
@@ -137,9 +262,9 @@ void ParaMEDMEMTest::testOverlapDEC1()
       meshT->allocateCells(1);
       meshT->insertNextCell(INTERP_KERNEL::NORM_TRI3,3,connT);
       meshT->finishInsertingCells();
-      parameshT=new ParaMEDMEM::ParaMESH(meshT,*dec.getGrp(),"target mesh");
-      parafieldT=new ParaMEDMEM::ParaFIELD(ParaMEDMEM::ON_CELLS,ParaMEDMEM::NO_TIME,parameshT,comptopo);
-      parafieldT->getField()->setNature(ParaMEDMEM::ConservativeVolumic);//IntegralGlobConstraint
+      parameshT=new ParaMESH(meshT,*grp,"target mesh");
+      parafieldT=new ParaFIELD(ON_CELLS,NO_TIME,parameshT,comptopo);
+      parafieldT->getField()->setNature(ConservativeVolumic);//IntegralGlobConstraint
       double *valsT=parafieldT->getField()->getArray()->getPointer();
       valsT[0]=8.;
     }
@@ -148,9 +273,9 @@ void ParaMEDMEMTest::testOverlapDEC1()
     {
       const double coordsS[8]={0.,0.5, 0.5,0.5, 0.,1., 0.5,1.};
       const double coordsT[6]={0.5,0.5,0.,1.,1.,1.};
-      meshS=ParaMEDMEM::MEDCouplingUMesh::New();
+      meshS=MEDCouplingUMesh::New();
       meshS->setMeshDimension(2);
-      ParaMEDMEM::DataArrayDouble *myCoords=ParaMEDMEM::DataArrayDouble::New();
+      DataArrayDouble *myCoords=DataArrayDouble::New();
       myCoords->alloc(4,2);
       std::copy(coordsS,coordsS+8,myCoords->getPointer());
       meshS->setCoords(myCoords);
@@ -159,16 +284,16 @@ void ParaMEDMEMTest::testOverlapDEC1()
       meshS->allocateCells(1);
       meshS->insertNextCell(INTERP_KERNEL::NORM_QUAD4,4,connS);
       meshS->finishInsertingCells();
-      ParaMEDMEM::ComponentTopology comptopo;
-      parameshS=new ParaMEDMEM::ParaMESH(meshS,*dec.getGrp(),"source mesh");
-      parafieldS=new ParaMEDMEM::ParaFIELD(ParaMEDMEM::ON_CELLS,ParaMEDMEM::NO_TIME,parameshS,comptopo);
-      parafieldS->getField()->setNature(ParaMEDMEM::ConservativeVolumic);//IntegralGlobConstraint
+      ComponentTopology comptopo;
+      parameshS=new ParaMESH(meshS,*grp,"source mesh");
+      parafieldS=new ParaFIELD(ON_CELLS,NO_TIME,parameshS,comptopo);
+      parafieldS->getField()->setNature(ConservativeVolumic);//IntegralGlobConstraint
       double *valsS=parafieldS->getField()->getArray()->getPointer();
       valsS[0]=10.;
       //
-      meshT=ParaMEDMEM::MEDCouplingUMesh::New();
+      meshT=MEDCouplingUMesh::New();
       meshT->setMeshDimension(2);
-      myCoords=ParaMEDMEM::DataArrayDouble::New();
+      myCoords=DataArrayDouble::New();
       myCoords->alloc(3,2);
       std::copy(coordsT,coordsT+6,myCoords->getPointer());
       meshT->setCoords(myCoords);
@@ -177,12 +302,112 @@ void ParaMEDMEMTest::testOverlapDEC1()
       meshT->allocateCells(1);
       meshT->insertNextCell(INTERP_KERNEL::NORM_TRI3,3,connT);
       meshT->finishInsertingCells();
-      parameshT=new ParaMEDMEM::ParaMESH(meshT,*dec.getGrp(),"target mesh");
-      parafieldT=new ParaMEDMEM::ParaFIELD(ParaMEDMEM::ON_CELLS,ParaMEDMEM::NO_TIME,parameshT,comptopo);
-      parafieldT->getField()->setNature(ParaMEDMEM::ConservativeVolumic);//IntegralGlobConstraint
+      parameshT=new ParaMESH(meshT,*grp,"target mesh");
+      parafieldT=new ParaFIELD(ON_CELLS,NO_TIME,parameshT,comptopo);
+      parafieldT->getField()->setNature(ConservativeVolumic);//IntegralGlobConstraint
       double *valsT=parafieldT->getField()->getArray()->getPointer();
       valsT[0]=9.;
     }
+
+}
+
+/*! Test case from the official doc of the OverlapDEC.
+ *  WARNING: bounding boxes are tweaked here to make the case more interesting (i.e. to avoid an all to all exchange
+ *  between all procs).
+ */
+void ParaMEDMEMTest::testOverlapDEC1()
+{
+  int size, rank;
+  MPI_Comm_size(MPI_COMM_WORLD,&size);
+  MPI_Comm_rank(MPI_COMM_WORLD,&rank);
+  //  char hostname[256];
+  //  printf("(%d) PID %d on localhost ready for attach\n", rank, getpid());
+  //  fflush(stdout);
+
+  if (size != 3) return ;
+
+  int nproc = 3;
+  std::set<int> procs;
+
+  for (int i=0; i<nproc; i++)
+    procs.insert(i);
+
+  CommInterface interface;
+  OverlapDEC dec(procs);
+  ProcessorGroup * grp = dec.getGroup();
+  MEDCouplingUMesh* meshS=0, *meshT=0;
+  ParaMESH* parameshS=0, *parameshT=0;
+  ParaFIELD* parafieldS=0, *parafieldT=0;
+
+  MPI_Barrier(MPI_COMM_WORLD);
+  prepareData1(rank, grp, meshS, meshT, parameshS, parameshT, parafieldS, parafieldT);
+
+  /*!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   *  HACK ON BOUNDING BOX TO MAKE THIS CASE SIMPLE AND USABLE IN DEBUG
+   * Bounding boxes are slightly smaller than should be thus localising the work to be done
+   * and avoiding every proc talking to everyone else.
+   * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   */
+  dec.setBoundingBoxAdjustmentAbs(-1.0e-12);
+
+  dec.attachSourceLocalField(parafieldS);
+  dec.attachTargetLocalField(parafieldT);
+  dec.synchronize();
+  dec.sendRecvData(true);
+  //
+  if(rank==0)
+    {
+      CPPUNIT_ASSERT_DOUBLES_EQUAL(8.75,parafieldT->getField()->getArray()->getIJ(0,0),1e-12);
+    }
+  if(rank==1)
+    {
+      CPPUNIT_ASSERT_DOUBLES_EQUAL(8.5,parafieldT->getField()->getArray()->getIJ(0,0),1e-12);
+    }
+  if(rank==2)
+    {
+      CPPUNIT_ASSERT_DOUBLES_EQUAL(10.5,parafieldT->getField()->getArray()->getIJ(0,0),1e-12);
+    }
+  delete parafieldS;
+  delete parafieldT;
+  delete parameshS;
+  delete parameshT;
+  meshS->decrRef();
+  meshT->decrRef();
+
+  MPI_Barrier(MPI_COMM_WORLD);
+}
+
+/*!
+ * Same as testOverlapDEC1() but with regular bounding boxes. If you're looking for a nice debug case,
+ * testOverlapDEC1() is more appropriate.
+ */
+void ParaMEDMEMTest::testOverlapDEC2()
+{
+  int size, rank;
+  MPI_Comm_size(MPI_COMM_WORLD,&size);
+  MPI_Comm_rank(MPI_COMM_WORLD,&rank);
+
+  if (size != 3) return ;
+
+  int nproc = 3;
+  std::set<int> procs;
+
+  for (int i=0; i<nproc; i++)
+    procs.insert(i);
+
+  CommInterface interface;
+  OverlapDEC dec(procs);
+  ProcessorGroup * grp = dec.getGroup();
+  MEDCouplingUMesh* meshS=0, *meshT=0;
+  ParaMESH* parameshS=0, *parameshT=0;
+  ParaFIELD* parafieldS=0, *parafieldT=0;
+
+  MPI_Barrier(MPI_COMM_WORLD);
+  prepareData1(rank, grp, meshS, meshT, parameshS, parameshT, parafieldS, parafieldT);
+
+  /* Normal bounding boxes here: */
+  dec.setBoundingBoxAdjustmentAbs(+1.0e-12);
+
   dec.attachSourceLocalField(parafieldS);
   dec.attachTargetLocalField(parafieldT);
   dec.synchronize();