-// Copyright (C) 2007-2013 CEA/DEN, EDF R&D
+// Copyright (C) 2007-2016 CEA/DEN, EDF R&D
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
-// version 2.1 of the License.
+// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
using namespace std;
-namespace ParaMEDMEM
+namespace MEDCoupling
{
- 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, int workSharingAlgo)
: _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();
+
+ computeBoundingBoxesAndInteractionList();
+ switch(workSharingAlgo)
+ {
+ case 0:
+ computeTodoList_original(); break;
+ case 1:
+ computeTodoList_new(false); break;
+ case 2:
+ computeTodoList_new(true); break;
+ default:
+ throw INTERP_KERNEL::Exception("OverlapElementLocator::OverlapElementLocator(): invalid algorithm selected!");
+ }
+
+ fillProcToSend();
}
OverlapElementLocator::~OverlapElementLocator()
return group->getComm();
}
- void OverlapElementLocator::computeBoundingBoxes()
+ void OverlapElementLocator::computeBoundingBoxesAndInteractionList()
{
CommInterface comm_interface=_group.getCommInterface();
const MPIProcessorGroup* group=static_cast<const MPIProcessorGroup*> (&_group);
_proc_pairs.resize(_group.size());
for(int i=0;i<_group.size();i++)
for(int j=0;j<_group.size();j++)
- {
- if(intersectsBoundingBox(i,j))
- _proc_pairs[i].push_back(j);
- }
+ if(intersectsBoundingBox(i,j))
+ _proc_pairs[i].push_back(j);
+ }
+ void OverlapElementLocator::computeTodoList_original()
+ {
// 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());
+ _all_todo_lists.resize(_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));
+ if(_all_todo_lists[i].size()<=_all_todo_lists[*it2].size())//it includes the fact that i==*it2
+ _all_todo_lists[i].push_back(ProcCouple(i,*it2));
else
- pairsToBeDonePerProc[*it2].push_back(std::pair<int,int>(i,*it2));
+ _all_todo_lists[*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'
//If _group.myRank()==myPair.first, current proc should fetch target mesh of myPair.second (if different from _group.myRank()).
//If _group.myRank()==myPair.second, current proc should fetch source mesh of myPair.second.
-
+
int myProcId=_group.myRank();
- _to_do_list=pairsToBeDonePerProc[myProcId];
+ _to_do_list=_all_todo_lists[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();
- for(int i=_group.size()-1;i>=0;i--)
- if(i!=myProcId)
+#ifdef DEC_DEBUG
+ 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";
+#endif
+ }
+
+ /* More efficient (?) work sharing algorithm: a job (i,j) is initially assigned twice: to proc#i and to proc#j.
+ * Then try to reduce as much as possible the variance of the num of jobs per proc by selecting the right duplicate
+ * to remove:
+ * - take the most loaded proc i,
+ * + select the job (i,j) for which proc#j is the less loaded
+ * + remove this job from proc#i, and mark it as 'unremovable' from proc#j
+ * - repeat until no more duplicates are found
+ */
+ void OverlapElementLocator::computeTodoList_new(bool revertIter)
+ {
+ using namespace std;
+ int infinity = std::numeric_limits<int>::max();
+ // Initialisation
+ int grp_size = _group.size();
+ vector < map<ProcCouple, int> > full_set(grp_size );
+ int srcProcID = 0;
+ for(vector< vector< int > >::const_iterator it = _proc_pairs.begin(); it != _proc_pairs.end(); it++, srcProcID++)
+ for (vector< int >::const_iterator it2=(*it).begin(); it2 != (*it).end(); it2++)
+ {
+ // Here a pair of the form (i,i) is added only once!
+ int tgtProcID = *it2;
+ ProcCouple cpl = make_pair(srcProcID, tgtProcID);
+ full_set[srcProcID][cpl] = -1;
+ full_set[tgtProcID][cpl] = -1;
+ }
+ int procID = 0;
+ vector < map<ProcCouple, int> > ::iterator itVector;
+ map<ProcCouple, int>::iterator itMap;
+ for(itVector = full_set.begin(); itVector != full_set.end(); itVector++, procID++)
+ for (itMap=(*itVector).begin(); itMap != (*itVector).end(); itMap++)
{
- 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++)
+ const ProcCouple & cpl = (*itMap).first;
+ if (cpl.first == cpl.second)
+ // special case - this couple can not be removed in the future
+ (*itMap).second = infinity;
+ else
{
- 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));
+ if(cpl.first == procID)
+ (*itMap).second = full_set[cpl.second].size();
+ else // cpl.second == srcProcID
+ (*itMap).second = full_set[cpl.first].size();
}
}
+ INTERP_KERNEL::AutoPtr<bool> proc_valid = new bool[grp_size];
+ fill((bool *)proc_valid, proc_valid+grp_size, true);
+
+ // Now the algo:
+ while (find((bool *)proc_valid, proc_valid+grp_size, true) != proc_valid+grp_size)
+ {
+ // Most loaded proc:
+ int max_sz = -1, max_id = -1;
+ for(itVector = full_set.begin(), procID=0; itVector != full_set.end(); itVector++, procID++)
+ {
+ int sz = (*itVector).size();
+ if (proc_valid[procID] && sz > max_sz)
+ {
+ max_sz = sz;
+ max_id = procID;
+ }
+ }
+
+ // Nothing more to do:
+ if (max_sz == -1)
+ break;
+ // For this proc, job with less loaded second proc:
+ int min_sz = infinity;
+ map<ProcCouple, int> & max_map = full_set[max_id];
+ ProcCouple hit_cpl = make_pair(-1,-1);
+ if(revertIter)
+ {
+ // Use a reverse iterator here increases our chances to hit a couple of the form (i, myProcId)
+ // meaning that the final matrix computed won't have to be sent: save some comm.
+ map<ProcCouple, int> ::const_reverse_iterator ritMap;
+ for(ritMap=max_map.rbegin(); ritMap != max_map.rend(); ritMap++)
+ if ((*ritMap).second < min_sz)
+ hit_cpl = (*ritMap).first;
+ }
+ else
+ {
+ for(itMap=max_map.begin(); itMap != max_map.end(); itMap++)
+ if ((*itMap).second < min_sz)
+ hit_cpl = (*itMap).first;
+ }
+ if (hit_cpl.first == -1)
+ {
+ // Plouf. Current proc 'max_id' can not be reduced. Invalid it:
+ proc_valid[max_id] = false;
+ continue;
+ }
+ // Remove item from proc 'max_id'
+ full_set[max_id].erase(hit_cpl);
+ // And mark it as not removable on the other side:
+ if (hit_cpl.first == max_id)
+ full_set[hit_cpl.second][hit_cpl] = infinity;
+ else // hit_cpl.second == max_id
+ full_set[hit_cpl.first][hit_cpl] = infinity;
+
+ // Now update all counts of valid maps:
+ procID = 0;
+ for(itVector = full_set.begin(); itVector != full_set.end(); itVector++, procID++)
+ if(proc_valid[procID] && procID != max_id)
+ for(itMap = (*itVector).begin(); itMap != (*itVector).end(); itMap++)
+ {
+ const ProcCouple & cpl = (*itMap).first;
+ // Unremovable item:
+ if ((*itMap).second == infinity)
+ continue;
+ if (cpl.first == max_id || cpl.second == max_id)
+ (*itMap).second--;
+ }
+ }
+ // Final formatting - extract remaining keys in each map:
+ int myProcId=_group.myRank();
+ _all_todo_lists.resize(grp_size);
+ procID = 0;
+ for(itVector = full_set.begin(); itVector != full_set.end(); itVector++, procID++)
+ for(itMap = (*itVector).begin(); itMap != (*itVector).end(); itMap++)
+ _all_todo_lists[procID].push_back((*itMap).first);
+ _to_do_list=_all_todo_lists[myProcId];
+
+#ifdef DEC_DEBUG
+ 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";
+#endif
}
+ void OverlapElementLocator::debugPrintWorkSharing(std::ostream & ostr) const
+ {
+ std::vector< std::vector< ProcCouple > >::const_iterator it = _all_todo_lists.begin();
+ ostr << "TODO list lengths: ";
+ for(; it != _all_todo_lists.end(); ++it)
+ ostr << (*it).size() << " ";
+ ostr << "\n";
+ }
+
+ void OverlapElementLocator::fillProcToSend()
+ {
+ // Feeding now '_procs_to_send*'. A same id can appears twice. The second parameter in pair means what
+ // to send true=source, false=target
+ int myProcId=_group.myRank();
+ _procs_to_send_mesh.clear();
+ _procs_to_send_field.clear();
+ for(int i=_group.size()-1;i>=0;i--)
+ {
+ const std::vector< ProcCouple >& anRemoteProcToDoList=_all_todo_lists[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));
+ }
+ }
+ }
+
+
/*!
* The aim of this method is to perform the communication to get data corresponding to '_to_do_list' attribute.
* The principle is the following : if proc n1 and n2 need to perform a cross sending with n1<n2, then n1 will send first and receive then.
{
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);
}
}
}
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;
}
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;
}
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;
}
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::isInMyTodoList(int i, int j) const
+ {
+ ProcCouple cpl = std::make_pair(i, j);
+ return std::find(_to_do_list.begin(), _to_do_list.end(), cpl)!=_to_do_list.end();
+ }
+
bool OverlapElementLocator::intersectsBoundingBox(int isource, int itarget) const
{
const double *source_bb=_domain_bounding_boxes+isource*2*2*_local_space_dim;
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;
}
}
/*!
- * 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.
*/
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;
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;
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((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();
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);