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paboyle
2017-11-19 01:39:04 +00:00
parent 69929f20bb
commit 94b8fb5686
4 changed files with 102 additions and 20 deletions
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47
lib/communicator/Communicator_base.cc
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@ -134,8 +134,18 @@ void CartesianCommunicator::AllToAll(void *in,void *out,uint64_t words,uint64_t
CartesianCommunicator::CartesianCommunicator(const std::vector<int> &processors,const CartesianCommunicator &parent,int &srank)
{
_ndimension = processors.size();
assert(_ndimension = parent._ndimension);
int parent_ndimension = parent._ndimension; assert(_ndimension >= parent._ndimension);
std::vector<int> parent_processor_coor(_ndimension,0);
std::vector<int> parent_processors (_ndimension,1);
// Can make 5d grid from 4d etc...
int pad = _ndimension-parent_ndimension;
for(int d=0;d<parent_ndimension;d++){
parent_processor_coor[pad+d]=parent._processor_coor[d];
parent_processors [pad+d]=parent._processors[d];
}
//////////////////////////////////////////////////////////////////////////////////////////////////////
// split the communicator
//////////////////////////////////////////////////////////////////////////////////////////////////////
@ -154,9 +164,9 @@ CartesianCommunicator::CartesianCommunicator(const std::vector<int> &processors,
std::vector<int> ssize(_ndimension); // coor of split within parent
for(int d=0;d<_ndimension;d++){
ccoor[d] = parent._processor_coor[d] % processors[d];
scoor[d] = parent._processor_coor[d] / processors[d];
ssize[d] = parent._processors[d] / processors[d];
ccoor[d] = parent_processor_coor[d] % processors[d];
scoor[d] = parent_processor_coor[d] / processors[d];
ssize[d] = parent_processors[d] / processors[d];
}
int crank; // rank within subcomm ; srank is rank of subcomm within blocks of subcomms
// Mpi uses the reverse Lexico convention to us
@ -166,38 +176,34 @@ CartesianCommunicator::CartesianCommunicator(const std::vector<int> &processors,
MPI_Comm comm_split;
if ( Nchild > 1 ) {
/*
std::cout << GridLogMessage<<"Child communicator of "<< std::hex << parent.communicator << std::dec<<std::endl;
std::cout << GridLogMessage<<" parent grid["<< parent._ndimension<<"] ";
for(int d=0;d<parent._processors.size();d++) std::cout << parent._processors[d] << " ";
for(int d=0;d<parent._ndimension;d++) std::cout << parent._processors[d] << " ";
std::cout<<std::endl;
std::cout << GridLogMessage<<" child grid["<< _ndimension <<"] ";
for(int d=0;d<processors.size();d++) std::cout << processors[d] << " ";
std::cout<<std::endl;
std::cout << GridLogMessage<<" old rank "<< parent._processor<<" coor ["<< _ndimension <<"] ";
for(int d=0;d<processors.size();d++) std::cout << parent._processor_coor[d] << " ";
std::cout << GridLogMessage<<" old rank "<< parent._processor<<" coor ["<< parent._ndimension <<"] ";
for(int d=0;d<parent._ndimension;d++) std::cout << parent._processor_coor[d] << " ";
std::cout<<std::endl;
std::cout << GridLogMessage<<" new split "<< srank<<" scoor ["<< _ndimension <<"] ";
for(int d=0;d<processors.size();d++) std::cout << scoor[d] << " ";
std::cout<<std::endl;
std::cout << GridLogMessage<<" new rank "<< crank<<" coor ["<< _ndimension <<"] ";
for(int d=0;d<processors.size();d++) std::cout << ccoor[d] << " ";
std::cout<<std::endl;
std::cout << GridLogMessage<<" new coor ["<< _ndimension <<"] ";
for(int d=0;d<processors.size();d++) std::cout << parent._processor_coor[d] << " ";
std::cout<<std::endl;
*/
int ierr= MPI_Comm_split(parent.communicator,srank,crank,&comm_split);
assert(ierr==0);
//////////////////////////////////////////////////////////////////////////////////////////////////////
// Declare victory
//////////////////////////////////////////////////////////////////////////////////////////////////////
/*
std::cout << GridLogMessage<<"Divided communicator "<< parent._Nprocessors<<" into "
<< Nchild <<" communicators with " << childsize << " ranks"<<std::endl;
*/
} else {
comm_split=parent.communicator;
srank = 0;
@ -207,6 +213,15 @@ CartesianCommunicator::CartesianCommunicator(const std::vector<int> &processors,
// Set up from the new split communicator
//////////////////////////////////////////////////////////////////////////////////////////////////////
InitFromMPICommunicator(processors,comm_split);
std::cout << " ndim " <<_ndimension<<" " << parent._ndimension << std::endl;
for(int d=0;d<processors.size();d++){
std::cout << d<< " " << _processor_coor[d] <<" " << ccoor[d]<<std::endl;
}
for(int d=0;d<processors.size();d++){
assert(_processor_coor[d] == ccoor[d] );
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////////