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Option to force use of MPI over Nvlink

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This commit is contained in:
Peter Boyle
2021-09-21 00:53:25 +02:00
parent 68650b61fe
commit 109507888b
4 changed files with 15 additions and 7 deletions
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6
Grid/communicator/Communicator_mpi3.cc
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@ -384,6 +384,12 @@ double CartesianCommunicator::StencilSendToRecvFromBegin(std::vector<CommsReques
assert(ierr==0);
list.push_back(xrq);
off_node_bytes+=bytes;
} else {
// TODO : make a OMP loop on CPU, call threaded bcopy
void *shm = (void *) this->ShmBufferTranslate(dest,recv);
assert(shm!=NULL);
acceleratorCopyDeviceToDeviceAsynch(xmit,shm,bytes);
acceleratorCopySynchronise(); // MPI prob slower
}
if ( CommunicatorPolicy == CommunicatorPolicySequential ) {