7006056eae
ENH: eliminate unnecessary duplicate communicator - in globalMeshData previously had a comm_dup hack to avoid clashes with deltaCoeffs calculations. However, this was largely due to a manual implementation of reduce() that used point-to-point communication. This has since been updated to use an MPI_Allreduce and now an MPI_Allgather, neither of which need this hack.
101 lines
3.0 KiB
C++
101 lines
3.0 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | www.openfoam.com
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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Copyright (C) 2011-2017 OpenFOAM Foundation
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Copyright (C) 2020 OpenCFD Ltd.
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "Gather.H"
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#include "IPstream.H"
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#include "OPstream.H"
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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template<class Type>
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Foam::Gather<Type>::Gather(const Type& localData, const bool redistribute)
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:
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nProcs_(Foam::max(1, UPstream::nProcs()))
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{
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this->list().resize(nProcs_);
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//
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// Collect sizes on all processor
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//
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if (UPstream::parRun())
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{
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if (UPstream::master())
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{
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auto iter = this->list().begin();
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*iter = localData;
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// Receive data
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for (const int proci : UPstream::subProcs())
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{
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++iter;
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IPstream::recv(*iter, proci);
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}
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// Send data
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for (const int proci : UPstream::subProcs())
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{
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if (redistribute)
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{
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OPstream::send(*this, proci);
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}
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else
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{
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// Dummy send (to balance sends/receives)
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OPstream::send(label(0), proci);
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}
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}
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}
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else
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{
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// Send my local data to master
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OPstream::send(localData, UPstream::masterNo());
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// Receive data from master
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if (redistribute)
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{
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IPstream::recv(*this, UPstream::masterNo());
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}
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else
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{
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// Dummy receive
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label dummy;
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IPstream::recv(dummy, UPstream::masterNo());
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}
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}
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}
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else
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{
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this->list().resize(1);
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this->list()[0] = localData;
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}
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}
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// ************************************************************************* //
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