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ENH: use mpi gather for list values in a few places

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- avoid gatherList/scatterList when value are only need on master
This commit is contained in:
Mark Olesen
2022-02-25 17:42:57 +01:00
committed by Andrew Heather
parent c086f22298
commit af8161925b
9 changed files with 180 additions and 199 deletions
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47
src/sampling/meshToMesh/meshToMeshParallelOps.C
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@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2012-2017 OpenFOAM Foundation
Copyright (C) 2015-2021 OpenCFD Ltd.
Copyright (C) 2015-2022 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -48,35 +48,30 @@ Foam::label Foam::meshToMesh::calcDistribution
if (Pstream::parRun())
{
List<label> cellsPresentOnProc(Pstream::nProcs(), Zero);
if ((src.nCells() > 0) || (tgt.nCells() > 0))
const bitSet hasMesh
(
UPstream::listGatherValues<bool>
(
src.nCells() > 0 || tgt.nCells() > 0
)
);
const auto nHaveMesh = hasMesh.count();
if (nHaveMesh == 1)
{
cellsPresentOnProc[Pstream::myProcNo()] = 1;
}
else
{
cellsPresentOnProc[Pstream::myProcNo()] = 0;
}
Pstream::gatherList(cellsPresentOnProc);
Pstream::scatterList(cellsPresentOnProc);
label nHaveCells = sum(cellsPresentOnProc);
if (nHaveCells > 1)
{
proci = -1;
DebugInFunction
<< "Meshes split across multiple processors" << endl;
}
else if (nHaveCells == 1)
{
proci = cellsPresentOnProc.find(1);
proci = hasMesh.find_first();
DebugInFunction
<< "Meshes local to processor" << proci << endl;
}
else if (nHaveMesh > 1)
{
proci = -1;
DebugInFunction
<< "Meshes split across multiple processors" << endl;
}
Pstream::broadcast(proci);
}
return proci;