14631984df
- PstreamBuffers nProcs() and allProcs() methods to recover the rank
information consistent with the communicator used for construction
- allowClearRecv() methods for more control over buffer reuse
For example,
pBufs.allowClearRecv(false);
forAll(particles, particlei)
{
pBufs.clear();
fill...
read via IPstream(..., pBufs);
}
This preserves the receive buffers memory allocation between calls.
- finishedNeighbourSends() method as compact wrapper for
finishedSends() when send/recv ranks are identically
(eg, neighbours)
- hasSendData()/hasRecvData() methods for PstreamBuffers.
Can be useful for some situations to skip reading entirely.
For example,
pBufs.finishedNeighbourSends(neighProcs);
if (!returnReduce(pBufs.hasRecvData(), orOp<bool>()))
{
// Nothing to do
continue;
}
...
On an individual basis:
for (const int proci : pBufs.allProcs())
{
if (pBufs.hasRecvData(proci))
{
...
}
}
Also conceivable to do the following instead (nonBlocking only):
if (!returnReduce(pBufs.hasSendData(), orOp<bool>()))
{
// Nothing to do
pBufs.clear();
continue;
}
pBufs.finishedNeighbourSends(neighProcs);
...
114 lines
3.1 KiB
C
114 lines
3.1 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) 2022 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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Description
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Test/output processor topology
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\*---------------------------------------------------------------------------*/
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#include "argList.H"
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#include "Time.H"
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#include "polyMesh.H"
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#include "globalMeshData.H"
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#include "OFstream.H"
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using namespace Foam;
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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// Main program:
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int main(int argc, char *argv[])
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{
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argList::noFunctionObjects();
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argList::addNote
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(
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"Create a metis graph file representation for an OpenFOAM mesh"
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);
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#include "setRootCase.H"
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if (!Pstream::parRun())
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{
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FatalErrorInFunction
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<< "Only meaningful in parallel"
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<< exit(FatalError);
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}
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#include "createTime.H"
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#include "createPolyMesh.H"
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const globalMeshData& globData = mesh.globalData();
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const labelListList& connectivity = globData;
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if (Pstream::master())
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{
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OFstream os("processorTopology.dot");
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os << "// processorTopology" << nl << nl;
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os.beginBlock("graph");
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forAll(connectivity, proci)
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{
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label nconn = 0;
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for (const label neighProci : connectivity[proci])
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{
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if (proci < neighProci)
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{
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if (nconn++)
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{
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os << " ";
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}
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else
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{
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os << indent;
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}
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os << proci << " -- " << neighProci;
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}
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}
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if (nconn)
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{
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os << nl;
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}
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}
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os.endBlock();
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Info<< "Wrote processorTopology graph: "
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<< runTime.relativePath(os.name()) << nl;
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Info<< nl
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<< "Use neato, circo or fdp graphviz tools" << nl;
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}
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Info<< nl << "End\n" << endl;
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return 0;
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}
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// ************************************************************************* //
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