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ENH: ptscotchDecomp: handle locally zero cells

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This commit is contained in:
mattijs
2014-04-04 11:07:16 +01:00
committed by Andrew Heather
parent dfd957514d
commit fbb80e2373
1 changed files with 17 additions and 6 deletions
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13
src/parallel/decompose/ptscotchDecomp/ptscotchDecomp.C
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@ -2,7 +2,7 @@
========= | ========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | \\ / O peration |
\\ / A nd | Copyright (C) 2011-2012 OpenFOAM Foundation \\ / A nd | Copyright (C) 2011-2014 OpenFOAM Foundation
\\/ M anipulation | \\/ M anipulation |
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
License License
@ -531,6 +531,8 @@ Foam::label Foam::ptscotchDecomp::decompose
Pstream::scatter(rangeScale); Pstream::scatter(rangeScale);
if (maxWeights > minWeights) if (maxWeights > minWeights)
{
if (cWeights.size())
{ {
// Convert to integers. // Convert to integers.
velotab.setSize(cWeights.size()); velotab.setSize(cWeights.size());
@ -540,6 +542,15 @@ Foam::label Foam::ptscotchDecomp::decompose
velotab[i] = int((cWeights[i]/minWeights - 1)*rangeScale) + 1; velotab[i] = int((cWeights[i]/minWeights - 1)*rangeScale) + 1;
} }
} }
else
{
// Locally zero cells but not globally. Make sure we have
// some size so .begin() does not return null pointer. Data
// itself is never used.
velotab.setSize(1);
velotab[0] = 1;
}
}