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BUG: Fix weight calculation.

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The global sum of (integer) weights for metis&scotch has to be within the
valid range of integers. For now just divided the input (scalar) weights
with the minimum before truncating to integer.
This commit is contained in:
mattijs
2010-02-03 06:12:21 +00:00
parent 5dd93c1189
commit 9c8a5246a9
6 changed files with 66 additions and 8 deletions
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15
src/parallel/decompositionMethods/scotchDecomp/scotchDecomp.C
View File

@ -253,9 +253,19 @@ Foam::label Foam::scotchDecomp::decompose
// Check for externally provided cellweights and if so initialise weights
scalar maxWeights = gMax(cWeights);
scalar minWeights = gMin(cWeights);
if (cWeights.size() > 0)
{
if (minWeights <= 0)
{
WarningIn
(
"scotchDecomp::decompose"
"(const pointField&, const scalarField&)"
) << "Illegal minimum weight " << minWeights
<< endl;
}
if (cWeights.size() != xadj.size()-1)
{
FatalErrorIn
@ -266,11 +276,12 @@ Foam::label Foam::scotchDecomp::decompose
<< " does not equal number of cells " << xadj.size()-1
<< exit(FatalError);
}
// Convert to integers.
velotab.setSize(cWeights.size());
forAll(velotab, i)
{
velotab[i] = int(1000000*cWeights[i]/maxWeights);
velotab[i] = int(cWeights[i]/minWeights);
}
}

5
src/parallel/decompositionMethods/scotchDecomp/scotchDecomp.H
View File

@ -104,6 +104,9 @@ public:
//- Return for every coordinate the wanted processor number. Use the
// mesh connectivity (if needed)
// Weights get truncated to convert into integer
// so e.g. 3.5 is seen as 3. The overall sum of weights
// might otherwise overflow.
virtual labelList decompose
(
const pointField& points,
@ -114,6 +117,7 @@ public:
// passed agglomeration map (from fine to coarse cells) and coarse cell
// location. Can be overridden by decomposers that provide this
// functionality natively.
// See note on weights above.
virtual labelList decompose
(
const labelList& agglom,
@ -128,6 +132,7 @@ public:
// from 0 at processor0 and then incrementing all through the
// processors)
// - the connections are across coupled patches
// See note on weights above.
virtual labelList decompose
(
const labelListList& globalCellCells,

14
src/parallel/metisDecomp/metisDecomp.C
View File

@ -89,9 +89,19 @@ Foam::label Foam::metisDecomp::decompose
// Check for externally provided cellweights and if so initialise weights
scalar maxWeights = gMax(cWeights);
scalar minWeights = gMin(cWeights);
if (cWeights.size() > 0)
{
if (minWeights <= 0)
{
WarningIn
(
"metisDecomp::decompose"
"(const pointField&, const scalarField&)"
) << "Illegal minimum weight " << minWeights
<< endl;
}
if (cWeights.size() != numCells)
{
FatalErrorIn
@ -106,7 +116,7 @@ Foam::label Foam::metisDecomp::decompose
cellWeights.setSize(cWeights.size());
forAll(cellWeights, i)
{
cellWeights[i] = int(1000000*cWeights[i]/maxWeights);
cellWeights[i] = int(cWeights[i]/minWeights);
}
}

5
src/parallel/metisDecomp/metisDecomp.H
View File

@ -101,6 +101,9 @@ public:
//- Return for every coordinate the wanted processor number. Use the
// mesh connectivity (if needed)
// Weights get normalised so the minimum value is 1 before truncation
// to an integer so the weights should be multiples of the minimum
// value. The overall sum of weights might otherwise overflow.
virtual labelList decompose
(
const pointField& points,
@ -111,6 +114,7 @@ public:
// passed agglomeration map (from fine to coarse cells) and coarse cell
// location. Can be overridden by decomposers that provide this
// functionality natively.
// See note on weights above.
virtual labelList decompose
(
const labelList& agglom,
@ -125,6 +129,7 @@ public:
// from 0 at processor0 and then incrementing all through the
// processors)
// - the connections are across coupled patches
// See note on weights above.
virtual labelList decompose
(
const labelListList& globalCellCells,

30
src/parallel/parMetisDecomp/parMetisDecomp.C
View File

@ -428,9 +428,19 @@ Foam::labelList Foam::parMetisDecomp::decompose
// Check for externally provided cellweights and if so initialise weights
scalar maxWeights = gMax(cWeights);
scalar minWeights = gMin(cWeights);
if (cWeights.size() > 0)
{
if (minWeights <= 0)
{
WarningIn
(
"metisDecomp::decompose"
"(const pointField&, const scalarField&)"
) << "Illegal minimum weight " << minWeights
<< endl;
}
if (cWeights.size() != mesh_.nCells())
{
FatalErrorIn
@ -441,11 +451,12 @@ Foam::labelList Foam::parMetisDecomp::decompose
<< " does not equal number of cells " << mesh_.nCells()
<< exit(FatalError);
}
// Convert to integers.
cellWeights.setSize(cWeights.size());
forAll(cellWeights, i)
{
cellWeights[i] = int(1000000*cWeights[i]/maxWeights);
cellWeights[i] = int(cWeights[i]/minWeights);
}
}
@ -779,9 +790,19 @@ Foam::labelList Foam::parMetisDecomp::decompose
// Check for externally provided cellweights and if so initialise weights
scalar maxWeights = gMax(cWeights);
scalar minWeights = gMin(cWeights);
if (cWeights.size() > 0)
{
if (minWeights <= 0)
{
WarningIn
(
"parMetisDecomp::decompose(const labelListList&"
", const pointField&, const scalarField&)"
) << "Illegal minimum weight " << minWeights
<< endl;
}
if (cWeights.size() != globalCellCells.size())
{
FatalErrorIn
@ -792,11 +813,12 @@ Foam::labelList Foam::parMetisDecomp::decompose
<< " does not equal number of cells " << globalCellCells.size()
<< exit(FatalError);
}
// Convert to integers.
cellWeights.setSize(cWeights.size());
forAll(cellWeights, i)
{
cellWeights[i] = int(1000000*cWeights[i]/maxWeights);
cellWeights[i] = int(cWeights[i]/minWeights);
}
}

5
src/parallel/parMetisDecomp/parMetisDecomp.H
View File

@ -112,6 +112,9 @@ public:
//- Return for every coordinate the wanted processor number. Use the
// mesh connectivity (if needed)
// Weights get normalised so the minimum value is 1 before truncation
// to an integer so the weights should be multiples of the minimum
// value. The overall sum of weights might otherwise overflow.
virtual labelList decompose
(
const pointField& points,
@ -122,6 +125,7 @@ public:
// passed agglomeration map (from fine to coarse cells) and coarse cell
// location. Can be overridden by decomposers that provide this
// functionality natively.
// See note on weights above.
virtual labelList decompose
(
const labelList& cellToRegion,
@ -136,6 +140,7 @@ public:
// from 0 at processor0 and then incrementing all through the
// processors)
// - the connections are across coupled patches
// See note on weights above.
virtual labelList decompose
(
const labelListList& globalCellCells,