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ENH: globalIndex gather/scatter scheduled (not nonBlocking) for non-contiguous

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- reduces later surprises and simplifies effort for the caller

- more flexible globalIndex scatter with auto-sized return field.

- Avoid communication for scattering into zero-sized fields.
This commit is contained in:
Mark Olesen
2022-02-22 19:59:13 +01:00
committed by Andrew Heather
parent ff4998d364
commit c178fe8ec1
4 changed files with 162 additions and 125 deletions
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34
src/OpenFOAM/parallel/globalIndex/globalIndex.H
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@ -89,7 +89,7 @@ class globalIndex
static void reportOverflowAndExit
(
const label idx,
const labelUList& localSizes = labelUList::null()
const labelUList& localLens = labelUList::null()
);
public:
@ -178,12 +178,15 @@ public:
//- Global sum of localSizes.
inline label totalSize() const;
//- The local sizes
labelList sizes() const;
//- The local sizes. Same as localSizes()
inline labelList sizes() const;
//- The local starts
inline const labelUList localStarts() const;
//- The local sizes
labelList localSizes() const;
//- Global max of localSizes
inline label maxSize() const;
@ -276,7 +279,7 @@ public:
inline labelList toGlobal(const labelUList& labels) const;
//- From local to global index (inplace)
inline void inplaceToGlobal(labelList& labels) const;
inline void inplaceToGlobal(labelUList& labels) const;
//- From global to local on current processor.
// FatalError if not on local processor.
@ -314,7 +317,7 @@ public:
inline void inplaceToGlobal
(
const label proci,
labelList& labels
labelUList& labels
) const;
@ -405,7 +408,7 @@ public:
//- with optional check for label overflow
static labelList calcOffsets
(
const labelUList& localSizes,
const labelUList& localLens,
const bool checkOverflow = false
);
@ -422,7 +425,7 @@ public:
//- with optional check for label overflow
static List<labelRange> calcRanges
(
const labelUList& localSizes,
const labelUList& localLens,
const bool checkOverflow = false
);
@ -774,8 +777,21 @@ public:
template<class Type>
void scatter
(
const UList<Type>& allFld,
UList<Type>& fld,
const UList<Type>& allData,
UList<Type>& localData,
const int tag = UPstream::msgType(),
const Pstream::commsTypes = Pstream::commsTypes::nonBlocking,
const label comm = UPstream::worldComm //!< communicator
) const;
//- Distribute data in processor order
//- (in serial: performs a simple copy).
// Communication with default/specified communicator, message tag.
// \note the globalIndex offsets needed on master only.
template<class Type, class OutputContainer = List<Type>>
OutputContainer scatter
(
const UList<Type>& allData,
const int tag = UPstream::msgType(),
const Pstream::commsTypes = Pstream::commsTypes::nonBlocking,
const label comm = UPstream::worldComm //!< communicator