ISAllGatherColors

Given a set of colors on each processor, generates a large set (same on each processor) by concatenating together each processors colors

Synopsis

#include "petscis.h"  
PetscErrorCode ISAllGatherColors(MPI_Comm comm, PetscInt n, ISColoringValue lindices[], PetscInt *outN, ISColoringValue *outindices[])

Collective

Input Parameters

• comm - communicator to share the indices

• n - local size of set

• lindices - local colors

Output Parameters

• outN - total number of indices

• outindices - all of the colors

Note

ISAllGatherColors() is clearly not scalable for large index sets.

See Also

ISCOloringValue, ISColoring(), ISCreateGeneral(), ISCreateStride(), ISCreateBlock(), ISAllGather()

Level

intermediate

Location

src/vec/is/is/utils/iscoloring.c

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Index of all IS routines
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Index of all manual pages