ISCreateBlock

Creates a data structure for an index set containing a list of integers. The indices are relative to entries, not blocks.

Synopsis

int ISCreateBlock(MPI_Comm comm,int bs,int n,const int idx[],IS *is)
Collective on MPI_Comm

Input Parameters

n - the length of the index set (the number of blocks)
bs - number of elements in each block
idx - the list of integers
comm - the MPI communicator

Output Parameter

is -the new index set

Notes

When the communicator is not MPI_COMM_SELF, the operations on the index sets, IS, are NOT conceptually the same as MPI_Group operations. The index sets are then distributed sets of indices.

Example

If you wish to index the values {0,1,4,5}, then use a block size of 2 and idx of {0,4}.

Keywords

IS, index set, create, block

See Also

ISCreateStride(), ISCreateGeneral(), ISAllGather()

Level:beginner
Location:src/vec/is/impls/block/block.c
Index Set
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