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Jelena Pjesivac-Grbovic 36156f39c2 Modification to allreduce ring algorithm:
- the block sizes are computed in more uniformn way.
  The first k blocks may be 1 element larger than the remaining blocks.
The algorithm passed Intel Allreduce_c and Allreduce_loc_c tests, and 
IMB-3.2 Allreduce, over TCP and both btl and mtl MX (up to 128 processes).
The algorithm still only supports commutative operations.

This commit was SVN r13738.
2007-02-21 19:30:08 +00:00
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