Hi,
a similar question was recently discussed on the mailing list:
http://www.open-mpi.org/community/lists/users/2009/08/10458.php
George Markomanolis wrote:
Dear all,
I am trying to figure out the algorithms that are used for some
collective communications (allreduce, bcast, alltoall). Is there any
document to explain which algorithms are used? For example I would
like to know exactly how the command allreduce is analyzed to send and
receive.
Thanks a lot,
Best regards,
George Markomanolis
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