There is an ongoing discussion about this on issue #4067 (
https://github.com/open-mpi/ompi/issues/4067). Also the mailing list
contains few examples on how to tweak the collective algorithms to your
needs.
George.
On Thu, Jun 6, 2019 at 7:42 PM hash join via users
wrote:
> Hi all,
>
>
> I
Hi all,
I want to use the MPI_Allreduce to synchronize results from all the
processes:
https://github.com/open-mpi/ompi/blob/master/ompi/mpi/c/allreduce.c
But I want to know the background algorithm to implement Allreduce. When I
check the coll base of MPI_Allreduce:
