Adding the UCX list to this thread.

On Fri, Aug 23, 2019 at 7:35 PM Paul Edmon via users <> wrote:

> I have a code using MPI_THREAD_MULTIPLE along with MPI-RMA that I'm
> using OpenMPI 4.0.1.  Since 4.0.1 requires UCX I have it installed with
> MT on (1.6.0 build).  The thing is that the code keeps stalling out when
> I go above a couple of nodes.  UCX is new to our environment as
> previously we have just used the regular IB Verbs with no problem.  My
> guess is that there is either some option in OpenMPI I am missing or
> some variable in UCX I am not setting.  Any insight on what could be
> causing the stalls?
> -Paul Edmon-
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