how to unsubscribe? On Mon, Apr 6, 2015 at 4:45 PM, Filippo Spiga <spiga.fili...@gmail.com> wrote:
> Dear Open MPI developers, > > I wonder if there is a way to address this particular scenario using MPI_T > or other strategies in Open MPI. I saw a similar discussion few days ago, I > assume the same challenges are applied in this case but I just want to > check. Here is the scenario: > > We have a system composed by dual rail Mellanox IB, two distinct > Connect-IB cards per node each one sitting on a different PCI-E lane out of > two distinct sockets. We are seeking a way to control MPI traffic thought > each one of them directly into the application. In specific we have a > single MPI rank per node that goes multi-threading using OpenMP. > MPI_THREAD_MULTIPLE is used, each OpenMP thread may initiate MPI > communication. We would like to assign IB-0 to thread 0 and IB-1 to thread > 1. > > Via mpirun or env variables we can control which IB interface to use by > binding it to a specific MPI rank (or by apply a policy that relate IB to > MPi ranks). But if there is only one MPI rank active, how we can > differentiate the traffic across multiple IB cards? > > Thanks in advance for any suggestion about this matter. > > Regards, > Filippo > > -- > Mr. Filippo SPIGA, M.Sc. > http://filippospiga.info ~ skype: filippo.spiga > > «Nobody will drive us out of Cantor's paradise.» ~ David Hilbert > > ***** > Disclaimer: "Please note this message and any attachments are CONFIDENTIAL > and may be privileged or otherwise protected from disclosure. The contents > are not to be disclosed to anyone other than the addressee. Unauthorized > recipients are requested to preserve this confidentiality and to advise the > sender immediately of any error in transmission." > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/04/26614.php
