Re: [OMPI devel] [OMPI commits] Git: open-mpi/ompi branch master updated. dev-1195-gfbb7c80

2015-03-02 Thread George Bosilca
How do you support MPI dynamic processes over MXM? George. On Mon, Mar 2, 2015 at 12:43 PM, Alexander Mikheev wrote: > Mxm needs that barrier. Otherwise some ranks may hung trying to close mxm > connections > > > -Original Message- > > From: devel [mailto:devel-boun...@open-mpi.org] O

Re: [OMPI devel] [OMPI commits] Git: open-mpi/ompi branch master updated. dev-1195-gfbb7c80

2015-03-02 Thread George Bosilca
I answered to the PR but I'll bring my comment here as well. In addition to the performance implication, there might be a correctness implication here. del_procs does not have to be called globally by all participating processes in same time, and can be called with a subset of processes. As an exam

Re: [OMPI devel] [OMPI commits] Git: open-mpi/ompi branch master updated. dev-1195-gfbb7c80

2015-03-02 Thread Alexander Mikheev
Mxm needs that barrier. Otherwise some ranks may hung trying to close mxm connections > -Original Message- > From: devel [mailto:devel-boun...@open-mpi.org] On Behalf Of Ralph > Castain > Sent: Monday, March 02, 2015 5:05 PM > To: de...@open-mpi.org > Subject: Re: [OMPI devel] [OMPI commi

Re: [OMPI devel] [OMPI commits] Git: open-mpi/ompi branch master updated. dev-1195-gfbb7c80

2015-03-02 Thread Ralph Castain
It’s your code, so you are welcome to do this if you want. I’ll just point out that his is a really big hit in total execution time at scale as it will be done in addition to the barrier already performed in MPI_Finalize So you are going to do _two_ barriers during shutdown. > On Mar 2, 2015,