Passing a port on the cmd line for accept/connect was never implemented as I don’t think anyone really cared. Given how OMPI uses PMIx for that operation, it shouldn’t be all that difficult to do. As noted in the referenced issue, there was a problem last year with cross-mpirun connections. Not sure when I’ll have time to look at it. Canceling the meeting today is fine with me - I got pulled away and didn’t get the PMIx Groups implementation done (sigh).

On Aug 20, 2018, at 8:10 AM, HOLMES Daniel <[email protected]> wrote:

Hi Howard,

Thanks for the update. Sounds promising.

I'm trying to fix the test3.zip example from: https://github.com/open-mpi/ompi/issues/3458#issuecomment-322951227 <https://github.com/open-mpi/ompi/issues/3458#issuecomment-322951227>

If successful, this would extend the testing opportunities for the sandbox code to situations that involve more than one mpirun. The issue is definitely some sort of deadlock in PMIx but I’ve not figured it out completely yet.

I’m cancelling the meeting today, unless anyone objects in the next 50 minutes.

Cheers, Dan. — Dr Daniel Holmes PhD Applications Consultant in HPC Research [email protected] <mailto:[email protected]> Phone: +44 (0) 131 651 3465 Mobile: +44 (0) 7940 524 088 Address: Room 3415, JCMB, The King’s Buildings, Edinburgh, EH9 3FD — The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. —

...

On 20 Aug 2018, at 15:55, Pritchard Jr., Howard <[email protected] <mailto:[email protected]>> wrote:

HI Folks,

I’ll be on a plane at 11 AM MDT today so will not be able to call in.

I tried running the tests Dan had added/modified and observed what he did, that one can’t allow more than one outstanding accept/connect going on at a time or Open MPI’s ORTE gets confused. I reduced this down to a simpler test which hangs with only 3 ranks and am narrowing down what the issue is.

I’ll be opening a PR with changes to chapter 8 of the standard and replacement for MPI_Get_Set_Names later this week.

Howard

-- Howard Pritchard B Schedule HPC-ENV Office 9, 2nd floor Research Park TA-03, Building 4200, Room 203 Los Alamos National Laboratory

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