Meeting 2015 01

January 2015 OMPI Developer's Meeting

This is a standalone meeting; it is not being held in conjunction with an MPI Forum meeting.

Logistics

Doodle for choosing the date: https://doodle.com/zzaupgxge9y6medu

• Date: 9am Tuesday, January 27 through 3pm Thursday, January 29, 2015
• Location: Cisco facility (outside Dallas):

2200 East President George Bush Highway
Richardson, Texas 75082-3550

Google maps link: https://goo.gl/maps/SNrbu

Attendees

• Jeff Squyres - Cisco
• Howard Pritchard - Los Alamos
• Ralph Castain - Intel
• George Bosilca - U. Tennessee, Knoxville
• Dave Goodell - Cisco
• Artem Polyakov - ?
• Edgar Gabriel (not Monday probably) - U. Houston
• Vish Venkatesan (not Tuesday) - U. Houston
• Geoff Paulsen - IBM
• Joshua Ladd - Mellanox Technologies
• Rayaz Jagani - IBM
• Dave Solt - IBM
• Nathan Hjelm (remote) - Los Alamos
• Naoyuki Shida - Fujitsu
• Shinji Sumimoto - Fujitsu
• ...please add your name if you plan to attend...

Topics

• Branch for v1.9
• Jenkins integration with Github:
  • how do we do multiple Jenkins servers? (e.g., running at different organizations)
• Review: v1.8 series / RM experience with Github and Jenkins and the release process
  • Ralph's feedback: lots more PRs than we used to have CMRs
  • Ralph's feedback: people seem to be relying on Jenkins for correctness, when Jenkins is really just a smoke test
• Performance of freelists and other common OPAL classes with OPAL_ENABLE_MULTI_THREADS==1 (as discussed in [GitHub])
• Scalable startup, including:
  • Async modex, static endpoint support
  • Re-define the role of PML/BTL add_procs: need to move to a more lazy-based setup of peers
  • Memory footprint reduction
• RTE-MPI sharing of BTLs
• Data passing down to OPAL
  • Revising process naming scheme
  • MPI_Info
• Progress on async progress
  • What happened to this proposal: http://www.open-mpi.org/community/lists/devel/2014/02/14170.php
• Progress on thread-multiple support
• MTL overhead reduction
• Error response planning
• Collective switching points & MPI tuning params - what is required to change them
• Memkind integration: see http://www.open-mpi.org/community/lists/devel/2014/11/16320.php
• MPI extensions: MPIX_ prefix, or OMPI_ prefix?
• PMIx and ORCM updates
• --disable-smp-locks: remove this option?
  • See RFC email http://www.open-mpi.org/community/lists/devel/2015/01/16736.php
  • See, in particular, George's replies
• Fujitsu future plans for Open MPI development

Resolved

• TBD

Since this will be a full meeting in itself, we'll have a good amount of time for discussion, design, and for hacking!