WeeklyTelcon_20160126

Open MPI Weekly Telcon

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• Dialup Info: (Do not post to public mailing list or public wiki)

Attendees

• Geoff Paulsen
• Jeff Squyres
• Brad Benton
• Edgar Gabriel
• Geoffroy Vallee
• Joshua Ladd
• Nathan Hjelm
• Ralph Castain
• Ryan Grant
• Sylvain Jeaugey
• Todd Kordenbrock

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Agenda

Review 1.10

• Milestones: https://github.com/open-mpi/ompi-release/milestones/v1.10.3
• 1.10.2 went out the Door.
• Already have a bug (Giles) Ralph fixed.
• Another bug Fortran - broken F08 bindings (Jeff) saw late last night.
  • If it's broken, how did it pass testing? Jeff needs a day or two to dig into.
• Need to verify that library versions are still correct? -Jeff took care of.
• MPI_Abort investigation (Ralph)? - Periodically have this issue where MPI_Abort + MTT has some issue. Perl is suspect, Ralph will look into ruby or another language.
• 1.10 C Strided mutex lock issue. (Nathan)?
• High CPU utilization on Async progress thread (Ralph)? Ralph Fixed... One off 1.10, not in master. In 1.10.2

Review 2.0.x

• Wiki: https://github.com/open-mpi/ompi/wiki/Releasev20
• Blocker Issues: https://github.com/open-mpi/ompi/issues?utf8=%E2%9C%93&q=is%3Aopen+milestone%3Av2.0.0+label%3Ablocker
  1. Issue 1252 - Nathan's progression decay function progress? Looking at files today.
     • udcm, openib_error_handler - opal_outputs would be sufficent.
  2. Issue 1215 - Group Comm Errors thing (Ralph) - Deal with race condition in ORTE collectives.
     • Launch goes down the tree. Mutex goes across the tree.
     • So possible to receive a modex message before you receive launch message.
• Milestones: https://github.com/open-mpi/ompi-release/milestones/v2.0.0
• Group Comms weren't working for Comms of powers of 2. (Nathan)? Fixed.
• ROMIO default for OMPI on Luster (only) PR 896?
• 894, 890, 900, 901 - Jeff and Howard are good with. Jeff?
• Issue 1292 - Asked Ralph if this is right way to fix this. (Ralph)
• Issue 1177 - large message writev, fixed but not merged to master - Test working everywhere but OS X / BSD (George).
  • OS X / BSD limits large message total size to 32K?
  • Not going to fix for 2.0.0
  • Someone can write code to handle OS X / BSD.
• Issue 1299 - hang (Nathan)?
• 2.0.0 does not compile on Solaris due to statfs(). Now that we moved to OMPIO, we're now hitting the problem.
  • Edgar is working on it. solaris has different number of args and return code.
• Issue 1301 - check max CQ size before creating CQ. (Josh)?
• HWThreads - Ralph? Talk to Mike about use case?
• Travis Status on 2.0?

Review Master?

• BTL flags = 305 perf got horrible? Edgar?
• OMPIO not finding PFS2

MTT status:

• Cisco was showing timeouts.

Status Updates:

• Cisco
• ORNL
• UTK
• NVIDIA

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Status Update Rotation

1. Cisco, ORNL, UTK, NVIDIA
2. Mellanox, Sandia, Intel
3. LANL, Houston, HLRS, IBM

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