WeeklyTelcon_20180515

Open MPI Weekly Telecon

Schedule:
- Quick turnaround on this, Shooting for May 1st.
Posted v3.0.2 RC1 yesterday
- Hope to be
- Need to sort out shared library version numbers.
- Jeff will finish looking at PR tomorrow or today.

Shipped v3.1.0 last week
Merged in most of outstanding changes on v3.1.x
- 3 still awaiting review.
- Can someone look at opal_free_list fix?
- PR4397 - UCX
Schedule
- Like to hold to a month turn around.
- Next week, will cut a release canidate.
Long outstanding list of PR for v3.1.x branch.
- 4 or 5 need review. one is Geoff tagged for review. (done)
- will hold of about a week in case we need to do a quick turn-around oops release.
Mellanox v3.1.x MTT has many many failures. Josh will look at.
For v3.1.1 - Want to get UCX OSC at a higher priority.
- Issue 5048
- looking pretty good. Howard brought up some issues on single node with xpmem.
  - UCX bug.
  - Xin will rerun and see where we stand.
- xpmem can be disabled via env var.
- Issue with Connect-X3 attomic support. UCX limitation.
  - For v3.1.1 Some want fallbacks, or Errors, but don't segv.
- For v4.0
  - Mellanox planning to do emulation on CPU if IB card can't do HCA attomics.
  - Still need a check in OMPI, incase they're running with old UCX.

Schedule: mid-July branch. mid-Sept relelase.
Start meeting weekly.
- iWarp have a person to contact.
- Unclear if UCT BTL will work on Connect-X3 or Broadcomm rocky.
UCX Community has committed to doing Emulation in UCX.
- UCX + Connect-X3 Will work for pt2pt and collectives, but not RMA
- Will emulate for v4.0.0
It would be nice to have a doc that is the set of supported hardware / and which drivers to use.
As a heads up ULFM support may require PMIx v3.0
MPI Standards removal for MPI removed items in Open MPI v4.0
- Nathan sent out email about PR 5127 - to remove all MPI2.x standard items.
- A little weird to be able to pull back MPI1 removed items.
  - Lets remove these too at the same time.
- C++ bindings are seperate pull request. PR 5128 Goal is to have these removed as well.
  - Sent poll out - 12 of 41 responses. 1 of 12 has said they're using C++ binding, but not sure if it's accurate.
  - If C++ bindings are sufficently isolated we could move to a seperte repo.
  - But if no one is really using, lets just remove it all.
Lets turn off more building by default.
- Forum didn't REMOVE everything that was deprecated in MPI v3.0 standard.

Last week: OSHMEM v1.4 - not sure if we have to drop the depricated APIs, curious OMPI is dropping depricated APIs...
- Only remove things removed from the OSHMEM standard, not things Deprecated as "deprecated" means it will be removed from a future version of the standard. If some APIs were removed from the standard, then ask oshmem email list their thoughts.
- Xin should be able to push first version of OSHMEM v1.4 changes to master next week or so.
- Xin should be pushing today or tomorrow... It's been passing some simple tests.

Got compiler licenses for NAG compiler, and Absoft
- Both Fortran
- No progress.
Get copy of perl JSON, and put it on MTT.
- DONE