WeeklyTelcon_20230411

Open MPI Weekly Telecon ---

Tuned and MCA parameter Issue
- Issue 11532 somehow related to Issue 11459
- Summary: Something that was in v4.x (CLI and MCA params) is now broken.
- We probably either need a code fix or a doc fix.
- We need an answer by v5.0.0 as this is a break in ShellScripts compatibility.
New issue came out of this
- Summary: Used to be two different formats of files:
  - Tuned files, and MCA param files
  - Did similar things, but two different formats.
  - PRTE eliminated one of the formats entirely
  - On OMPI side, have a minor incompatibility here.
    - Right now they get no warning that the file's not being read.
    - MINIMUM: Should emit an error (human is asking us to do something)
    - Might need to be fix in schizo
  - Discussion - do we want to put back 2nd flavor of MCA param file.
    - A little weird we have silent translation for everything except this.
- Luke Volunteers to make the Issue
MPIR Shim (https://github.com/openpmix/mpir-to-pmix-guide) went away.
- Howard pushed repo to somewhere.
- Howard will hook it up to CI for some testing.
- MPIR shim has some docs 12.7, it just need some new URL and info.

release RC11 last week. Please test.
Issue reported that map-by not working.
OFI nic selection broken on v5.0.x
- Fix itself updated the PMIx and PRTE pointers
- Testing this patch right now with RC11 - Thomas
python needs fix in PMIx and then bringing this into
- Come to some conslusion as to what is needed and can be backported?
PMIx in main has startup hang. 3%-20% failures.
- Luke see the hangs in OMPI main, but not as much in OMPI v5
- OMPI main when point to PMIx main
- Tommy - one of the reasons why we're reluctant to push PMIx pointers.
- Whatever fixes that go into PMIx
We'd talked about supplying some docs about how HAN is great, and why we're enabling it for v5.0.0 by default.
- Like to include instructions on how to reproduce as well for users.
- Section 5 Open MPI specific Features - good to highlight
  - Geoff emailed George, asking if they can.
  - George just linked in #general slack channel. 6x increase in speed.
  - George is asking for volunteers.
- Ask about sitable paper(s)