Hello Geoffrey Paulsen,
Can you share new release date of 5.0? I wonder what it means.
2. Open-MPI v5.0 branch date pushed back to May 14th
(Geoffrey Paulsen)
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Today's Topics:
1. ORTE->PRRTE: some consequences to communicate to users
(Ralph Castain)
2. Open-MPI v5.0 branch date pushed back to May 14th
(Geoffrey Paulsen)
----------------------------------------------------------------------
Message: 1
Date: Tue, 28 Apr 2020 19:28:23 +0000
From: Ralph Castain <[email protected]>
To: OpenMPI Devel <[email protected]>
Subject: [OMPI devel] ORTE->PRRTE: some consequences to communicate to
users
Message-ID:
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So here is an interesting consequence of moving from ORTE to PRRTE. In ORTE,
you could express any mapping policy as an MCA param - e.g., the following:
OMPI_MCA_rmaps_base_mapping_policy=core
OMPI_MCA_rmaps_base_display_map=1
would be the equivalent of a cmd line that included "--map-by core
--display-map"
When defining what we wanted on the OMPI v5 cmd line, we removed some options
like --display-map and replaced them with modifiers, so the above would have
been replaced with:
OMPI_MCA_rmaps_base_mapping_policy=core:display
The move to PRRTE, however, means more than just changing the "OMPI" to
"PRRTE". PRRTE doesn't support setting the default mapping policy to include
"report" as that would mean we would be reporting the map for every job that
was ever launched. Definitely not something the persistent DVM users would
appreciate!
So if you put:
PRRTE_MCA_rmaps_default_mapping_policy=core:display
(note the name change!!!) in your environment, you are going to get an error
when you execute "mpirun":
=====
A mapping policy modifier was provided that is not supported as a default value:
Modifier: display
You can provide this modifier on a per-job basis, but it cannot be the default
setting.
=======
And you will error out. However, it is perfectly okay to put "--map-by
core:display" on your cmd line - that is legit and understood as it only
applies to that specific job.
It's these changes, plus the name changes (e.g., we replace "base" with
"default" to emphasize these are ONLY the default settings), that will need to
be communicated.
Ralph
------------------------------
Message: 2
Date: Tue, 28 Apr 2020 21:12:47 +0000
From: "Geoffrey Paulsen" <[email protected]>
To: [email protected]
Subject: [OMPI devel] Open-MPI v5.0 branch date pushed back to May
14th
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