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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I am sorry Jeff, there was no progress on my front wrt ABI.<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> mpi3-abi-bounces@lists.mpi-forum.org
[mailto:mpi3-abi-bounces@lists.mpi-forum.org] <b>On Behalf Of </b>Jeff Brown<br>
<b>Sent:</b> Thursday, December 11, 2008 9:21 AM<br>
<b>To:</b> MPI 3.0 ABI working group<br>
<b>Cc:</b> craig Rasmussen; ddd@lanl.gov; Ralph Castain<br>
<b>Subject:</b> Re: [Mpi3-abi] Open MPI and ABI<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>All,<br>
<br>
At the last meeting I attended (Dublin) we discussed developing a prototype
"morph" ABI layer with initial implementation targeting the December
meeting. Let's take stock of this effort when we meet next week. As
I recall, Ezra offered to lead the windows implementation, and Alexander
linux. This exercise is meant to expose some of the implementation
details and help drive us toward a detailed standard proposal we can take to
the larger group.<br>
<br>
Ezra and Alexander, please brief us on this effort when we meet next Wednesday.<br>
<br>
>From the Dublin meeting:<br>
•MPI ABI standard, separate from MPI API standard, but under the umbrella
of the MPI Forum<br>
•Dynamic link is the main objective (binary compatibility)<br>
•Startup (mpirun/mpiexec) is a secondary objective<br>
•Include all major language bindings in the ABI standard (C, C++,
Fortran) as we go<br>
•Tied to MPI 2.1 and forward<br>
•Implementers may choose to comply (or not)<br>
•May be implemented as a morph layer or native<br>
•Initial reference implementation will be a morph layer (tbd who
provides)<br>
•May be different per platform (Linux, Windows, …)<br>
•Different voting rules separate from MPI API forum (?)<br>
•Need participation from major implementors in order to make progress<br>
<br>
mpi.h: MPICH 2 (1.0.7) as base with mods as needed (e.g. max values for compile
time values used in declarations)<br>
Proceed with a reference morph layer implementation targeting (at least) MPICH
2.0, OpenMPI <br>
Load a different module and it just works<br>
Demonstrate with a ring program<br>
Defer startup consideration<br>
<br>
Proof of concept reference morph layer implementations:<br>
•Flesh out details by writing some code<br>
•Linux on X86-64 cluster Red Hat Linux/SUSE<br>
•Windows on X86-64 cluster<br>
•Test against ring program<br>
•<b>Bring back to the December forum meeting<br>
<br>
</b>see ya next week<br>
<br>
Jeff<o:p></o:p></p>
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