[Mpi-forum] Madrid hybrid slides: init/finalize

[Jeff Squyres (jsquyres)]

First mention of it is on slide 4, "Re-initionaliztion of MPI".  :-)

Then lots more discussion about it starting effectively with slide 7, e.g., "New INIT behavior ... If MPI is not currently initialized // Initialize MPI / start a new MPI epoch // This can happen multiple times in a process".

No code examples until late in the slides, though.



On Aug 26, 2013, at 2:22 PM, Wesley Bland <wbland at mcs.anl.gov> wrote:

> That sounds good to me. I just didn't see that in the slides until one of the corner cases.
> 
> Thanks,
> Wesley
> 
> 
> On Mon, Aug 26, 2013 at 1:20 PM, Pavan Balaji <balaji at mcs.anl.gov> wrote:
> 
> That's one of the proposed changes.
> 
> 
> On 08/26/2013 01:06 PM, Wesley Bland wrote:
> Am I mistaken in remembering that MPI doesn't allow an application to go
> in and out of MPI:
> 
> INIT
> ....
> FINALIZE
> ....
> INIT
> ....
> FINALIZE
> 
> I've looked at the standard and that's what Section 8.7 says to me. So
> am I correct in assuming that this will change that text to say that you
> can start, stop, and start new "MPI epochs"?
> 
> Thanks,
> Wesley
> 
> 
> On Mon, Aug 26, 2013 at 12:10 PM, Jeff Squyres (jsquyres)
> <jsquyres at cisco.com <mailto:jsquyres at cisco.com>> wrote:
> 
>     The hybrid working group will be hosting a plenary on Friday
>     afternoon in Madrid.
> 
>     We will be presenting a proposal on MPI_INIT/MPI_FINALIZE regarding
>     interaction with threads (going back to the use cases Jeff Hammond
>     raised at a prior Forum meeting), and nested MPI_INIT/MPI_FINALIZE.
>       This is not a formal reading; we're requesting Forum feedback on
>     the overall ideas.
> 
>     The slides are attached.  See you in Madrid.
> 
>     --
>     Jeff Squyres
>     jsquyres at cisco.com <mailto:jsquyres at cisco.com>
> 
>     For corporate legal information go to:
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> 
> 
> 
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> 
> -- 
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji
> 
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-- 
Jeff Squyres
jsquyres at cisco.com
For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/