[Mpi3-rma] mpi3-rma post from bradc at cray.com requires approval

[William Gropp]

I'd like to get all of the various claims and constraints documented  
in one place.  I've created a page on the wiki into which we should  
place these constraints, along with the reference. That page is

https://svn.mpi-forum.org/trac/mpi-forum-web/wiki/mpi3-rma-goals-and-constraint

The rule for this page is that the statement should be concise and  
precise and they should not claim that one approach is better than  
another.  Feel free to add additional top-level items.  I'm fully  
aware that the intersection of these requirements may produce the null  
set; in fact, I think that is part of the problem.  Putting a summary  
on the web page, rather than in these email exchanges, will help us  
move forward.

Bill

On May 30, 2010, at 8:05 AM, Underwood, Keith D wrote:

> Well, when Jeff and Bill successfully argued against a definition  
> for atomicity of access for conflicting accesses beyond "undefined",  
> we lost direct support for the UPC memory model.  After that, I no  
> longer cared about ordering and Jeff was still arguing vehemently  
> against ordering, so my understanding was that we had dropped  
> ordering.  I am not sure why we would support ordering without an  
> access granularity definition.
>
> Keith
>
>
> ----- Original Message -----
> From: mpi3-rma-bounces at lists.mpi-forum.org <mpi3-rma-bounces at lists.mpi-forum.org 
> >
> To: MPI 3.0 Remote Memory Access working group <mpi3-rma at lists.mpi-forum.org 
> >
> Cc: Brad Chamberlain <bradc at cray.com>
> Sent: Sat May 29 22:38:03 2010
> Subject: Re: [Mpi3-rma] mpi3-rma post from bradc at cray.com requires  
> approval
>
>
> On 05/29/2010 06:24 AM, Underwood, Keith D wrote:
>> 1) Ordering:
>> 	a) Ordered from a given source to a given address on a given  
>> target (unordered otherwise), or
>> 	b) completely unordered
>
> My understanding was that we were providing both 1a and 1b. Or rather,
> MPI-2 already gives 1b, and we are proposing 1a together with it (not
> instead of it).
>
>  -- Pavan
>
> -- 
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji
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William Gropp
Deputy Director for Research
Institute for Advanced Computing Applications and Technologies
Paul and Cynthia Saylor Professor of Computer Science
University of Illinois Urbana-Champaign