[mpiwg-rma] FW: [Mpi3-rma] [EXTERNAL] Re: MPI-3 UNIFIED model updates

[Jim Dinan]

On Wed, Aug 28, 2013 at 4:47 PM, Barrett, Brian W <bwbarre at sandia.gov>wrote:

> >>> Also, I think we are ignoring the point Jim raised: does OpenSHMEM
> >>> really need these semantics?
> >>
> >> I think this is a grey area of OpenSHMEM and my belief is that it really
> >> does need those semantics.
> >
> >Perhaps this is just an oversight in OpenSHMEM and can be fixed?
>
> I don't think it's an oversight.  Remember that OpenSHMEM, while a great
> leap forward from SGI's man pages, is still a fairly loose specification.
> There are definitely codes that spin on a completion word (or poll and
> move on to other things, where shmem_wait wouldn't work) in the wild, and
> they're considered correct codes.


What does this spinning look like?  Are any platform-specific operations
used?

 ~Jim.
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