[Mpi3-rma] MPI-3 UNIFIED model clarification

[Underwood, Keith D]

The point of UNIFIED was that we add a more useful model that worked in *some* places.

> -----Original Message-----
> From: Pavan Balaji [mailto:balaji at mcs.anl.gov]
> Sent: Friday, August 02, 2013 7:30 PM
> To: Underwood, Keith D
> Cc: Jed Brown; mpi3-rma at lists.mpi-forum.org
> Subject: Re: [Mpi3-rma] MPI-3 UNIFIED model clarification
> 
> 
> On 08/02/2013 08:27 PM, Underwood, Keith D wrote:
> > That was specifically *not* the point of unified.  The point of
> > unified was that "if the platform can support it, the user can get
> > something better".  Remember all those conversations about
> > synchronization using hands waving across the machine room?  Unless
> > you guys want to go get rid of UNIFIED?  There really isn't a point to
> > unified if you have to call MPI_Win_sync, is there?
> 
> Yes, I remember that discussion.  However, what I took away from that
> discussion was that the user *could* do something outside of MPI, not
> *must*, to ensure correct behavior.
> 
> If that was not the intention, then there needs to be a memory model where
> that's the case.
> 
>   -- Pavan
> 
> --
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji