On 07/29/2013 03:05 PM, Sur, Sayantan wrote:

I agree with the sentiment, also with the implementation issue of UNIFIED with multi-rail. I'm not certain that a model exists in between UNIFIED and SEPARATE. Either you are able to observe changes in memory without further MPI calls, or not. Pavan do you have a specific model in mind?

Yes. I'd like a model where the user has to explicitly do a WIN_SYNC at the target. I agree that UNIFIED's current definition is stronger than this. Hence the request for either a new memory model or to weaken UNIFIED's definition. -- Pavan -- Pavan Balaji http://www.mcs.anl.gov/~balaji