Do these need to be relaxed in MPI-3 as well to make them undefined for Put/Get? It might be OK to make it undefined in Accumulate as well. -- Pavan On 04/28/2011 12:07 AM, Rajeev Thakur wrote:

341:2 "The target_datatype may not specify overlapping entries in the target buffer." (for Put)

342:38 "The origin_datatype may not specify overlapping entries in the origin buffer." (for Get)

346:12 "target_datatype must not specify overlapping entries" (for Accumulate)

On Apr 27, 2011, at 3:51 PM, Pavan Balaji wrote:

...

Page 339 lines 21-24 of MPI-2.2 states the following:

"It is erroneous to have concurrent confl icting accesses to the same memory location in a window; if a location is updated by a put or accumulate operation, then this location cannot be accessed by a load or another RMA operation until the updating operation has completed at the target."

What does this mean when I do PUT with a datatype with overlapping buffers? Is that valid or erroneous?

-- Pavan

-- Pavan Balaji http://www.mcs.anl.gov/~balaji _______________________________________________ mpi3-rma mailing list [email protected] http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-rma

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