[Mpi3-rma] Disp_unit in allocate_shared should be returned by win_shared_query?

Pavan Balaji balaji at mcs.anl.gov
Wed Jul 18 13:08:43 CDT 2012

On 07/18/2012 01:02 PM, Torsten Hoefler wrote:
> Jim,
>> Is one process' disp_unit meaningful at another process?  I thought that
>> this is not the case.  MPI provides no other routines to query another
>> process' disp_unit.
> It is something that the user is passing in. I don't know of a
> particular use-case but we can query all other arguments that each
> process passed. One more integer seemed safe to me.
>> Also, what meaning does a disp_unit have in the context of load/store
>> operations that will result from win_shared_query?
> Nothing.
>> Maybe I'm missing something, but this doesn't seem necessary.
> Well, it's better to have it than to introduce it with a different name
> later. That was my main motivation. One could also use it in a library
> context to query. But that's weak, I know.

This doesn't seem critical, and can always be added in MPI-3.1 if we 
find it necessary.  No reason to rush it.

  -- Pavan

Pavan Balaji

More information about the mpiwg-rma mailing list