[mpich-discuss] Deadlock in MPI_Ibarrier over ch3:sock

[Pavan Balaji]

On 01/23/2013 03:01 PM US Central Time, Jeff Hammond wrote:
>> We intend to provide support for a default MPI_COMM_SELF implementation of
>> shared memory windows in ch3.  Shared memory windows are fully implemented
>> in Nemesis, but not ch3, so if you were to try using them right now with
>> sock, you would get a not implemented error.  If anyone needs this
>> (presumably for portability), I'd be happy to bump the priority on ticket
>> #1666.
> 
> How is this not a no-op implementation for MPI_COMM_SELF?  All you
> need to support is load-store on local memory, no?

Actually, you need to support RMA as well, but it should be equivalent
to MPI_WIN_ALLOCATE.

 -- Pavan

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji