(j3.2006) (SC22WG5.3888) [ukfortran] [MPI3 Fortran] MPI non-blocking transfers

Bill Long longb
Thu Jan 22 11:11:47 EST 2009



Adding the MPI list back into the reply.  Please use "reply all" for 
this discussion....

N.M. Maclaren wrote:
> On Jan 22 2009, Van Snyder wrote:
>   
>
>> One simple step toward solving the problem is to write an extra
>> interface layer that includes the argument, which then calls the real
>> MPI wait routine, not passing that argument.  Then declaring the buffer
>> and the dummy argument of the wait routine interface layer to be
>> ASYNCHRONOUS ought to work, according to the rules we already have in
>> place for Fortran asynchronous I/O.
>>     

The basic problem with adding a buffer argument to a variant of the 
MPI_wait routines is that the buffer variable may not be accessible in 
the scoping unit of the call.  This seems like a fatal flaw with this 
approach.

Cheers,
Bill




-- 
Bill Long                                   longb at cray.com
Fortran Technical Support    &              voice: 651-605-9024
Bioinformatics Software Development         fax:   651-605-9142
Cray Inc., 1340 Mendota Heights Rd., Mendota Heights, MN, 55120

            




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