[MPI3 Fortran] Request for a straw vote.

[Craig Rasmussen]

Very good.  I forgot about ASYNCHRONOUS.  So I think the problem is  
solved then.  Copy-in/copy-out doesn't matter for blocking calls and  
the ASYNCHRONOUS attribute will be used on the non-blocking calls.

-craig

On Jun 12, 2009, at 11:28 AM, Jim Xia wrote:

>
> mpi3-fortran-bounces at lists.mpi-forum.org wrote on 06/12/2009  
> 12:52:00 PM:
>
>
> >
> > However, there was an earlier discussion raised by Jim about how a
> > compiler might want to copy-in/copy-out even if for assumed-shape
> > arrays.  I think Jim's example had to do with copying vector sized
> > objects even though the user is only using a portion of a vector.
> >
> > So does DIMENSION(..) restrict copy-in/copy-out?
>
>
> I don't remember I raised discussion on this very topic, but this is  
> a valid argument.  In short, DIMENSION(..) alone will not restrict  
> copy-in/copy-out.  The most effective way to suppress copying is  
> through VOLATILE/ASYNCHRONOUS attribute on the dummy argument.
>
> Thanks
>
> Jim Xia
>
> XL Fortran Compiler Test
> IBM Toronto Lab at 8200 Warden Ave, Markham, On, L6G 1C7
> Phone (905) 413-3444  Tie-line 313-3444
> email: jimxia at ca.ibm.com
> D2/YF7/8200 /MKM
>
> http://www.ibm.com/software/awdtools/fortran/xlfortran
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