[MPI3 Fortran] [Fwd: Library-based ASYNCHRONOUS I/O and SYNC MEMORY]

[Aleksandar Donev]

On Monday 08 September 2008 09:29, Jeff Squyres wrote:
> Or does noopt_begin() also disable array subset copies?
You have hit the nail here. These kinds of proposals always seem simpler at 
first then they really are. You have to integrate then into the language so 
they not only make sense but work with all the other language features. It is 
not easy, and if you ask for too much you will get nothing (this is what 
happened to interval arithmetic folks some time ago).
You are right that SYNC MEMORY is expensive, a big hammer, and one can do 
better. But we did not do SYNC MEMORY(variable) for coarrays (or some similar 
alternative) exactly because it was hard to figure out all the details in the 
time and resources available.
Best,
Aleks
 
-- 
Aleksandar Donev, Ph.D.
Lawrence Postdoctoral Fellow @ Lawrence Livermore National Laboratory
High Performance Computational Materials Science and Chemistry
E-mail: donev1 at llnl.gov
Phone: (925) 424-6816  Fax: (925) 423-0785
Address: P.O.Box 808, L-367, Livermore, CA 94551-9900
Web: http://cherrypit.princeton.edu/donev