Hi Marc-Andre,

Yes, we probably should move this discussion to tools from now on since it's getting into more technical details. Please send the information about your wrapper generator to both me and Martin.

Thanks!
Kathryn


I haven't tried it with PnMPI (I'll try to do that before the meeting
in San Jose), but we scan the mpi.h file. We have found this
generally to be a good idea, since not always all routines are
implemented and the tool works for MPI-1 and MPI-2 alike.

In Scalasca and Score-P, we inspect the MPI library for the presence each PMPI symbol and then we only create wrappers for those calls where we found valid PMPI symbols. (When the prototypes are mangle, this would definitely need to be adapted.)

The prototypes are predefined in an XML file. There, we also define additional attributes, such as whether a parameter in "input, output, or both".

From a tools community point of view it would be good to come with
such a wrapper generator once and then have everyone use it, which
would not only eliminate this issue, but also make the Fortran issue
much simpler.

As different tools groups might have different interests, it would be quite an undertaking. Still, it would definitely be good not to reinvent the wheel several times.

The tools WG is planing to have a discussion in San Jose on whether
we can create such a wrapper infrastructure that actually produces
Fortran implementations along with the C implementations, which may
make the whole symbol naming issue unnecessary. Adding a C version to
such a wrapper system would be trivial.

Unfortunately, I won't be in San Jose. Maybe I'll prime someone (Martin? Kathryn?) with what our wrapper generator can and cannot do, as input into the discussion?

Cheers,
Marc-Andre

PS: Should we move this discussion to the tools mailing list?
--
Marc-Andre Hermanns
German Research School for
Simulation Sciences GmbH
c/o Laboratory for Parallel Programming
52062 Aachen | Germany

Tel +49 241 80 99753
Fax +49 241 80 6 99753
Web www.grs-sim.de

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______________________________________________________________
Kathryn Mohror, kathryn@llnl.gov, http://people.llnl.gov/mohror1
CASC @ Lawrence Livermore National Laboratory, Livermore, CA, USA