[mpiwg-tools] Questions for the tools community

[Jeff Squyres (jsquyres)]

Something changed and I'm sorry, I can't be there this Thursday.  I'm sorry!

Can I sync up with someone before Thursday to explain what I'm asking about?


> On Aug 29, 2019, at 11:25 AM, Jeff Squyres (jsquyres) <jsquyres at cisco.com> wrote:
> 
> Sure, I can be there.
> 
> Thanks!
> 
> 
>> On Aug 29, 2019, at 11:05 AM, Marc-André Hermanns via mpiwg-tools <mpiwg-tools at lists.mpi-forum.org> wrote:
>> 
>> Hi Jeff,
>> 
>> sorry about the silence. As Martin already said, your mail led to some
>> internal discussion and we wanted to reach out beyond the tools people
>> on the mailing list because it seems no-one on the list is currently
>> able to handle Fortran descriptors, but we failed to keep you informed.
>> 
>> Would you be available on *Sep 19* for the tools call? That would give
>> us some time to contact some people outside the working group and
>> they'd have time to either give feedback or organize their schedules
>> in a way to attend the call.
>> 
>> Cheers,
>> Marc-Andre
>> 
>> On 29.08.19 16:53, Martin Schulz via mpiwg-tools wrote:
>>> Hi Jeff,
>>> 
>>> Due to the summer break and vacation time, especially in Europe, we
>>> haven’t had a chance to address this - Marc-Andre had suggested a
>>> tools call on this for after EuroMPI and then we’ll know more (we need
>>> to get tool implementors to the table who are not part of the WG). 
>>> 
>>> Personally, though, I fear you are right with your assumption, but I
>>> am happy to be proven wrong.
>>> 
>>> Martin
>>> 
>>> 
>>> —
>>> Prof. Dr. Martin Schulz, Chair of Computer Architecture and Parallel
>>> Systems
>>> Department of Informatics, TU-Munich, Boltzmannstraße 3, D-85748 Garching
>>> Member of the Board of Directors at the Leibniz Supercomputing Centre
>>> (LRZ)
>>> Email: schulzm at in.tum.de <mailto:schulzm at in.tum.de>
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>>> On 29. Aug 2019, at 16:46, Jeff Squyres (jsquyres) via mpiwg-tools
>>>> <mpiwg-tools at lists.mpi-forum.org
>>>> <mailto:mpiwg-tools at lists.mpi-forum.org>> wrote:
>>>> 
>>>> Should I infer from the lack of reply that no tools properly handle
>>>> either Fortran descriptors or the descriptor-based symbols?
>>>> 
>>>> 
>>>> 
>>>>> On Aug 25, 2019, at 11:31 AM, Jeff Squyres (jsquyres) via
>>>>> mpiwg-tools <mpiwg-tools at lists.mpi-forum.org
>>>>> <mailto:mpiwg-tools at lists.mpi-forum.org>> wrote:
>>>>> 
>>>>> In Open MPI, we are finally working towards supporting Fortran
>>>>> descriptors for choice buffers (i.e., "TYPE(*), DIMENSION(..)").
>>>>> 
>>>>> Per MPI-3.1 p613 table 17.1, this means ***changing all the
>>>>> back-end symbols*** that are used for PMPI-style interception.
>>>>> 
>>>>> A concrete example:
>>>>> 
>>>>> - in mpif.h / the mpi module, MPI_SEND will become MPI_SEND_FTS
>>>>> - in the mpi_f08 module, MPI_SEND will become MPI_SEND_F08TS
>>>>> 
>>>>> I.e., anywhere the application calls MPI_SEND, it will be
>>>>> transmogrified to either MPI_SEND_FTS or MPI_SEND_F08TS.  And the
>>>>> choice buffer passed will be a descriptor (which may therefore be a
>>>>> subarray, not a contiguous buffer), not a naked pointer.
>>>>> 
>>>>> Here's my questions:
>>>>> 
>>>>> 1. Do any tools support Fortran descriptors as choice buffers?
>>>>> 2. Do any tools intercept the symbols as described in MPI-3.1 table
>>>>> 17.1?
>>>>> 
>>>>> -- 
>>>>> Jeff Squyres
>>>>> jsquyres at cisco.com <mailto:jsquyres at cisco.com>
>>>>> 
>>>>> _______________________________________________
>>>>> mpiwg-tools mailing list
>>>>> mpiwg-tools at lists.mpi-forum.org
>>>>> https://lists.mpi-forum.org/mailman/listinfo/mpiwg-tools
>>>> 
>>>> 
>>>> -- 
>>>> Jeff Squyres
>>>> jsquyres at cisco.com <mailto:jsquyres at cisco.com>
>>>> 
>>>> _______________________________________________
>>>> mpiwg-tools mailing list
>>>> mpiwg-tools at lists.mpi-forum.org
>>>> https://lists.mpi-forum.org/mailman/listinfo/mpiwg-tools
>>> 
>>> 
>>> _______________________________________________
>>> mpiwg-tools mailing list
>>> mpiwg-tools at lists.mpi-forum.org
>>> https://lists.mpi-forum.org/mailman/listinfo/mpiwg-tools
>>> 
>> 
>> -- 
>> Dr. rer. nat. Marc-André Hermanns
>> 
>> IT Center
>> Group: High Performance Computing
>> Division: Computational Science and Engineering
>> RWTH Aachen University
>> Seffenter Weg 23
>> 52074 Aachen
>> Phone: +49 241 80-24381
>> hermanns at itc.rwth-aachen.de
>> www.itc.rwth-aachen.de
>> 
>> _______________________________________________
>> mpiwg-tools mailing list
>> mpiwg-tools at lists.mpi-forum.org
>> https://lists.mpi-forum.org/mailman/listinfo/mpiwg-tools
> 
> 
> -- 
> Jeff Squyres
> jsquyres at cisco.com
> 


-- 
Jeff Squyres
jsquyres at cisco.com