[MPIWG Fortran] Question about 388 errata

[Bill Long]

On 9/18/13 6:03 AM, Rolf Rabenseifner wrote:
> I propose in
> https://svn.mpi-forum.org/trac/mpi-forum-web/attachment/ticket/388/errata-30-ticket388-2013-09-12.pdf
>
> Page 7 lines 14-15 read
>
>    For TS 29113 quality, new routines
>    are needed only for routines with choice buffer arguments.
>
> but should read
>
>    If the Fortran compiler implements TS 29113, then new routines
>    are needed only for routines with choice buffer arguments.

This seems to be conflating two concepts.  Whether the Fortran compiler 
supports TS 29113 depends on the compiler vendor.  But this is an Advice 
to the MPI library vendors.  The sentence seems to read that having at 
least one Fortran vendor supporting TS 29113 forces MPI vendors to 
supply the extra routines.  If that is the intent, then the first clause 
of the sentence is unnecessary, since there are already two compilers 
with TS 29113 support.

The version I proposed:

"To take advantage of the features enabled by TS 29113, new routines are 
needed only for routines with choice buffer arguments."

unlinks the requirements and allows the MPI vendor to not implement the 
extra routines and choose to ignore that fact that some of its users 
might have a Fortran compiler with TS support.

I'm not sufficiently informed about earlier MPI discussions to know 
which is intended, but wanted to point out the distinction.   Rolf's 
statement is essentially a requirement that all MPI vendors support the 
new routines.  Mine is just a statement of fact and does not impose a 
requirement on the vendors.

I'm satisfied with either intention, since I use both of the new 
compilers and would always want (as a user, and provide as an MPI 
vendor) the new routines anyway.

Cheers,
Bill




>
> (We always use the short-cut TS 29113, the long version is in the bib-list)
>
> Jeff S., Jeff H., Craig, Bill L.,
>
>      please give an explicit okay (or a better text).
>
> Best regards
> Rolf
>
>
>
> ----- Original Message -----
>> From: "William Gropp" <wgropp at illinois.edu>
>> To: longb at cray.com, "MPI-WG Fortran working group" <mpiwg-fortran at lists.mpi-forum.org>
>> Sent: Tuesday, September 17, 2013 1:04:57 AM
>> Subject: Re: [MPIWG Fortran] Question about 388 errata
>> What I need is a specific replacement for that sentence to which the
>> WG agrees. Â Suggestions?
>>
>>
>> Bill
>>
>>
>>
>>
>>
>> William Gropp
>> Director, Parallel Computing Institute
>> Deputy Director for Research
>> Institute for Advanced Computing Applications and Technologies Thomas
>> M. Siebel Chair in Computer Science
>>
>>
>> University of Illinois Urbana-Champaign
>>
>>
>>
>>
>>
>>
>> On Sep 16, 2013, at 11:49 AM, Bill Long wrote:
>>
>>
>>
>> I think the intent is "To take advantage of the features enabled by TS
>> 29113, new routines are needed...". Â The main thrust of the TS, as far
>> as MPI is concerned, is the capability to pass an argument by (pointer
>> to a ) descriptor, rather than as a plain address. Â This is only done
>> for choice buffer arguments.
>>
>> The actual side effect of this is that for routines that do not have
>> choice buffer arguments (MPI_Barrier.... ) Â the implementation layer
>> in the C library is the same as before. Â Only for the ones with choice
>> buffer arguments is there a need for both the legacy version (with a
>> (void *) format parameter) and the new one that handles pointer to a
>> descriptor.
>>
>> Cheers,
>> Bill
>>
>>
>> On 9/16/13 11:39 AM, Jeff Hammond wrote:
>>
>>
>> I think "the Fortran compiler implements ISO/IEC TS 29113:2012" is
>> more
>>
>>
>> accurate.
>>
>>
>>
>>
>>
>> Jeff
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> On Mon, Sep 16, 2013 at 10:56 AM, William Gropp < wgropp at illinois.edu
>>
>>
>> < mailto:wgropp at illinois.edu >> wrote:
>>
>>
>>>
>>
>>
>>> There was one phrase that I found imprecise. Â Just what does "TS
>>
>>
>> 29113 quality" mean? Â I can guess, but the standard should not make me
>>
>>
>> guess.
>>
>>
>>>
>>
>>
>>> Bill
>>
>>
>>>
>>
>>
>>> William Gropp
>>
>>
>>> Director, Parallel Computing Institute
>>
>>
>>> Deputy Director for Research
>>
>>
>>> Institute for Advanced Computing Applications and Technologies
>>
>>
>>> Thomas M. Siebel Chair in Computer Science
>>
>>
>>> University of Illinois Urbana-Champaign
>>
>>
>>>
>>
>>
>>>
>>
>>
>>>
>>
>>
>>>
>>
>>
>>>
>>
>>
>>> _______________________________________________
>>
>>
>>> mpiwg-fortran mailing list
>>
>>
>>> mpiwg-fortran at lists.mpi-forum.org
>>
>>
>> < mailto:mpiwg-fortran at lists.mpi-forum.org >
>>
>>
>>> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-fortran
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> --
>>
>>
>> Jeff Hammond
>>
>>
>> jeff.science at gmail.com < mailto:jeff.science at gmail.com >
>>
>>
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>>
>>
>> mpiwg-fortran mailing list
>>
>>
>> mpiwg-fortran at lists.mpi-forum.org
>>
>>
>> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-fortran
>>
>>
>>
>>
>> --
>> Bill Long                                            longb at cray.com
>> Fortran Technical Support    &                 voice: 651-605-9024
>> Bioinformatics Software Development            fax:   651-605-9142
>> Cray Inc./Cray Plaza, Suite 210/380 Jackson St./St. Paul, MN 55101
>>
>>
>> _______________________________________________
>> mpiwg-fortran mailing list
>> mpiwg-fortran at lists.mpi-forum.org
>> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-fortran
>>
>>
>> _______________________________________________
>> mpiwg-fortran mailing list
>> mpiwg-fortran at lists.mpi-forum.org
>> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-fortran
>

-- 
Bill Long                                           longb at cray.com
Fortran Technical Support    &                 voice: 651-605-9024
Bioinformatics Software Development            fax:   651-605-9142
Cray Inc./Cray Plaza, Suite 210/380 Jackson St./St. Paul, MN 55101