[mpiwg-tools] Change-log questions about tools issues in MPI-4.1

[Marc-André Hermanns]

Hi Rolf,

thanks for double checking this and for the hard work you put into the 
preparation of 4.1.

You might be right that this behavior may imply changes either in an 
implementation or in a tool (as any observable behavior will 
eventually be relied upon by someone).

I would therefore agree to a changelog and have opened a PR here:

https://github.com/mpi-forum/mpi-standard/pull/836

Cheers,
Marc-Andre

On 29.06.23 16:51, Rolf Rabenseifner wrote:
> Dear Marc-Andre and all,
> 
> I just checked all MPI-4.1 issues and related pull requests, whether
>   (1) they have,
>   (2) they have not, but should have,
>   (3) they should not have and have not
> a change-log entry.
> 
> Problematic is category (2).
> 
> I detected the following Issues / PRs and sorted in (1-3):
> 
> (3) #160 PR-161  ERRATA: Clarify behavior for invalid MPI_T binding arguments

So here it is (3) -> (2)

> (1) #443 PR-754  LIS entries in MPI_T chapter not reflecting IN vs. INOUT as defined in Term 2.3 chapter
> (3) #542 (PR-646) PR-795 #T Correct usage of the terms error and return codes in the tools chapter
> (3) #601 PR-734  Tools - Code examples improperly marked
> (3) #622 PR-734  Tools - Export "outcome is as if..." code fragments as proper examples
> (3) #674 PR-796  Tools chapter uses non-standard wildcard-notation for function names
> 
> As far as I understand, only Issue #160 / PR-161 can be problematic:
> 
> Are you sure that #160 does not cause
>   - that an implementor of an MPI library has to fix something, or
>   - that a user of the tools interface has to modify something in her/his tool,
>   - or a third party, like trainiers have to change there course material?
> 
> If there is no such risk, then it is okay to be quiet, i.e. not to provide a change-log entry.
> 
> I personally expect that there are no such risks and therefore the decision "no change-log" was correct.
> 
> What is your answer?

See above. The issue was triggered by a user binding to MPI_COMM_WORLD 
"too early" (i.e., before MPI initialization) and therefore at least 
that user now needs to change his/her tool. (Even though that might 
have been done quite some time ago).


If others disagree to this assessment, we can easily bin the 
Changelog, if not, we should wordsmith the Changelog entry as 
necessary in the July meeting.

Cheers,
Marc-Andre


> ----- Original Message -----
>> From: "MPI Tool WG" <mpiwg-tools at lists.mpi-forum.org>
>> To: "MPI Tool WG" <mpiwg-tools at lists.mpi-forum.org>
>> Cc: "Marc-Andre Hermanns" <hermanns at itc.rwth-aachen.de>
>> Sent: Thursday, June 29, 2023 1:44:57 PM
>> Subject: [mpiwg-tools] No call today (June 29, 2023)
> 
>> Dear all,
>>
>> due to a conflict with another meeting, I would cancel today's meeting.
>>
>> As a teaser for future meetings: Martin brought back
>> feedback/discussion notes from the Scalable Tools Workshop in Tahoe
>> with several topics for us to work on.
>>
>> https://dyninst.github.io/scalable_tools_workshop/petascale2023/assets/slides/outbriefs/ScalablaTools23-MPI-Breakout.pdf
>>
>> Cheers,
>> Marc-Andre
>> --
>> 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
>>
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> 

-- 
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

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