[mpiwg-p2p] Next meeting: 10th October 2016 11am Central US

[Jim Dinan]

We could state that the output from get_info is implementation defined.
With the caveat that a user must be able to pass the output from get_info
to a subsequent communicator creation call and get back a communicator with
the same behavior as the original one.

On Mon, Oct 17, 2016 at 12:06 PM, Dan Holmes <dholmes at epcc.ed.ac.uk> wrote:

> Hi Jim,
>
> Another thought that occurred to me was getting rid of get_info - in
> favour of using the MPI_T interface to figure out what the MPI library has
> actually done. There is a well-defined semantic for MPI_T variables w.r.t.
> when can the value change, what variables exist, what do particular values
> of particular variables mean, etc.
>
> We could propose to standardise some MPI_T variables, such as
> MPI_ANY_TAG_is_supported or MPI_ANY_TAG_is_permitted, to replace the
> get_info feedback mechanism.
>
> Cheers,
> Dan.
>
> On 17 Oct 2016, at 16:49, Jim Dinan <james.dinan at gmail.com> wrote:
>
> Ahh crud, sorry I missed this meeting.  I've got the next one on my
> calendar and should be there.
>
> I was recently telling a colleague about this get_info stuff and he made a
> suggestion that initially sounded nuts, but is becoming more appealing.
> Can we just remove set_info?  Many of the challenges we have are caused by
> this function, and yet its value is questionable.  What do you think?
> Worth looking into?
>
>  ~Jim.
>
> On Fri, Oct 7, 2016 at 4:24 AM, Dan Holmes <dholmes at epcc.ed.ac.uk> wrote:
>
>> Hi all,
>>
>> The next point-to-point teleconference will be on Monday 10th October
>> 2016 at 11am Central US via webex.
>>
>> Connection details are on the p2p wiki:
>> https://github.com/mpiwg-p2p/p2p-issues/wiki
>>
>> Agenda:
>>
>> 1) Deprecation of send cancel (issue #26): at the Sept 2016 meeting, Rolf
>> correctly pointed out multiple additional administrative changes that are
>> needed for this. I have a list of these changes and I am working through
>> them. Once that is done, we will need 4 reviewers (Rolf + 3).
>>
>> 2) Communicator assertions (issue #11): at the Sept 2016 meeting, Pavan
>> et al raised the valid objection that fixing the train-wreck of
>> INFO_GET/SET may have knock-on effects on this and so we should delay the
>> vote on it until we have the full picture.
>>
>> 3) Fixing INFO_GET/SET (issue #new): Jim and I have discussed a plan to
>> get this moving.
>>
>> Slides from Sept 2016 meeting with notes on discussion and way forward:
>> https://docs.google.com/presentation/d/10EPCx2LuJ0BWCeUXIG3p
>> XJjqQs1tlnlO-6TJXIC8G8Q/edit?usp=sharing
>>
>> In addition to our next meeting (10th Oct), we will have 24th Oct and 7th
>> Nov before 21st Nov, which is the 2-week deadline for the next face-to-face
>> meeting.
>>
>> Plan:
>> Withdraw #11 from vote on 23rd Sept. [DONE]
>> Create #new and produce a first draft of the text for the Standard. [IN
>> PROGRESS]
>> Discuss at the meeting on 10th Oct.
>> Adjust text for the Standard and produce a first draft of the slides for
>> presenting at the next face-to-face.
>> Discuss at the meeting on 24th Oct.
>> Find and fix all the references and stuff that's needed for a proper
>> proposal (Rolf-proofing).
>> Discuss at the meeting on 7th Nov.
>> Final adjustments for #new, text, and slides.
>> Announce #11 (1st vote) and #new (reading) to mpi-forum list by 21st Nov.
>>
>> If we discover during the work on #new that #11 needs to be adjusted then
>> we can re-start its formal procedure with a reading in December.
>>
>>
>>
>> Cheers,
>> Dan.
>>
>> --
>> Dan Holmes
>> Applications Consultant in HPC Research
>> EPCC, The University of Edinburgh
>> James Clerk Maxwell Building
>> The Kings Buildings
>> Peter Guthrie Tait Road
>> Edinburgh
>> EH9 3FD
>> T: +44(0)131 651 3465
>> E: dholmes at epcc.ed.ac.uk
>>
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>>
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>
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