[mpiwg-p2p] Next meeting: 19th January 2015 11am Central US

[Jeff Hammond]

I'd like to discuss https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/471.

Jeff

On Fri, Jan 16, 2015 at 4:34 AM, Daniel Holmes <dholmes at epcc.ed.ac.uk> wrote:
> Hi All,
>
> The next point-to-point teleconference will be on Monday 19th January 2015
> at 11am Central US via webex.
>
> Connection details are on the point-to-point wiki page:
> https://svn.mpi-forum.org/trac/mpi-forum-web/wiki/PtpWikiPage
>
> Agenda:
> 1) New INFO keys - specifically the "can INFO keys change the semantic
> behaviour of MPI?" issue (see summary from Jim below)
> 2) Progress on Arecv and Fsend
> 3) Other stuff?
>
> Cheers,
> Dan.
>
> On 12/01/2015 15:39, Jim Dinan wrote:
>>
>> Hi All,
>>
>> Apologies for missing the meeting.  There was a lot of discussion at the
>> Forum about the validity of restricting the application's behavior using
>> info keys (or, if you prefer, the application asserting its behavior through
>> info keys).  Folks indicated that this qualifies as a semantic change for
>> the given communicator, which is forbidden by Section 6.4.4 and made more
>> complicated because MPI_Comm_dup propagates info keys.
>>
>> In response to this feedback, I started working on a straw man
>> communicator assertions interface that would allow the application to assert
>> what its behavior will be.  I will prepare this for discussion at a future
>> WG meeting.
>>
>> In parallel, I have had discussions with others who feel that the opinion
>> expressed at the Forum meeting is incorrect; that it should be valid to
>> provide hints on application behavior through info keys.
>>
>> At the same time, the straw vote at the December meeting indicated that
>> the Forum as a whole would like to pursue this capability for the MPI
>> standard.  So, much more discussion and debate is needed.  Looking forward
>> to it,
>>
>>  ~Jim.
>
>
> --
> Dan Holmes
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-- 
Jeff Hammond
jeff.science at gmail.com
http://jeffhammond.github.io/