[mpiwg-hybridpm] Hybrid telecon fiasco

[Jeff Hammond]

Would it make it easier to just require MPI_THREAD_MULTIPLE here?  Is
that not the only _reasonable_ use case?

Sorry if I am bringing a dead horse back to life so we can beat it to
death again.

Jeff

On Mon, Apr 7, 2014 at 1:07 PM, Jim Dinan <james.dinan at gmail.com> wrote:
> Every process in a communicator has its own set of attributes.  Seems
> natural that this would be extended to endpoints.  They don't propagate when
> the endpoints communicator is created, so you would need to set them on each
> endpoint.
>
>  ~Jim.
>
>
> On Mon, Apr 7, 2014 at 1:27 PM, Jeff Squyres (jsquyres) <jsquyres at cisco.com>
> wrote:
>>
>> More to the point -- did we decide that if you create_endpoints and get N
>> local communicators out, are there N local copies of each of the attributes?
>> Or just 1 copy?
>>
>> I.e., does the attribute copy callback get invoked N times or 1 time?
>>
>> This may be in the text already -- forgive me if it is -- but I should
>> think that there should be a symmetry between attribute copy/creation and
>> destruction with regards to endpoint-created communicator handles.
>>
>>
>>
>> On Apr 7, 2014, at 1:21 PM, "Balaji, Pavan" <balaji at anl.gov> wrote:
>>
>> >
>> > On Apr 7, 2014, at 12:09 PM, Jim Dinan <james.dinan at gmail.com> wrote:
>> >> Dan suggested a third approach where we leave the Comm_free semantic
>> >> unchanged and add a new function, MPI_Comm_free_endpoints(MPI_Comm
>> >> comm_handles[], int my_num_ep), that has symmetry with
>> >> Comm_create_endpoints.  An endpoints communicator can be freed with either
>> >> Comm_free or Comm_free_endpoints.  They differ in their concurrency
>> >> requirement.
>> >
>> > What happens to the attribute callbacks when you use
>> > MPI_Comm_free_endpoints?
>> >
>> >  — Pavan
>> >
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>>
>>
>> --
>> Jeff Squyres
>> jsquyres at cisco.com
>> For corporate legal information go to:
>> http://www.cisco.com/web/about/doing_business/legal/cri/
>>
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>
>
>
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-- 
Jeff Hammond
jeff.science at gmail.com