[mpiwg-sessions] PMIx Group status update

[Ralph H Castain]

Should have also noted that I updated the web page describing these new functions: https://pmix.org/pmix-standard/pmix-groups/

I had to slightly modify the PMIx_Group_join[_nb] APIs, and there are a couple of “implementation notes”


> On Aug 29, 2018, at 11:29 AM, Ralph H Castain via mpiwg-sessions <mpiwg-sessions at lists.mpi-forum.org> wrote:
> 
> Hi folks
> 
> I promised on the last call to keep people apprised of my progress. I have implemented the collective versions of the new APIs (PMIx_Group_construct/destruct) and have updated the PMIx_Fence operation to look for group names, substituting the group members into the array of participants. This all appears to be working correctly.
> 
> The PR for it is here: https://github.com/pmix/pmix/pull/826
> or the branch itself: https://github.com/rhc54/pmix-master/tree/topic/group
> 
> You can see an example use of the code here: https://github.com/rhc54/pmix-master/blob/topic/group/examples/group.c
> 
> I’m now working on the async APIs (PMIx_Group_invite/join) - I have them mostly implemented, but need to debug.
> Ralph
> 
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