[ofiwg] No atomics support with verbs RDM endpoints?

Hefty, Sean sean.hefty at intel.com
Tue Nov 14 10:33:40 PST 2017

> Since RMA is supported for RDM and the underlying transport appears to
> be RC QPs, it isn’t obvious to me why this isn’t supported. Is there
> something I’m not understanding?

It's just that the work hasn't been done.  RDM EPs was developed by the Intel MPI group, which uses their own atomics implementation.  Verb based atomics are an extremely small set of atomics compared to what MPI needs, and not supported by all verbs based devices.

- Sean

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