That is what I've been trying to push. Both MVAPICH2 and OMPI have been
open to adjusting their transports to adhere to this requirement.
I wouldn't mind implementing something to enforce this in the IWCM or
the iWARP drivers IF there was a clean way to do it. So far there
hasn't been a clean way proposed.
Why can't either uDAPL or iW CM always do a send from the active to
passive side that gets stripped off? From the active side, the first
send is always posted before any user sends, and if necessary, a user
send can be queued by software to avoid a QP/CQ overrun. The completion
can simply be eaten by software. On the passive side, you have a
similar process for receiving the data.
(Yes this adds wire protocol, which requires both sides to support it.)
- Sean
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