[openib-general] MAD queuing model

[Sean Hefty]

On Wed, 01 Sep 2004 15:38:15 -0400
Hal Rosenstock <halr at voltaire.com> wrote:

> If an RMPP send is n WRs, is there a way for the access layer to know
> before posting whether all the WRs for this will fit ? If so, is this

'n' may be smaller than the size of the QP.

> "worth" the expense of this operation or should they just be posted
> until not fitting and the rest deferred (and RMPP will do the correct
> recovery either locally or remotely) ? (I obviously haven't thought this
> through in detail yet...)

As long as we can come close to maintaining the data rate, I'm not sure that defering the sends helps anything.  I think we want to try to keep the queue as full as possible when it's busy.