[openib-general] RMPP implementation

[Sean Hefty]

Fab Tillier wrote:
>>1.  Issue one send at a time.  Additional sends are not transfered until
>>  the first send completes.
> 
> Isn't #1 the simplest to implement?  Turnaround on the send queue should be
> pretty quick, so send performance should be fine.  I say do whatever is
> simplest, and then optimize from there, and to me that means #1 at the
> moment.  What are the reasons to *not* do #1?

It's simpler to implement, and would definitely be the easiest to do on 
redirected QPs.  The only disadvantage is that it lowers the throughput 
between two clients.  Also, this is a relatively small decrease in 
complexity with respect to the rest of RMPP.

A couple of other areas that will need to be addressed include: RMPP 
timeouts, receive window sizes, and user-mode support.

- Sean