Shirley> After completion handler receives the notification, don't
Shirley> poll the CQ right away, and wait for more WIKIs in
Shirley> CQ. That way can reduce the CQ lock overhead.
Roland> That's interesting... it makes sense, and it argues in
Roland> favor of deferring CQ polling to a kernel thread. Of
Roland> course this will hurt ping-pong latency. Maybe it's
Roland> better to just implement NAPI though...
And actually it argues against splitting the CQ, because having one CQ
increases the number of CQ entries that we have a chance to poll at
any one time, by lumping send and receive completions together...
- R.
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