[openib-general] Re: openib-general Digest, Vol 22, Issue 114

[Roland Dreier]

    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.