[openib-general] [PATCH/RFC 1/2] IB: Return "maybe_missed_event" hint from ib_req_notify_cq()

[Shirley Ma]

Roland Dreier <rdreier at cisco.com> wrote on 10/19/2006 09:10:35 PM:
> It's entirely possible that my implementation of the missing event
> hint in ehca is wrong.  I just guessed based on how poll CQ is
> implemented -- if the consumer requests a hint about missing events,
> then I lock the CQ and check if its empty after requesting
> notification.
>
> I looked over my code again, and I don't see anything obviously wrong,
> but it's quite possible I made a mistake that I just can't see right
> now (like reversing a truth value somewhere).  Someone who knows how
> ehca works might be able to spot the error.
>
>  - R.

The oprofile data (with your napi + this hack patch) looks good, it reduced
cpu utilization significantly. (I was wrong about cpu utilization.)  I will
talk with ehca team regarding this missing event hint patch on ehca.

thanks
Shirley Ma
IBM Linux Technology Center
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