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

Shirley Ma xma at us.ibm.com
Wed Oct 18 10:10:01 PDT 2006






Roland Dreier <rdreier at cisco.com> wrote on 10/17/2006 08:41:59 PM:
> Anyway, I'm eagerly awaiting your NAPI results with ehca.
>
> Thanks,
>   Roland

Thanks. The touch test results are not good. This NAPI patch induces huge
latency for ehca driver scaling code, the throughput performance is not
good. (I am not fully conviced the huge latency is because of raising NAPI
in thread context.) Then I tried ehca no scaling driver, the latency looks
good, but the throughtput is still a problem. We are working on these
issues. Hopefully we can get the answer soon.

Thanks
Shirley Ma
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