[ofa-general] Re: IPOIB NAPI

[Shirley Ma]

Michael,

>I have not benchmarked this, but actually the "return 1" version makes
sense to
>me too: since a new completion was observed after notify-cq, we likely
currently
>have HCA writing new completions into the CQ at a high rate, so it makes
sense
>to delay polling by a few cycles, and reduce the number of interrupts in
this
>way.

>Right?

Agree. Another question, have you benchmark IPoIB NAPI vs. missed event
only mode: just change ipoib completion from notify-cq, poll-cq to poll-cq,
notify-cq if any missed event, poll again? I am going to try this to see
the performance difference.

Thanks
Shirley Ma
IBM Linux Technology Center
15300 SW Koll Parkway
Beaverton, OR 97006-6063
Phone(Fax): (503) 578-7638
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