[ofa-general] Re: [PATCH 3 of 3] ipoib/cm: separate comp vectors to RX/TX

[Shirley Ma]

general-bounces at lists.openfabrics.org wrote on 05/03/2007 11:39:43 AM:

>  > Enhance ipoib to use multiple completion vectors if available.
>  > On mthca, this increases netperf BW by some 5% with
>  > same or lower service demand.
>
> I wonder if this is the best way to use multiple vectors in IPoIB.
> Shirley has pointed out that right now we can't scale to both ports on
> 2-port adapters because both ports end up using the same interrupt.
> So maybe we want to target each port to separate completion vectors
> when available?
>
>  - R.

Yes, it would be better to do perPort/perCompletion/perEvent/perInterrupt.
It also helps latency not just throughput.

Shirley Ma
IBM Linux Technology Center
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