[openib-general] Re: [PATCH] IPoIB splitting CQ, increase both send/recv poll NUM_WC & interval

[Shirley Ma]

Roland Dreier <rdreier at cisco.com> wrote on 04/19/2006 02:34:24 PM:

>     Shirley> OK. I am going to split the patch without splitting CQ
>     Shirley> first.  WC handler is called in the interrupt context, it
>     Shirley> is a myth to have bidirectional performance improvement
>     Shirley> with splitting CQ.  More investigation is needed.
> 
> But you did see performance improvement on mthca, right?  The reason
> for that is what I would like to understand.
> 
>  - R.

Yes. We did see the performance improvement on mthca. The better
way to understand the performance improvement maybe profiling 
the kernel.

Also I am working on removal tx_ring, which requires CQ to be splited
to remove recv WC wiki flag IPOIB_OP_RECV.

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