[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 04/20/2006 09:05:41 AM:

>     Shirley> It helps the performance about 10% for the touch
>     Shirley> netperf/netserver test, then hit driver errors. I notice
>     Shirley> that the send is faster than before. Let me send you the
>     Shirley> patch tomorrow, maybe you have the hints to identify the
>     Shirley> problem.
> 
> Without seeing the patch I'm going to guess that your speedup is
> coming by breaking the accounting of free space in the send queue, and
> so you run into problems when the queue fills up.
> 
>  - R.

In this case, post_send() should return ENOMEM. I didn't see any error 
returns.

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


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