[openib-general] Re: openib-general Digest, Vol 22, Issue 114

[Shirley Ma]

Roland Dreier <rdreier at cisco.com> wrote on 04/18/2006 02:49:34 PM:

>     Shirley> The patch allows you tuning send/recv NUM_WC per poll and
>     Shirley> add some cycles before polling to sync with the hardware.
> 
> I have no problem increasing NUM_WC to something much bigger.  What do
> you mean by "add some cycles before polling"?
> 
>  - R.

After completion handler receives the notification, don't poll the CQ 
right away,
and wait for more WIKIs in CQ. That way can reduce the CQ lock overhead.

I found that there is some problem to increase the NUM_WC on recv. It 
hurts the
performance lots. Do you have any clue?

Thanks
Shirley Ma
IBM Linux Technology Center
15300 SW Koll Parkway
Beaverton, OR 97006-6063
Phone(Fax): (503) 578-7638
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openfabrics.org/pipermail/general/attachments/20060418/543d49e8/attachment.html>