<br><tt><font size=2><br>
> ----- Message from "Erez Strauss" <erezs@voltaire.com>
on Tue, 6 Mar<br>
> 2007 00:07:41 +0200 -----</font></tt>
<br><tt><font size=2>> <br>
> To:</font></tt>
<br><tt><font size=2>> <br>
> <openib-general@lists.openfabrics.org></font></tt>
<br><tt><font size=2>> <br>
> Subject:</font></tt>
<br><tt><font size=2>> <br>
> [ofa-general] IPoIB-CM/RC - NAPI patch.</font></tt>
<br><tt><font size=2>> <br>
> Hello Roland,</font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> I understand that you have a patch to enable
NAPI for IPoIB-CM/RC.</font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> I’m interested in the patch to reduce the number
of interrupts I get<br>
> on a system (40k /s).</font></tt>
<br>
<br><tt><font size=2>Are you still getting 40k interrupts per second with
IPoIB-CM? You shouldn't because if you are using a 32768 MTU size you should
cut the interrupts down by a factor of 16. With IPoIB-CM, each interrupt
should be a 32K message instead of a 2K message.</font></tt>
<br>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> Does it apply to the nightly build?</font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> Are there tunable variables to control the increase
of latency due <br>
> to reduction of interrupts?</font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> Would you please send me a copy?</font></tt>
<br><tt><font size=2>> </font></tt>
<br><tt><font size=2>> Thanks,</font></tt>
<br><tt><font size=2>> Erez</font></tt>
<br><tt><font size=2>> Voltaire Inc.<br>
</font></tt>
<br>
<br><font size=2 face="sans-serif"><br>
Bernie King-Smith <br>
IBM Corporation<br>
Server Group<br>
Cluster System Performance <br>
wombat2@us.ibm.com (845)433-8483<br>
Tie. 293-8483 or wombat2 on NOTES <br>
<br>
"We are not responsible for the world we are born into, only for the
world we leave when we die.<br>
So we have to accept what has gone before us and work to change the only
thing we can,<br>
-- The Future." William Shatner</font>