Pablo Neira Ayuso wrote:
Fabian Hugelshofer wrote:
Pablo Neira Ayuso wrote:
[PATCH] dynamic calculation of event message size for ctnetlink
This patch adds dynamic message size calculation for ctnetlink. This
reduces CPU consumption since the overhead in the message trimming
is removed.
Thanks for the patch.
Just did some performance tests. On average it saves 5% CPU usage at
~1600pps (UDP packets, 1000B payload, random source ports) on my router
(IXP4XX, 266Mhz).
With the unclean patch the performance gain was slightly higher. I have
posted it was 10%, but as far as I remember it was actually a bit less
then that. The remaining difference can be explained by the length
calculation overhead and measuring inaccuracy.
How are you measuring CPU consumption? I would not trust "top" or
something similar too much. I usually use cyclesoak, however I guess
that you'll need a bit of hacking to get it working there.
I'll try to do some measurements in my platform soon anyway.
I am using top indeed. I run it in batch mode with a period of 10s and
dump to a file. At the end I calculate the average idle usage over 5
periods (ignoring the first one).
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
