Eugene Perevyazko wrote:
On Sat, Jan 23, 2010 at 03:32:11AM +0600, Евгений wrote:
Hi,
I have several routers under heavy load, running FreeBSD 7.2
These routers use Netgraph to impelement traffic shaping and accouting
(using ng_car and ng_netflow nodes).
[skipped]
The second question is about the effectiveness of Netgraph queueing and ng_ipfw
node with SMP kernel...
[skipped]
one of the ng_queue* processes will take 100% time of one CPU core, when the others will not
process anything.
I have seen such behavior on my routers - at peak load, one of ng_queue* processes takes 100% of one core,
and the other processes are seen in top taking 0% of CPU.
My question is, can it somehow be fixed?
I see the same behaviour with ng_nat and ng_ipfw.
7-S as of Nov 2009 on Xeon E5410 (4 cores).
16 ng_nat nodes connected to ng_ipfw.
Sometimes one ng_queue eats 100% of one core while other 3 ng_queues sit idle.
I'm going to set queueing on all ng_nat's hooks to see if it will help.
an interesting idea.
I'm not familiar with the ng_queue & ng_ipfw nodes but scheduling
work between threads in netgraph has always been a tricky area
and is probably in need to work at the moment.
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