Re: [fbsd] Network performance in a dual CPU system

Hi Marcos,

On Fri, Feb 10, 2006 at 08:46:00AM -0500, Marcos Bedinelli wrote:
Hello all,

We have a 2.4GHz Intel Xeon machine running FreeBSD 6.0-RELEASE-p2. Due
to heavy network traffic, CPU utilization on that machine is 100%:

===

mull [~]$top -S
last pid: 94989; load averages: 3.69, 4.02, 4.36 up
25+07:21:34 14:51:43
105 processes: 2 running, 46 sleeping, 57 waiting
CPU states: 0.0% user, 0.0% nice, 0.3% system, 99.4% interrupt,
0.3% idle
Mem: 20M Active, 153M Inact, 84M Wired, 4K Cache, 60M Buf, 237M Free
Swap: 999M Total, 999M Free

PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND
60 root 1 -44 -163 0K 8K WAIT 355.6H 72.17% swi1:
net
39 root 1 -68 -187 0K 8K WAIT 52.3H 5.22% irq28:
bge0
40 root 1 -68 -187 0K 8K WAIT 28.3H 2.25% irq29:
bge1
11 root 1 171 52 0K 8K RUN 166.6H 0.00% idle
63 root 1 -16 0 0K 8K - 121:55 0.00% yarrow
61 root 1 -32 -151 0K 8K WAIT 46:21 0.00% swi4:
clock sio
[...]

===


Does anyone know whether a dual CPU system can help us improve the
situation? I was wondering if the software interrupt threads would be
divided between the two processors.

I am a few weeks late, I just saw this very interesting thread. What
solution did you finally employ to circumvent your high interrupt
load ?

Regards,
--
Jeremie Le Hen
< jeremie at le-hen dot org >< ttz at chchile dot org >
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