High interrupt load

[sdm900]

Morning

Running pfsense on a relatively new dell box with 2 x D-Link DGE-530T Gigabit Ethernet.

Last pid: 15582;  load averages:  0.84,  0.88,  0.82                                            up 0+00:31:07  11:22:14
72 processes:  3 running, 69 sleeping
CPU states:  0.0% user,  0.9% nice,  1.5% system, 43.0% interrupt, 54.5% idle
Mem: 50M Active, 11M Inact, 46M Wired, 25M Buf, 1881M Free
Swap: 4096M Total, 4096M Free

Anyway, top is reporting very high interrupt load on a network which has almost nothing happening on it.  Ideas?

uname -a
FreeBSD XXXX 6.2-RELEASE-p11 FreeBSD 6.2-RELEASE-p11 #0: Sun Feb 24 16:49:14 EST 2008    sullrich@builder6.pfsense.com:/usr/obj.pfSense/usr/src/sys/pfSense_SMP.6  i386

[sdm900]

Extra, I tried turning on polling to no avail.

[sdm900]

I also notice

USER    PID %CPU %MEM  VSZ  RSS  TT  STAT STARTED      TIME COMMAND
root      10 98.7  0.0    0    8  ??  RL  10:51AM  25:49.49 [idle: cpu1]
root      28 84.9  0.0    0    8  ??  RL  10:51AM  21:59.13 [irq19: uhci2 uhci*]
root      11 12.9  0.0    0    8  ??  RL  10:51AM  4:31.13 [idle: cpu0]

[hoba]

Try to disable acpi: http://devwiki.pfsense.org/BootOptions

Also try to disable all hardware in the bios that you don't need to free up ressources, maybe there is some interruptsharing going on.

[sdm900]

ok, I entered the /boot/loader.conf to disable acpi and now my firewall 4000km away is not booting :(