157k interrupts per second causing 60% CPU load on idle system

[Mike Tancsa]

On 3/20/2012 1:26 AM, Matt Thyer wrote:
> I've upgraded my FreeBSD-STABLE NAS from r225723 (22nd Sept 2011) to
> r232477 (4th Mar 2012) and am finding that a system process called "intr"
> is now constantly using about 60% of 1 CPU starting a short time after
> reboot (possibly triggered by use of the samba server).
> 
> When this starts, systat -vm 1 says that the system is 85% idle and 14%
> interrupt handling.
> It says that there's around 157k interrupts per second.
> 
> Any idea what could be the cause ?

This sounds like the problem I had with my intel board.  BIOS update
fixed it.  What chipset and MB vendor do you have ?
/usr/ports/sysutils/dmidecode is handy for digging up BIOS and chipset info

http://lists.freebsd.org/pipermail/freebsd-questions/2012-March/239394.html

	---Mike




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Mike Tancsa, tel +1 519 651 3400
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