high interrupt load under 6.0?

Kris Kennaway kris at obsecurity.org
Sat Feb 18 12:05:53 PST 2006

On Sat, Feb 18, 2006 at 07:52:02PM +0000, David E. Cross wrote:
> I have a 486DX50 firewall that has been serving me well for a number of
> years.  I recently upgraded it fro 5.4 to 6.0 and performance plumeted
> rather drastically (about 40%).  I would like to fix it.  What I have
> noticed is that even when sitting idle the system spends ~20% of its
> time in interrupt.  Below I have included dmesg, kernel config, and
> vmstat -i information.

Try turning HZ=1000 back down to HZ=100.

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