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Date: Tue, 29 Mar 2005 21:22:10 +0300
From: Dan Cojocar <dan.cojocar@gmail.com>
To: freebsd-current@freebsd.org
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Subject: Interrupt storm
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Hello all,

I noticed the following interrupt storm in my dmesg:

Interrupt storm detected on "irq11: rl1"; throttling interrupt source
Interrupt storm detected on "irq5: rl0"; throttling interrupt source

Here is my vmstat -i:
interrupt                          total       rate
irq0: clk                         128600        199
irq1: atkbd0                        2499          3
irq4: sio0                             2          0
irq5: rl0                         128901        200
irq8: rtc                          82294        127
irq11: rl1                        128902        200
irq12: psm0                        16152         25
irq14: ata0                        12600         19
irq15: ata1                           71          0
Total                             500021        776

and here is my dmesg:
http://cs.ubbcluj.ro/~dan/dmesg.txt

I have options DEVICE_POLLING and options HZ=200, i have tested with
greater HZ values like 1000, and without DEVICE_POLLING  but i have
the same storm.
If you need more info please ask.
Thanks,
Dan