Hello, Jack.
You wrote 15 ?????? 2007 ?., 23:03:46:

> sysctl hw.intr_storm_threshold

If I set this onw to 10000, em0 generate 1001-1002 irq per second
(accroding to vmstat -i) without any storm messages

> In this old of an adapter though seems more likely something is
> wrong.

Yep... 1002 ips without traffic... It is too much, IMHO

> Let me see if our test group can dig up this adapter and try it.

It was sold as:

Intel PWLA 8390-MT Pro/ 1000MT (chip 82540EM) OEM

// Black Lion AKA Lev Serebryakov

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