Why is em nic generating interrupts?
Michael O. Boev
mike at tric.tomsk.gov.ru
Mon Oct 6 05:49:06 PDT 2003
I've got a [uniprocessor] router machine with fxp and em nics.
I've built my kernel with the following included:
and enabled polling in /etc/sysctl.conf.
Having looked through a vmstat -i output I see
that the em card is generating interrupts, although
they should be disabled (as I see in em's source code).
interrupt total rate
stray irq0 1 0
stray irq6 1 0
npx0 irq13 1 0
ata0 irq14 2339 0
em0 irq10 421457 155
fxp0 irq5 2 0
atkbd0 irq1 3326 1
clk irq0 6778872 2500
rtc irq8 346899 127
Total 7552898 2786
What's happening? Is polling working in my case?
If yes, why is vmstat showing interrupts? I see clearly,
that fxp's counter doesn't increase, and em's is constantly growing.
Thanks in advance to anyone for an idea!
Please also CC: me as I'm not subscribed.
[mike at tric.tomsk.gov.ru].
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