Why is em nic generating interrupts?
Sergey 'DoubleF' Zaharchenko
doublef at tele-kom.ru
Mon Oct 6 06:01:53 PDT 2003
On Mon, 6 Oct 2003 19:48:53 +0700 "Michael O. Boev" <mike at tric.tomsk.gov.ru> probably wrote:
> Hello, everyone!
Hi!
> I've got a [uniprocessor] router machine with fxp and em nics.
> I've built my kernel with the following included:
>
> options DEVICE_POLLING
> options HZ=2500
>
> 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.
Assuming you are using 4.8,
\From the polling manpage:
> As of this writing, the dc, fxp, rl and sis devices are supported, with
>other in the works.
I guess em is just not there yet, while fxp is...
HTH
--
DoubleF
"All flesh is grass"
-- Isiah
Smoke a friend today.
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