[eepro100] 80000 IRQs / sec on eth1 on SMP machine.

[Mike Zeller]

Hi folks,

	I am using an ION 2150 with two Pentium III CPUs and three Intel eepro100
cards.

Twice now I have seen the following odd behavior when I ifconfig eth1 up:
The card will start reporting interrupts arriving at about 80000 / sec.  I
determine the rate by doing "cat /proc/interrupts" at ten second intervals
and dividing by 10. (Hi tech huh?).  I am running an out of the box RedHat
6.2 and the driver identifies itself as:

eepro100c:v.109 j-t 9/29/99 ...
eepro100c: $Revision: 1.18 1999/12/29 ...

One other oddity is the IRQs which are detected at eth0: IRQ 18, eth1: IRQ
20 and eth2: IRQ 26.  Is this normal for SMP?

When I "ifconfig eth1 down" and then "ifconfig eth1 up" the interrupts come
in at a rate I would expect for the traffic on the card.

Any clues what might be going on here?

Knowledge is power, thanks in advance for the help!!


Mike



Mike Zeller, Ph.D.
_________________________________________________________
Senior Software Engineer/Architect
T: 610-530-2000 x3125
Dyband - A Business of Orchestream
3435 Winchester Rd. Suite 400
Allentown, Pennsylvania 18104-2262
T: 610-530-2000 F: 610-530-2020
www.dyband.com