em interrupt storm
Frank Mayhar
frank at exit.com
Thu Nov 24 07:42:59 GMT 2005
On Thu, 2005-11-24 at 02:14 -0500, Barney Wolff wrote:
> I've observed the interrupt aliasing problem on an Asus A7M266-D
> with 2 Athlon 2200-MPs, so it's not confined to the Intel chipset.
> Here's the evidence (there is nothing connected to ehci0):
This prompted me to take a look at my setup. Sure enough, same thing:
realtime ~>vmstat -i
interrupt total rate
irq1: atkbd0 6218 0
irq3: sio1 2 0
irq4: sio0 245363 1
irq6: fdc0 3 0
irq12: psm0 379932 2
irq13: npx0 1 0
irq16: ohci2 1651974 9
irq17: pcm0 ehci0 35766600 198
irq18: nvidia0++ 15223737 84
irq19: xl0 ohci0+ 2407671 13
irq20: ahc0 1610309 8
irq21: em0 35275352 196
cpu0: timer 359360608 1998
cpu1: timer 359337445 1998
Total 811265215 4512
I haven't been using pcm0 and there's nothing on ohci2. This is a dual
Athlon MP 1900+, AMD chipset (Tyan Tiger MPX board)...
realtime ~>uname -a
FreeBSD realtime.exit.com 6.0-STABLE FreeBSD 6.0-STABLE #0: Wed Nov 16
19:57:03 PST 2005 frank at jill.exit.com:/usr/obj/usr/src/sys/REALTIME
i386
--
Frank Mayhar frank at exit.com http://www.exit.com/
Exit Consulting http://www.gpsclock.com/
http://www.exit.com/blog/frank/
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