Extremely high interrupt count / load on recent CURRENT
Rink Springer
rink at freebsd.org
Fri Jul 27 19:15:37 UTC 2007
On Fri, Jul 27, 2007 at 01:02:16PM -0600, Scott Long wrote:
> Can you try removing drivers one at time until it goes away? Also,
I'll give this a try later. It's faily easy to reproduce - just use the
machine for longer than 1 hour and it'll waste 50% time on interrupts...
> what kind of machine is this?
This is a 2x Opteron 846 on a Tyan K8SE motherboard, running i386. 2GB
RAM. Anything else you need to know? FWIW, the dmesg is available at
http://rink.nu/tmp/dmesg-pitchfork.txt
Regards,
--
Rink P.W. Springer - http://rink.nu
"root is always right" -- the kernel
>
> Scott
>
>
> Rink Springer wrote:
> > Hi everyone,
> >
> > Since my last csup, I'm encountering very high interrupt counts (and
> > thus, a high associated interrupt load) on my workstation.
> >
> > vmstat -i reports:
> >
> > interrupt total rate
> > irq1: atkbd0 26087 1
> > irq14: ata0 58 0
> > irq16: emu10kx0 1051388503 78968
> > irq17: nvidia0+ 1189799 89
> > irq20: ohci0 16596 1
> > irq21: ehci0 1 0
> > irq22: atapci1 1387849 104
> > irq23: atapci2 905538 68
> > irq24: arcmsr0 176404 13
> > irq27: isp0 85 0
> > irq28: bge0 37642180 2827
> > cpu0: timer 26627670 1999
> > cpu1: timer 26595670 1997
> > Total 1145956440 86071
> >
> > The problem is, when I remove the snd_emu10kx driver (I load it as a
> > module in loader(8)), then irq28: bge0 starts to exhibit the same
> > pattern, generating thousands of interrupts.
> >
> > My kernel is GENERIC + ULE - WITNESS, but the problem also
> > occured using plain GENERIC. dmesg is available at
> > http://rink.nu/tmp/dmesg-pitchfork.txt
> >
> > Can anyone help me track this down?
> >
> > Regards,
> >
>
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