On Sat, 2006-11-25 at 03:55 +0200, Itay Duvdevani wrote:
> It seems like the timer generates most of the interrupts, which makes
> sense. But can it possibly be the reason for the 30% usage?
> 
> Anyways, since I'm a bit unfamiliar with the /proc/interrupts format:
> 
>            CPU0
>   0:    6772583    IO-APIC-edge  timer
>   1:       4929    IO-APIC-edge  i8042
>   7:          3    IO-APIC-edge  parport0
>   8:          1    IO-APIC-edge  rtc
>   9:          0   IO-APIC-level  acpi
>   14:      52691    IO-APIC-edge  ide0
>   15:     242905    IO-APIC-edge  ide1
> 169:    1006942   IO-APIC-level  eth0
> 185:      53538   IO-APIC-level  uhci_hcd:usb1, uhci_hcd:usb2,
> uhci_hcd:usb3, ehci_hcd:usb4
> 193:        724   IO-APIC-level  EMU10K1
> 201:    2089405   IO-APIC-level  nvidia
> NMI:          0
> LOC:    6772539
> ERR:          0
> MIS:          0
> 
> Thanks,
> - Itay.

It's seems that the IRQ hitters are the eth0 and nVidia.
Your eth0 card seems to be hitting a lot of traffic. (most of the packet
handling is done in SI)
Please post the output of $ ifconfig eth0 | egrep -e 'TX|RX'
What chipset does your ethernet card use? Which driver are you using?
Oh... do you have iptables enabled? Routing?

As for the nvidia driver - well, the interrupt count seems a bit high -
though AFAIK, nVidia doesn't do too much work in SI. Which driver are
you using?

- Gilboa


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