irq balancing question

[JaniD++]

Hello, list,

I try to tune my system with manually irq assigning, but this simple not
works, and i don't know why. :(
I have already read all the documentation in the kernel tree, and search in
google, but i can not find any valuable reason.

[root@dy-xeon-1 proc]# cat irq/217/smp_affinity
f
[root@dy-xeon-1 proc]# echo 1 > irq/217/smp_affinity
[root@dy-xeon-1 proc]# cat irq/217/smp_affinity
f
[root@dy-xeon-1 proc]# /bin/echo 1 > irq/217/smp_affinity
[root@dy-xeon-1 proc]# cat irq/217/smp_affinity
f
[root@dy-xeon-1 proc]# cat interrupts
           CPU0       CPU1       CPU2       CPU3
  0:        117          0          0   50302311    IO-APIC-edge  timer
  1:          0          0          0        560    IO-APIC-edge  i8042
  8:          0          0          0       8369    IO-APIC-edge  rtc
  9:          0          0          0          0   IO-APIC-level  acpi
 14:          0          0          0    9707311    IO-APIC-edge  ide0
169:          0          0          0          1   IO-APIC-level
uhci_hcd:usb2
177:          0          0          0          0   IO-APIC-level
uhci_hcd:usb3
185:          0          0          0          0   IO-APIC-level
uhci_hcd:usb4
193:          0          0          0    4335777   IO-APIC-level
ehci_hcd:usb1
209:          0          0          0 1777636996   IO-APIC-level  eth0
217:          0          0          0 2669520977   IO-APIC-level  eth1
NMI:          0          0          0          0
LOC:   50307523   50307625   50307006   50302885
ERR:          0
MIS:          0
[root@dy-xeon-1 proc]#

Can somebody help me?

Cheers,
Janos

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