How to distribute IRQs to all cores

[Akash]

Try programming the CPU-irq affinity by writing to

/proc/irq/<irq-number>/smp_affinity

For example masks for irqs could be :
irq 97 - 0x1
99     - 0x2
103   - 0x4
104   - 0x8

That way, you are hardcoding on which cpu the particular irqs should land.

HTH
Akash

On Thu, Aug 25, 2011 at 4:08 AM, J.Hwan Kim <frog1120 at gmail.com> wrote:

> Hi, everyone
>
> The interrupts of my ixgbevf driver occurs only Core 0
> although the user space "irqbalance" serivce is working.
>
> How can I distribute the interrupt of RX in ixgbevf to all cores?
> Is there any kernel compile option for it ?
>
>
> cat /proc/interrupts | grep "isv"
>   97:          8          0          0          0          0
> 0          0          0   PCI-MSI-edge      isv0-rx-0
>   99:          7          0          0          0          0
> 0          0          0   PCI-MSI-edge      isv0:lsc
>  103:       2059      0          0          0          0
> 0          0          0   PCI-MSI-edge      isv2-rx-0
>  104:         14        0          0          0          0
> 0          0          0   PCI-MSI-edge      isv2-tx-0
>  105:          1         0          0          0          0
> 0          0          0   PCI-MSI-edge      isv2:mbx
>
> "isv" is netdevice name of my ixgbevf.
>
>
>
> Thanks in advance.
>
> Best Regards,
>
> J.Hwan Kim
>
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