Re: [Xen-devel] vif processing is unbalance

[xu cong <congxumail@xxxxxxxxx>]

irqbalance does not work for vif IRQ. Manually bind IRQ works, but it is not a elegant method. Would you mind telling me which code trigger this IRQ to vif-tx/rx? Maybe I can try tuning it. Thanks.

2014-04-21 14:29 GMT-04:00 Wei Liu <wei.liu2@xxxxxxxxxx>:

On Mon, Apr 21, 2014 at 02:24:48PM -0400, xu cong wrote:
> Hi All,
>
> I found the vif processing are always done on the first vcpu in dom0. I
> give dom0 2 vcpus pinned to two dedicated cores respectively. The affinity
> of each domU's vif-rx/tx is 3 (/proc/irq/**/smp_affinity is 3). However,
> all vif processing are still only done on the vcpu0. This can be observed
> by reading top output (%si utilization) and /proc/interrupts. My test bed
> is Xen4.2.2, linux 3.12 is used as both dom0 kernel and domU kernel.
>
> Is there a method to balance the vif processing among all vcpus in dom0?
> Thanks
>

You probably need to either manually bind IRQ to a specific CPU or use
irqbalance.

> Regards,
> Cong

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel