Re: Weird NET_RX softirq behavior

Dmitry Popov
2014-08-07T14:18:19Z

On Thu, 7 Aug 2014 17:10:50 +0800
Jisheng Zhang <jszhang@marvell.com> wrote:

> 2. only one netdev in the system: eth0.

There should also be lo (loopback) at least.

> 4. But NET_RX seems abnormal
> ~ # cat /proc/softirqs
> CPU0 CPU1 CPU2 CPU3
> NET_RX: 445587 322 983 0
>
> I'm expecting NET_RX under CPU1, 2, 3 should be zero. Any suggestions
> about this abnormal behavior?

Do you have any loopback traffic? It could be handled by CPU1/2 explaining
non-zero NET_RX counters.