Subject: Re: Weird NET_RX softirq behavior

From: Jisheng Zhang <[email-masked]>
Date: Fri, 8 Aug 2014 14:55:33 +0800

On Thu, 7 Aug 2014 22:47:58 -0700
Eric Dumazet <[email-masked]> wrote:

> On Fri, 2014-08-08 at 10:37 +0800, Jisheng Zhang wrote:
> > nd and recive 7 packets so far, about 1400bytes. Seems small
> > comparing with the CPU1 and CPU2 NET_RX softirq numbers, right?
> > 
> > Any other possible case?
> 
> Multicast loop. Check dev_loopback_xmit() and its callers.
> 
> 

That's it! This make sense

I didn't see any NET_RX on CPU1,2,3 if I disabled mulitcast

Thanks very much.