From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jisheng Zhang <jszhang@marvell.com>
Subject: Re: Weird NET_RX softirq behavior
Date: Fri, 8 Aug 2014 14:55:33 +0800
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Cc: Dmitry Popov <ixaphire@qrator.net>,
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To: Eric Dumazet <eric.dumazet@gmail.com>
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On Thu, 7 Aug 2014 22:47:58 -0700
Eric Dumazet <eric.dumazet@gmail.com> 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.