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Message-ID: <1407476878.3604.0.camel@edumazet-glaptop2.roam.corp.google.com>
Subject: Re: Weird NET_RX softirq behavior
From: Eric Dumazet <eric.dumazet@gmail.com>
To: Jisheng Zhang <jszhang@marvell.com>
Cc: Dmitry Popov <ixaphire@qrator.net>,
        "davem@davemloft.net" <davem@davemloft.net>,
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Date: Fri, 08 Aug 2014 07:47:58 +0200
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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.