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Date:	Fri, 08 May 2015 08:56:09 -0700
From:	Eric Dumazet <>
To:	Jesper Dangaard Brouer <>
Cc:	Daniel Borkmann <>,
	Alexei Starovoitov <>,
Subject: Re: Multiqueue pktgen and ingress path (Was: [PATCH v5 2/2] pktgen:
 introduce xmit_mode '<start_xmit|netif_receive>')

On Fri, 2015-05-08 at 17:49 +0200, Jesper Dangaard Brouer wrote:

> I'm quite puzzled why a single atomic op could "freeze" my system from
> scaling beyond 24Mpps.

Law of physics, since this cache line has to constantly fly among your

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