netdev - Re: [PATCH net-next] net: dummy: make use of multi-queues

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Message-ID: <1395888748.12610.279.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Wed, 26 Mar 2014 19:52:28 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Daniel Borkmann <dborkman@...hat.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org,
	Jesper Dangaard Brouer <brouer@...hat.com>
Subject: Re: [PATCH net-next] net: dummy: make use of multi-queues

On Thu, 2014-03-27 at 01:37 +0100, Daniel Borkmann wrote:
> Quite often it can be useful to just use the dummy device as a blackhole
> sink for skbs, e.g. for packet sockets or pktgen tests. Therefore, make
> use of multiqueues, so that we can simulate for that. trafgen mmap/TX_RING
> example against dummy device with config foo: { fill(0xff, 64) } results
> in the following performance improvements on an ordinary Core i7/2.80GHz
> as we don't need to take a single queue/lock anymore:

btw, this driver has percpu stats, so memory needs will explode with
your patch...



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