From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rick Jones <rick.jones2@hp.com>
Subject: Re: [PATCH v2] ipv4: Early TCP socket demux.
Date: Wed, 20 Jun 2012 09:21:59 -0700
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References: <20120619.214657.1345825814176201681.davem@davemloft.net> <1340171359.4604.794.camel@edumazet-glaptop> <1340171489.4604.796.camel@edumazet-glaptop> <20120619.231401.2278176068934152926.davem@davemloft.net>
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Cc: eric.dumazet@gmail.com, shemminger@vyatta.com,
	netdev@vger.kernel.org
To: David Miller <davem@davemloft.net>
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On 06/19/2012 11:14 PM, David Miller wrote:
> From: Eric Dumazet<eric.dumazet@gmail.com>
> Date: Wed, 20 Jun 2012 07:51:29 +0200
>
>> On Wed, 2012-06-20 at 07:49 +0200, Eric Dumazet wrote:
>>
>>> 2) small lived tcp sessions
>>>
>>>     input dst is now dirtied because of the additional
>>> dst_clone()/dst_release()
>>
>> Not realy a concern because we dirty cache line anyway
>>
>> dst_use_noref()
>> {
>> 	dst->__use++;
>> 	dst->lastuse = time;
>> }
>
> Right, the costs probably even out for short TCP flows.
>
> But better to do real tests than to believe what any of
> us say. :-)

netperf -c -C  -t TCP_CC ...  #just connect/close

or

netperf -c -C -t TCP_CRR ...  # with a request/response pair in there

For some definition of "real" anyway :)

rick jones