netdev - Re: [PATCH] netfilter: finer grained nf

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Date:	Tue, 31 Mar 2009 21:52:13 +0200 (CEST)
From:	Jesper Dangaard Brouer <hawk@...u.dk>
To:	Eric Dumazet <dada1@...mosbay.com>
Cc:	netdev <netdev@...r.kernel.org>, Rick Jones <rick.jones2@...com>
Subject: Re: [PATCH] netfilter: finer grained nf_conn locking


On Mon, 30 Mar 2009, Eric Dumazet wrote:
> Jesper Dangaard Brouer a écrit :
>> On Mon, 30 Mar 2009, Eric Dumazet wrote:
>>
>>> Jesper Dangaard Brouer a écrit :
>>>>
>>>>> Eric Dumazet wrote:
>>>>>>  "tbench 8" results on my 8 core machine (32bit kernel, with
>>>>>>  conntracking on) : 2319 MB/s instead of 2284 MB/s
>>>>
>>>> How do you achieve this impressing numbers?
>>>> Is it against localhost? (10Gbit/s is max 1250 MB/s)
>>>
>>> tbench is a tcp test on localhost yes :)
>>
>> I see!
>>
>> Using a Sun 10GbE NIC I was only getting a throughput of 556.86 MB/sec
>> with 64 procs (between an AMD Phenom X4 and a Core i7).  (Not tuned
>> multi queues yet ...)
>>
>> Against localhost I'm getting (not with applied patch):
>>
>>  1336.42 MB/sec on my AMD phenom X4 9950 Quad-Core Processor
>>
>>  1552.81 MB/sec on my Core i7 920 (4 physical cores, plus 4 threads)
>
> Strange results, compared to my E5420 (I thought i7 was faster ??)
>
>>  2274.53 MB/sec on my dual CPU Xeon E5420 (8 cores)

I tried using "netperf" instead of "tbench".

A netperf towards localhost (netperf -T 0,1 -l 120 -H localhost)
reveals that the Core i7 is still the fastest.

24218 Mbit/s  on Core i7 920

11684 Mbit/s  on Phenom X4

  8181 Mbit/s  on Xeon E5420

A note to Rick, the process "netperf" would use 100% CPU time and
"netserver" would only use 70%.

Hilsen
   Jesper Brouer

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