linux-kernel - poor sctp performance with small packets

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Message-ID: <20110316134510.64770@gmx.net>
Date:	Wed, 16 Mar 2011 14:45:10 +0100
From:	sctp@...kelshirt.de
To:	linux-kernel@...r.kernel.org
Subject: poor sctp performance with small packets 

Hi,

I am just trying iperf 2.0.8 with the "-z" option - packet size is 1 Byte.
(With my own tool the results are the same)
./iperf -s -p 4444  -l 1 -z    (this is the reader)
./iperf -c 172.16.0.1 -l 1 -p 4444  -t 30 -z   (this is the writer)

>From a tcpdump point of view it looks that only each 200ms a packet is sent - so very poor throughput. 

OS is Redhat,
2.6.32-71.18.1.el6.x86_64 #1 SMP Wed Feb 2 17:49:59 EST 2011 x86_64 x86_64 x86_64 GNU/Linux

br




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