ML403 gigabit ethernet bandwidth - 2.6 kernel

[Ming Liu]

Actually I have asked the xilinx expert on the statistics. With the 
PLB_TEMAC, we can also get a result like that, say 300Mbps for TCP. (From 
their numbers, the throughput is even higher.)

Some remindings from my experience: Remember to enable everything in the 
hardware and software which can improve the performance, such as, 
CS_offloading, data allighment engines, large fifos, and so on, from the 
configuration of PLB_TEMAC in EDK. As well, remember to enable cache. In 
the software field, interrupt_coaleascing will also help. At this time, 
normally we can get more than 100Mbps for TCP. Jumbo-frame of 8982 will 
almost double this number. 

Have fun.

BR
Ming


>From: "Greg Crocker" <greg.crocker at gmail.com>
>To: linuxppc-embedded at ozlabs.org
>Subject: RE: ML403 gigabit ethernet bandwidth - 2.6 kernel
>Date: Mon, 25 Jun 2007 15:42:09 -0400
>
>I was able to achieve ~320 Mbit/sec data rate using the Gigabit 
>System
>Reference Design (GSRD XAPP535/536) from Xilinx.  This utilizes the
>LocalLink TEMAC to perform the transfers.  The reference design 
>provides the
>Linux 2.4 drivers that can be ported to Linux 2.6 with a little 
>effort.
>
>This implementation did not use checksum offloading and the data 
>rates were
>achieved using TCP_STREAM on netperf.
>
>Greg


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