I just took the time to write something about performance/throughput on
the wiki:
- http://lwip.wikia.com/wiki/Maximizing_throughput
- http://lwip.wikia.com/wiki/Tuning_TCP
However, you didn't tell us if you are using TCP or UDP? Also, I don't
know what ETHERNET_CONF_NB_TX_BUFFERS is, so I'm guessing it's related
to the lwIP port you are using... Maybe someone else here has experience
with the platform you are using, but I don't :-(
Simon
Dany Thiffeault wrote:
Hi,
I'm currently coding an application on a AVR32 UC3 board. The board is
actually an acquisition platform that's using Ethernet (lwip 1.3.1
currently). I'm using FreeRTOS and the Atmel framework 1.4.
My connection is working great with my Windows application. There are
two modes to my AVR32 application:
1- Idle mode where there are only keep-alive packets every 1 second,
of 8bytes each.
2- Streaming mode, where the AVR32 (so LWIP) send data as fast as
possible to the Win application.
What is important to me is to get maximum speed in Streaming mode,
where packets are Header(24bytes) + Data(?Bytes). I'm currently
playing with the data size to see what I can achieve. Ideally, the
maximum size I would like is about 35KBytes. Right now, I'm not sure
what's going on, but the Ethernet seems to hang after a few seconds of
streaming. Haven't found the problem so far.
So, what are the important parameters for maximum thoughput in the
lwipopts.h file dans other #defines like ETHERNET_CONF_NB_TX_BUFFERS, etc.
I'm kind of lost in all those parameters.
Thanks a lot!!
Dany
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