Re: [lwip-users] Struct packing/alignment problems

[d99tibr]

Ok, I have improved the performance of my ethernet driver and written a simple 
ftp client for lwip.
I transfer a 50,000,000 Byte file from onboard SDRAM to a war-ftp server 
running on a PC. (File is written to disk on the PC)
I use TCP copy, so each packet is copied from SDRAM to internal RAM prior to 
transmission.
The DM642 board is connected to the same 100Mbps switch as the PC.
With this setup I get 30.9Mbit/s.

There are however still things to improve in my ethernet driver, so I expect 
the performance of a fully optimised system to be at least equal to bf3Net.

I have not yet measured RX performance.

Timmy

Quoting Timmy Brolin <address@hidden>:

> Leon Woestenberg wrote:
> 
> > Timmy Brolin wrote:
> >
> >> Leon Woestenberg wrote:
> >>
> >>> Out of curiosity; which DSP exactly and do you have performance figures
> >>> of lwIP moving data in and out? 
> >>
> >> The DSP is the TMS320DM642.
> >> What kind of performance figures do you want?
> >
> > We had been interested in bf3Net in the past, which is a very good
> > TCP/IP stack for DSPs. I just wondered how lwIP compared against it,
> > as we do not have DSPs with network support to test with yet.
> >
> > There are a few figures for the '642 mentioned here:
> >
> > http://www.traquair.com/products/windmill/bf3net_perf.html
> >
> > Regards, Leon. 
> 
> My Ethernet driver is still far from optimal, and I have not yet fired 
> up the cache.
> I will post some numbers as soon as I have some meaningful results.
> 
> Timmy
> 
> 
> 
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> 




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