[lwip-users] Re: About the throughput of LWIP

[铁石]

lwip-users-request,
       Another setting that I think would imporve the perference is the 
PBUF_POOL_BUFSIZE, orginal 128 byte is too small. It would case many times of 
pbuf alloc. I set it to 2K so that there's only one pbuf alloc with a package
come in.If your cpu is slow, this would help.Of course it would use more ram 
on the other hand.  My wnd and snd_buf setting are half small then yours!
With a ucOS, a TCP echo app, it take 550K ram totally.
>hi,
>
>    I test the throughput again. Now the speed can reach 12.9Mbps. I also 
> measure it with real payload without protocol header.
>    Here are some of the settings:
>MSS: 1460
>TCP_WND: 24000
>TCP_SND_BUF: 16*MSS
>TCP_SND_QUEUELEN: 16
>
>
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　　　　　　　　　　2006-04-18