Hi All, I use lwIP+PPP in GPRS environment. I am still meet the response slow problem.
The 80% time socket is used in this way connect --> send --(1xx bytes) ---> receive (1xx bytes)---> disconnect. What is suitable configureation for my case? My current configuration is ##################### #define TCP_QUEUE_OOSEQ 0 /* TCP Maximum segment size. */ #define TCP_MSS 1024 /* TCP sender buffer space (bytes). */ #define TCP_SND_BUF (TCP_MSS*4) /* TCP sender buffer space (pbufs). This must be at least = 2 * TCP_SND_BUF/TCP_MSS for things to work. */ #define TCP_SND_QUEUELEN (4 * TCP_SND_BUF/TCP_MSS) /* TCP writable space (bytes). This must be less than or equal to TCP_SND_BUF. It is the amount of space which must be available in the tcp snd_buf for select to return writable */ #define TCP_SNDLOWAT (TCP_SND_BUF/2) /* TCP receive window. */ #define TCP_WND (TCP_MSS*4) /*minye.li original is 2048*/ ########################## The slow is cause in send, but the peer has a long delay to get the data. I am unable to confirm where the long delay comes from. Lee
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