The test case is echo 5000 bytes. Server will make echo after get 5000 bytes.
NoneLwIP: 8~11: Server 192.168.8.94 echo continuous data to the client. In the server side log, I unable to confirm whether the TCP/IP will send continues data to server without wait ACK. The echo is finished with in 5s. LwIP: 9, 10: Serve only echo two 1460 segment. Why server not send much more data segment as None LwIP client. >From the log the echo finished within 15s. ############# /* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP segments. */ #define MEMP_NUM_TCP_SEG 16 /* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active timeouts. */ #define MEMP_NUM_SYS_TIMEOUT 16 /* TCP Maximum segment size. */ #define TCP_MSS 1460//1024 /* TCP sender buffer space (bytes). */ #define TCP_SND_BUF (TCP_MSS*6) /* TCP sender buffer space (pbufs). This must be at least = 2 * TCP_SND_BUF/TCP_MSS for things to work. */ #define TCP_SND_QUEUELEN (2* TCP_SND_BUF/TCP_MSS*2) /* 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/4) /* TCP receive window. */ #define TCP_WND (TCP_MSS*22) //(8192) ############################## Lee
lwIP_echo5000_result.pcap
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NoneLwIP_echo5000_result.pcap
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