Re: [lwip-users] How could let lwIP send more without wait ACK

[yueyue papa]

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
Description: Binary data

NoneLwIP_echo5000_result.pcap
Description: Binary data