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Merge branch 'optimize/fast_recycle_of_tcp_pcb_when_close_tcp' into 'master'

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Lwip:add TCP Fin2 timeout configuration

See merge request espressif/esp-idf!19881
This commit is contained in:
Jiang Jiang Jian
2022-10-19 12:00:09 +08:00
parent 3d0e09c096 bfaaa86775
commit f51e5d69fc
4 changed files with 14 additions and 2 deletions
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docs/en/api-guides/lwip.rst
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@@ -448,6 +448,7 @@ Most lwIP RAM usage is on-demand, as RAM is allocated from the heap as needed. T
- Reducing :ref:`CONFIG_LWIP_MAX_SOCKETS` reduces the maximum number of sockets in the system. This will also cause TCP sockets in the ``WAIT_CLOSE`` state to be closed and recycled more rapidly (if needed to open a new socket), further reducing peak RAM usage.
- Reducing :ref:`CONFIG_LWIP_TCPIP_RECVMBOX_SIZE`, :ref:`CONFIG_LWIP_TCP_RECVMBOX_SIZE` and :ref:`CONFIG_LWIP_UDP_RECVMBOX_SIZE` reduce memory usage at the expense of throughput, depending on usage.
- Reducing :ref:`CONFIG_LWIP_TCP_MSL`, :ref:`CONFIG_LWIP_TCP_FIN_WAIT_TIMEOUT` reduces the maximum segment lifetime in the system. This will also cause TCP sockets in the ``TIME_WAIT``, ``FIN_WAIT_2`` state to be closed and recycled more rapidly
- Disable :ref:`CONFIG_LWIP_IPV6` can save about 39 KB for firmware size and 2KB RAM when system power up and 7KB RAM when TCPIP stack running. If there is no requirement for supporting IPV6 then it can be disabled to save flash and RAM footprint.
.. only:: SOC_WIFI_SUPPORTED