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Merge branch 'lwip/acceptmbox_config' into 'master'

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change(lwip): Added macro to configure TCP accept mailbox size

See merge request espressif/esp-idf!27276
This commit is contained in:
Abhik Roy
2024-01-03 15:55:12 +08:00
parent 562b5795bd 0c41c4e1da
commit 0c99a58ff6
5 changed files with 18 additions and 1 deletions
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1
docs/en/api-guides/coexist.rst
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@@ -246,6 +246,7 @@ Setting Coexistence Compile-time Options
#) :ref:`CONFIG_LWIP_TCP_SND_BUF_DEFAULT`: reduce the default TX buffer size for TCP sockets.
#) :ref:`CONFIG_LWIP_TCP_WND_DEFAULT`: reduce the default size of the RX window for TCP sockets.
#) :ref:`CONFIG_LWIP_TCP_RECVMBOX_SIZE`: reduce the size of the TCP receive mailbox.
#) :ref:`CONFIG_LWIP_TCP_ACCEPTMBOX_SIZE`: reduce the size of the TCP accept mailbox.
#) :ref:`CONFIG_LWIP_UDP_RECVMBOX_SIZE`: reduce the size of the UDP receive mailbox.
#) :ref:`CONFIG_LWIP_TCPIP_RECVMBOX_SIZE`: reduce the size of TCPIP task receive mailbox.

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docs/en/api-guides/lwip.rst
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@@ -503,6 +503,7 @@ 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 also causes TCP sockets in the ``WAIT_CLOSE`` state to be closed and recycled more rapidly when 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 RAM usage at the expense of throughput, depending on usage.
- Reducing :ref:`CONFIG_LWIP_TCP_ACCEPTMBOX_SIZE` reduce RAM usage by limiting concurrent accepted connections.
- Reducing :ref:`CONFIG_LWIP_TCP_MSL` and :ref:`CONFIG_LWIP_TCP_FIN_WAIT_TIMEOUT` reduces the maximum segment lifetime in the system. This also causes TCP sockets in the ``TIME_WAIT`` and ``FIN_WAIT_2`` states to be closed and recycled more rapidly.
- Disabling :ref:`CONFIG_LWIP_IPV6` can save about 39 KB for firmware size and 2 KB RAM when the system is powered up and 7 KB RAM when the TCP/IP stack is running. If there is no requirement for supporting IPV6, it can be disabled to save flash and RAM footprint.
- Disabling :ref:`CONFIG_LWIP_IPV4` can save about 26 KB of firmware size and 600 B RAM on power up and 6 KB RAM when the TCP/IP stack is running. If the local network supports IPv6-only configuration, IPv4 can be disabled to save flash and RAM footprint.