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Merge branch 'feature/set_default_snd_buf_to_2880' into 'master'

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feat(lw-ip): set default tcp send buffer to 2880 and default receive buffer to 5760

See merge request sdk/ESP8266_RTOS_SDK!1480
This commit is contained in:
Dong Heng
2020-07-20 20:24:38 +08:00
parent 3e96bff703 9faaaf2fd8
commit 02c5155def
1 changed files with 5 additions and 5 deletions
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10
components/lwip/Kconfig
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@ -392,7 +392,7 @@ menu "LWIP"
config LWIP_TCP_SND_BUF_DEFAULT config LWIP_TCP_SND_BUF_DEFAULT
int "Default send buffer size" int "Default send buffer size"
default 5744 # 4 * default MSS default 2880 # 2 * default MSS
range 2440 65535 if !LWIP_WND_SCALE range 2440 65535 if !LWIP_WND_SCALE
range 2440 1024000 if LWIP_WND_SCALE range 2440 1024000 if LWIP_WND_SCALE
help help
@ -402,14 +402,14 @@ menu "LWIP"
with lwip_setsockopt(s, TCP_SNDBUF, ...). with lwip_setsockopt(s, TCP_SNDBUF, ...).
This value must be at least 2x the MSS size, and the default This value must be at least 2x the MSS size, and the default
is 4x the default MSS size. is 2x the default MSS size.
Setting a smaller default SNDBUF size can save some RAM, but Setting a smaller default SNDBUF size can save some RAM, but
will decrease performance. will decrease performance.
config LWIP_TCP_WND_DEFAULT config LWIP_TCP_WND_DEFAULT
int "Default receive window size" int "Default receive window size"
default 5744 # 4 * default MSS default 5760 # 4 * default MSS
range 2440 65535 if !LWIP_WND_SCALE range 2440 65535 if !LWIP_WND_SCALE
range 2440 1024000 if LWIP_WND_SCALE range 2440 1024000 if LWIP_WND_SCALE
help help
@ -429,8 +429,8 @@ menu "LWIP"
help help
Set TCP receive mail box size. Generally bigger value means higher throughput Set TCP receive mail box size. Generally bigger value means higher throughput
but more memory. The recommended value is: LWIP_TCP_WND_DEFAULT/TCP_MSS + 2, e.g. if but more memory. The recommended value is: LWIP_TCP_WND_DEFAULT/TCP_MSS + 2, e.g. if
LWIP_TCP_WND_DEFAULT=14360, TCP_MSS=1436, then the recommended receive mail box size is LWIP_TCP_WND_DEFAULT=14440, TCP_MSS=1440, then the recommended receive mail box size is
(14360/1436 + 2) = 12. (14440/1440 + 2) = 12.
TCP receive mail box is a per socket mail box, when the application receives packets TCP receive mail box is a per socket mail box, when the application receives packets
from TCP socket, LWIP core firstly posts the packets to TCP receive mail box and the from TCP socket, LWIP core firstly posts the packets to TCP receive mail box and the