[nrf fromlist] [nrfconnect] Optimize packet buffer size #434
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Matter requires that regular Matter messages fit in IPv6 MTU of 1280 bytes so the default packet buffer size of 1583 bytes seems excessively large for some configurations. Especially that the buffers only hold the UDP payload in the case of non-LWIP transports. There are two exceptions to the above though: 1. Minimal mDNS uses the same packet buffer pool and mDNS message size is not limited to 1280 bytes, so shrinking the buffer size below MTU might have a negative impact on the mDNS behavior. 2. Matter allows definining so called large messages that can be bigger than 1280 bytes and sent over TCP, but that is not implemented yet and will likely require a different allocation mechanism. Signed-off-by: Damian Krolik <[email protected]>
This was referenced Apr 24, 2024
LuDuda
approved these changes
Apr 24, 2024
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Matter requires that regular Matter messages fit in IPv6 MTU of 1280 bytes so the default packet buffer size of 1583 bytes seems excessively large for some configurations. Especially that the buffers only hold the UDP payload in the case of non-LWIP transports.
There are two exceptions to the above though:
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