openwrt
Limit mss fixup to connection start
Use conntrack flow packet counter to limit mss fixup filter to the very start of connection flows where adjustable syn/syn can possibly appear.
Two initial packets +
sysctl net.ipv4.tcp_syn_retries net.ipv4.tcp_synack_retries net.ipv4.tcp_syn_retries = 6 net.ipv4.tcp_synack_retries = 5
Signed-off-by: Andris PE [email protected]
Other heuristics take twice bytecode like !assured/assured & ct tcp, Rises throughput ~10% in default case both unicast and forward.
Any idea when your fw4 improvements will be accepted into a build with the new build 23.05.5 having no firewall updates? They are still all pending incorporation into master by jow.
Thanks Peter
Message ID: @.***>
He comes here twice a year, if he misses few watch shifts ill make a branch and add readme ;-)
Shouldn't the hardcoded 14 value be calculated dynamically if it relates to net.ipv4.tcp_syn_retries and net.ipv4.tcp_synack_retries ?
Also this looks like very specific, hard to maintain low level optimizations - what's the significance of this change? Are there any throughput tests?
This is about state of internet. Windows limits all retransmits to 5 to https://support.microsoft.com/en-us/topic/how-to-modify-the-tcp-ip-maximum-retransmission-time-out-7ae0982a-4963-fa7e-ee79-ff6d0da73db8 Thus one obtained from linux covers it. If you achieve more than few retransmits under normal operation, mss size is least of your woes.