We have recently upgraded our uplink from 100/30mbps to 250/50 here. I was hoping to get the new speed with our current setup, but it seems like the Archer router is the bottleneck. At speedtest.net, I get only around 180mbps max. If I bypass the tplink router and hook straight into the uplink, I get 250-260mbps...
Looking at top during the test shows the CPU is maxed out on softirq, is there a driver setting to tweak so that I can max out the network correctly? Maybe something to offload IRQs or get the driver in polling mode?
I am not sure, but following data from https://openwrt.org/toh/hwdata/tp-link/tp-link_archer_c2_ac750, that router uses at mt7620 chip. Info from Mediateks website says that chip is capable of 2 Gbps routing. Things I can think off that have an impact on speed are having a lot of additional features and packages activated (e.g. Complex Firewall rules, VPN etc.), you connecting via wifi or using software flow offloading. I would try to enable hardware flow offloading (and disable software flow offloading), if that is possible with that hardware and you can find it in Luci. Also use a cable, not wifi to connect to the router and check speeds again.
The rule set is pretty simple... just a bastion host and a couple more port forwards.
that however, worked! after checking "Software flow offloading" and then "Hardware flow offloading", i can get 264mbps in! whoohoo!
For those finding this thread later, the setting is under Network -> Firewall -> Routing/NAT Offloading.
(as an aside, why on heart is "Hardware flow offloading" hidden behind "Software flow offloading"? I can't actually "disable software flow offloading", because that hides the "Hardware" button...)
oh of course all this is tested with wires. i also checked swconfig dev switch0 show and confirmed those were gigabit links.
i also checked