You’re supposed to set SQM lower than the WAN throughput. I think you’re right that by default it limits it by about 10%. There was some study over a decade ago on this that showed 20-25% limit is best for maximizing responsiveness under load. It’s not possible to effectively schedule packets if there’s no headroom.
I did go back and test and I don’t see the bandwidth limited around 750mbits. I upgraded openwrt since I originally setup QoS. Now I can get my full connection speed if I set the limit artificially high.
You’re supposed to set SQM lower than the WAN throughput. I think you’re right that by default it limits it by about 10%. There was some study over a decade ago on this that showed 20-25% limit is best for maximizing responsiveness under load. It’s not possible to effectively schedule packets if there’s no headroom.
I did go back and test and I don’t see the bandwidth limited around 750mbits. I upgraded openwrt since I originally setup QoS. Now I can get my full connection speed if I set the limit artificially high.