Traffic Shaper performance on gigabit upload

[easyrhino]

Hello!

I'm not even sure if this is the right subforum...

I recently got symmetrical gigabit at home, and was trying to set up traffic shaping**, and while download speeds are good,  upload speeds are not good.

Hardware is a Xeon E3-1225, the NICs are intel X540's on the motherboard (only using gigabit lan inside the house).

If I don't have any upload pipe enabled at all, then upload speeds via speedtest are reliably 750mbps to 900mbps.

If I enable the upload pipe, and select any one of the schedules (and zero other shaper options enabled) then my max upload speed is limited to 450mbps or as low as 180mbps depending on the scheduler.

and again, download speeds remain good with PIE enabled and Weighted Fair Queuing as the scheduler.

Is there any expectation that I could get gigabit traffic shaping on uploads?  If so, what is the recommended config?  Could there be a hardware or other bottleneck?  (cpu utilization remains low on tests)

** honestly, it's gigabit upload speed.  Leaving off traffic shaping is fine, it hasn't had any negative real life impacts on our house.  I'm just trying to enable the settings because they're fun.

[hushcoden]

Not sure if this can help: https://maltechx.de/en/2021/03/opnsense-setup-traffic-shaping-and-reduce-bufferbloat/