How to improve the throughput of a device using AM5716 CPU?

Installing and Using OpenWrt
1

I have this customized device that is using an AM5716 CPU and installed with OpenWrt snapshot r14777-c4ab1b7dd9, I tried to run iperf3 test on it and my PC in order to test the maximum throughput.

on the device: iperf3 -s
on my PC: iperf3 -c 192.168.1.1
Result: around 790Mbps ~ 830Mbps

on my PC: iperf3 -c 192.168.1.1 -R
Result: around 940Mbps

Any idea why this happens? Is there any way to boost up the throughput of the device?
Thanks~

2

You shouldn't be using your device as an endpoint with iperf, and you are.

The way to run a throughput test is Iperf server <----------> OpenWrt device <-------------> Iperf client.