RPI4 and Iperf3 limitations

[/RaspberryPi]

I am attempting to use 2 4gb Pi4’s running the latest Raspbian and Iperf3 to generate 25MB/s bi-directional data to test a network hardware. I am having trouble from what I believe to be overwhelming the Pi’s cpu and generating a small amount of errors even when I only have a single 1gb Netgear switch between them, on average 0.005% over an hour long test.

I have tried using nice to reduce interrupts.

2 instances of Iperf (one in each direction)

CPU affinity to bond each instance of iperf3 to its own core.

I have seen minor improvements once I get the CPU load > 50% but nothing seems to remove the errors completely when run for longer durations

Server : iperf3 -s -V -i 1 —timestamps Client : iperf3 -c 192.xxx.xxx.xxx -b -fM 200m -V -i 1 -u -t 3600 —bidir —timestamps
submitted by /u/ZigTheZax
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