Is this normal cpu usage for OPNSense running iperf3?

[phenoboy]

Here I'm running latest Proxmox 8.1 on Intel N100 with 4 Intel i226V nics with newest 6.8 kernel. I have assigned PCI passthrough for OPNSense VM for this NIC. I seem to be getting proper 1GB speeds from another machine connected to same switch so this is not a problem.

Left is 'top' command from Proxmox console which shows 217% CPU. It seems a bit high. I was expecting something like max 50%.

Is this normal CPU usage?

 

[BobhWasatch]

217% is half of the total CPU available. If you hit "1" in top you can see the individual core usage.

 

[phenoboy]

For the comparison I installed latest OpenWRT with PCI passthroug.

Same iperf3 command shows only ~20% of cpu usage.