igb on APU4 with OPNS 21.7

[lynix]

@cookiemonster: Any changes regarding throughput? And did you keep those tunables?

My APU2 delivers ~400 Mbit/s iperf3 NAT throughput with a single connection and ~938 Mbit/s with 4 concurrent streams. I could swear I had that almost-gigabit throughput on 21.1.9 with one connection but I've got no data to prove it.

[cookiemonster]

Hi lynxix. My fresh install naturally wiped out my tunables in rc.conf.local and only kept the ones from the gui.
There I only have
hw.igb.rx_process_limit = -1
hw.igb.tx_process_limit = -1
legal.intel_igb.license_ack = 1
I've left those and monitoring but unfortunately I haven't had the opportunity to plug a machine into the WAN side to test NAT throughput. It's in my to-do list.
I've done iperf tests to public iperf servers and the throughput seems unchanged from 21.7 with tunables for igb.
The problem for me is that these I can't tell if they're limited on the public servers. I really need to do the test internally by myself.
My ISP service is just over 500 mbps down. I'd love to know how close or far from it I am.
Also I need to research what it means for the APU with the change to em that I think 21.7 changed to.
How are your tests going?

[lynix]

Most of the tunables have changed with 21.7. Only one of the three you have mentioned is still there but under a different name:

Code Select Expand

hw.igb.rx_process_limit  --> hw.em.rx_process_limit

Credit goes to Gary7 in this thread for clarifying this. For me that tunable doesn't seem to have an effect at all anymore.

With my APU2 I'm reaching ~300 Mbit/s NAT throughput when using a single connection and ~938 Mbit/s with four connections. An important thing to keep in mind is that if you run 'iperf3' on the box itself it will be CPU-bottlenecked, so always measure throughput between two machines with the APU in between.

My ISP gives me ~600 Mbit/s downstream so I really would like to reach that with a single connection. But I have to admit I'm not absolutely sure I had that with 21.1.9. Maybe I just never noticed.