Orin NX Ethernet Tx Throughput not as quick as it should be?

[Ursula]

I am finding that Ethernet throughput on Orin NX native Ethernet seems to be a bit disbalanced, Rx is working well and getting the expected speeds for GigE but Tx is not reaching the same level and it can’t seem to push out more than ~815Mbit/s:

$ iperf3 -c 192.168.1.157 -u -b 950M -R
Connecting to host 192.168.1.157, port 5201
Reverse mode, remote host 192.168.1.157 is sending
[ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
[  5]   0.00-1.00   sec  97.2 MBytes   816 Mbits/sec  0.003 ms  2664/73087 (3.6%)  
[  5]   1.00-2.00   sec  97.2 MBytes   815 Mbits/sec  0.004 ms  0/70385 (0%)  
[  5]   2.00-3.00   sec  97.1 MBytes   814 Mbits/sec  0.004 ms  0/70294 (0%)  
[  5]   3.00-4.00   sec  97.1 MBytes   815 Mbits/sec  0.004 ms  0/70331 (0%)  

This may be related to my posts on the Xavier NX regarding similar observed issues with the egress path being slow e.g. R35.2.1 PCIe i210 throughput slow

[WayneWWW]

Thanks for reporting. Let us check if we can reproduce.

[carolyuu]

Hi Ursula,

Please run below command before test:

$ sudo nvpmodel -m 0
$ sudo jetson_clocks

[Ursula]

Many thanks for the feedback. It seems that just running sudo jetson_clocks without even running nvpmodel seems to be sufficient to fix this.