The ethernet speed of Xavier NX base on JetPack 5.0.2 is too slow

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
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24

Just want to clarify that I don’t have any answer to why UDP would be slower. What I am doing here is just to clarify the error cases first.

26

Hi @myers

Could you test your udp case with

$ iperf3 -c IP -u -b 0 -l 16k -t 60 -i 1

27

The transmission speed is 945 Mbits/sec. What is the difference between them? Are there some usage limitations?

nvidia@ubuntu:~$ iperf3 -c 192.168.100.100 -u -b 0 -l 16k -t 60 -i 1
warning: UDP block size 16384 exceeds TCP MSS 1448, may result in fragmentation / drops
Connecting to host 192.168.100.100, port 5201
[  5] local 192.168.100.101 port 59310 connected to 192.168.100.100 port 5201
[ ID] Interval           Transfer     Bitrate         Total Datagrams
[  5]   0.00-1.00   sec   113 MBytes   946 Mbits/sec  7220  
[  5]   1.00-2.00   sec   113 MBytes   945 Mbits/sec  7210  
[  5]   2.00-3.00   sec   113 MBytes   944 Mbits/sec  7210  
[  5]   3.00-4.00   sec   113 MBytes   945 Mbits/sec  7210  
[  5]   4.00-5.00   sec   113 MBytes   945 Mbits/sec  7210  
[  5]   5.00-6.00   sec   113 MBytes   945 Mbits/sec  7210  
[  5]   6.00-7.00   sec   113 MBytes   945 Mbits/sec  7210  
[  5]   7.00-8.00   sec   113 MBytes   945 Mbits/sec  7210  
[  5]   8.00-9.00   sec   112 MBytes   939 Mbits/sec  7160  
[  5]   9.00-10.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  10.00-11.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  11.00-12.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  12.00-13.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  13.00-14.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  14.00-15.00  sec   112 MBytes   941 Mbits/sec  7180  
[  5]  15.00-16.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  16.00-17.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  17.00-18.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  18.00-19.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  19.00-20.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  20.00-21.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  21.00-22.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  22.00-23.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  23.00-24.00  sec   113 MBytes   944 Mbits/sec  7210  
[  5]  24.00-25.00  sec   112 MBytes   944 Mbits/sec  7200  
[  5]  25.00-26.00  sec   112 MBytes   944 Mbits/sec  7200  
[  5]  26.00-27.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  27.00-28.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  28.00-29.00  sec   113 MBytes   945 Mbits/sec  7220  
[  5]  29.00-30.00  sec   112 MBytes   945 Mbits/sec  7200  
[  5]  30.00-31.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  31.00-32.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  32.00-33.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  33.00-34.00  sec   113 MBytes   946 Mbits/sec  7210  
[  5]  34.00-35.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  35.00-36.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  36.00-37.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  37.00-38.00  sec   112 MBytes   936 Mbits/sec  7140  
[  5]  38.00-39.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  39.00-40.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  40.00-41.00  sec   113 MBytes   946 Mbits/sec  7210  
[  5]  41.00-42.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  42.00-43.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  43.00-44.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  44.00-45.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  45.00-46.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  46.00-47.00  sec   111 MBytes   933 Mbits/sec  7110  
[  5]  47.00-48.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  48.00-49.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  49.00-50.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  50.00-51.00  sec   113 MBytes   946 Mbits/sec  7210  
[  5]  51.00-52.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  52.00-53.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  53.00-54.00  sec   113 MBytes   945 Mbits/sec  7210  
[  5]  54.00-55.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  55.00-56.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  56.00-57.00  sec   113 MBytes   946 Mbits/sec  7210  
[  5]  57.00-58.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  58.00-59.00  sec   113 MBytes   946 Mbits/sec  7220  
[  5]  59.00-60.00  sec   113 MBytes   946 Mbits/sec  7220  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Jitter    Lost/Total Datagrams
[  5]   0.00-60.00  sec  6.60 GBytes   945 Mbits/sec  0.000 ms  0/432540 (0%)  sender
[  5]   0.00-60.00  sec  6.60 GBytes   945 Mbits/sec  0.107 ms  5/432540 (0.0012%)  receiver
28

Hi WayneWWW,

Could you explain the status? Why can performance be improved? Are there some usage limitations?

29

The document of iperf is already there over the Internet. Read the document first to understand why those parameters are in use.

30

Hi WayneWWW,

Thank you for your help. I know you adjust the bandwidth and buffer setting. But we don’t adjust any iperf settings and the udp speed can reach 1000 Mbits/sec on JetPack 4.6.1. Where can I find the instructions about the gigabit ethernet of JetPack 5.0.2 in NVIDIA document?

31

Sorry. There is no such document released.

33

Just found time to test it now. Actually I must admit that I cannot reproduce the issue even with my original test. Seems to be something sporadic. Will report back if I notice it again.

34

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