Hello everyone. I'm using a setup consisting of a 4pffc SOM connected to a Jetson Orin NX (nvidia hardware). I tested the bandwidth of the system when Usb::SUPER_PLUS using the oak_bandwidth_test.py script in depthai-experiments.

  • The Jetson Orin NX accepts up to 10gb/s (USB 3.2 Gen 2 ) in host mode and 5gb/s (USB 3.2 Gen 1)in device mode. Since the SOM is the device i issume the jetson is able to consume all incoming datas. The cable is also USB 3.2 Gen 2 compliant.
  • As you can see in the code , the bandwidth was set to SUPER_PLUS.

I get the following results from the script :

Downlink 2414.5 mbps
Uplink 2229.0 mbps

So the bandwidth is clearly stuck at 5gb/s.

Can anyone help ?

    BearrGod
    That is a Jetson issue. The port is not Gen2 is seems, or Jetson has some bandwidth negotiations. Try updating jetpack/checking the system settings to possibly toggle performance modes (or the likes).

    Thanks,
    Jaka

        13 days later

        jakaskerl I contacted the Jetson forums and got no answer but on the jetson , the device is clearly marked as USB3.2 , because after running dmesg --follow , here is what i found.

        [  749.253884] usb 2-2: new SuperSpeedPlus Gen 2 USB device number 4 using tegra-xusb
[  749.284330] usb 2-2: New USB device found, idVendor=03e7, idProduct=f63b, bcdDevice= 1.00
[  749.284340] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  749.284346] usb 2-2: Product: Luxonis Device
[  749.284350] usb 2-2: Manufacturer: Intel Corporation
[  749.284354] usb 2-2: SerialNumber: 14442C109142AFCF00

        Is there a possibility that the SOM it not delivering the bandwidth as it should be ? Would you propose a setup to test that ?

            BearrGod
            I'll check at the office tomorrow, but afaik all devices should support Gen2 usb.

            Thanks,
            Jaka

              BearrGod
              Works fine on my side with R5 Oak-FFC 4P. Recheck cable and jetson USB mode.

              Thanks,
              Jaka