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Accelerate petalinux-build

oleb0n

I prefer to use Petalinux with Ubuntu root filesystem. It feels like I make plenty of unnecessary steps, so please help me avoid them. Here some questions that I need to clarify:

      1. Do I really need to run "petalinux-config -c rootfs" and add dropbear if I'll use Ubuntu?

     2. Same question for "petalinux-config -c kernel" and Realtek 8152/8153 USB networking drivers (which I really use)?

     3. I found that if I unselect DisplayDriver in ZYNQ confiurator in Vivado the petalinux-build does not waste hours to add OpenCV. Is OpenCV required for the display driver or it is pre-selected just in case?

     4. I also guess that UltraZED  BSP is inflated with multiple packages that nobody needs (like Arduino), but unlike other boards if I do not use BSP in the end a get "Bad magic" message because something is wrong with device tree. It could be great to have some minimum BSP limited to serial port, ethernet and USB support.

  • 0

    If you plan to boot an Ubuntu rootfs then, no, you don't need to configure the PetaLinux rootfs to add dropbear.

     

    If you don't plan on using the USB interface with a USB <-> Ethernet adapter then, no, you don't need to configure the kernel to add those drivers.

     

    The Avnet UltraZed BSPs are meant to also be used a stepping stone for Vitis and Vitis-AI development, and thus include packages like OpenCV that you may not need if you don't plan on using Vitis or Vitis-AI.  To be specific - IIRC - OpenCV is a requirement for Vitis-AI.  If you want to minimize build time and don't need it, you can configure the rootfs to remove this package.

     

    To mount a Ubuntu rootfs at boot you need to be sure to modify the PetaLinux config.  This is described in Xilinx UG1144 (https://www.xilinx.com/support/documentation/sw_manuals/xilinx2019_2/ug1144-petalinux-tools-reference-guide.pdf ):

    image

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    --Tom

  • 0 in reply to narrucmot

    Tom, thank you for the reply. 

     

    So, if I am using Ubuntu rootfs, I can run "petalinux-config -c rootfs" and un-select all packages included by default like OpenCV, gstreamer, X11? Is there a way to remove Arduino? In general, we are using OpenCV, but it is installed to the Ubuntu rootfs and all I need to update is PL part of the same project.

     

    In what case do I need to run "petalinux-config -c kernel"? In several tutorials they run both -c kernel and -c rootfs without any changes to default settings, while sometimes people suggest to run "petalinux-build" right after hardware description was imported.

    It looks like if default settings are OK, I can skip "-c kernel"?

  • 0 in reply to oleb0n

    If you plan to use an Ubuntu rootfs you can skip the PetaLinux "petalinux-config -c rootfs" altogether and if you are striving to minimize build time then examine the <project>/project-spec/configs/rootfs_config file and disable the packages that are enabled (<package>=y).

     

    Generally speaking, and especially in your case of using an Ubuntu rootfs, unless you know you need to add a kernel driver module or change any kernel config settings you can skip 'petalinux-config -c kernel'.  You can run 'petalinux-build' right after importing the hardware description, making any necessary changes to the device tree (<project>/project-spec/meta-user/recipes-bsp/device-tree/files/system-user.dtsi), and making any necessary changes to the boot options, etc. ('petalinux-config').

  • 0

    Hi,

    Regarding DisplayDriver in ZYNQ configurator in Vivado, how to unselect DisplayDriver in Vivado?

    I don`t need OpenCV since it makes a huge execution of petalinux-build which never finishes.

    Thank you in advance.

    Best Regards,

    Fernando