环境介绍

• 硬件环境: Jetson Xavier NX RTSS-X509 V2.0 emmc版
• 系统环境: Ubuntu 18.04.6 LTS (GNU/Linux 4.9.253-tegra aarch64)

•   nvidia@nvidia-desktop:~$ cat /etc/lsb-release
    DISTRIB_ID=Ubuntu
    DISTRIB_RELEASE=18.04
    DISTRIB_CODENAME=bionic
    DISTRIB_DESCRIPTION="Ubuntu 18.04.6 LTS"
  
    nvidia@nvidia-desktop:~$ cat /etc/realtimes/rts-l4t.version 
    rtso-3271_V1.0
  
    nvidia@nvidia-desktop:~$ cat /etc/nv_tegra_release 
    # R32 (release), REVISION: 7.1, GCID: 29818004, BOARD: t186ref, EABI: aarch64, DATE: Sat Feb 19 17:07:00 UTC 2022
  
    nvidia@nvidia-desktop:~$ lscpu
    Architecture:        aarch64
    Byte Order:          Little Endian
    CPU(s):              6
    On-line CPU(s) list: 0-5
    Thread(s) per core:  1
    Core(s) per socket:  2
    Socket(s):           3
    Vendor ID:           Nvidia
    Model:               0
    Model name:          ARMv8 Processor rev 0 (v8l)
    Stepping:            0x0
    CPU max MHz:         1907.2000
    CPU min MHz:         115.2000
    BogoMIPS:            62.50
    L1d cache:           64K
    L1i cache:           128K
    L2 cache:            2048K
    L3 cache:            4096K
    Flags:               fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp
  
    nvidia@nvidia-desktop:~$ sudo apt-cache show nvidia-jetpack
  

Jetson相关概念

NVIDIA JetPack SDK is the most comprehensive solution for building end-to-end accelerated AI applications. JetPack provides a full development environment for hardware-accelerated AI-at-the-edge development on Nvidia Jetson modules.

JetPack includes Jetson Linux with bootloader, Linux kernel, Ubuntu desktop environment, and a complete set of libraries for acceleration of GPU computing, multimedia, graphics, and computer vision. It also includes samples, documentation, and developer tools for both host computer and developer kit, and supports higher level SDKs such as DeepStream for streaming video analytics, Isaac for robotics, and Riva for conversational AI.

L4T Ubuntu：L4T 是linux for tegra的缩写，Tegra是集成了ARM架构的CPU和NVIDIA的GPU的处理器芯片，所以L4T Ubuntu就是为运行在基于arm架构的Tegra芯片上的linux ubuntu版本的操作系统，它是专门为Tegra定制的Ubuntu特殊版本。

• https://developer.nvidia.cn/zh-cn/embedded/jetpack
• Getting Started With Jetson Xavier NX Developer Kit

应用环境

一些应用的安装以及环境的清理

卸载一些应用

sudo apt-get purge libreoffice*
sudo apt-get clean

图形界面关闭与开启

关闭图形化界面

sudo systemctl set-default multi-user.target
sudo reboot

开启图形化界面

sudo systemctl set-default graphical.target
sudo reboot

安装jtop

sudo apt install python3-pip
sudo -H pip3 install -U jetson-stats

sudo systemctl restart jtop.service
sudo reboot
jtop

可以查看一些系统环境，更多运行环境可以通过jtop界面查看

$ jetson_release 
Software part of jetson-stats 4.1.5 - (c) 2023, Raffaello Bonghi
Model: NVIDIA Jetson Xavier NX Developer Kit - Jetpack 4.6.1 [L4T 32.7.1]
NV Power Mode: MODE_15W_6CORE - Type: 2
jtop:
 - Version: 4.1.5
 - Service: Active
Libraries:
 - CUDA: 10.2.300
 - cuDNN: 8.2.1.32
 - TensorRT: 8.2.1.8
 - VPI: 1.2.3
 - Vulkan: 1.2.70
 - OpenCV: 4.1.1 - with CUDA: NO