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Low power mode 的一些方法請益

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  • T
    tonyone0902 last edited by tonyone0902 Apr 10, 2023, 3:48 AM Apr 10, 2023, 3:46 AM

    這陣子測試下來,我發現一開始進到 Ubuntu 時,整體功耗大約落在 3-4W ,似乎有點高,對一個 8nm 製程的 cpu 來說有點多,有一些應用情況是不需要跑那麼多應用因此需要更省電的方法,我目前試過一些作法:

    1. 調整 GPU governor:
    echo powersave > /sys/class/misc/mali0/device/devfreq/fb000000.gpu/governor
    
    1. 調整 CPU governor:
    echo powersave > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
    

    ps. cpu0/cpu5/cpu6/cpu7 是小核心

    1. 分別調整 cpu / gpu freq
    2. 把用不到的 cpu 關閉
    3. 關閉 wifi/BT

    我的應用主要是搭載鏡頭做辨識,當要進到省電模式時,所有軟體會關閉但是螢幕要開著(畫面則是進到一般 ubuntu desktop 畫面停留),請問還有其他建議可以省電的作法嗎?

    G 2 Replies Last reply Apr 12, 2023, 12:37 PM Reply Quote 1
    • G
      george @tonyone0902 last edited by Apr 11, 2023, 12:43 PM

      @tonyone0902
      1.设备树里边把不需要的模块可以disabled掉。
      2.AI算法使用RKNN处理,尽量不直接用CPU跑.
      3.应用层图像数据拷贝和格式转换使用RGA硬件模块实现,能效比高很多。
      4.如果是USB摄像头,MJPG解码使用rkmpp硬件解码。

      T 1 Reply Last reply Apr 12, 2023, 12:08 PM Reply Quote 0
      • T
        tonyone0902 @george last edited by Apr 12, 2023, 12:08 PM

        @george
        請教一下地四點有相關文件範例嗎?謝謝您的回覆

        1 Reply Last reply Reply Quote 0
        • G
          george @tonyone0902 last edited by Apr 12, 2023, 12:37 PM

          @tonyone0902
          如下命令就可以调用到jpeg硬件解码

          gst-launch-1.0 v4l2src device=/dev/video22 ! image/jpeg, width=1920, height=1080, framerate=25/1 ! jpegparse ! mppjpegdec ! videoconvert ! fpsdisplaysink  signal-fps-measurements=true sync=false
          
          E T 2 Replies Last reply Apr 13, 2023, 2:43 AM Reply Quote 0
          • E
            edwardzhou @george last edited by Apr 13, 2023, 2:30 AM

            USB摄像头接上,就出现一大堆 /dev/videoXX 设备,如何判别哪一个是真实可用的?

            G 1 Reply Last reply Apr 13, 2023, 4:31 AM Reply Quote 0
            • T
              tonyone0902 @george last edited by Apr 13, 2023, 2:43 AM

              @george 原來如此,謝謝

              1 Reply Last reply Reply Quote 0
              • G
                george @edwardzhou last edited by Apr 13, 2023, 4:31 AM

                @edwardzhou 默认video11

                1 Reply Last reply Reply Quote 0
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