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    A New Chapter for MagicMirror: The Community Takes the Lead
    Read the statement by Michael Teeuw here.

    Electron CPU usage

    Scheduled Pinned Locked Moved Troubleshooting
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    • cruunnerrC Offline
      cruunnerr
      last edited by cruunnerr

      Well,

      i had MM 2.1.2 installed, so i needed to use the 2.1.0 way…

      but i actually got it running with “DISPLAY=:0 npm start”

      then i just copied the installed modules folders to the new directory and copied my “old” config.js but that didn’t work.

      i actually install the 3rd party modules manual. hopefully my old config.js will work then.

      But thank you anyway

      edit:

      so,

      i got MM2.1.0 running with electron 1.4.15

      have had a few problems, but now all works great.

      1 Reply Last reply Reply Quote 0
      • K Offline
        knubbl
        last edited by knubbl

        Bad issue with electron. When i downgrade to 1.4.15 the default calender module does not work

        ok…calendar works fine

        1 Reply Last reply Reply Quote 0
        • cruunnerrC Offline
          cruunnerr
          last edited by cruunnerr

          Cause i didn’t want to run 2.1.0 and also got many errors every time i looked in the logs, i decided to do a fresh install and try again.

          So i just installed a fresh Raspbian stretch lite and followed this guide: https://github.com/MichMich/MagicMirror/wiki/Jessie-Lite-Installation-Guide

          after the first start i got 80-85% cpu usage just playing the default modules.

          so i went into my MagicMirror folder and just typed “npm install electron@1.4.15”.
          It said that the version seems to be invalid, but after a reboot i tooled a look in the
          “/home/pi/MagicMirror/node_modules/electron/dist/version”
          and saw a 1.4.15 shown.

          thats all.

          so in my experience its just the electron version needed to downgrade. Neither the OS nor the MagicMirror Version needs to be downgraded.

          Loaded up a video: https://youtu.be/ak_mEMuLpYc

          shows “nmon-stats” while adding Traffic- and News-Module via Remote Control
          Still shows peaks when animation comes, but its fluety anyway

          1 Reply Last reply Reply Quote 0
          • WeatherGeekW Offline
            WeatherGeek
            last edited by

            I have been having the issue, thanks so much for all the detailed information! I am going to do a fresh install with Jessy and downgrade Electron and MM2.

            1 Reply Last reply Reply Quote 0
            • M Offline
              mattn
              last edited by mattn

              First off, apologies for the necro! But I had to reinstall MM this weekend and came across this same issue. After a fair bit of time reinstalling/googling, I managed to resolve it by adding the following to /etc/environment

              ELECTRON_FORCE_WINDOW_MENU_BAR=1
              

              So thought I’d post it here in case anyone else experiences this.
              I’ve had the default install running for a while since adding the fix and my load avg has dropped from 6+ to “0.00, 0.02, 0.02” and electron seems to peak at around 7% every ~30s for about 2s. The rest of the time it isn’t even visible in top’s list.

              credit to reddit: https://www.reddit.com/r/kde/comments/5x9t7j/electron_app_high_cpu_usage/
              Edit: After adding my usual modules, electron’s CPU usage has gone up to a fairly constant ~9% across 3 processes.

              top - 00:04:33 up 25 min,  3 users,  load average: 0.06, 0.13, 0.13
              Tasks: 156 total,   2 running, 154 sleeping,   0 stopped,   0 zombie
              %Cpu(s):  2.0 us,  0.4 sy,  0.0 ni, 97.6 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
              KiB Mem:    947732 total,   486072 used,   461660 free,    26476 buffers
              KiB Swap:   102396 total,        0 used,   102396 free.   240288 cached Mem
              
                PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
               1387 pi        20   0  300260  98384  55840 S   4.9 10.4   0:45.48 electron
               1394 pi        20   0  286500  68700  49420 S   2.0  7.2   0:23.08 electron
               1358 pi        20   0  436408  78528  57656 S   1.0  8.3   0:19.25 electron
              

              Edit2: Left it running over night, and it’s stable:

              top - 07:51:22 up  8:12,  3 users,  load average: 0.24, 0.23, 0.17
              Tasks: 153 total,   1 running, 152 sleeping,   0 stopped,   0 zombie
              %Cpu(s):  2.1 us,  0.3 sy,  0.0 ni, 97.5 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
              KiB Mem:    947732 total,   543280 used,   404452 free,    34664 buffers
              KiB Swap:   102396 total,        0 used,   102396 free.   271040 cached Mem
              
                PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
               1798 pi        20   0  301180  99652  56580 S   5.3 10.5  22:54.84 electron
               1805 pi        20   0  321060  79368  50868 S   2.6  8.4  11:36.49 electron
               1770 pi        20   0  480972  82744  58648 S   1.0  8.7   7:20.91 electron
              
              D M 2 Replies Last reply Reply Quote 3
              • D Offline
                Doum @mattn
                last edited by

                @mattn I am pretty new to linux/raspbian… I do not have any file/folder under /etc with the name environment?

                Should i create a file and add this line in? add it somewhere else?

                Thanks

                M 1 Reply Last reply Reply Quote 0
                • N Offline
                  nparab
                  last edited by

                  Thanks v.much to everyone on this forum. I just downgraded Electron to 1.4.15, without downgrading either MagicMirror2 or my OS, and my CPU usage and temperature are significantly down. But I’m facing yet another problem because of this downgrading of Electron. My MMM-PIR-Sensor module is giving this error:

                  App threw an error during load
                  Error: Module version mismatch. Expected 50, got 54.
                      at Error (native)
                      at process.module.(anonymous function) [as dlopen] (ELECTRON_ASAR.js:173:20)
                      at Object.Module._extensions..node (module.js:583:18)
                      at Object.module.(anonymous function) [as .node] (ELECTRON_ASAR.js:173:20)
                      at Module.load (module.js:473:32)
                      at tryModuleLoad (module.js:432:12)
                      at Function.Module._load (module.js:424:3)
                      at Module.require (module.js:483:17)
                      at require (internal/module.js:20:19)
                      at bindings (/home/pi/MagicMirror/modules/MMM-PIR-Sensor/node_modules/bindings/bindings.js:81:44)
                  Whoops! There was an uncaught exception...
                  Error: Module version mismatch. Expected 50, got 54.
                      at Error (native)
                      at process.module.(anonymous function) [as dlopen] (ELECTRON_ASAR.js:173:20)
                      at Object.Module._extensions..node (module.js:583:18)
                      at Object.module.(anonymous function) [as .node] (ELECTRON_ASAR.js:173:20)
                      at Module.load (module.js:473:32)
                      at tryModuleLoad (module.js:432:12)
                      at Function.Module._load (module.js:424:3)
                      at Module.require (module.js:483:17)
                      at require (internal/module.js:20:19)
                      at bindings (/home/pi/MagicMirror/modules/MMM-PIR-Sensor/node_modules/bindings/bindings.js:81:44)
                  

                  Any help on fixing this would be appreciated.

                  1 Reply Last reply Reply Quote 0
                  • N Offline
                    nparab
                    last edited by nparab

                    Fixed it! I just went to the modules/MMM-PIR-Sensor directory and did

                    npm install
                    

                    That fixed it.

                    1 Reply Last reply Reply Quote 1
                    • M Offline
                      mattn @Doum
                      last edited by

                      @Doum Yeah, just create the file, paste that line, save and reboot.

                      1 Reply Last reply Reply Quote 1
                      • M Offline
                        martinkooij @mattn
                        last edited by martinkooij

                        @mattn What version of electron are you running? I downgraded to 1.4.15 electron, have v6.12.3 nodejs and 2.3.1Magic Mirror. I set the environment variable as you indicated. CPU usage goes down remarkably, although not as much as in your case.

                        Did you also got rid of a memory leak? I start with 43% free and this falls to 7% after a day. Stays between 5%-7% for a few days and then after 3-5 days my mirror halts completely with E_NOMEM panic in the log files. Any reader knows of handy memory leak analysistools for nodejs? It seems you keep on having 50% used / 50% free… Not me ;(.

                        top - 20:03:02 up 21:14,  3 users,  load average: 0,30, 0,33, 0,41
                        Tasks: 165 total,   2 running, 163 sleeping,   0 stopped,   0 zombie
                        %Cpu(s):  8,6 us,  4,5 sy,  0,0 ni, 86,9 id,  0,0 wa,  0,0 hi,  0,0 si,  0,0 st
                        KiB Mem:    949580 total,   907688 used,    41892 free,    60200 buffers
                        KiB Swap:   102396 total,     5172 used,    97224 free.   444532 cached Mem
                        
                          PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
                         1178 pi        20   0  828888 244624  65840 R  22,5 25,8 327:41.98 electron
                         1216 pi        20   0  603272 349144 290184 S  13,6 36,8 132:11.73 electron
                          666 root      20   0  200848  58756  28796 S  12,2  6,2 131:39.07 Xorg
                        24453 pi        20   0    5224   2580   2148 R   1,0  0,3   0:02.03 top
                        
                        M 1 Reply Last reply Reply Quote 0
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