Read the statement by Michael Teeuw here.
Electron CPU usage
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Got a few spare SD cards so I installed a fresh new Jessie and MagicMirror-develop(which installed Electron 1.7.6). Well, I’m sad to report that Electron 1.7.6 gags on a default installation of MM. Using nmon for stats, Electron CPU usage soared over 225% every time there was a transition of both the Compliments module and the newsfeed module. When either made a transition by themselves, CPU usage was well over 140%. There was not much “at rest” time because newsfeed rotates pretty quickly by default. However, rare moments of “at rest” time showed near normal CPU usage of about 15%.
I did this as a test, to satisfy my own curiosity, because my Pi3 doesn’t have the issues discussed here. Using the same Pi3 that hosts my mirror, running Jessie and MM 2.1.0 and Electron 1.4.15, it performs amazingly well, with no outrageous CPU usage or heat issues (fan installed).
The same Pi3, with the newest develop installation of MM, which installs Electron 1.7.6, is hard pressed to handle the default of 4 modules adequately.
Needless to say, I’m going back to my original SD card, with Jessie, MM 2.1.0 and Electron 1.4.15
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@Mykle1 Brilliant work and testing mate :)
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A few words of caution about Raspbian Stretch
I’ve been doing some testing recently, mostly concerning CPU usage with different versions of Raspian and MM. Once I got bluetooth to work, I continued testing with newer and newer versions, until I got to Raspbian Stretch.
The firmware update that accompanies Stretch disabled my Wifi and Bluetooth, and no amount of backward flashing to earlier firmware versions is fixing the issue. When I say disabled, I mean the Pi doesn’t recognize its own Wifi or Bluetooth adapter, as if it doesn’t have them. Google it BEFORE you attempt this upgrade.
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I’ve just downgrade to the electron@1.4.15 version : no more high CPU usage !
Thanks ! -
@r3z3 said in Electron CPU usage:
I’ve just downgrade to the electron@1.4.15 version : no more high CPU usage !
ThanksThat’s fantastic! I’m really happy with the results of this topic. We put our heads together and came up with a workaround that works for most people. Kudos to everyone that participated and continues to participate.
I only cooked one Pi3 during my testing. Can anyone help me to reflash a Pi3 B to a firmware version dated about January, 2017?
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I also did a downgrade from MagicMirror 2.1.1 and electron@1.7 as proposed
to MagicMirror 2.1.0 and electron@1.4.15. and see a significant lower CPU usage. Formerly CPU usage was most of the time over 100% up to 200%. Now, top shows a CPU usage of electron between 2 to 3 %.I hope that the electron dev team will take a look to fix that problem in a future release!
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@Mr.Sponti said in Electron CPU usage:
Now, top shows a CPU usage of electron between 2 to 3 %.
Yeah boy! :^)
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@loctruong96 said in Electron CPU usage:
- sudo npm install electron@1.4.15 -g
- WAIT PATIENTLY FOR ELECTRON TO LOAD IN THE BACKGROUND
- a new line appear indicate electron has finished installing
- Go to your download folder, exact Magic Mirror 2.1.0
- Go to the newly exacted forlder, open another folder named config
- Change the file name Config.js.example to Config.js inside the config folder
I keep getting the same issue as @EventHorizon but none of his fixes seem to work (sudo npm install -g electron --unsafe-perm=true) or (nom @latest -g).
I’m starting with a fresh STRETCH install, and get to step 9 (npm install && npm start) where I get the (types/node) fault.
Any ideas?
Thanks all.
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@Reotch2 Hello I think this happened because electron was not successfully installed using npm as a global variable. It happened to me too and i had to reinstall electron as a global variable which is the -g at the end is for. Can you confirm that you have successfully install electron ?
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@loctruong96 Still no luck. I ran (sudo npm install electron@1.4.15 -g) after the clean install, triple verifying that I had the (-g) on there, and no luck.
-Raspberry Pi 3
-Raspbian Stretch
-Definitely ran (sudo apt-get update)
-Full error listed below:npm ERR! 404 Not Found npm ERR! 404 npm ERR! 404 'types/node' is not in the npm registry. npm ERR! 404 You should bug the author to publish it npm ERR! 404 It was specified as a dependency of 'electron' npm ERR! 404 npm ERR! 404 Note that you can also install from a npm ERR! 404 tarball, folder, or http url, or git url. npm ERR! System Linux 4.9.41-v7+ npm ERR! command "/usr/bin/nodejs" "/usr/bin/npm" "install" npm ERR! cwd /home/pi/MagicMirror npm ERR! node -v v4.8.2 npm ERR! npm -v 1.4.21 npm ERR! code E404 npm ERR! npm ERR! Additional logging details can be found in: npm ERR! /home/pi/MagicMirror/npm-debug.log npm ERR! not ok code 0 -
@Reotch2 hmmm can you try this: npm install npm@latest -g
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@loctruong96 Yup… that did the trick. odd… seems like I’ve done the same steps 10 times, but it worked on the 11th.
I can’t seem to find electron under MagicMirror/node_modules/ to verify the version. Where else can I look?
-Rich
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@Reotch2 wow… it seems different people have different version of npm installed and you need the latest one. I will add that into the steps. Thank you for verifying. Good luck on your project!
As for electron version you can confirm by trying “npm list -g” or “npm list” depend on global variable settings of your packages. -
@Reotch2 said in Electron CPU usage:
I keep getting the same issue as @EventHorizon but none of his fixes seem to work (sudo npm install -g electron --unsafe-perm=true) or (nom @latest -g).
I’m starting with a fresh STRETCH install, and get to step 9 (npm install && npm start) where I get the (types/node) fault.
Any ideas?Personally, I had some troubles with Stretch, so I went back to Jessie, July release I believe. I’m guessing that most are using Jessie as well. Also, I think that with an installation of MM 2.1.0 you get Electron 1.4.15 by default. That combination is what we have found to work best regarding the CPU usage issue.
sudo npm install electron@1.4.15has worked for everyone. I don’t know why it wasn’t working for you. Perhaps there is something else going on there -
@loctruong96 said in Electron CPU usage:
it seems different people have different version of npm installed and you need the latest one.
With regards to this topic only, you do NOT need or want the latest version of npm.
You can also find the version of npm here MagicMirror/node_modules/electron/dist/version
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@Mykle1 Agree, i was thinking the same thing. But some users are experiencing the problem where their npm failed to run install and start which i can only think of updating it which turned out to get it to work so far. I have also indicated a note in the install guide to have people aware of it.
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@cowboysdude said in Electron CPU usage:
my bathroom mirror is a pi and it’s updated and I’m not having any of these issues…
Would you please post your results, as everyone has above, for comparison? Raspbian version, MM version, Electron version and Pi version, and your nmon results
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