Question regarding "System Load" and the "CPU temp" when MM is running.

EventHorizon · Sep 10, 2017, 1:01 PM

Hi all,

I have some small questions in regards to my Raspberry Pi 3. I have nearly finished setup and am waiting for the 2 way mirror to arrive so I’ve done some tests with the Pi 3 running Magic Mirror.

What I noticed is that the CPU temp idles around 45 then when I run the MM it seems to stay around 57 - 65 degrees C. But the system load is always around 2 - 2.7 when running the MM.

I don’t have THAT many modules running, my question is: is this normal for a Pi3 to have a system load that high and a constant temperature of around 60 when the MM is running? It’s not even in the frame or anything yet either. I am going to purchase a heatsink and fan just incase.

For a fan, I was considering this one, would this do the trick?

https://www.amazon.co.uk/GorillaPi-Black-Raspberry-Case-Model/dp/B01JUW9O64/ref=sr_1_1?ie=UTF8&qid=1505048272&sr=8-1&keywords=raspberry+pi+3+fan

Thanks for taking the time to read this!

A Former User · Sep 10, 2017, 2:01 PM

@EventHorizon system load is very difficult to understand. 0 is entire idle. Per 1 cpu, 1 is added when the cpu is running(and in some system, including even waiting). But what it means cpu running in specific time? So average is more important to understand real burden. Normally, under 4.0 in 4 cpu system is not problem to worry. And cpu load could go over sometimes. Don’t worry about it unless it overworks for a LONG time.

Heat is another problem. Maybe some good heatsink and fan could be help. In my thought, more opened case could be better to control heat.
As for me, small heatsink and mini 5v fan makes my Asus Tinker Board under 40 - 45 degree stable.

Mykle1 · Sep 10, 2017, 2:20 PM

@EventHorizon

Your problem could be related to this. It’s worth a read

https://forum.magicmirror.builders/topic/4684/electron-cpu-usage

EventHorizon · Sep 10, 2017, 4:47 PM

Thanks @Sean and @Mykle1 for your replies! I really appreciate it.

I think my problem DOES relate to what has been discussed in that thread, so I am going to try the fresh install with the lower MM version and electrum version 1.4.15. I will post my results in that thread.

A quick noob question sorry, how do I install an older specific MM version, like the one state din the other topic?

Thanks!

Mykle1 · Sep 10, 2017, 5:13 PM

@EventHorizon said in Question regarding “System Load” and the “CPU temp” when MM is running.:

A quick noob question sorry, how do I install an older specific MM version, like the one state din the other topic?

Here you’ll find the releases:
https://github.com/MichMich/MagicMirror/releases

For a fan, I was considering this one, would this do the trick?

Any fan will work. In my case, I salvaged a fan from an old Mac G5 power supply, and even though it is a 12V fan, it works nicely using 5V from the Pi’s GPIO. I also have heatsinks installed. My Pi went from 60°C to 40°C.

I look for your progress in the other topic. Good luck

EventHorizon · Sep 10, 2017, 5:24 PM

@Mykle1 thank you I shall do! Another quick question. Can I keep my config.js file I have for the newest install? I have it backed up and saved. Can I just use that for when I downgrade? It will save me having to re-add all the modules and custom compliments etc.

A Former User · Sep 10, 2017, 5:46 PM

@EventHorizon said in Question regarding “System Load” and the “CPU temp” when MM is running.:

@Mykle1 thank you I shall do! Another quick question. Can I keep my config.js file I have for the newest install? I have it backed up and saved. Can I just use that for when I downgrade? It will save me having to re-add all the modules and custom compliments etc.

Maybe available, unless none of your module has restriction of mm version.