High CPU load

martisak · February 19, 2017, 3:41pm

Hello!

I have noticed that CPU load becomes very high on my Raspberry Pi 3 after a while on 0.38.3. It is normally very low, but jumps to ~30% (95-105% in top). It never goes back - in the plot that is when I restarted hass. The web interface is still responsive, but I can’t turn on or off any devices.

I have tried to do a downgrade to 0.30.1, but no difference. I have installed hass in a virtual environment.
Also, I have moved to a mysql-database which speeds things up, but didn’t make a difference on the high load.

Another thing that I did was to install OpenCV and motion. Motion runs separately - the question below lists ffmpeg, but I have not used any camera in my configuration.

High CPU Usage on 0.30.2
High CPU load due to ffmpeg in HASS 0.32.1

Appreciate any help in troubleshooting this. Thanks!

Tinkerer · February 19, 2017, 4:24pm

If you SSH to the Pi and run top, what’s using the CPU?

martisak · February 19, 2017, 4:35pm

hass is using 95-105 % of the CPU. The question is, what inside hass is using that much… I am trying to disable modules now to see if this helps.

Tinkerer · February 19, 2017, 4:36pm

If you get stuck, posting your (correctly formatted) config here will likely help others narrow things down.

rmeijs · February 26, 2017, 12:20pm

Hi @martisak, I ran into a very similar situation. By stripping my config I found that the emulated_hue component is causing the high CPU load on my RPi. Did you find something similar?

itom · February 26, 2017, 2:42pm

Same here with HASS 39.0 on Ubuntu 16.04.
Is this a bug in emulated HUE or is there an explanation for the permanent high load?

resoai · February 26, 2017, 6:17pm

I am experiencing the very same issue on Ubuntu 16.04. I’ve noticed that netdisco lib has been updated, perhaps this is could be causing the problem?

martisak · February 26, 2017, 8:16pm

So far so good. Upgraded to 0.39.0 today.

I believe the noise is because I reactivated some modules. I have kept updater, discovery and device_tracker disabled for now. The updates seem to come more often as well.

How did you isolate the high load to the emulated_hue component?

resoai · February 26, 2017, 11:02pm

I was going through each component one by one and noticed that disabling discovery did bring the load down, however disabling emulated_hue appears to have fixed it.

dannew · March 1, 2017, 8:31pm

Interesting, disabling discovery fixed it for me, disabling emulated_hue did nothing.

rmeijs · March 2, 2017, 6:58pm

For me the high CPU load is fixed in 39.2 (probably because: Fix discovery taking up all memory and cpu). @martisak: How is your situation now?

martisak · March 2, 2017, 8:39pm

Still stable, discovery is disabled but so is also asuswrt device tracker.

resoai · March 3, 2017, 5:50pm

I can confirm that everything has been fixed in 39.2 (netdisco was indeed causing problems)

mr_white · February 12, 2019, 4:08pm

hallo!

sorry for reopen this thread.

just want to know what your average cpu load is guys.

on my raspberry 3 hass 0.86 i have 30-50%.

i have no exclusions in recorder. maybe the reason for the high load.

thx in advance