CPU (and other) temps

Tachyon
1

Since putting my tachyon in a case I've noticed it's felt quite warm - I'm sure it's well within spec but I can't seem to get to a simple high-level temperature reading in either particle-console or CLI. lm-sensors/hddtemp packages are included by default but the output of sensors only gives me battery temp/voltage/current readings.

Walking the thermal zones in /sys/class/thermal gives me 87 lines of output... amongst those I can see zones that are named things like modem-lte-sub6 and cpu-0-0-step .... any clues on useful/meaningful ones to check?

closest I can guess is

/home/particle/thermals.sh 2> /dev/null | grep -i uss
gpuss-0-step        51.0°C
gpuss-1-step        49.8°C
cpuss-0-usr         55.8°C
cpuss-1-usr         53.9°C
gpuss-0-usr         51.0°C
gpuss-1-usr         49.4°C

???

2

Hey Zedstarr,

I typically used 'sensors' to view temperature zones but it will output the same as /sys/class/thermal typically. in terms of which is important, that isn't something that is easy to document but I'll get it onto the list! The system automatically turns itself 'down' when it gets warm so the output is that CPUs will be restricted in CPU temperature and the modem throughput will be reduced all the way up to 100C operating temperature so there isn't much to worry about.

You can keep the temperature down by setting the cpu governors to change the behaviour and use hot plug to remove those cores - a lot more to that than I can write here quickly, but it all works :slight_smile:

Thanks

Nick.

3

sensors only outputs 5 zones for me - none of which are cpu/gpu, hence why I went looking in /sys/class/thermal

wireless-isa-0000
Adapter: ISA adapter
in0:              N/A  (max =  +0.00 V)
curr1:       575.00 mA (max =  +0.00 A)

usb-virtual-0
Adapter: Virtual device
temp1:        -40.0 C  

battery-virtual-0
Adapter: Virtual device
temp1:        +25.0 C  

usb-isa-0000
Adapter: ISA adapter
in0:          68.03 V  (max =  +0.00 V)
temp:         -40.0 C  
curr1:         0.00 A  (max =  +0.00 A)

battery-isa-0000
Adapter: ISA adapter
in0:           4.09 V  (max =  +4.20 V)
temp:         +25.0 C  
curr1:       -106.00 mA
4

Looking into this - we use a script that we can open source here and will circle back!