I have a module that is using the i.Mx6 processor. If I run the processor at my desk with a app that uses 25% cpu (used Top app to get this number) and check the temperature of the case it is 44C (temperature varies across the lid). The internal temperature is around 60C (cat /sys/class/thermal/thermal_zone0/temp ).
So if I had the junction the Case number I could figure out roughly how many watts my processor is using at a 25% load. Also is there any linux app that will show me GPU load?