Energy consumption for GPU does not seem to be in microJoules?

[johannabar]

Hi, thanks for building this library!

I see in the docs and from the issue #6 that the energy consumption is supposed to be in uJ (1e-6J), but this doesn't seem to match for the GPU output. It seems that I am getting the output in mJ (1e-3J) instead.

With an NVidia Titan RTX machine that consumes 16Watt when idle and 280Watt when fully active, we should use for 60seconds respectively 16*60=960 Joules (idle) and 280*60=16,800 Joules (active). But PyJoules is measuring 952,494 uJ = 0.95 Joules (idle) and 16,522,288 uJ = 16.52 Joules (active).

Could you confirm the metrics used for nvidia_gpu outputs?

Thanks in advance, Johanna