GPU power consumption measurement

Is it possible to measure the power consumption of GPU in Jetson TK1?
I find out that ./tegrastats doesn’t provide the power consumption.
Moreover, the nvidia-smi seems unable to use in Jetson.

Any other way to measure?

That needs hardware rework, e.g., to add a 0.01 ohm in series on VDD_GPU_AP net to record its V & I to calculate power consumption.