Current measurement after power rail

Is there any method to estimate current of CPU or GPU after power rail? Tegrastats gives information before power rail but I need after power rail, exact value flowing into CPU and GPU.

There is power monitor appnote of TX1/TX2 can be as reference. There is power monitor in module to monitor the VDD_CPU and VDD_GPU. https://developer.nvidia.com/embedded/dlc/jetson-tx1-tx2-voltage-current-config