PCIe bandwidth information

I have a Cuda program that uses UVM to perform tasks. I have changed the code in order to support zero-copy access, since for efficient zero-copy access to work the PCIe bandwidth must be utilised as maximum as possible

Therefore I want to measure the maximum amount of data/bandwidth achieved by my program. I am not able to find any such function in ncu and nsys , can someone point me out to some resources or a way to do the same