For Nvidia, the CPU manual is part of the SoC Manual, downloadable at https://developer.nvidia.com/embedded/downloads#?cl=date,-1 https://developer.nvidia.com/e

For Nvidia, the CPU manual is part of the SoC Manual, downloadable at https://developer.nvidia.com/embedded/downloads#?cl=date,-1 https://developer.nvidia.com/embedded/downloads#?cl=date,-1. (search for TRM) Xavier has 8 Carmel cores and Parker/X2 has 2 Denver2 cores and 4 Cortex-A57s. The SoC manual includes instruction timings for the NV cores.