Cores and GPUs with Kokkos and CUDA

How does one log GPU time/ function in the log.lammps file?

I’m not sure what you mean–can you explain a little more what you are looking for? If you want an accurate timing breakdown in the logfile you will need to set the environment variable CUDA_LAUNCH_BLOCKING=1. You could use nvprof to get timings of the individual CUDA kernels.