htop/top is a useful command that helps users understand how much of there CPU (Different core)/RAM are being used. We would like to see the same for GPU there are tools that provide that, but sadly unlike cpu top/htop the ones for GPU are sadly fragmented. Based on your GPU vendor we have different tools to provide us this graphical info.
Note: I am talking about tools i tested in Ubuntu/Debian Linux
For intel (iRIS)
- intel_gpu_top (from intel-gpu-tools package)
For AMD GPUs
Link to Reference: