Device resource isolation

A simple demonstration for device isolation: A task with the following resources.

resources:
  limits:
    nvidia.com/gpu: 1 # requesting 1 vGPU
    nvidia.com/gpumem: 3000 # Each vGPU contains 3000 MiB device memory

will see 3G device memory inside container

GPU memory hard limit demonstration showing 3G device memory inside container