Does DDPPO example code uses GPU?

I’m trying to use tuned-example DDPPO.

This configuration uses “num_gpus_per_worekr” = 1, so I think it would use gpu.
However, it doesn’t uses gpu when I check it with nvidia-smi.
Is there any way to make ddppo use the gpu?

My experiment setups are followings.

  • ubuntu 18.04,
  • python 3.7
  • ray 1.5.1
  • GPU: A100