torch.cuda.memory_usage
torch.cuda.memory_usage(device=None)
Returns the percent of time over the past sample period during
   which global (device) memory was being read or written. as given by
   nvidia-smi.
Parameters:
      device (torch.device or int, optional) -- selected
      device. Returns statistic for the current device, given by
      "current_device()", if "device" is "None" (default).
Return type:
      int
Warning: Each sample period may be between 1 second and 1/6 second,
   depending on the product being queried.