message: [ModelTiming] resnet152_ddp_training script now obtains the master address from the Slurm environment
diff: @@ -12,7 +12,11 @@ import time
  def setup(rank, world_size):
  - os.environ['MASTER_ADDR'] = 'localhost'
  + try:
  + root_node = os.environ['SLURM_NODELIST'].split(' ')[0]
  + except Exception as e:
  + root_node = 'localhost'
  + os.environ['MASTER_ADDR'] = root_node
  os.environ['MASTER_PORT'] = '12355'
  dist.init_process_group("nccl", rank=rank, world_size=world_size)
  