[WIP][4/N] Refine beginner tutorial by accelerator api #3585

Job	Run time
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	14m 34s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	53m 19s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	21m 43s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	31m 45s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	22m 53s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	20m 10s
pytorch_tutorial_build_worker (7, 15, linux.4xlarge.nvidia.gpu)	21m 44s
pytorch_tutorial_build_worker (8, 15, linux.4xlarge.nvidia.gpu)	16m 12s
pytorch_tutorial_build_worker (9, 15, linux.4xlarge.nvidia.gpu)	19m 8s
pytorch_tutorial_build_worker (10, 15, linux.4xlarge.nvidia.gpu)	15m 37s
pytorch_tutorial_build_worker (11, 15, linux.4xlarge.nvidia.gpu)	18m 31s
pytorch_tutorial_build_worker (12, 15, linux.4xlarge.nvidia.gpu)	27m 31s
pytorch_tutorial_build_worker (13, 15, linux.4xlarge.nvidia.gpu)	40m 27s
pytorch_tutorial_build_worker (14, 15, linux.4xlarge.nvidia.gpu)	37m 6s
pytorch_tutorial_build_worker (15, 15, linux.4xlarge.nvidia.gpu)	28m 46s
pytorch_tutorial_build_manager	0s
	6h 29m 26s

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