A tutorial on pin_memory and non_blocking usage #2571

Job	Run time
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	15m 52s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	52m 37s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	20m 45s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	29m 11s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	22m 0s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	18m 38s
pytorch_tutorial_build_worker (7, 15, linux.4xlarge.nvidia.gpu)	20m 55s
pytorch_tutorial_build_worker (8, 15, linux.4xlarge.nvidia.gpu)	19m 15s
pytorch_tutorial_build_worker (9, 15, linux.4xlarge.nvidia.gpu)	37m 53s
pytorch_tutorial_build_worker (10, 15, linux.4xlarge.nvidia.gpu)	42m 15s
pytorch_tutorial_build_worker (11, 15, linux.4xlarge.nvidia.gpu)	32m 45s
pytorch_tutorial_build_worker (12, 15, linux.4xlarge.nvidia.gpu)	20m 15s
pytorch_tutorial_build_worker (13, 15, linux.4xlarge.nvidia.gpu)	21m 45s
pytorch_tutorial_build_worker (14, 15, linux.4xlarge.nvidia.gpu)	14m 46s
pytorch_tutorial_build_worker (15, 15, linux.4xlarge.nvidia.gpu)	21m 56s
pytorch_tutorial_build_manager	23m 3s
	6h 53m 51s

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