support to print gpu

[liufengwei0103]

support to print gpu

[github-actions]

Speed stats:

GPU Name: GeForce GTX 1080 

PyTorch resnet50 time: 140.9ms (= 7044.8ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 128.4ms (= 6418.0ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
Relative speed: 1.10 (= 140.9ms / 128.4ms)

PyTorch resnet50 time: 84.5ms (= 4225.7ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 74.5ms (= 3727.1ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
Relative speed: 1.13 (= 84.5ms / 74.5ms)

PyTorch resnet50 time: 56.5ms (= 2827.2ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 47.2ms (= 2361.6ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
Relative speed: 1.20 (= 56.5ms / 47.2ms)

PyTorch resnet50 time: 47.4ms (= 2371.2ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 38.8ms (= 1938.4ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
Relative speed: 1.22 (= 47.4ms / 38.8ms)

PyTorch resnet50 time: 41.4ms (= 2071.6ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
OneFlow resnet50 time: 36.5ms (= 1824.0ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
Relative speed: 1.14 (= 41.4ms / 36.5ms)