benchmark

d64579cc - Add channels_last for all torchbench models and enable it with run.py (#1371)

Add channels_last for all torchbench models and enable it with run.py (#1371) Summary: In order to standardize the performance evluation and increase coverage, added the `channels_last` for all torchbench models, and enable it with `run.py` entry for debug using. This PR as a first step to standardize and increase coverage for TorchBench, which works for the roadmap https://github.com/pytorch/benchmark/issues/1293. Took `alexnet` as an example, which run on CLX 8280L (28cc) ```shell python run.py alexnet -d cpu -m eager -t eval Running eval method from alexnet on cpu in eager mode with input batch size 128. CPU Total Wall Time: 108.189 milliseconds ``` ```shell python run.py alexnet -d cpu -m eager -t eval --channels-last Running eval method from alexnet on cpu in eager mode with input batch size 128. CPU Total Wall Time: 72.930 milliseconds ``` Pull Request resolved: https://github.com/pytorch/benchmark/pull/1371 Reviewed By: davidberard98 Differential Revision: D43273579 Pulled By: xuzhao9 fbshipit-source-id: 9597d996d27dd228445e3e8122e5e7131cc93669