benchmark

5a152887 - Add amp+train support and channels_last support to timm models (#900)

Add amp+train support and channels_last support to timm models (#900) Summary: This PR adds amp precision support to timm train tests. It also adds channels-last option to both train and eval tests. Pull Request resolved: https://github.com/pytorch/benchmark/pull/900 Test Plan: ``` $ python run.py timm_nfnet -t train -d cuda --precision amp Running train method from timm_nfnet on cuda in eager mode. GPU Time: 256.267 milliseconds CPU Total Wall Time: 256.305 milliseconds ``` ``` $ python run.py timm_nfnet -t train -d cuda --precision amp --channels-last Running train method from timm_nfnet on cuda in eager mode. GPU Time: 234.359 milliseconds CPU Total Wall Time: 234.450 milliseconds ``` Reviewed By: erichan1 Differential Revision: D36380817 Pulled By: xuzhao9 fbshipit-source-id: c3ab231a7fde7211e484de72e24059b64b5fd3c4