benchmark

4bf35cf7 - Fix a env check bug for ondemand ci (#770)

Fix a env check bug for ondemand ci (#770) Summary: In OnDemand CI, the script may load `torchbenchmark` module without pytorch installed (at the first time of running the bisection script). This PR fixes a bug when it fails because `torch` package is not found. Pull Request resolved: https://github.com/pytorch/benchmark/pull/770 Reviewed By: erichan1 Differential Revision: D34481528 Pulled By: xuzhao9 fbshipit-source-id: 53068747565b33e3d7c4615aa8ad0b3562e0c46d