add more info back to BenchResult (#21502)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21502
In BenchResult, we keep name, avg_fwd, std_fwd, avg_bwd, and std_bwd. There is no information about the number of each iteration. In this diff, I am adding more info to BenchResult to include the number reported from each iteration.
Reviewed By: wanchaol
Differential Revision: D15706306
fbshipit-source-id: 3f14be4ba91f1f6da473995783bd7af1d067938d
