pytorch

af2beaf6 - [profiler] Fix time discrepancy between legacy and kineto events (#55226)

[profiler] Fix time discrepancy between legacy and kineto events (#55226) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/55226 Fixes a bug caused by using different clocks in legacy events, also fixes two small issues with not using relative time in memory events and discrepancy between start and stop profile events CUDA-wise Test Plan: CI Reviewed By: xuzhao9 Differential Revision: D27534920 fbshipit-source-id: 7a877367b3031660516c9c4fdda1bf47e77bcb3e