Lock thread/block computation (#73800)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/73800
Test Plan: Imported from OSS
Reviewed By: navahgar
Differential Revision: D34647281
Pulled By: eellison
fbshipit-source-id: adbdaf24191c4c1b85e0b62564388f2481002ed2
(cherry picked from commit 6cf38015cc14691518b1b5cb7d636e80eb3684fc)
