pytorch

d230045f - Combine backtrace print into one string to avoid interleaving. (#56961)

Combine backtrace print into one string to avoid interleaving. (#56961) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/56961 As described in https://github.com/pytorch/pytorch/issues/56583, the backtrace amongst several processes was garbled. https://github.com/pytorch/pytorch/pull/56198 would've alleviated this to some extent, but this PR combines all the logging into just one string to reduce interleaving further. ghstack-source-id: 128730047 Test Plan: waitforbuildbot Reviewed By: cbalioglu Differential Revision: D28013191 fbshipit-source-id: 8bd8978a92ee2fbcd18472e1293d5809455b411b