pytorch

fa412758 - [Pytorch] Weaker memory ordering for c10::intrusive_ptr (#48221)

[Pytorch] Weaker memory ordering for c10::intrusive_ptr (#48221) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/48221 load-acquire, acquire-release increment and decrement. (We need acquire-release increment to make unique() and use_count() reliable.) Note that this doesn't make a difference on x86, but we should expect it to improve things on ARM and ARM64. ghstack-source-id: 117065956 Test Plan: Careful review :) Reviewed By: ezyang Differential Revision: D24708209 fbshipit-source-id: 5e574115eee5c0a65047b638c5f9b1ec0124d04d