Bug fixes to DDP _update_process_group API. #114194
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🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/114194
Note: Links to docs will display an error until the docs builds have been completed. ✅ No FailuresAs of commit 3d4e5d7 with merge base 4182092 ( This comment was automatically generated by Dr. CI and updates every 15 minutes. |
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@rohan-varma @fegin @fduwjj Wondering if someone can look at this PR? Thanks! |
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#113580 introduced the
DDP._update_process_groupAPI. However, the implementation did not correctly reset all of the necessary state in the reducer. In particular if an error occurred during backward, DDP would end up in an incorrect state.As a result, in this PR I've enhanced the unit test to test for this case and also appropriately fixed resetting Reducer state.
cc @mrshenli @zhaojuanmao @satgera @rohan-varma @gqchen @aazzolini @osalpekar @jiayisuse @H-Huang @kwen2501 @awgu @penguinwu @fegin @XilunWu