extend C++ DTensor fast path to local operator dispatch#166808
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swolchok wants to merge 13 commits intogh/swolchok/865/basefrom
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extend C++ DTensor fast path to local operator dispatch#166808swolchok wants to merge 13 commits intogh/swolchok/865/basefrom
swolchok wants to merge 13 commits intogh/swolchok/865/basefrom
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This was referenced Nov 1, 2025
🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/166808
Note: Links to docs will display an error until the docs builds have been completed. ✅ You can merge normally! (1 Unrelated Failure)As of commit b936c51 with merge base 780e325 ( UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:
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DTensor dispatch fast path: C++ unwrap_to_op_info, OpSchema creation, & cached sharding prop
#166371
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… path to local operator dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
…ispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
…dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
… local operator dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
…path to local operator dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
swolchok
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Nov 10, 2025
…DTensor fast path: port return_and_correct_aliasing and inplace/out checks" This seems to generate a several-microsecond performance improvement in the detach benchmark I've been using. cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
swolchok
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Nov 10, 2025
…extend C++ fast path to local operator dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
swolchok
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Nov 10, 2025
…h: port return_and_correct_aliasing and inplace/out checks" This seems to generate a several-microsecond performance improvement in the detach benchmark I've been using. cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
…t arguments for local dispatch, and failure to return a list (was pushing multiple retvals onto stack) for list returning ops on "WIP: extend C++ fast path to local operator dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
swolchok
added a commit
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Nov 11, 2025
…ptionalTensorList arguments for local dispatch, and failure to return a list (was pushing multiple retvals onto stack) for list returning ops on "WIP: extend C++ fast path to local operator dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
swolchok
added a commit
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Nov 11, 2025
…ptionalTensorList arguments for local dispatch, and failure to return a list (was pushing multiple retvals onto stack) for list returning ops on "WIP: DTensor fast path: port return_and_correct_aliasing and inplace/out checks" This seems to generate a several-microsecond performance improvement in the detach benchmark I've been using. cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
swolchok
added a commit
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Nov 11, 2025
…t arguments for local dispatch, and failure to return a list (was pushing multiple retvals onto stack) for list returning ops on "WIP: DTensor fast path: port return_and_correct_aliasing and inplace/out checks" This seems to generate a several-microsecond performance improvement in the detach benchmark I've been using. cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
swolchok
changed the title
…o local operator dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
… local operator dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
ezyang
approved these changes
Nov 12, 2025
…comments on "extend C++ DTensor fast path to local operator dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
…ensor on "extend C++ DTensor fast path to local operator dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
…ast path to local operator dispatch" cc H-Huang awgu wanchaol fegin fduwjj wz337 wconstab d4l3k pragupta msaroufim dcci [ghstack-poisoned]
Collaborator
|
Starting merge as part of PR stack under #167475 |
Khanaksahu
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Nov 17, 2025
ghstack-source-id: 8f435e1 Pull Request resolved: pytorch/pytorch#166808
Silv3S
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Nov 18, 2025
Pull Request resolved: pytorch#166808 Approved by: https://github.com/ezyang ghstack dependencies: pytorch#167051, pytorch#166372
Silv3S
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Nov 18, 2025
…hecks (pytorch#167475) This seems to generate a several-microsecond performance improvement in the detach benchmark I've been using. Pull Request resolved: pytorch#167475 Approved by: https://github.com/ezyang ghstack dependencies: pytorch#167051, pytorch#166372, pytorch#166808
pytorchmergebot
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Nov 21, 2025
``` git revert --no-commit 567dcdb 200156e 3d801a4 2034ca9 480b4ff f570e58 ``` And Revert "[DTensor] Document fast-path dispatch (#168192)" And Revert "[DTensor] Fix deadlock after fast cache clear (#168069)" Reverts: * #167860 * #167588 * #167475 * #166808 * #166372 * #168192 * #168069 Signed-off-by: Edward Z. Yang <ezyang@meta.com> Pull Request resolved: #168264 Approved by: https://github.com/seemethere, https://github.com/malfet
JacobSzwejbka
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Dec 8, 2025
``` git revert --no-commit 567dcdb 200156e 3d801a4 2034ca9 480b4ff f570e58 ``` And Revert "[DTensor] Document fast-path dispatch (#168192)" And Revert "[DTensor] Fix deadlock after fast cache clear (#168069)" Reverts: * #167860 * #167588 * #167475 * #166808 * #166372 * #168192 * #168069 Signed-off-by: Edward Z. Yang <ezyang@meta.com> Pull Request resolved: #168264 Approved by: https://github.com/seemethere, https://github.com/malfet
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Stack from ghstack (oldest at bottom):
DTensor.__torch_dispatch__#167051cc @H-Huang @awgu @wanchaol @fegin @fduwjj @wz337 @wconstab @d4l3k @pragupta @msaroufim @dcci