fix(autojac): Automatically fallback when vmap fails#767
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KartavyaDikshit wants to merge 2 commits into
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fix(autojac): Automatically fallback when vmap fails#767KartavyaDikshit wants to merge 2 commits into
KartavyaDikshit wants to merge 2 commits into
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KartavyaDikshit
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PierreQuinton and
ValerianRey
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July 9, 2026 17:46
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Hi, thanks for the PR. This seems like an interesting direction, until we can properly fix the core problem in torch itself. So far, CI breaks though, could you please fix the errors? |
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I'm working on a fix on PyTorch itself. If it succeeds, this workaround won't be needed. I'll update you soon if I manage to make a PR, and if they accept it. But since there are other reasons for which vmap could fail, this is still relevant even if we fix the autocast + vmap + grad combo. |
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Resolves #699
Fallback to sequential differentiation when
torch.vmapencounters limitations such as mixed precisionautocastnodes in graph ortorch.compile. Emits a helpful warning suggesting explicitly passingparallel_chunk_size=1.Signed-off-by: KartavyaDikshit kartavyaniraj.dikshit2021@vitstudent.ac.in