Generate: replace breaks by a loop condition #29662
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gante
commented
Mar 14, 2024
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| if this_peer_finished and not synced_gpus: | ||
| break | ||
| this_peer_finished = unfinished_sequences.max() == 0 |
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The previous version is also a data-dependent control flow, so this change is for torch.compile readiness :)
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FYI @zucchini-nlp (the stopping criteria solution did not preserve ZeRO stage 3 support) |
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The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update. |
amyeroberts
approved these changes
Mar 15, 2024
src/transformers/generation/utils.py
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| else: | ||
| if this_peer_finished: | ||
| return False | ||
| return True |
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Or actually, we can just do
Suggested change
| else: | |
| if this_peer_finished: | |
| return False | |
| return True | |
| return not this_peer_finished |
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This solution can return False when synced_gpus is True and this_peer_finished is True, which is not intended -- this_peer_finished has to be True in all distributed devices when synced_gpus is True 🤗
Co-authored-by: amyeroberts <[email protected]>
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What does this PR do?
Pulled from the
torch.compile(..., fullgraph=True)draft PR: #29374It replaces the
breaksthat exit the endless generation loop with an equivalent function that returnsFalsewhen it should stop generating, while preserving ZeRO stage 3 support. It is not only an improvement in terms of code reuse, but also a hard requirement to enabletorch.compile(..., fullgraph=True):breakand data-dependent control flow is not supported.