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improve(llama): Faster apply_rotary_pos_emb #22785

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fpgaminer
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What does this PR do?

Faster implementation for apply_rotary_pos_emb in modeling_llama.py.

Please see issue #22683 for code that verifies the correctness of the change.

NOTE: Not marking as fixing the above issue, as speed is still not as good as before.

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  • This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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    Pull Request section?
  • Was this discussed/approved via a Github issue or the forum? Please add a link
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  • Did you make sure to update the documentation with your changes? Here are the
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    here are tips on formatting docstrings.
  • Did you write any new necessary tests?

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Anyone in the community is free to review the PR once the tests have passed. Feel free to tag
members/contributors who may be interested in your PR.

@gante

@HuggingFaceDocBuilderDev
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HuggingFaceDocBuilderDev commented Apr 15, 2023

The documentation is not available anymore as the PR was closed or merged.

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Thanks for improving the performance @fpgaminer 🙏

@amyeroberts for context, this comment shows that a) it gets exactly the same numerical output b) it is faster than the previous version

@gante gante requested a review from amyeroberts April 17, 2023 13:39
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🔥 🔥 🔥 - thanks for updating and for the time to validate and benchmark 🙏

@neggert
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neggert commented Jul 7, 2023

Should a similar patch be applied to GPT-NeoX?

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@neggert I believe it can be added to GPT-NeoX too - very happy to review a PR if you'd like to add!

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5 participants