Raise error when topk>1 and page>1 for paged attention backends.
#9784
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Summary of Changes
Hello @hnyls2002, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
This pull request introduces a crucial validation step to the server argument parsing logic. It aims to prevent potential instability and incorrect results in paged attention backends by disallowing specific combinations of speculative_eagle_topk and page_size parameters. By raising an immediate ValueError for unsupported configurations, the change ensures that the system operates within stable and correct parameters, improving overall reliability.
Highlights
- Input Validation: Added a new validation check in
server_args.pyto prevent unstable or incorrect behavior. This check specifically targets configurations wherespeculative_eagle_topkis greater than 1 andpage_sizeis greater than 1, for attention backends other than "flashinfer".
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Code Review
This pull request adds a validation check to ServerArgs to prevent running with an unstable configuration for speculative decoding. Specifically, it raises a ValueError if speculative_eagle_topk > 1 is used with page_size > 1 for any paged attention backend other than flashinfer. This is a good preventative measure. My feedback focuses on improving the clarity of the error message for a better user experience.
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
…gl-project#9784) Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
related to #7725