Fix eagle on AMD #7051
Fix eagle on AMD #7051
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Summary of Changes
Hello @merrymercy, 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 aims to resolve a specific bug affecting the 'eagle' speculative decoding functionality when deployed on AMD systems. The change involves a small but crucial adjustment in the utility code to ensure proper variable initialization, which likely addresses a difference in behavior or state handling on AMD compared to other architectures.
Highlights
- Bug Fix: Addressed an issue potentially causing errors or incorrect behavior for the 'eagle' feature specifically when running on AMD hardware.
- Code Robustness: Improved the robustness of the
generate_attn_arg_prefillfunction by ensuring a critical variable (paged_kernel_lens_sum) is explicitly calculated if it's not provided, preventing potentialNonerelated issues.
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Code Review
This pull request introduces a modification in EagleDraftInput.generate_attn_arg_prefill to handle cases where paged_kernel_lens_sum might be None. This is presented as a fix for "eagle on AMD". The core change involves calculating paged_kernel_lens_sum using cum_kv_seq_len[-1] if it's initially None. This fallback calculation appears to be logically sound.
To enhance the clarity and maintainability of this change, I recommend the following:
- Update Type Hint: Consider updating the type hint for the
paged_kernel_lens_sumparameter in thegenerate_attn_arg_prefillmethod signature frominttoOptional[int]. This would accurately reflect thatNoneis a permissible and handled value. - Elaborate in PR Description: Please add a description to this pull request. Explaining the circumstances under which
paged_kernel_lens_sumcould beNone, particularly in the context of AMD platforms, would provide valuable insight for current and future reviewers and maintainers.
Overall, the change is specific and seems to address a robustness issue effectively.
No description provided.