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change condition to num_heads >= num_heads_k #1030

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change condition to num_heads >= num_heads_k #1030

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Luke20000429
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Issue #1029

@Luke20000429
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Luke20000429 commented Jul 14, 2024 •
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Anyone take a look? This will significantly affect performance.
Profiling with Nsight:
Total time split_forward + combine = 24 us
Screenshot 2024-07-05 at 2 32 10 PM
The original code won't trigger split_kv. No split = 77 us
Screenshot 2024-07-05 at 2 33 53 PM
Significant speedup on small batch size.

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