Add independent K scale support in FP8 prefill attention#40
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xueyangcs wants to merge 1 commit intoTencent:mainfrom
Open
Add independent K scale support in FP8 prefill attention#40xueyangcs wants to merge 1 commit intoTencent:mainfrom
xueyangcs wants to merge 1 commit intoTencent:mainfrom
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Summary
Split the combined qkscale parameter into separate qscale and kscale in the FP8 prefill attention kernel, allowing Q and K to use different quantization granularities.
Breaking Change:
qkscale: [num_batch, num_head_q, max_seqlens_q_pad], float32is replaced by:qscale: [num_batch, num_head_q, max_seqlens_q_pad], float32andkscale: [1], float32