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Add support for small page sizes#824

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skrider wants to merge 19 commits intoDao-AILab:mainDao-AILab/flash-attention:mainfrom skrider:small-pagesskrider/flash-attention:small-pagesCopy head branch name to clipboard

+195-68

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Commits on Mar 26, 2024

• add print statements for debugging

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  8efeb7f

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• add print statements for debugging

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  ac5e78a

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• reshape gmem copy

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  14b190b

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• only test trivial block size

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  409431b

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• implement kv page iteration functions

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  70dd049

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• rearrange initial offset computation

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  59e76be

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• tests passing for single page k

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  175369f

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• paged copy refactor working for page size 256

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  3691677

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• allow small page sizes in flash api

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  c05b857

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• remove print statements

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  347a625

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• tidy flash_fwd_kernel

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  3bb71a9

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• compiles for all h but 128

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  fa13c6b

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• all working except rotary embedding

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  bde5aec

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• add page size 16 to tests

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  bc66858

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• reshape rotary sin/cos copy to align with paged KV copy

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  0f5a45e

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• revert hardcoded rotcossin thread layout

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  802dd6a

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• resolve page offsets absolutely not relatively

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  135a1da

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• add test for page table overflow

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  a63157e

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• allow smaller page sizes in varlen api

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  7968148

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