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[RFC][WIP][CP] Enable FlexAttention CP for llama3 #1883

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[RFC][WIP][CP] Enable FlexAttention CP for llama3 #1883

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[RFC][WIP][CP] Enable FlexAttention CP for llama3
XilunWu Oct 15, 2025
1735bfd
Update on "[RFC][WIP][CP] Enable FlexAttention CP for llama3"
XilunWu Oct 16, 2025
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Update on "[RFC][WIP][CP] Enable FlexAttention CP for llama3" 
This PR uses the latest CP APIs to enable FlexAttention + CP for llama3.  This PR removes the usage of context_paralle() context manager and use `_context_parallel_shard()` to shard the input data.


Pull-Request: #1857

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XilunWu committed Oct 16, 2025
commit 1735bfd80e1cea45b0090f159301eaec6746d706

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