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[JAX] Remove unused TE DPA module dtype which fixes cuDNN backend detection to properly use input dtypes (#2485)

* Remove unused TE DPA module dtype which fixes cuDNN backend detection to properly use input dtypes
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* Warning fallback
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* adjust test tolerances slightly for encoder tests due to change in backend
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* Handle meshs set with jax.set_mesh
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* Tutorial for integration te/jax quantization into an existing framework
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* add todos
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* support nvfp4 sr rng key, move wrapper module into TE itself, fix bfloat16 cast
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* update docstrings
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* Fix QKV proj and out proj in Flax example transformer layer
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* Use fused attention in quickstart_jax example
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* remat policy
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* add tutorial to docs
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* update title
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* remove unused dtype from TE DPA module
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* Fix notebook title
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* Fix lint
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* Add explanation of flax module wrapper
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* Unset NVTE_FUSED_RING_ATTENTION_USE_SCAN by default
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* Add TODO
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* Change the warning check in P2P helper to warn against using scan loop
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* Make softmax_type in FFI optional
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* branch off of initial permutation jax-triton PR
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* Change implemementation of VJP functions to match correct pattern. Deduce some static scalar args from shapes of inputs. Accept B, S instead of num_tokens. Change test to use value_and_grad to test vjp funcs properly
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* fix test_permutation to use value_and_grad for reference impl, tighten tols, and add unpermute with probs for token combine bwd rule
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* added forgotten file in prev commit
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* format
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* merge with_probs to without_probs
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* Add generic stripe_height support for load balancing
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* Modify test code for CP + AG + THD + stripe height greater than 1
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* Add support for calculating q and kv seqlens and offsets per rank for CP+THD+AG+SW+Striped>1 primitive
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* Augment jax primitive register code comments
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* Fix the array sizes and padding values returned for seqlens and offsets to fit what the fused attn primitive non cp computation
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* Add support in new primitive for softmax_offset related changes. Put in missing primitive registering line in again. Increase the seqoffsets arrays lengths by 1
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* Add backward primitive for CP+THD+AG+Striped>1
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* Code clean up: remove older version for calculating seqlens and offsets for CP+AG+THD+striped>1 primitive
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* Add SWA tests for AG+Striped>1+CP+THD+SWA
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* Restoring test code
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* Parametrize num_segments_per_seq in tests
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* Clean up test code
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Clean up test code in TE common
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* Rename stripe_height to stripe_size
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* Code clean up and add additional comments
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nit: Apply suggestions from code review
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* Fix seqoffsets length to be passed onto FusedAttn primitive as it is b and not b+1 needed by cuDNN
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* Skip THD test cases for CP + AG + Dual chunk. Skip BSHD cases for CP + AG + Striped>1. Correct the layout and shapr parameters passed to the tests
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* nit: Correct the ID for the test dist fused attn tests to account for cp*2 which is done under the hood
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