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* change API for hierarchical CP
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* move fp8 code before qkv reshape
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* try to insert A2A for hierarchical CP
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* make fwd work
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* remove a redundant sync
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* make bwd of hierarchical CP work
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* fix dout a2a in bwd
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* fix q_f16 with fp8
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* assert hierarchical CP implementation does not support THD format
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* bug fix
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* assert hierarchical CP does not support attn bias
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* add unit test for hierarchical CP
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* fix cp_comm_type in unit test
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* bug fix and code cleaning
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* minor change
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* an assert info change
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* dout shape fix
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci



* move function definitions to the front of the first call
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* fix tensor view comments
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* refine CP unit test
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci



* typo fix
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* typo fix
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* save cp_size_a2a and rank_a2a in fwd
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

* add more explainations of cp_group in doc_string
Signed-off-by: Xiaowei Ren <xren@nvidia.com>

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Signed-off-by: Xiaowei Ren <xren@nvidia.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>