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Add env to chose blocklen of blockwise quantize.
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Same intention of commit 3e38a2ea

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* add unittest for distributed interface apply Dener's suggestion
Signed-off-by: Hongbin Liu <hongbinl@nvidia.com>

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* minor fix
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* Update transformer_engine/pytorch/module/linear.py
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* remove comments
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Signed-off-by: Hongbin Liu <hongbinl@nvidia.com>
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---------
Signed-off-by: XiaobingSuper <xiaobingzhangupc@gmail.com>
Signed-off-by: lit <lit@nvidia.com>
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
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