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2. Add channels 2 code backup for ep128 support.
Signed-off-by: lijian6 <lijian6@sugon.com>

Signed-off-by: lishen <lishen@sugon.com>

Signed-off-by: lijian <lijian6@sugon.com>

Signed-off-by: lijian <lijian6@sugon.com>

Signed-off-by: lijian <lijian6@sugon.com>

2. Fix rocshmem internode hang on 508.
Signed-off-by: lijian <lijian6@sugon.com>

2. Add internode ll mode.
3. Add test internode ll mode.
Signed-off-by: lijian <lijian6@sugon.com>

Signed-off-by: lijian <lijian6@sugon.com>

     backup pass way.
Signed-off-by: lishen <lishen@sugon.com>

Signed-off-by: lijian <lijian6@sugon.com>

Signed-off-by: lijian <lijian6@sugon.com>

Signed-off-by: lijian <lijian6@sugon.com>

Co-authored-by: Yifei Zhang <219273404+yifeizhang-c@users.noreply.github.com>

* Fix hidden_size % 128 != 0

* Add `align_down()` function

* Use the full warp to wait TMA store

* Support arbitrary hidden sizes in fp8 cast

* lint

* Remove redundant TMA flushes

* Less barrier initialization overhead

* Simplify `elect_one_sync`

* Use `elect_one_sync` instead of lanes

* Minor fix

* Polish testing prints

* Refactor for internode kernels

* Better performance