NVIDIA / NVIDIA/cutlass

[QST]Behavior of TMA Store and Wait Mechanism in CUTLASS

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Dominant language
C++
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Description

In CUTLASS, there is a tma_store_wait function, which corresponds to cp.async.bulk.wait_group.read. Based on my observations while working with TMA, it seems that after completing a TMA-store operation, waiting is not necessary. It appears to behave like expect_tx, where the operation seems to complete automatically.

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Research direction

Start with the tma_store_wait entry point and compare its behavior with the cp.async.bulk.wait_group.read instruction described in the issue. Verify whether a completed TMA-store operation requires an explicit wait and document the observed behavior and resulting guidance.

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Assessment

Tech stack
cpp
Domain
performance
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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