ziyuhuang123

[QST]Are Tensors Equivalent After Different Layout Transformations?

1

**What is your question?** I first have an array of pointers A. Then, following layout B, I obtain a tensor T0. Similarly, I have another array of pointers B (different...

[QST]when will DelayTmaStore be important?

2

I see DelayTmaStore in the code but I do not understand when we need it. Could anyone tell me? Thanks!

[QST]Inquiry About the Computation Size in a Single cute::gemm Call in CUTLASS

1

**What is your question?** Could you please explain how large a single cute::gemm computation is in CUTLASS? Since multiple threads compute together, and it doesn’t explicitly state the number of...

[QST]Question About the Use of MMA In-Flight in SS_WarpSpecialized

1

I don’t understand why MMA in-flight is used in SS_WarpSpecialized. As shown in the diagram below, I’ve illustrated my understanding with a pipeline diagram. If there is MMA in-flight, then...

[QST]Why Does CUTLASS Handle the First K Dimension Separately in Matrix Multiplication?

1

Could you please explain why CUTLASS separates the first iteration of the K dimension in matrix multiplication? Does this really improve performance?

[QST]Why Does CUTLASS Use 3-4-3 Swizzle?

3

May I kindly ask why the swizzle configuration in CUTLASS is specifically set to 3, 4, and 3? I would greatly appreciate any insights or explanations regarding the rationale behind...

[QST]How Does TMA Work in CUTLASS for Writing from Shared Memory to Global Memory?

1

Could you explain how TMA works in CUTLASS? For example, when writing from the shared memory Tensor sS to the global memory Tensor gD, it seems that the data is...

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

1

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...

[QST]Is the Key Difference Between mbarrier and barrier Their Handling of Producer-Consumer Count?

1

Barrier is used for scenarios where the number of producers and consumers is the same, while mbarrier is used when the numbers differ. Is this conclusion correct? Is this the...

[QST]How to Handle Synchronization with Different Thread Counts for Producer and Consumer in CUTLASS?

1

In scenarios where both producer and consumer threads exist, how can we achieve synchronization using CUTLASS's barrier.sync/arrive? I understand that in barrier.arrive(a, b), a represents the number of threads required...