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…all cudaMallocAsync
kilinchange
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chen2021673
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Apr 8, 2026
| // Maximum number of dimensions supported by the broadcast metadata. | ||
| // Real-world tensors in this codebase top out at 4-5 dims, so 8 leaves comfortable headroom | ||
| // while keeping the struct under the 4 KB CUDA kernel parameter limit. | ||
| constexpr int kMaxBroadcastDims = 8; |
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确实，一般来讲8足够了。之后有超过8的场景还可以feedback到memcpy版本上
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pass broadcast strides by value to kill per-call cudaMallocAsync