yzh119 commented on code in PR #15333:
URL: https://github.com/apache/tvm/pull/15333#discussion_r1264760827
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python/tvm/dlight/gpu/matmul.py:
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@@ -328,7 +328,7 @@ def is_spatial(block: BlockRV) -> bool:
by, vy, ty, yi = sch.split(y, [None, vthread_y, block_size_y,
micro_size_y])
ko, ki = sch.split(k, factors=[None, micro_size_k])
sch.reorder(bx, by, vy, vx, ty, tx, ko, ki, yi, xi)
- sch.bind(batch, "blockIdx.z")
+ bx = sch.fuse(batch, bx)
Review Comment:
I suppose fusing `batch` with `by` will more faithfully inherit the
semantics of `sch.bind(batch, "blockIdx.z")` because the physical id is
`blockIdx.z * (gridDim.x * gridDim.y) + blockIdx.y * (gridDim.x) + blockIdx.x`.
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