[QST] What is the difference between make_shape and make_tile? about cutlass

[hwu36]

@thakkarV

[thakkarV]

A tile is a tuple of layouts. If you divide with a shape, that is equivalent to dividing with a tile of trivial layouts (layouts who have the same shape, and left major compact strides). This is what make_tile() does if the inputs to it are just integers or shapes, it promotes them to trivial layouts by mode. Therefore, In your case, make_tile() is identical to using make shape.

As for make_shape(1, VPT) being slower than make_shape(Int<1>{}, Int<VPT>{}), yes, if you use dynamic integer types there, it can lead to inefficient code generation than using integral constants.

[mnicely]

@ZhangZhiPku have you resolved your issue?