Short vs Int vs Floating Point usage in Kernels

Thanks for your reply wzk6_3_8.

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Is the resource usage gotten after the "place and route"? or just the estimation?

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This is just the estimation. I'm in the process of running the full compilations to compare, however in my experience kernels with estimated usages of over 100% typically fail hardware compilation.

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the kernel only has one arithmetic operation, whose resource usage is much smaller than that of the kernel overhead. Try more arithmetic operations in the kernel. BTW, more CUs cannot help.

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But if everything else remains constant (only the type of the data changes), why would the overhead of the kernel change?