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questions about speed performance on Ultra96v2 #9

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@haihengcao

profiled skynet further, found that each skynet call to the pl costs 0.165ms, as such 24fps;
and the first image_stitch opeartion adds a cost, and the following ones cost are very low.
Nice design!
There still exists one timing problem:
Under 214MHz, there exists -3.014ns WNS unmet timing constrains in vivado 2019.2, in 3×3 conv modules. Is it normal or the Vivado version differences?

image
If design focus speed performance only , what other optimization could take? Does AXI bus clock alone to speed up the dram access? Appreciate if you could give some advice, thanks.

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