The bandwidth analysis for this design is straightforward. You satisfy the input bandwidth with a single programmable logic input/output (PLIO). The output histogram size per tile is small, and you set no output bandwidth or latency target. The computed frame duration is 235 μs assuming the given image size and 220 MP/s target throughput. A single output PLIO stream transfers the full histogram result in 1 μs, less than 1% of the image frame. This transfer rate is reasonable.