Kernel Read Bandwidth - 2022.1 English

Vitis Guidance Messaging (UG1315)

Document ID
Release Date
2022.1 English


Kernel read utilization on this specific port is low.


This message is generated whenever the runtime environment considers that the utilization of a port is too low. This can be a combination of port data width and burst inference.


If the data width of a port is far less than 512 bits, consider packaging multiple values into a single transfer. The 512 bits can be efficiently packed and unpacked on the receiving side by using a separate process to read and write to the AXI interface.

These processes can also be used to infer burst reads and writes. Each of these processes should contain a loop with a simple variable incremented by one to read/write from the port and store the value internally.

Applying the DATAFLOW pragma to these processes surrounding the actual algorithm results in an efficient implementation.