Description
Warning: [200-786] Detected
dataflow on top in function %s with default interface mode
This message
reports a possible throughput improvement.'ap_ctrl_hs'. Overlapped execution of successive
kernel calls will not happen unless interface mode is set to 'ap_ctrl_chain' (or 'ap_ctrl_none' for a purely data-driven design).Explanation
If the user code has dataflow at the top-level function, and if the user wants to execute the kernel in a pipeline mode, then it is not possible with an ap_ctrl_hs protocol. For more information on the protocol, see Defining Interfaces.
Solution
Multiple kernel executions can be overlapped for performance improvements if the user specifies the below interface pragma.
#pragma HLS INTERFACE mode= ap_ctrl_chain bundle=control