Why logic utilization is much higher?

Question

Dear all,This is my estimated resources on Arria 10. I used Quartus v17.1. The logic utilization is much higher than ALUTs, registers, memory and DSP. Is this normal? Because the other resources are much lower. Why logic utilization is so huge?+--------------------------------------------------------------------+; Estimated Resource Usage Summary                                  ;+----------------------------------------+---------------------------+; Resource                                            + Usage                    ;+----------------------------------------+---------------------------+; Logic utilization                                   ;  84%                    ;; ALUTs                                                    ;  48%                    ;; Dedicated logic registers                   ;  39%                    ;; Memory blocks                                    ;  34%                    ;; DSP blocks                                           ;  25%                    ;+----------------------------------------+---------------------------;

tricky · Answer

Logic utilisation is a function of your code. So why were you expecting more Mem and DSP usage? have you checked the per-entity logic usage to see if entities where you expected ram are using logic instead? This will usually occur when you have code that cannot infer rams or DSP.