20. The non-transitory computer-accessible memory medium of claim 1 , wherein the specifications or constraints further comprise: input count (IC), comprising a number of tokens consumed at an input terminal of the at least one functional block by one firing of the at least one functional block; output count (OC), comprising a number of tokens produced at an output terminal of the at least one functional block by one firing of the at least one functional block; and execution time (ET), comprising a number of cycles needed by the at least one functional block to complete firing.
24. The non-transitory computer-accessible memory medium of claim 20 , wherein the at least one functional block has multiple possible configurations of IC, OC, ET, II, IP, and OP, and wherein the program instructions are further executable to determine a configuration from the possible configurations based on the specifications or constraints of the at least one functional block, of another functional block, or of the graphical program.