Buffer allocation algorithm with consideration of routing congestion

The dominating contribution of interconnect to system performance has made it critical to plan the buffers and the routes resource in the early stage of the layout. In this paper, we present a congestion estimation model which takes the buffer insertion sites into consideration. Based on the feasible region of the buffer insertion, the two-level tile structure is used to represent the distribution of the feasible buffer insertion sites among the routing tiles. And the buffer allocation method is pertormed based on the congestion estimation, which can find the buffer locations with good congestion result. Our approach can be embedded into the floorplanning process and the experimental results show the efficiency of our method.