Reducing signal timing variations in inter-core busses

This work presents the semi-random net reordering (SRNR) technique for averaging inductive coupling in inter-core busses. The technique works by redistributing the inductive coupling from near neighbors to far neighbors through repeated semi-random net order changes at every bus turn. By utilizing the vias and layer changes that exist at the bus turn, the technique requires no additional resources. As a result, SRNR is able to significantly reduce transition speed and propagation delay variations caused by the variation in inductive coupling within the bus.