System Level Comparative Performance Analysis of H.264 Encoder by Network-on-Chip Topologies

This paper describes comparative analysis results of system performance by network-on-chip topologies on system level. Network-on-chip systems are implemented by typical topologies, mesh topology, crossbar topology, folded torus topology and point-to-point topology on system level. Running the x264/AVC encoding application on each system and analyze performance from simulation results. We can find the fact that performance differences exist when running the benchmark application, by network-on-chip topologies in advance. On each implemented system, there are performance differences ranged from -5.45% to +4.75% based on mesh topology. For analyzing the effect of topologies, we use the CPUs total cycles, which reflect communication latency. Types of topologies affect the number of routers on the paths related to latency and performance. More components of onchip network reinforce such trends. We analyze the reason why each topology has different result. Used approach helps to find optimal topology by changing various on-chip-network topologies on system level