Register reallocation for soft error reduction

Subsequently to the problem of performance and energy overhead, the reliability problem of the system caused by soft error has become a growing concern. Since register file (RF) is the hottest component in processor, if not well protected, soft errors occurring in it will do harm to the system reliability greatly. In order to reduce soft error occurrence rate of register file, this paper presents a method to reallocate the register based on the fact that different live variables have different contribution to the register file vulnerability (RFV). Our experimental results on benchmarks from MiBench suite indicate that our method can significantly enhance the reliability.