Construction of translation units deeply affects the performance of binary translation systems.In this paper we propose a novel adaptive translation unit construction (ATUC) algorithm.With hardware support

ATUC monitors the execution of the source architecture programs and dynamically adjusts the translation units according to the execution behavior characteristics of the programs.A hardware buffer is introduced to assist the binary translation software to detect continuously committed addresses.ATUC improves the efficiency of the translated code while guaranteeing the high success execution ratio of the translated code segments.Simulation results of the SPECint2000 benchmark show that ATUC has up to 31% performance advantages over other translation unit construction methods.