An improvement algorithm to runahead execution
Defeng Liu · 2010
Runahead execution can significantly improve the memory-level parallelism, and processor needn't be modified a lot. But Runahead execution processor excute more instructions than traditional processor, even triple the number of instructions of the common execution, So it severely increases processors' power waste. After analyzing, we find there are many useless instructions executed when Runahead processor is in runahead's execting stage, We present a new algorithm to reduce the useless instructions. The results of the Experimention show that this improvement algorithm mostly can reduce 50% useless instructions in runahead execution processor's pre-excute stage, and basically don't affect the performance a lot.