分离Cache的一种容量联合分配算法

在嵌入式处理器中,Cache的功耗所占的比重越来越大.针对不同类型的应用程序对指令Cache和数据Cache的容量实时需求不同,提出了一种新的容量联合分配算法,该算法可以均衡考虑程序运行时对指令 Cache和数据Cache的实时需求,动态调整一级Cache的容量和配置,从而更有效地利用Cache资源.Mibench仿真结果表明,采用容量联合分配算法的分离Cache与传统分离Cache相比,平均能量消耗降低了29.10%,平均能量延迟积降低了33.38%.

A New Capacity Co-allocation Algorithm of Split Cache

Caches compose larger and larger proportion in the power consumption of embedded processors. Based on the fact that different programs need different sizes of instruction and data cache, a new capacity co-allocation algorithm was proposedr. This algorithm can dynamically adjust the configuration of level 1 cache by balancing the instruction and data cache requirement. Mibench simulation results indicate that, compared with the capacity co-allocation cache and the normal cache, the average energy consumption decreases 29.10%,while the average energy delay production improves 33.38%.