一种新型共享Cache动态划分机制

Novel Shared Cache Dynamic Partition Mechanism

综合效用最优划分共享Cache方法和传统LRU方法的优点,提出一种新的动态划分共享Cache方法。该方法可消除不同线程在共享Cache中的相互影响,当多核并行执行的程序均对共享Cache中占有的路数敏感时,可解决采用效用最优划分方法时的性能下降问题。经SPEC CPU2000测试表明,该方法与传统LRU和效用最优划分方法相比,系统整体性能平均分别提高20.28%和14.37%。

By full using advantages of Utility-based Cache Partition（UCP） and Least-recently Used（LRU） policy,a new dynamic shared cache partitioning mechanism is presented.The proposed mechanism is called Improved Utility-based And least-recently used Cache Partition（IUL-CP）.It reduces the pollution of multi-threads in the shared cache and resolves the low performance when all cores running the shared cache way number sensitive workloads in multi-core systems with the UCP mechanism.The evaluation,by running SPEC CPU2000 benchmarks,shows that IUL-CP improves the performance by 20.28% over LRU and 14.37% over UCP on average.