Adaptive replacement policy for hybrid cache architecture

Abstract

Researchers have proposed several schemes with hybrid cache architecture (HCA) which contains both SRAM cells and non-volatile memory (NVM) cells to overcome the drawbacks of NVM. The existing HCA schemes try to place a write intensive block into an SRAM way when a cache miss occurs. The cache replacement policy increases the write counts of NVM when the number of write intensive blocks are small. To solve this problem, we propose an adaptive replacement policy for hybrid cache architecture to adjust the cache replacement policy based on the write intensity for victim selection. The simulation results show that the proposed mechanism reduces the write counts of NVM by 21.2% on average compared that conventional replacement policy is used.