Energy-Aware Page Replacement for NVM-based Hybrid Main Memory System

With the advantage of low power consumption, Non-Volatile Memories (NVMs) has been widely used in hybrid memory architecture. This paper presents a page replacement method based on NVM-DRAM hybrid main memory system for low power and consistency guarantee, called EAPR The energy consumption of page access in DRAMs and NVMs can be calculated according to the memory access, and the pages are migrated according to their energy consumption, by which the pages are determined to migrate from NVM to DRAM or from DRAM to NVM. Instead of deleting the logs directly, our approach guarantees the consistency of the hybrid memory architecture by optimizing the structure of logs after the transactions of the applications are submitted. Finally, the experimental results show that EAPR can not only reduce the energy consumption at least 20% compared with other page replacement algorithms but also guarantee the consistency of transactions in the NVM-DRAM hybrid memory system.