Memos: A full hierarchy hybrid memory management framework

In this paper, we introduce memos, which integrates suitable memory management policies and schedules resources over the entire memory hierarchy in hybrid memory system. Powered by an OS kernel level monitoring tool, memos captures memory patterns online, and then leverages them to guide the memory page placement and data mapping. Experimental results show, on average, memos can benefit memory utilization, contributing to system throughput and QoS by 19.1% and 23.6%. Moreover, memos can reduce the NVM side memory latency by 3~83.3%, energy consumption by 25.1~99%, and benefit the NVM lifetime significantly (40× improvement on average).