Effective page replacement algorithm of hybride memory

Abstract

The main objective of this paper is to implement high-performance next-generation main memory by proposing an effective page replacement algorithm for the hybrid structure of DRAM and PCM. To replace conventional DRAM, a DRAM&PCM hybrid memory is one of the effective structures because it can utilize an advantage of DRAM and PCM. However, in order to use the characteristics of DRAM and PCM, pages should be replaced frequently. This is still a major problem in PCM that have write-limits. Therefore, it needs an effective page management method for exploiting each memory characteristics dynamically and adaptively. To reduce frequent page replacement, page replacement in the proposed hybrid memory is handled by two localities in PCM and recent write requests in DRAM. According to our simulation, the proposed algorithm for the DRAM&PCM hybrid can reduce the PCM write count by around 22% and the average access time by 31% given the same PCM size, compared with Clock-DWF algorithm. ? 2005 - Ongoing JATIT & LLS.