Fast Persistent Heap Based on Non-Volatile Memory

Abstract

SUMMARYNew volatile memory (e.g. Phase Change Memroy) presents fast access, large capacity, byte-addressable, and non-volatility features. These features will bring impacts on the design of current software system. It has become a hot research topic of how to manage it and provide what kind of interface for upper application to use it. This paper proposes FP-Heap. FP-Heap supports direct access to non-volatile memory through a persistent heap interface. With FP-Heap, traditional persistent object systems can benefit directly from the byte-persistency of non-volatile memory. FP-Heap extends current virtual memory manager (VMM) to manage non-volatile memory and maintain a persistent mapping relationship. Also, FP-Heap offers a lightweight transaction mechanism to support atomic update of persistent data, a simple namespace to facilitate data indexing, and a basic access control mechanism to support data sharing. Compared with previous work Mnemosyne, FP-Heap achieves higher performance by its customized VMM and optimized transaction mechanism. key words: non-volatile memory, virtual memory manager, direct access

Near-threshold SIDO DC-DC converter with a high-precision ZCD for phase change memory chip

“…With the development of CMOS technology, CMOS device size shrinks and memory devices have reached their size limitation, such as DRAM, SRAM and Flash [1,2,3]. Therefore, scientists from academia and industry devote their energies to research new memory material in recent years, such as STT_MRAM [4,5], FeRAM [6,7], RRAM [8,9] and PCRAM [10].…”