Energy-Aware Writes to Non-Volatile Main Memory
Scalability challenges of DRAM technology call for advances in emerging memory technologies, among which Phase Change Memory (PCM) has received considerable attention due to its non-volatility, storage density and capacity advantages. The draw-backs of PCM include limited write endurance and high power consumption for write operations (up to 10 in comparison to read operations). In this paper, the authors investigate new techniques that would perform writes to PCM with energy awareness. Their results show that they can minimize the write energy consumption by up to 8.1x by simply converting PCM native writes to read-before-write, and up to an additional 22.9% via intelligent out-of-position updates.