Hardware

PDRAM: A Hybrid PRAM and DRAM Main Memory System

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Executive Summary

In this paper, the authors propose PDRAM, a novel energy efficient main memory architecture based on Phase change Random Access Memory (PRAM) and DRAM. The paper explores the challenges involved in incorporating PRAM into the main memory hierarchy of computing systems, and proposes a low overhead hybrid hardware-software solution for managing it. The experimental results indicate that the solution is able to achieve average energy savings of 30% at negligible overhead over conventional memory architectures. Power consumption is a major concern in the design of modern systems. Most of the recent research in power management has focused more on dynamic management of CPU power consumption, assuming it to be the most dominant contributor to system power consumption.

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