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ISTC-CC Abstract
Evaluating STT-RAM as an Energy-Efficient Main Memory Alternative
IEEE International Symposium on Performance Analysis of Systems and Software (ISPASS'13), April 2013.
Emre Kultursay, Mahmut Kandemir, Anand Sivasubramaniam, Onur Mutlu*
The Pennsylvania State University
*
Carnegie Mellon University
In this paper, we explore the possibility of using STT-RAM technology to completely replace DRAM in main memory. Our goal is to make STT-RAM performance comparable to DRAM while providing substantial power savings. Towards this goal, we first analyze the performance and energy of STTRAM, and then identify key optimizations that can be employed to improve its characteristics. Specifically, using partial write and row buffer write bypass, we show that STT-RAM main memory performance and energy can be significantly improved. Our experiments indicate that an optimized, equal capacity STTRAM main memory can provide performance comparable to DRAM main memory, with an average 60% reduction in main memory energy.
FULL PAPER: pdf
