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Spin-Transfer Torque RAMs (STTRAMs) have been shown to offer much promise forimplementing emerging cache architectures. This paper studies the viability ofSTTRAM caches for mobile workloads from the perspective of energy and latency.Specifically, we explore the benefits of reduced retention STTRAM caches formobile applications. We analyze the characteristics of mobile applications'cache blocks and how those characteristics dictate the appropriate retentiontime for mobile device caches. We show that due to their inherently interactivenature, mobile applications' execution characteristics---and hence, STTRAMcache design requirements---differ from other kinds of applications. We alsoexplore various STTRAM cache designs in both single and multicore systems, andat different cache levels, that can efficiently satisfy mobile applications'execution requirements, in order to maximize energy savings without introducingsubstantial latency overhead.

Energy and Performance Analysis of STTRAM Caches for Mobile Applications