Partially-Forgetful Memories: Relaxing Memory Guard-bands for Approximate Computing
نویسندگان
چکیده
While the memory subsystem is already a major contributor to energy consumption of computing platforms, the guardbanding required for masking the effects of ever increasing manufacturing variations in memories imposes even more energy overhead. In this paper, we explore how PartiallyForgetful Memories can be used by exploiting the intrinsic tolerance of a vast class of applications to some level of error for relaxing this guard-banding in memories. We discuss the challenges to be addressed and introduce Relaxed Cache as an exemplar to address these challenges for partiallyforgetful SRAM caches. Preliminary results show how adapting guard-bands to application characteristics can help the system save significant amount of cache leakage energy (up to 74%) while still generating acceptable quality results.
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