Title : Adaptive Memory Systems for Improved Performance, Efficiency, Reliability,
and Fairness
Speaker : Prof. Mattan Erez (Assistant Professor at the University of Texas at Austin)
Date & Time : 2012. 3. 13. 화요일 오전 10:00
Where : 융기원 A-202 (세미나룸Ⅳ)
Abstract
The memory system continues to be a significant bottleneck to increasing the performance of multicore processors and SoCs, and the constraints on bandwidth, energy, and reliability are only getting tighter. Under these tightening constraints of bandwidth, power, and energy, resource proportionality can significantly boost overall performance and reduces cost. In this talk I will focus my group"s vision and initial work towards achieving error protection with overheads that are proportional to actual application needs and on dynamically adapting memory system characteristics. Specifically, and time permitting, I will discuss dynamic and flexible cooperative error protection, variable granularity memory access, proportional protection for phase-change memory, and adaptive QoS for GPU/CPU SoCs. Flexible cooperative protection recognizes that different computations and data require different degrees of protection, and hence different amounts of resources for acceptable execution outcomes. For example, our technique of virtualizing memory protection enables such dynamic reliability tradeoffs and relaxes design constraints to significantly improve error-protection efficiency without sacrificing protection level. Variable granularity memory accesses is an example of the benefits of flexible protection and relaxes the trend of ever-increasing access granularities. Adaptive granularity improves utilization of scarce memory bandwidth and operating power resources by multiple factor for applications with fine-grained gather/scatter access patterns.
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