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Overcoming the power wall by exploiting inexactness and emerging COTS architectural features: Trading precision for improving application quality

机译:通过利用不精确和新兴的COTS架构特征来克服动力墙:提高应用质量的交易精度

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Energy and power consumption are major limitations to continued scaling of computing systems. Inexactness where the quality of the solution can be traded for energy savings has been proposed as a counterintuitive approach to overcoming those limitation. However, in the past, inexactness has been necessitated the need for highly customized or specialized hardware. In order to move away from customization, in earlier work [1], it was shown that by interpreting precision in the computation to be the parameter to trade to achieve inexactness, weather prediction and page rank could both benefit in terms of yielding energy savings through reduced precision, while preserving the quality of the application. However, this required representations of numbers that were not readily available on commercial off-the-shelf (COTS) processors. In this paper, we provide opportunities for extending the notion of trading precision for energy savings into the world COTS. We provide a model and analyze the opportunities and behavior of all three IEEE compliant precision values available on COTS processors: (i) double (ii) single, and (iii) half. Through measurements, we show through a limit study energy savings in going from double precision to half precision are a factor of 3.98.
机译:能源和功耗是对计算系统持续缩放的主要限制。可以提出溶液质量的不精确性,以节省能源节省,作为克服这些限制的违反直觉方法。然而,在过去,不必要的是需要高度定制或专业化的硬件。为了远离定制,在早期的工作[1]中,表明通过解释计算的精度来实现交易的参数,以实现不精确,天气预报和页面排名可以通过节能的效益减少精度,同时保留应用的质量。但是,这种所需的商品现成(COTS)处理器上不易获得的数字表示。在本文中,我们为扩展了扩大交易精确概念的机会,以节省了世界婴儿床。我们提供了一个模型,分析了在COTS处理器上可用的所有三种IEEE兼容精度值的机会和行为:(i)双(ii)单身,(iii)一半。通过测量,我们通过极限研究节能从双重精度到半精度的节省是3.98的因素。

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