arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.13320cs.AR
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动态可靠性和功耗管理的运行时间精度可重构随机计算

Run-Time Accuracy Reconfigurable Stochastic Computing for Dynamic Reliability and Power Management

Shuyuan Yu, Han Zhou, Shaoyi Peng, Hussam Amrouch, Joerg Henkel, Sheldon X. -D. Tan

摘要:

在本文中,我们提出了一种新的精度可重构随机计算(ARSC)的动态可靠性和电源管理框架。与现有的随机计算工作不同,其中在设计时间中执行精度与功率/能量的权衡,新的ARSC设计可以在运行时间中改变数据的精度或位宽,使得它可以通过以精度为代价减慢系统时钟频率来适应长期老化效应,同时保持计算的吞吐量。我们验证了ARSC的概念上的离散余弦变换(DCT)和逆DCT设计的图像压缩/解压缩的应用,这是实现Xilinx Spartan-6系列XC 6SLX 45平台。实验结果表明,新的设计可以很容易地减轻长期老化引起的影响的准确性权衡,同时保持整个计算过程的吞吐量,使用简单的频率缩放。我们进一步表明,输入数据的一位精度损失,其转化为图像的峰值信噪比方面的3.44 dB的精度损失,我们可以在10年内充分补偿NBTI引起的老化效应,同时保持老化前每秒7.19帧的计算吞吐量。同时,在精度损失10.67dB的情况下,可节省74%的功耗。所提出的ARSC计算框架还允许更积极的频率缩放,与传统的动态电压和频率缩放(DVFS)技术相比,这可以导致数量级的功率节省。

英文摘要:

In this paper, we propose a novel accuracy-reconfigurable stochastic computing (ARSC) framework for dynamic reliability and power management. Different than the existing stochastic computing works, where the accuracy versus power/energy trade-off is carried out in the design time, the new ARSC design can change accuracy or bit-width of the data in the run-time so that it can accommodate the long-term aging effects by slowing the system clock frequency at the cost of accuracy while maintaining the throughput of the computing. We validate the ARSC concept on a discrete cosine transformation (DCT) and inverse DCT designs for image compressing/decompressing applications, which are implemented on Xilinx Spartan-6 family XC6SLX45 platform. Experimental results shows that the new design can easily mitigate the long-term aging induced effects by accuracy trade-off while maintaining the throughput of the whole computing process using simple frequency scaling. We further show that one-bit precision loss for input data, which translated to 3.44dB of the accuracy loss in term of Peak Signal to Noise Ratio for images, we can sufficiently compensate the NBTI induced aging effects in 10 years while maintaining the pre-aging computing throughput of 7.19 frames per second. At the same time, we can save 74\% power consumption by 10.67dB of accuracy loss. The proposed ARSC computing framework also allows much aggressive frequency scaling, which can lead to order of magnitude power savings compared to the traditional dynamic voltage and frequency scaling (DVFS) techniques.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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