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arXiv 2007.02210cs.NEcs.AR
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终身可靠性感知的类脑计算

A Case for Lifetime Reliability-Aware Neuromorphic Computing

Shihao Song, Anup Das

摘要:

具有非易失性存储器(NVM)的类脑计算可以显著提高使用基于尖峰的计算和生物启发的学习算法实现的机器学习任务的性能并降低能耗。操作某些NVM(如相变存储器(PCM))所需的高电压会加速神经元CMOS电路的老化,从而缩短神经形态硬件的寿命。在这项工作中,我们评估了长期的,即,在神经形态硬件上执行最先进的机器学习任务的寿命可靠性影响,考虑负偏置温度不稳定性(NBTI)和时间相关介电击穿(TDDB)等故障模型。基于这样的公式,我们显示了由于神经形态电路的周期性松弛而获得的可靠性-性能权衡,即,一种走走停停的类脑计算。

英文摘要:

Neuromorphic computing with non-volatile memory (NVM) can significantly improve performance and lower energy consumption of machine learning tasks implemented using spike-based computations and bio-inspired learning algorithms. High voltages required to operate certain NVMs such as phase-change memory (PCM) can accelerate aging in a neuron's CMOS circuit, thereby reducing the lifetime of neuromorphic hardware. In this work, we evaluate the long-term, i.e., lifetime reliability impact of executing state-of-the-art machine learning tasks on a neuromorphic hardware, considering failure models such as negative bias temperature instability (NBTI) and time-dependent dielectric breakdown (TDDB). Based on such formulation, we show the reliability-performance trade-off obtained due to periodic relaxation of neuromorphic circuits, i.e., a stop-and-go style of neuromorphic computing.

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