论文标题
对现代微处理器的不对称老化作用
Asymmetric Aging Effect on Modern Microprocessors
论文作者
论文摘要
在任何现代微处理器中，可靠性是确保其一生中正确执行的至关重要要求。随着任务关键成分在商品系统中变得普遍；例如，控制自动驾驶汽车，对可靠处理的需求进一步提高了。最新的过程技术甚至加剧了情况。因此，微处理器的设计已极易受到可靠性问题的影响。本文研究了不对称的老化现象，这是晚期过程节点中的主要可靠性问题。在这种现象中，随着时间的流逝，逻辑元素和记忆细胞会遭受不平等的时间降解，因此引入了可靠性问题。到目前为止，大多数研究从电路或物理设计角度接近不对称的老化，但是这些解决方案非常有限且最佳。在本文中，我们介绍了一种不对称的老化的微观架构，旨在减少其影响。该研究主要集中在以下子系统上：执行单元，寄存器文件和内存层次结构。我们的实验表明，所提出的溶液会产生最小的开销，同时显着缓解了不对称的衰老应力。
Reliability is a crucial requirement in any modern microprocessor to assure correct execution over its lifetime. As mission critical components are becoming common in commodity systems; e.g., control of autonomous cars, the demand for reliable processing has even further heightened. Latest process technologies even worsened the situation; thus, microprocessors design has become highly susceptible to reliability concerns. This paper examines asymmetric aging phenomenon, which is a major reliability concern in advanced process nodes. In this phenomenon, logical elements and memory cells suffer from unequal timing degradation over time and consequently introduce reliability concerns. So far, most studies approached asymmetric aging from circuit or physical design viewpoint, but these solutions were quite limited and suboptimal. In this paper we introduce an asymmetric aging aware micro-architecture that aims at reducing its impact. The study is mainly focused on the following subsystems: execution units, register files and the memory hierarchy. Our experiments indicate that the proposed solutions incur minimal overhead while significantly mitigating the asymmetric aging stress.
