论文标题

关于在内存地址解码器中的BTI老化恢复活力

On BTI Aging Rejuvenation in Memory Address Decoders

论文作者

Gursoy, Cemil Cem, Kraak, Daniel, Ahmed, Foisal, Taouil, Mottaqiallah, Jenihhin, Maksim, Hamdioui, Said

论文摘要

内存设计需要定时余量以补偿衰老和制造过程的变化。随着技术的降低,衰老机制变得更加明显,并且认为有必要更大的利润率。作为回报,这意味着较大的区域需求和较低的内存性能。偏置温度不稳定性(BTI)是衰老的主要因素之一,它会减慢晶体管并最终导致永久性断层。在本文中,首先,我们提出了一种低成本的减轻衰老方案,该方案可以应用于现有硬件以减轻内存地址解码器逻辑的老化。我们通过将复兴工作量应用于内存来减轻BTI对关键晶体管的影响。这种辅助工作负载是定期执行的,以恢复位于地址解码器关键路径上的晶体管。其次,我们分析了工作负载的效率以优化缓解方案。通过逼真的基准测试进行的实验结果表明了几次终生延长,并且可以忽略不计的开销。

Memory designs require timing margins to compensate for aging and fabrication process variations. With technology downscaling, aging mechanisms became more apparent, and larger margins are considered necessary. This, in return, means a larger area requirement and lower performance for the memory. Bias Temperature Instability (BTI) is one of the main contributors to aging, which slows down transistors and ultimately causes permanent faults. In this paper, first, we propose a low-cost aging mitigation scheme, which can be applied to existing hardware to mitigate aging on memory address decoder logic. We mitigate the BTI effect on critical transistors by applying a rejuvenation workload to the memory. Such an auxiliary workload is executed periodically to rejuvenate transistors that are located on critical paths of the address decoder. Second, we analyze workloads' efficiency to optimize the mitigation scheme. Experimental results performed with realistic benchmarks demonstrate several-times lifetime extension with a negligible execution overhead.

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