分阶段变化记忆中减少写作干扰的中位扰动障碍 (An In-Module Disturbance Barrier for Mitigating Write Disturbance in Phase-Change Memory)

With the growing demand for technology scaling and storage capacity in server systems to support high-performance computing, phase-change memory (PCM) has garnered attention as the next-generation non-volatile memory to satisfy these requirements. However, write disturbance error (WDE) appears as a serious reliability problem preventing PCM from general commercialization. WDE occurs on the neighboring cells of a written cell due to heat dissipation. Previous studies for the prevention of WDEs are based on the write cache or verify-n-correction while they often suffer from significant area overhead and performance degradation, making it unsuitable for high-performance computing. Therefore, an on-demand correction is required to minimize the performance overhead. In this paper, an in-module disturbance barrier (IMDB) mitigating WDEs is proposed. IMDB includes two sets of SRAMs into two levels and evicts entries with a policy that leverages the characteristics of WDE. In this work, the comparator dedicated to the replacement policy requires significant hardware resources and latency. Thus, an approximate comparator is designed to reduce the area and latency considerably. Furthermore, the exploration of architecture parameters is conducted to obtain cost-effective design. The proposed work significantly reduces WDEs without a noticeable speed degradation and additional energy consumption compared to previous methods.

翻译：由于服务器系统对支持高性能计算的技术规模扩大和储存能力的需求不断增加,对服务器系统支持高性能计算的技术规模和储存能力的需求日益增长,因此,随着下一代非挥发性记忆的满足这些要求,阶段变化记忆(PCM)已引起注意。然而,写扰动错误(WDE)似乎是一个严重的可靠性问题,使PCM无法普遍商业化。书面单元格的相邻细胞由于热耗尽而出现WDE。以前关于预防WDE的研究是基于书面缓存或校验校正能力的研究,而这种研究往往受到巨大的地区间接费用和性能退化的影响,因此,需要按需按需进行点校正,以尽量减少性能管理。因此,本文件建议采用模块内扰动屏障障碍(IMDB)来缓解WDE。IMDB将两套SRAM系统分成两级,并用一种政策驱逐条目。在这项工作中,专门进行替换政策的比较者需要大量硬件资源和耐用度。因此,一个近似比较器的设计是为了大大降低面积和耐用度。此外,需要根据需要进行点校准校准校准校准校准校准校准校准校准校准校准校准校准校准校准,以大幅降低面积和耐用率。本文,以比较一下一下以前的建筑能设计,以便大幅度降低平的建筑结构设计。此外的建筑结构结构设计了以前的设计,以降低低速率。此外的工程设计。此外,以比比比比比的建筑工程设计了以前的设计,以降低了以前的能源成本。此外。此外,不高速率,以降低了以前的能源。此外,以降低了前的建筑的建筑的建筑的建筑的工程设计。此外,以降低了前的建筑的建筑的建筑的建筑的建筑的工程的工程设计方法将降低了前制方法,以降低速率。比较方法,并降低。比比比比比比的建筑的建筑的工程。比较。此外的建筑的建筑的建筑的建筑的工程的工程的工程的工程的工程的工程的工程设计方法将降低了前的工程设计方法将降低速率,不降低速度将降低。比较法将降低了前的工程设计方法将降低了前制,以降低了前制制制制制制制制制。还。此外,以降低了前制制制制。