CPA-CSA: Tera-PCM: A Low Power Terabyte Main Memory using Phase Change Memory

芯片多处理器(CMPS)的出现开启了台式机高性能的新时代。在几年内，台式计算机可能拥有数十个甚至数百个CPU，从而实现千万亿级的性能。然而，一个问题迫在眉睫：当前的内存技术无法跟上未来应用程序数据集的TB大小和规模。该项目旨在克服构建TB级和更高主存的障碍。我们的方法用相变存储器(PCM)构成的更大的主存储器取代了用传统DRAM构造的大容量主存储器。PCM具有良好的可扩展性，极低的功耗，并且对错误不敏感。要使用PCM，有几个挑战，包括相对较慢的性能和较差的写入耐久性。我们将开发一种新的存储体系结构，称为Tera-PCM，以管理PCM访问延迟并提高PCM寿命。我们的假设是，Tera-PCM可以用来构建用于桌面CMP的TB级存储器，其性能和耐用性与DRAM相媲美，且功耗更低。该项目将通过研究机会和行业实习对本科生和研究生产生影响。来自计算机科学和计算机工程专业代表性不足的群体的学生将被招募参加，进一步促进多样性。

The emergence of chip multiprocessors (CMPs) is ushering in a new era of high-performance on the desktop. Within several years, desktop computers could have tens to even hundreds of CPUs, leading to petascale performance. However, a problem looms on the horizon: current memory technology will not keep pace with the terabyte size and scales of future application data sets.This project aims to overcome the obstacles of building a terabyte and beyond main memory. Our approach replaces a large main memory constructed with conventional DRAM with an even larger main memory constructed with phase-change memory (PCM). PCM has good scalability, exceptionally low power consumption, and no susceptibility to errors. To use PCM, there are several challenges, including relatively slow performance and poor write endurance. We will develop a new memory architecture, called Tera-PCM, to manage PCM acceess latency and to increase PCM longevity. Our hypothesis is that Tera-PCM can be used to construct a terabyte memory for desktop CMPs that is performance and endurance competitive with DRAM at a lower power cost. The project will impact both undergraduate and graduate students, through research opportunities and industry internships. Students from under-represented groups in computer science and computer engineering will be recruited to participate, furthering diversity.