Collaborative Research: CSR---EHS: Cross-System Modeling and Management for Variation-Adaptive Computing

本项目的目标是为开发较低级别的系统建模和参数调整技术，并将这些与较高级别的体系结构和系统管理方法联系起来，列出策略和抽象。该项目还旨在用更深入的分析方法支持现有的制造后调整技术，并用随着系统的使用不断进行的更动态的管理技术来加强这些一次性调整。为了实现从非常静态(一次性)调优到非常动态(持续)的功率性能调优的转变，需要细节和抽象各不相同的模型。这允许操作系统动态使用快速但抽象的模型，以便动态调整功率/热量行为，以便在满足性能目标的同时保持在预算之内。微体系结构技术也可以使用，但同样需要良好的模型和测量技术来指导它们的使用。该项目将解决这些建模问题和相关的即时管理技术。研究计划在几个方面追求广泛的影响。首先，该项目是知识传播和技术转让的重要组成部分。本项目中提出的建模和管理技术将被分发并发布供免费使用。基于对本科生研究和代表性不足群体的大力支持的记录，私人投资机构将继续并通过这种合作扩大此类活动。由于CMU和普林斯顿的地理位置接近，小组会议将有可能在整个项目期间将这两项工作统一起来。

The goal of this project is to lay out strategies and abstractions for developing lower-level system modeling and parameter tuning techniques, and for linking these to higher-level architectural and system management approaches. The project also aims to back existing post-manufacturing tuning techniques with deeper analytic methods, and to augment these one-time adjustments with more dynamic management techniques that are ongoing as the system is in use. To make the shift from very static (one-time) tuning towards very dynamic (ongoing) power-performance tuning, one needs models whose detail and abstraction vary. This allows fast, but abstract models to be used dynamically by the operating system, in order to dynamically adjust power/thermal behavior in order to stay within budget while also meeting performance goals. Microarchitectural techniques can also be employed, but likewise need to be informed by good models and measurement techniques to guide their use. The project will address these modeling issues and the associated on-the-fly management techniques.The research program pursues broad impact in several ways. First, the project has an important component for knowledge dissemination and technology transfer. The modeling and management techniques proposed in this project will be disseminated and released for free use. Building on a record of strong support for undergraduate research and underrepresented groups, the PIs will continue and broaden such activities through this collaboration. Because of the geographic proximity of CMU and Princeton, group meetings unifying the two efforts will be possible throughout the project.