SHF: Small: AfterBurner: Efficient Performance Scaling via Post-Retirement Processing

SHF：小型：AfterBurner：通过退役后处理实现高效性能扩展

• 批准号: 1017654
• 负责人: Mark Hempstead
• 金额: $ 11.9万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1017654&HistoricalAwards=false
• 关键词: SHF; Small; AfterBurner; Efficient; Performance; SHF; Small; AfterBurner; Efficient; Performance

The AfterBurner project looks at improving single-thread performance on both simple and high-performance out-of-order cores in an energy efficient way. Aside from explicit parallelism, this is the primary challenge of multi-core architectures going forward. The most energy-efficient way to improve single-thread performance is to accelerate low-performing program regions. This approach yields the greatest benefit. It also has a low cost because it doesnot require high-bandwidth execution, making it applicable to both simple and high-performance cores. Low single-thread performance is caused by squashes due to control and data mis-speculations and by long latency loads and stores which clog the pipeline. AfterBurner unifies two recently proposed techniques---speculative retirement which can efficiently buffer large numbers of completed instructions and selective re-execution which can re-execute dynamically generated program subgraphs to back-patch program state---and uses them to tolerate all four classes of low-performance events. AfterBurner's multi-purpose infrastructure approach to performance reduces cost, simplifies design, and expands applicability to code that suffers from different low-performance events simulatenously.In addition to education and student tarining, the AfterBurner project marks the beginning of a systems research collaboration between Uniersity of Pennsylvania and Drexel computer science departments.

燃烧器项目着眼于以节能的方式改善简单和高性能外部核心上的单线程性能。 除了明确的并行性外，这是未来多核体系结构的主要挑战。提高单线程性能的最节能方法是加速表现不佳的计划区域。 这种方法带来了最大的好处。 它的成本也很低，因为它不需要高带宽执行，因此它适用于简单和高性能的内核。 低单线程性能是由控制和数据错误指控以及堵塞管道的长延迟负载和存储所引起的。 燃烧室统一了两项最近提出的技术---投机性退休，可以有效缓冲大量完整的指令和选择性重新执行，可以重新执行动态生成的程序子图以进行后置程序状态 - 并使用它们来容忍所有四类低表现事件。加力者的多功能基础设施方法的性能降低成本，简化设计并将适用性扩展到遭受不同低性能事件的代码中。在教育和学生tarining中，换手项目还标志着宾夕法尼亚州宾夕法尼亚州宾夕法尼亚州不居口和Drexel Computer Computer Science Science Science Science Science Science Science Science Science Science的系统研究合作的开始。