多核平台下的高效线程级猜测执行机制研究

项目名称： 多核平台下的高效线程级猜测执行机制研究

项目编号： No.61272143

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 自动化技术、计算机技术

项目作者： 沈立

作者单位： 中国人民解放军国防科学技术大学

项目金额： 60万元

中文摘要： 如何简洁、高效地利用处理器中集成的丰富计算资源，是多核体系结构带来的一个重要挑战。为解决这一问题，必须将编程模型、运行时环境及体系结构有机地结合在一起。尽管线程级猜测执行（Thread Level Speculation，TLS）机制具备解决该问题的足够潜力，但由于缺乏体系结构和运行时环境支撑，TLS的自身开销又比较大，严重制约了其实际效果。本项目将从深入分析TLS机制自身的特点入手，研究并提出高效的TLS模型，以及多核体系结构和运行时环境对TLS的高效支撑机制，在此基础上总结TLS编程模型，设计编译框架，自动将串行C/C++代码或二进制代码转换为多线程代码，并获得有效的性能提升。本项目研究将在软硬协同的TLS模型、高效支持TLS的体系结构和运行时环境、面向TLS的编译技术和线程划分策略等方面取得创新研究成果。这些成果可以直接应用于多核乃至众核平台设计，具有重要的理论意义和实际应用价值。

中文关键词： 线程级前瞻；多核处理器体系结构；优化；能耗；运行时环境

英文摘要： How to utilize the computation resources integrated into processors in a simple and efficient way is an important challenge brought by current multi-core architectures. To solve this problem, programming model, runtime environment and architecture must be combined together reasonably. Although TLS (Thread Level Speculation) mechanism has enough potential to be a candidate, its effect is constrained greatly by the lack of supports from architecture and runtime environment, and the great overhead from TLS mechanism itself. This project will start from a deep analysis of characteristics of current TLS mechanisms. Then, efficient TLS model, efficient supporting mechanisms from multi-core architecture and runtime environment will be studied and proposed. Finally, based on them, a TLS-oriented programming model and corresponding compilation framework will be proposed, with which sequential C/C++ codes or binary codes can be converted to multi-thread codes automatically and effective performance improvement can also be obtained. Researches in this project will obtain some innovation results including co-designed TLS model, efficient supporting mechanisms of TLS from architecture and runtime environment, TLS-oriented compilation techniques and thread identification strategies, etc. They could be used directly in current

英文关键词： Thread Level Speculation；Multicore Processor Architecture；Optimization；Power Consumption；Runtime Environment