CAREER: Dynamic Optimization of Software Component Systems

现有的基于独立于平台的软件分发格式的面向组件的软件系统将通过动态重新优化器进行扩充。现有的系统已经采用了在单个突发中发生的加载时间代码生成，并将编译速度置于代码质量之前，因此程序可以立即开始执行。额外的重新优化器将通过在后台不断地重新生成所有活动软件组件的目标代码、应用积极的模块间优化技术来改善这种情况。因此，它将把一组独立编译和分发的软件组件组合成一个完全交叉优化的准整体代码映像，然后用新生成的映像取代当前执行的代码版本。重新优化将由运行时分析数据指导，因此后续的重新优化将适应不断变化的使用模式。动态代码生成将使面向组件的系统能够达到甚至超过静态优化软件的效率，尽管它在运行时是可扩展的。在这项研究的同时，将制定一个新的关于语言应用的高级本科课程序列。*

An existing component-oriented software system that is based on a platform-independent software distribution format will be augmented by a dynamic re-optimizer. The existing system already employs load-time code generation that happens in a single burst and puts compilation speed ahead of code quality, so that program execution can commence immediately. The additional re-optimizer will improve this situation by continually re-generating the object code of all active software components in the background, applying aggressive intermodular optimization techniques. Hence, it will combine a collection of independently compiled and distributed software components into a single, fully cross-optimized, quasi- monolithic code image, and then supplant the currently executing version of the code by the newly generated image. Re- optimization will be guided by run-time profiling data, so that successive re-optimizations will adapt to shifting usage patterns. Dynamic code generation will enable component- oriented systems to match or even surpass the efficiency of statically optimized software, in spite of being extensible at run-time. Concurrently with this research, a new upper-division undergraduate course sequence on language implementation will be developed.***