Research Initiation: Distributed Operating Systems and Machine Architecture: Reducing the Semantic Gap

正在设计和开发用于分布式计算系统中高效消息传递和对象调用的新的和创新的硬件机制。分布式环境的操作系统结构遵循两种范例之一：消息传递或对象调用。为了使这样的系统有效地执行，基本消息必须以短的延迟传递。限制因素，尤其是短消息，通常不是网络带宽，而是处理开销。操作系统中的资源也可以被视为对象的集合。前人的研究表明，对象调用依赖于内存管理的效率。这位首席研究员目前正在扩展他之前在基于消息的系统上的性能研究，通过实验验证这些研究，调查网络共享内存多处理器的硬件支持；开发新的高效对象调用的硬件机制，并通过模拟和实验对这些机制进行评估。

New and innovative hardware mechanisms for efficient message passing and object invocation in a distributed computing system are being designed and developed. Operating systems structures for a distributed environment follow one of two paradigms: message passing or object invocation. For such a system to perform efficiently basic messages must be passed with short delays. The limiting factor, especially for short messages, is typically not network bandwidth but processing overhead. Resources in an operating system can also be viewed as a collection of objects. Previous research of the principal investigator has shown that object invocation is dependent on the efficiency of memory management. The principal investigator is currently extending his previous performance studies on message-based systems, verifying these studies through experimentation, investigating hardware support for networked shared-memory multiprocessors; developing new hardware mechanisms for efficient object invocation, and evaluating these mechanisms through simulation and experimentation.