マルチメディア指向超並列マシンアーキテクチャーとそのソフトウェア実用化の研究

最近，面向多媒体的应用已成为人们普遍感兴趣的问题。目前已经开发了几种类型的多媒体系统。然而，这些系统只提供简单的应用，如解码视频流、传输视频图像。在本研究中，我们的理念是构建一个能够提供灵活、高性能多媒体环境的多媒体系统。为了实现我们的理念，我们从以下三个方面进行了研究：1.多媒体机器的体系结构(I)处理器单元体系结构我们选择了多线程的基本体系结构Ddatarol-II。每个处理器单元由商用微处理器和FMP(细粒度消息处理器)组成。FMP提供低延迟的消息处理。(Ii)网络架构我们构建了一个无死锁的2D环面互连网络。该网络是可扩展的，并提供…更多低延迟和高吞吐量通信。(3)原型设计为了研究上述概念，我们设计并实现了一个具有16个处理器单元的原型机器Kump/D。(4)性能评估我们通过一个模拟器展示了我们的概念在细粒度多线程处理方面的优势。2.软件环境(I)大规模并行语言VV是一种具有并行对象的基于数据流的函数式语言，称为代理。为了实现良好的可移植性，V编译器分为两个阶段。V编译器在第一阶段生成与机器无关的代码DVMC(Datarol Virtual Machine Code)，在第二阶段生成与机器相关的代码。(Ii)大规模并行语言V的开发我们研究了V的代码生成方法，开发了多线程并行处理库。我们还定义了多媒体数据类型和分配。3.并行图像处理我们用V开发了几种类型的图像处理应用程序，并对性能进行了评估。通过这种评估，我们表明程序员可以简单而直接地用V来描述图像处理应用程序。我们还发现并行处理的速度有显著的提高。基于消流语义库的大规模并行语言V在开发并行图像处理应用程序中是非常有效的。较少

Recently multimedia oriented applications have become of general interest. Currently several-types of multimedia systems are developed. However these systems provide only simple applications, such as decoding video stream, transferring video image. Furthermore, those system do not hove enough resolution in time and space.In this research, our concept is constructing the multimedia system which provides flexible and high performance multimedia environment.To realize our concept, we researched in following three subjects.1.Architecture of Multimedia Machine(i) Processor Element architectureWe chose multi-thread base architecture Ddatarol-II.In this research we refined this architecture to conform recent hardware environments. Each processor element consists of commercial micro processor and FMP (Fine-grain Message Processor). FMP provides low latency message handling.(ii) Network architectureWe built a deadlock free 2D torus interconnection network. This network is scalable, and provides … More low latency and high throughput communications. In addition we designed specialized network for I/O and a real time video I/O system.(iii) Prototype designTo investigate above concepts, we designed and produced a prototype machine KUMP/D which has 16 processor elements.(iv) Performance EvaluationWe showed advantages of our concepts in fine-grain multi-thread processing by a simulator.2.Software Environment(i) Massively Parallel Language VV is a dataflow semantic base functional language with parallel objects which are called agents. To achieve well portability, the V compiler has two phase. The V compiler generates machine independent code DVMC (Datarol Virtual Machine Code) in the first phase, and generates machine depend code in second phase.(ii) Development of Massively Parallel Language VWe investigated code generation method for V,and developed library for multi-thread parallel processing. We also defined multimedia data types and assignment.3.Parallel Image ProcessingWe developed several types of image processing applications by V,and evaluated performance. By this evaluation, we showed that a programr can describe image processing applications simply and directly by V.We also ascertained remarkable speed up by parallel processing. Detaflow semantic base massively parallel language V is quite effective in developing parallel image processing applications. Less