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，面向多媒体的应用程序已成为普遍的兴趣。目前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，我们的概念是建构多媒体系统，提供弹性且高效能的多媒体环境，为了实现我们的概念，本文从以下三个方面进行了研究：1.多媒体机的体系结构（i）处理器单元体系结构在本研究中，我们改良此架构以符合目前的硬体环境。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提供低延迟消息处理。(ii)网络结构我们建立了一个无死锁的二维环面互连网络。该网络是可扩展的，并提供 关于我们 低等待时间和高吞吐量通信。此外，还设计了专用的I/O网络和一个真实的实时视频I/O系统。(iii)原型设计为了研究上述概念，我们设计并制作了一台具有16个处理器元件的原型机KUMP/D。(iv)性能评价通过一个模拟器，我们展示了我们的概念在细粒度多线程处理中的优势。2.软件环境（i）大规模并行语言VV是一种基于语义的函数式语言，它具有称为代理的并行对象。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，并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，并评估了性能。通过这种评价，我们表明，程序员可以简单，直接地描述图像处理应用程序的V。我们还确定了显着的速度提高并行处理。基于细节流语义的大规模并行语言V是开发并行图像处理应用程序的有效工具。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