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The Architecture of a Next Gereration Hultimedia Server

下一代多媒体服务器的架构

基本信息

批准号：
10558045
负责人：
TOMITA Shinji
金额：
$ 8.13万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

The project consists of following three themes :1. ReVolver/C40: a volume rendering architectureWe developed a prototype of the ReVolver/C40 volume rendering architecture as a visualization mechanism for the next generation multimedia server. Volume rendering, which is a scheme to directly visualize volume data, is hard to execute in real-time because of bank conflict on the memory. ReVolver/C40 has a memory system free from bank conflict. The evaluation result of developed prototype shows that ReVolver/C40 can render about six frames per second.2. A hybrid processor architecture between control-and data-drivenWe proposed Dualflow as a processor architecture for the next generation multimedia server. The architecture does not define registers and the instructions pass operands directly. Superscalars implements the instruction scheduling logic with a CAM, and the logic may become the critical path of the system. Dualflow can replace the CAM with a RAM. We developed a compiler and evaluated it with the SPEC benchmark. The result shows it inserts a lot of extra instructions, and needs another optimization to remove them.3. High-speed Java bytecode executionHigh-speed execution of Java bytecode is necessary for the next generation multimedia server. We proposed a Value Look-aside Buffer. Value Look-aside Buffer memorizes pairs of pre-and post-states of the past executions. When the machine states matches one of the memorized pre-states, it can eliminate the execution just by replacing it with the post-state. The results of the simulation study shows it can speeds-up about 47.1% at best.

1.Revolver/C40：体绘制体系结构我们开发了一个Revolver/C40体绘制体系结构的原型，作为下一代多媒体服务器的可视化机制。体绘制是一种直接对体数据进行可视化的方案，但由于内存上的存储体冲突，很难实时执行。左轮手枪/C40有一个没有存储体冲突的存储系统。样机的评估结果表明，Revolver/C40的渲染速度约为每秒6帧。控制驱动和数据驱动的混合处理器体系结构我们提出了Dualflow作为下一代多媒体服务器的处理器体系结构。该体系结构不定义寄存器，指令直接传递操作数。超标量用CAM实现指令调度逻辑，该逻辑可能成为系统的关键路径。Dualflow可以用RAM取代CAM。我们开发了一个编译器，并用SPEC基准测试对其进行了评估。结果表明，它插入了大量的额外指令，需要进行另一次优化才能将其删除。Java字节码的高速执行下一代多媒体服务器需要高速执行Java字节码。我们提出了一种价值后备缓冲器。值后备缓冲区存储过去执行的前状态和后状态对。当机器状态与记忆的前状态之一匹配时，它只需将其替换为后状态即可消除执行。仿真研究结果表明，该算法最多可提高约47.1%的速度。