The Architecture of a Next Gereration Hultimedia Server

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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.