A Java Accelerator

• Main Authors: Yi-Ting Wang, 王怡婷
• Other Authors: Ting-Wei Hou
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/66079195476925769965

碩士 === 國立成功大學 === 工程科學系碩博士班 === 94 === In this thesis, we are to speedup the performance of Java programs. We design and implement a Java hardware accelerator to cooperate with the JamVM, an implementation of Java Virtual Machine (JVM). Keeping JVM original structure, instructions are classified into two groups: software interpretation and execution by hardware directly. When executing a Java program, a block of (micro-code) hardware instructions for those to be executed Bytecode instructiona are dynamically loaded into the hardware accelerator by JVM. Then control transfers to the hardware accelerator. After the block completes execution, control transfer backs to JVM. The speedup of the hardware accelerator depends on application programs. For the benchmark program that does not have repeatative execution of a single block, the Java accelerator does not accerlerate, instead a little bit slower because of the loading (microcode) overhead. However, for benchmark programs with highly repeated exection rate of a single block, its speed up is between 3.5 to 7.