基于数字电视软件平台的JVM分析与研究  

Analysis and Research of Multithreading on DTV Oriented Java Virtual Machine

作　　者：王刚[1] 倪红波[1] 蔡倩[1] 

机构地区：[1]西北工业大学计算机学院,西安710072

出　　处：《微处理机》2008年第4期133-135,共3页Microprocessors

基　　金：国家863高技术发展计划资助项目(2003HM1101)

摘　　要：简要介绍了Java的多线程调度机制和POSIX线程同步机制,并通过对kaffe虚拟机同步机制和加锁机制的深入分析,研究了Java虚拟机内部的同步和加锁机制及其实现。提出一种Java虚拟机锁方案:逻辑锁和物理锁的"双层锁"结构,并在此基础上,提出了利用底层硬件指令来提高加锁速度的"快速锁"加锁方案。最后在数字电视嵌入式平台上进行了虚拟机多线程性能的相关测试。This paper introduces the Java threads scheduling policy and POSIX threads synchronization mechanism briefly, then by deeply analyzing the synchronization and locking mechanism of Kaffe, it studies how the underlying JVM supports the synchronization and locking mechanism of Java and proposes a JVM lock scheme including two lock layers：logic lock and physical lock, based on this, this paper further proposes a ＂fast locking＂ scheme which fastens the locking operation with underlying hardware instructions. A JVM performance test is launched on the DTV platform finally.

关 键 词：虚拟机 多线程 同步 锁 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]