JESSICA2: a distributed Java Virtual Machine with transparent thread migration support

Proceedings. IEEE International Conference on Cluster Computing Pub Date : 2002-09-23 DOI:10.1109/CLUSTR.2002.1137770

Wenzhang Zhu, Cho-Li Wang, F. Lau

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引用次数: 160

Abstract

A distributed Java Virtual Machine (DJVM) spanning multiple cluster nodes can provide a true parallel execution environment for multi-threaded Java applications. Most existing DJVMs suffer from the slow Java execution in interpretive mode and thus may not be efficient enough for solving computation-intensive problems. We present JESSICA2, a new DJVM running in JIT compilation mode that can execute multi-threaded Java applications transparently on clusters. JESSICA2 provides a single system image (SSI) illusion to Java applications via an embedded global object space (GOS) layer. It implements a cluster-aware Java execution engine that supports transparent Java thread migration for achieving dynamic load balancing. We discuss the issues of supporting transparent Java thread migration in a JIT compilation environment and propose several lightweight solutions. An adaptive migrating-home protocol used in the implementation of the GOS is introduced. The system has been implemented on x86-based Linux clusters and significant performance improvements over the previous JESSICA system have been observed.

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JESSICA2:一个支持透明线程迁移的分布式Java虚拟机

跨多个集群节点的分布式Java虚拟机(DJVM)可以为多线程Java应用程序提供真正的并行执行环境。大多数现有的jvm在解释模式下的Java执行速度很慢，因此在解决计算密集型问题时效率可能不够高。我们介绍JESSICA2，这是一个以JIT编译模式运行的新DJVM，可以在集群上透明地执行多线程Java应用程序。JESSICA2通过嵌入的全局对象空间(GOS)层为Java应用程序提供了一个单一的系统映像(SSI)幻象。它实现了一个集群感知的Java执行引擎，支持透明的Java线程迁移，以实现动态负载平衡。我们讨论了在JIT编译环境中支持透明Java线程迁移的问题，并提出了几个轻量级解决方案。介绍了一种用于GOS实现的自适应迁移到家协议。该系统是在基于x86的Linux集群上实现的，与以前的JESSICA系统相比，性能有了显著提高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings. IEEE International Conference on Cluster Computing

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