| 摘要: |
| 并行程序的不确定性使其调试时不能象串行程序调试那样通过反复执行程序来查找错误，因此，记录并重演是并行调试的关键技术，而这一技术的最大开销就是事件的记录．本文结合PVM（Parallelvirtualmachine）的特点，改进了Netzer等人提出的优化记录法，使事件记录在出现非传递的消息竞争时也是最优的，并保证同一进程发送消息时，不会象原算法一样可能进行记录，同时，还在PVM并行调试环境中实现了该方法． |
| 关键词: PVM（parallelvirtualmachine） 记录 偏序 重演 消息竞争 传递竞争 非传递竞争 |
| DOI： |
| 分类号: |
| 基金项目:本文研究得到航空基金资助. |
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| THE IMPROVEMENT AND APPLICATION OF OPTIMAL TRACING IN PVM |
|
HUANG Ning,JIN Maozhong
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| Abstract: |
| Parallel programs can not be debugged as sequential ones repeatly because of their nondetermination，SO tracing and replay become the key technique of parallel debug-ging，and the most overhead of this technique is tracing the events．This paper improves the optimal tracing method provided by Rober Netzer etc．by combining the characteristics of PVM(parallel virtual machine)，makes the events tracing optimal even when non-tran-sitive message race appears．The improved method has been implemented in PVM_based parallel clebugger． |
| Key words: PVM tracing partial order replay message race transitive race nontransitive race |
