异构机群系统上基于多轮分配方式的近似串匹配并行算法

在给定正文串分配轮数的前提下,考虑处理机节点具有不同计算速度、不同通信能力的情形,根据从处理机是否允许重叠执行计算和通信操作,提出异构机群计算环境下的最优正文串多轮分配策略;同时提出一种周期性的正文串多轮分配策略并给出了相应的正文串多轮分配的闭合解,此策略可以求出最优的分配轮数.实验结果表明,正文串多轮分配策略比正文串单轮分配策略大大缩短了近似串匹配并行处理的时间,并且在正文串多轮分配策略中,当近似串匹配应用的规模较小时,分配轮数比参与近似串匹配并行处理的从处理机数更能影响近似串匹配并行处理的完成时间,反之,从处理机数对近似串匹配并行处理的完成时间影响更大.

Parallel Algorithms for Approximate String Matching with Multi-Round Distribution Strategy on Heterogeneous Cluster Computing Systems

For a given round number of text distribution, an optimal text multi-round distribution strategy is presented on the heterogeneous cluster computing systems in which processors have different computing speeds and communication capabilities according to whether the slave processors can execute overlapped computing and communication. Furthermore, a periodic text multi-round distribution strategy is also proposed and its corresponding closed-form expressions are given. For the periodic distribution strategy, a...