摘要
对JIAJIA 和MPI (message passing interface)是进行了比较.JIAJIA 和MPI 分别代表共享存储和消息传递的编程模式.MPI 显式进行数据传输,编程复杂;JIAJIA 由底层维护数据一致性,并附加提供简单的消息传递函数,编程容易、灵活.JIAJIA 分配共享内存时开销较大,初始化时间比MPI 长.提出了一个关于并行加速比与进程数目之间关系的近似经验公式,推出JIAJIA 和MPI 性能差距随着进程数目的增多而增大的结论.测试结果表明,大部分应用程序的JIAJIA 和MPI 版本的并行性能差距不超过10%.对于通信量很小的应用程序,其JIAJIA 和MPI 的性能差距较小,而通信量本身较大的应用程序,其JIAJIA 和MPI 的性能差距主要取决于运行时产生的实际通信量.
JIAJIA and MPI (message passing interface) are compared. JIAJIA and MPI represent the programming model of share memory and message passing respectively. MPI handles message transmission manually and is hard for programming. JIAJIA maintains data coherence by lower layer and provides simple message passing APIs, so it is easy and flexible to program. It takes more time for JIAJIA to initialize applications than MPI. A rough empirical formula about speedup and machine size is presented. Experimental results show that both JIAJIA and MPI have good parallel performance on PC clusters and their performance difference of most testing applications is lower than 10 percent. Applications with fewer messages have better performance and the gap between JIAJIA and MPI is minor. While messages increase, parallel performance decreases and the gap between JIAJIA and MPI depends on the amount of messages they produce.
出处
《软件学报》
EI
CSCD
北大核心
2003年第7期1187-1194,共8页
Journal of Software
基金
国家自然科学基金
中国科学院计算技术研究所领域前沿青年基金~~
