MPI中涉及依赖于操作顺序的浮点计算的操作有MPI_Allreduce、MPI_Reduce、MPI_Reduce_scatter、MPI_Scan和MPI_Exscan。MPI集合通信操作有很多不同的集合通信算法。不同的算法,规约顺序不同,最终计算结果也不尽相同,以Allreduce Algorithm为例(Recursive Doubling对比Rabenseinf
This approach has been successfully applied to the most popular parallel matrix multiplication algorithm, SUMMA, and the state-of-the-art MPI broadcast algorithms, demonstrating significant multifold performance gains, especially for large-scale HPC systems. In this paper, we apply this approach to ...
MPI_Reduce:它将每个进程的数据进行规约操作,并将结果发送到指定的进程。常见的规约操作包括求和、求最大值、求最小值等。每个进程将贡献数据发送给规约操作的目标进程,然后目标进程执行规约操作,并将结果返回给所有进程。 MPI_Allreduce:它类似于MPI_Reduce,但是将规约操作的结果发送给所有进程,而不仅仅是目标进程。
/* valid values for coll_tuned_allreduce_forced_algorithm */ static mca_base_var_enum_value_t allreduce_algorithms[] = { {0, "ignore"}, {1, "basic_linear"}, {2, "nonoverlapping"}, {3, "recursive_doubling"}, {4, "ring"}, {5, "segmented_ring"}, { 6, "rabenseifner"}, {0...
On a preliminary test, we examine its efficiency, and we discuss and compare it with the existing algorithms by introducing a performance model of our algorithm.关键词: MPI Rabensefner's algorithm allreduce binary-based algorithm binomial algorithm collective communication ...
Code Issues Pull requests A reduction algorithm for MPI using only peer to peer communication mpi collective-communication mpi-reduce Updated Jan 3, 2022 C++ bnafack / MPI Star 0 Code Issues Pull requests mpi parallel-computing message-passing-interface mpi-scatter mpi-gather mpi-reduce mpi...
Using MPI_Reduce and MPI_Allreduce for parallel number reduction (中文版) 组通信:Groups and communicators Introduction to groups and communicators (中文版) 2.2 MPI的运行流程 2.2.1 MPI的单机通信 2.2.2MPI的多机通信及优化 之后再专门继续补充MPI。。。博大精深 3.Openmp-多线程共享内存并行 3.1 openmp...
The processes in the illustration (labeled 0 through 3) start with four numbers - 5, 2, 7, and 4. The parallel rank algorithm then computes that process 1 has rank 0 in the set of numbers (i.e. the first number), process 3 has rank 1, process 0 has rank 2, and process 2 has...
R. Rabenseifner, A new optimized MPI reduce algorithm, 1997...View more references Cited by (11) Self-healing network for scalable fault-tolerant runtime environments 2010, Future Generation Computer Systems Citation Excerpt : The MPICH implementation [3] uses a parallel runtime environment called...
|__algorithm.h---#常用图算法的MapReduce实现 |__graph.h---#定义了图数据结果和常用的集中图操作函数 make clean && make 2. 运行gmr 单机运行 命令./startgmr.sh [algorithm] [partition] [graphfile] 支持./startgmr.sh [pagerank 或 sssp 或 trianglecount] [random 或 metis] [small 或 4elt ...