什么是OpenMPI(V2.0.2)中的分段环减少?它如何流水线化? [英] What is Segmented Ring Allreduce in OpenMPI (V2.0.2)? How is it pipelined?

问题描述

我一直在尝试了解

I have been trying to understand the Segemented Ring Allreduce in OpenMPI (V2.0.2). But I failed to figure out this pipelined ring allreduce, especially how the phases are pipelined. (i.e. COMPUTATION PHASE 1 (b) seems to perform the two phases concurrently instead of "pipelinely".) Could MPI experts provide the motivation behind this Segmented Ring Allreduce and details about the pipeline?

非常感谢， 狮子座

推荐答案

我认为已在 https://github.com/open-mpi/ompi/issues/4067

关于Open MPI内部的非常具体的问题，最好直接向Open MPI邮件列表或

very specific questions regarding the internals of Open MPI, are better asked directly to the Open MPI mailing list(s) or github repository

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