Try to run with coll_base_verbose 1000, just to see what collective module got effectively loaded.
Aurélien -- Aurélien Bouteiller, Ph.D. ~~ https://icl.cs.utk.edu/~bouteill/ <https://icl.cs.utk.edu/~bouteill/> > Le 9 déc. 2015 à 09:53, Saliya Ekanayake <esal...@gmail.com> a écrit : > > Hi, > > In a previous email, I wanted to know how to enable shared memory collectives > and I was told setting the coll_sm_priority to anything over 30 should do it. > > I tested this for a microbenchmark on allgatherv, but it didn't improve > performance over the default setting. See below, where I tested for different > number of processes per node on 48 nodes. The total message size is kept > constant at 2400000 bytes (or 2.28MB). > > Am I doing something wrong here? > > Thank you, > saliya > > <image.png> > > -- > Saliya Ekanayake > Ph.D. Candidate | Research Assistant > School of Informatics and Computing | Digital Science Center > Indiana University, Bloomington > Cell 812-391-4914 > http://saliya.org > <http://saliya.org/>_______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/12/28153.php
