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Subject: [OMPI users] Does OpenMPI's MPI_Barrier automatically call the tuned version?
From: Shanyuan Gao (sygao.research_at_[hidden])
Date: 2009-03-23 06:02:03


Here I am again with questions about MPI_Barrier. I did some
benchmark on MPI_Barrier and wondered if OpenMPI's
implementation automatically calls the tuned version of MPI_Barrier,
e.g. tree algorithm, when the number of nodes exceeds 4?

Any thoughts are welcomed. :D