[OMPI users] Does OpenMPI's MPI_Barrier automatically call the tuned version?

[Shanyuan Gao]

HI,

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

Shan