Subject: [OMPI devel] sm BTL "extra procs" From: Eugene Loh (Eugene.Loh_at_[hidden]) Date: 2008-12-22 11:47:16
Why does the sm BTL allocate "extra procs"?
E.g.,
https://svn.open-mpi.org/trac/ompi/browser/branches/v1.3/ompi/mca/btl/sm/btl_sm.c?version=19785#L403
In particular:
*) sm_max_procs is -1 (so there is no max) *) sm_sm_extra_procs (sic, this is the ompi_info name) is 2
So, if there are n procs on the node, it allocates FIFOs for n*(n+2) connections. Why?
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