Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: [OMPI users] FCA collectives disabled by default
From: Brock Palen (brockp_at_[hidden])
Date: 2013-04-02 15:07:57


We are starting to play with FCA on our Mellonox based IB fabric.

I noticed from ompi_info that FCA support for a lot of collectives are disabled by default:

Any idea why only barrier/bcast/reduce are on by default and all the more complex values are disabled?

                MCA coll: parameter "coll_fca_enable_barrier" (current value: <1>, data source: default value)
                MCA coll: parameter "coll_fca_enable_bcast" (current value: <1>, data source: default value)
                MCA coll: parameter "coll_fca_enable_reduce" (current value: <1>, data source: default value)
                MCA coll: parameter "coll_fca_enable_reduce_scatter" (current value: <0>, data source: default value)
                MCA coll: parameter "coll_fca_enable_allreduce" (current value: <1>, data source: default value)
                MCA coll: parameter "coll_fca_enable_allgather" (current value: <1>, data source: default value)
                MCA coll: parameter "coll_fca_enable_allgatherv" (current value: <1>, data source: default value)
                MCA coll: parameter "coll_fca_enable_gather" (current value: <0>, data source: default value)
                MCA coll: parameter "coll_fca_enable_gatherv" (current value: <0>, data source: default value)
                MCA coll: parameter "coll_fca_enable_alltoall" (current value: <0>, data source: default value)
                MCA coll: parameter "coll_fca_enable_alltoallv" (current value: <0>, data source: default value)
                MCA coll: parameter "coll_fca_enable_alltoallw" (current value: <0>, data source: default value)

Brock Palen
www.umich.edu/~brockp
CAEN Advanced Computing
brockp_at_[hidden]
(734)936-1985