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 bro...@umich.edu (734)936-1985