Ralph Castain 68912d04a8 Fix the grpcomm operations at scale. Restore the direct component to be the default, and to execute a rollup collective. This may in fact be faster than the alternatives, and something appears broken at scale when using brks in particular. Turn off the rcd and brks components as they don't work at scale right now - they can be restored at some future point when someone can debug them. ...

Adjust to Jeff's quibbles

Fixes open-mpi/mpi#1215

2016-02-04 05:42:29 -08:00

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