On Mon, Jul 21, 2008 at 4:56 PM, Sean Hefty <[EMAIL PROTECTED]> wrote: >>Does RC require reversible paths ? Can't the two directions use >>different paths or is that only UD ? > > The CM requires a reversible path for its MADs. Additionally, neither the > linux > nor windows CM _implementations_ support non-reversible path records. > >>> I'm not sure that most MPI apps will run through an IB router, so always >>> querying for off subnet paths will probably be needed. >> >>That seems contradictory. Do you mean not needed rather than needed ? > > I mean that all PRs that have endpoints on different subnets should be > obtained > from the SA. If PRs can be generated locally to a node, then the PRs should > only be generated if the destination is on the same subnet.
OK; I missed the distinction between on and off subnet previously. >>> (The current PR format >>> only works for UD traffic between IB subnets anyway.) >> >>Not sure why you say that. > > Connected QPs require LID pairs for both subnets. The PR only carries one of > the LID pairs. For the reversible path case. -- Hal > > - Sean > > _______________________________________________ ofw mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/ofw
