[Myrinet] Changing the route for single messages

Hello,

I want to be able to send a message along a route other than that 
specified by the route tables.  In GM, does anyone know of the proper 
method to change routes from within a user program?  (In this context I 
define a user program as a client of GM, rather than something that 
functions on the level of the MCP, for example.)  The programs and papers 
I read on the subject concern themselves with setting routes in the mapper 
rather than letting user programs directly set routes themselves.

I see the _gm_set_route function, but does anyone have experience using it 
in the manner I describe?  It seems a little drastic to change the route 
tables for the purpose of changing the route for a single message, plus 
it's not a proper API function.

My preference is for a solution that works within GM.

Thanks!

-- 
Thomas Finley, [email protected]