Re: [Myrinet] Changing the route for single messages

Hi Thomas, 

its been a while I experimented with it, but I remember 
having done the following:

1) including "gm_internal.h"
2) opening the GM_MAPPER_PORT_ID i.e., 1
3) using _gm_set_route function 

In gm-1.5.1, you have to be a previledged user to use this function
if GM was compiled with security enabled. Other than that, I dont see 
any reason why it wouldnt work. 

For the format of Myrinet-style routes, take a look at 
$GM_HOME/mt/README. In fact, there is also a sample program that comes 
along with GM that sets routes; see 
$GM_HOME/tests/gm_simpleroute.c

hope that helps,
Vijay
--
Architecture & Real-time Systems (ARTS) Lab,
310 Knowles Engineering Bldg,
UMass Amherst 01003
http://arts.ecs.umass.edu/~vlakamra


On Thu, 21 Feb 2002, Thomas Finley wrote:

> 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]
> 
> _______________________________________________
> Myrinet mailing list
> [email protected]
> http://email.osc.edu/mailman/listinfo/myrinet
>