Re: [BProc] GM_Route Issues with Myrinet Clos256 Switches

[Erik H. <eah...@gm...>]

On 7/5/05, Jeff Rasmussen <jra...@ln...> wrote:
> I'm experiencing issues running gm_route with the Myrinet Clos256
> switches. The mapper runs but does not return any hosts other then the
> mapper itself. I can run myrinet's mapper and gm_board_info will display
> all my nodes. I have also taken an older 16 port switch and plugged
> nodes into it to verify that these boot failures are not related to a
> bad software config and everything worked fine.
>=20
> Is there any updated version of gm_route that will work with the new
> switches?

No.  I doubt there will be either since the new switches are supposed
to fix the sort comings that made all the monkey business in gm_route
necessary in the first place.

> Is there a way to use myrinet's mapper to boot the nodes over gm?

That should be possible (it used to be) but it will take a bit of
work.  I did it by making the mapper into a beoboot plugin.  Basically
you rename 'main', make it into a library and link it into the phase 1
+ phase 2 boot images.  Then there's a tiny bit of glue logic to fork
and call the modified main after the drivers are loaded and then kill
it when phase 1 wants to shut down.  Last time I did this I didn't
have to change any of the mapper source. Renaming, etc. can be done
with objcopy. I just put together a new makefile for it.

- Erik