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Subject: Re: [OMPI users] Displaying Selected MCA Modules
From: Joshua Bernstein (jbernstein_at_[hidden])
Date: 2008-06-20 15:50:59

Thanks for the response Jeff,

Jeff Squyres wrote:
> Greetings Josh.
> No, we don't have an easy way to show which plugins were loaded and
> may/will be used during the run. The modules you found below in
> --display-map are only a few of the plugins (all dealing with the
> run-time environment, and only used on the back-end nodes, so it may not
> be what you're looking for -- e.g., it doesn't show the plugins used by
> mpirun).
> What do you need to know?

Well basically I want to know what MTA's are being used to startup a
job. I'm confused as to what the difference is between "used by mpirun"
versus user on the back-end nodes. Doesn't --display-map show which MTA
modules will used to start the backend processes?

The overarching issue is that I'm attempting to just begin testing my
build and when I attempt to startup a job, it just hangs:

[ats_at_nt147 ~]$ mpirun --mca pls rsh -np 1 ./cpi
[] [0,0,0] ORTE_ERROR_LOG: Not available
in file ras_bjs.c at line 247

The same thing happens if I just disable the bjs RAS MTA, since bjs,
really isn't used with Scyld anymore:

[ats_at_nt147 ~]$ mpirun --mca ras ^bjs --mca pls rsh -np 1 ./cpi

The interesting thing here is that orted starts up, but I'm not sure
what is supposed to happen next:

[root_at_nt147 ~]# ps -auxwww | grep orte
Warning: bad syntax, perhaps a bogus '-'? See
ats 4647 0.0 0.0 48204 2136 ? Ss 12:45 0:00 orted
--bootproxy 1 --name 0.0.1 --num_procs 2 --vpid_start 0 --nodename --universe
ats_at_[hidden]:default-universe-4645 --nsreplica

Finally, it should be noted that the upcoming release of Scyld will now
include OpenMPI. This notion is how all of this got started.

-Joshua Bernstein
Software Engineer
Penguin Computing