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From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2005-08-08 11:44:42


I just added a new command line option and changed the behavior of
orterun with respect to MCA paramters to behave more the way one would
expect. See my commit message below from r6764 for details.

Begin forwarded message:

> Author: jsquyres
> Date: 2005-08-08 11:42:28 -0500 (Mon, 08 Aug 2005)
> New Revision: 6764
>
> Modified:
> trunk/ompi/tools/ompi_info/ompi_info.cc
> trunk/opal/mca/base/base.h
> trunk/opal/mca/base/mca_base_cmd_line.c
> trunk/orte/tools/orterun/orterun.c
> Log:
> Fix a problem where orterun itself would not receive MCA parameters
> that were set on the command line. This was techinically exactly the
> way the code was designed, but it certainly violated the Law of Least
> Astonishment (even to its designer ;-) ). So now if you execute
> something like this:
>
> mpirun -mca pls_rsh_debug 1 -np 4 hello
>
> You'll see debugging output from the rsh pls component, as you would
> expect (this was not previously the case -- the MCA pls_rsh_debug
> parame would be set to 1 in the 4 spawned hello processes, but *not*
> in the orterun process).
>
> More specifically, MCA parameters will be set in the orterun process
> in the following cases:
>
> - The new command line switch "--gmca" (or "-gmca") is used,
> indicating that the MCA parameter is "global". --gmca also means
> that that MCA parameter will be applied to all context app's. For
> example:
>
> mpirun -gmca foo bar -np 1 hello : -np 2 goodbye
>
> The foo MCA param will be set in both the hello and goodbye
> processes.
>
> - If there is only one context app. For example:
>
> mpirun -mca pls_rsh_debug 1 -np 4 hello
>
> will set pls_rsh_debug to 1 in both the orterun process and the 4
> spawned hello processes.
>
> Also added a few more comments inside orterun to document a somewhat
> confusing use of a state variable in a recursive case.

-- 
{+} Jeff Squyres
{+} The Open MPI Project
{+} http://www.open-mpi.org/