I mean getenv("OMPI_MCA_apath") in setup_fork.
From: Dahai Guo via devel <[email protected]>
To: Jeff Squyres (jsquyres) <[email protected]>; Dahai Guo
<[email protected]>; Open MPI Developers List <[email protected]>
Cc: Dahai Guo <[email protected]>
Sent: Friday, February 24, 2017 9:11 AM
Subject: Re: [OMPI devel] define a new ENV variable in
etc/openmpi-mca-params.conf
oops, I should use the word "MCA parameters". If I define a MCA parameter
(apath, for example) in etc/openmpi-mca-params.conf, how can function
setup_fork in ompi/orte/mca/schizo/ompi/schizo_ompi.c get its value? I tried
to call getenv("apath") there, which return null.
However, If I defined it in the cmd line, mpirun -mca apath=sth .., then I
could get it in setup_fork.
Did I miss something?
Dahai
From: Jeff Squyres (jsquyres) <[email protected]>
To: Dahai Guo <[email protected]>; Open MPI Developers List
<[email protected]>
Cc: Dahai Guo <[email protected]>
Sent: Friday, February 24, 2017 8:57 AM
Subject: Re: [OMPI devel] define a new ENV variable in
etc/openmpi-mca-params.conf
On Feb 23, 2017, at 5:44 PM, Dahai Guo via devel <[email protected]>
wrote:
>
> If I define a new ENV variable in etc/openmpi-mca-params.conf, what OMPI
> codes should I modify in order for this parameter to be delivered to each
> rank?
I'm not quite sure what you're asking. The openmpi-mca-params.conf does not
define environment variables; it only sets values for Open MPI's MCA parameters
(i.e., run-time parameters).
If you want to pass environment variables from the environment of mpirun to the
MPI processes that it starts, use the -x CLI option to mpirun. For example:
export FOO=bar
mpirun -x FOO --host a,b -np 2 my_mpi_program
--
Jeff Squyres
[email protected]
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