[Beowulf] MPICH Exporting environment variables.

William Gropp gropp at mcs.anl.gov
Tue Mar 16 15:14:58 EST 2004


At 05:09 PM 3/15/2004, Balaji Rangasamy wrote:
>Hi,
>Has anyone successfully exported any environment variables (specifically
>LD_PRELOAD) in MPICH? There is an easy way to do this with LAM/MPI; there
>is this -x switch in mpirun command that comes with LAM/MPI that will
>export the environment variable you specify to all the child processes. Is
>there any easy way to do this in MPICH?

It depends on the process manager/startup system that you are using with 
MPICH.  With the "p4 secure server", environment variables can be 
exported.  With the default ch_p4 device, environment variables are not 
exported.  Under MPICH2, most process managers export the environment to 
the user processes.

Bill 

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