Hello,
Does anyone have suggestions for the following situation:
We have parallelized a program with PVM in such a way that the same
executable can be used for stand-alone sequential runs as well as for
master-slave parallel runs. Now we are porting to MPI.
The application is started by a shell script with option -npart <xx>: number
of parts to be used in the decomposition.
if [ $npart -le 1 ]; then
program.exe
else
mpiexec -machinefile ... -n 1 master.exe < config
# --> master starts the appropriate number of instances of program.exe
fi
The problem is that calling MPI_Init in a sequential run kills the program
because LAM has not been booted.
How can we detect whether MPI is running within the program ?
This problem is similar to "detecting mpirun" on the archive of the
mailinglist. It is a slightly different scenario than the ones I found
there, so maybe there are different options.
Any thoughts ?
Thanks,
Edwin
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