On 12/10/2010 03:24 PM, David Mathog wrote:
Ashley Pittman wrote:

For a much simpler approach you could also use these two environment
variables, this is on my current system which is 1.5 based, YMMV of course.
OMPI_COMM_WORLD_LOCAL_RANK
OMPI_COMM_WORLD_LOCAL_SIZE

    
However that doesn't really tell you which MPI_COMM_WORLD ranks are on the same node as you I believe.

--td
That is simpler.  It works on OMPI 1.4.3 too:

cat >/usr/common/bin/dumpev.sh <<EOD
#!/bin/bash
set
EOD
mpirun -np 4 --host monkey01 --mca plm_rsh_agent rsh
/usr/common/bin/dumpenv.sh | grep LOCAL_RANK
OMPI_COMM_WORLD_LOCAL_RANK=0
OMPI_COMM_WORLD_LOCAL_RANK=1
OMPI_COMM_WORLD_LOCAL_RANK=2
OMPI_COMM_WORLD_LOCAL_RANK=3

Thanks,

David Mathog
mathog@caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech
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