Dear Ralph
On Aug 21, 2014, at 2:30 PM, Ralph Castain <r...@open-mpi.org> wrote:
> I'm afraid that none of the mapping or binding options would be available
> under srun as those only work via mpirun. You can pass MCA params in the
> environment of course, or in default MCA param files.
I understand. I hopefully be able to still pass the LAMA mca options as
environment variables....I fear by default srun completely takes over the
process binding.
I got another problem. On my cluster I have two GPU and two Ivy Bridge
processors. To maximize the PCIe bandwidth I want to allocate GPU 0 to socket 0
and GPU 1 to socket 1. I use a script like this
#!/bin/bash
lrank=$OMPI_COMM_WORLD_LOCAL_RANK
case ${lrank} in
0)
export CUDA_VISIBLE_DEVICES=0
"$@"
;;
1)
export CUDA_VISIBLE_DEVICES=1
"$@"
;;
esac
But OMP_COMM_WORLD_LOCAL_RANK is not defined is I use srun with PMI2 as
luncher. Is there any equivalent option/environment variable that will help me
achieve the same result?
Thanks in advance!
F
--
Mr. Filippo SPIGA, M.Sc.
http://filippospiga.info ~ skype: filippo.spiga
«Nobody will drive us out of Cantor's paradise.» ~ David Hilbert
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