[ofa-general] infiniband problem, no NICs
cap at nsc.liu.se
Mon Nov 24 10:16:55 PST 2008
On Sunday 23 November 2008, Or Gerlitz wrote:
> Michael Oevermann wrote:
> > However, when I directly start a mpi job (without using a scheduler) via:
> > /usr/mpi/gcc4/openmpi-1.2.2-1/bin/mpirun -np 4 -hostfile
> > /home/sysgen/infiniband-mpi-test/machine/usr/mpi/gcc4/openmpi-1.2.2-1/tes
> > I get the error message:
> > 0,1,0]: uDAPL on host n01 was unable to find any NICs...
> The BTL you are working with uses a library named udapl and this library
> relies on the IPoIB (IP over Infiniband) NICs (e.g ib0, ib1) existence.
> Assuming these nics are not configured on your system, you can either
> configure them (modprobe ib_ipoib / ifconfig ib0 x.y.z.w) or use a verb
> (native IB access layer) BTL which does not reply on operative ipoib.
Using verbs is the way to go. OpenMPI, afaik, does not recommend the udapl
btl. I would recommend checking for the btl "openib" which is the verbs btl.
If it does not exist rebuild OpenMPI (you will need libibverbs-devel).
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