Hello all,
Any ideas?
--
Parag Kalra
On Jan 10, 2008 4:15 AM, Parag Kalra wrote:
> Hello all,
>
> I am using Open MPI with Infiniband configured.
>
> What should be the ideal MTU size for infiniband?
>
> --
> PARAG . A . KALRA
>
>
>
>
On Jan 9, 2008, at 3:50 PM, Warner Yuen wrote:
Thanks to Brian Barrett, I was able to get through some ugly Intel
compiler bugs during the configure script. I now have OMPI v1.2.5
running nicely under Mac OSX v10.5 Leopard!
Excellent!
However, I have a question about hostfiles. I would lik
On Thu, Jan 10, 2008 at 06:23:50PM +0530, Parag Kalra wrote:
> Hello all,
>
> Any ideas?
Yes. The idea is that Open MPI knows what best. Run it with a default
value. Usually bigger MTU is better, but some HW has bugs. Open MPI
knows this and choses the best value for your HW.
>
> --
> Parag Kalr
But still can someone please tell the numerical value that is idealy set or
should be set.
On Jan 10, 2008 8:29 PM, Gleb Natapov wrote:
> On Thu, Jan 10, 2008 at 06:23:50PM +0530, Parag Kalra wrote:
> > Hello all,
> >
> > Any ideas?
> Yes. The idea is that Open MPI knows what best. Run it with a
We just updated rhel4 a few days back and now we get the following
errors when trying to run on infiniband nodes with openmpi-1.2.3 and
openmpi-1.2.0
[0,1,1]: OpenIB on host nyx397 was unable to find any HCAs.
Another transport will be used instead, although this may result in
lower performan
This can mean that you have a user-level libibverbs and kernel mismatch.
Do any of the OFED sample programs work properly, or perhaps the
ibv_devinfo program? (ibv_devinfo should query the HCAs on your host
and list the status of all the ports)
On Jan 10, 2008, at 2:33 PM, Brock Palen wr
Hi Warner. The simplest way would certainly be to launch your job with
with the mpirun --nolocal option. If you're sure you want a
hostfile-based way to set this, simply removing the headnode from the
hostfile would also work.
--
--Kris
叶ってしまう夢は本当の夢と言えん。
[A dream that comes true can't really be
In an Open MPI installation, have a look in $prefix/share/openmpi/mca-
btl-openib-hca-params.ini, find your HCA hardware, and you'll see what
value Open MPI sets the MTU to.
Hope that helps.
On Jan 10, 2008, at 1:56 PM, Parag Kalra wrote:
But still can someone please tell the numerical valu
