[ofa-general] OFED-1.1, mvapich and openmpi question
jsquyres at cisco.com
Fri Mar 9 07:44:38 PST 2007
On Mar 9, 2007, at 10:32 AM, Bala wrote:
> Recently we have installed OFED-1.1 on our
> 16 node blade cluster, as we are new to IB we
> have the following queries
> 1. For openmpi we have used the "--mca btl openib,self
> ..." as command line option and it is
> running fine, now the question is how to make sure
> the it uses IB for mpi communication??
This parameter tells Open MPI to only use the "openib" and "self"
plugins for MPI communications. The "openib" plugin uses the
OpenFabrics stack; the "self" plugin is used for loopback (send-to-
self) communication. If you want to use shared memory for on-host
communication, add "sm" into the list:
--mca btl sm,openib,self
See http://www.open-mpi.org/faq/ for more information.
> 2. Is there any tool available to find activity over
I think Hal answered that.
> 3. Is there any option available for "mvapich" to use
The MVAPICH guys will have to answer that.
> 4. we are using cpi.c sample is there any other
> sample we can use for testing as well as benchmark??
There's lots of other benchmarks out there; I personally like NetPIPE
as a ping-pong test, but OSU has some benchmarks as well.
> 5. shall we use this with SGE(Sun Grid Engine)
> scheduler??, anybody already using SGE for
> openmpi and mvapich??
Open MPI v1.2 debuts support for SGE, but also supports a variety of
other schedulers (Torque, SLURM, ...etc.).
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