[OMPI users] mpirun links wrong library with BLACS tester

I have installed openmpi 1.4.1 locally for one user on a cluster, where some other mpi were installed. when I try to run an executable through mpirun (I am running the BLACS tester) I get xFbtest_MPI-LINUX-0: error while loading shared libraries: liblam.so. 0: cannot open shared object file:

Re: [OMPI users] How to start MPI_Spawn child processes early?

My question is why? If you are willing to reserve a chunk of your machine for yet-to-exist tasks, why not just create them all at mpirun time and slice and dice your communicators as appropriate? On Thu, 2010-01-28 at 09:24 +1100, Jaison Paul wrote: > Hi, I am just reposting my early query once

[OMPI users] Non-homogeneous Cluster Implementation

OK, so please stop me if you have heard this before, but I couldn’t find anything in the archives that addressed my situation. I have a Beowulf cluster where ALL the node are PS3s running Yellow Dog Linux 6.2 and a host (server) that is a Dell i686 Quad-core running Fedora Core 12. After a fail

Re: [OMPI users] How to start MPI_Spawn child processes early?

It sounds to me a bit like asking to be born before your mother. Unless I misunderstand the question... Douglas. On Thu, Jan 28, 2010 at 09:24:29AM +1100, Jaison Paul wrote: > Hi, I am just reposting my early query once again. If anyone one can > give some hint, that would be great. > > Thanks,

Re: [OMPI users] How to start MPI_Spawn child processes early?

I cannot resist: Jaison - The MPI_Comm_spawn call specifies what you want to have happen. The child launch is what does happen. If we can come up with a way to have things happen correctly before we know what it is that we want to have happen, the heck with this HPC stuff. Lets get together and

Re: [OMPI users] How to start MPI_Spawn child processes early?

I can't imagine how you would do that - only thing I can think of would be to start your "child" processes as one job, then start your "parent" processes and have them do an MPI_Comm_join with the child job. That said, I can't imagine that comm_spawn is -that- slow to make much difference to an

Re: [OMPI users] How to start MPI_Spawn child processes early?

Hi, I am just reposting my early query once again. If anyone one can give some hint, that would be great. Thanks, Jaison ANU Jaison Paul wrote: Hi All, I am trying to use MPI for scientific High Performance (hpc) applications. I use MPI_Spawn to create child processes. Is there a way to sta

Re: [OMPI users] How to check OMPI is using IB or not?

You could also rule Ethernet (TCP) out. E.g., mpirun --mca btl self,openib ./a.out Or, if you wanted the opposite (Ethernet/TCP, but not IB), then mpirun --mca btl self,tcp ./a.out If an infiniband network is configured successfully, how to confirm that Open MPI is using infiniband, not othe

Re: [OMPI users] How to check OMPI is using IB or not?

Thanks Brett for the useful information. On Wed, Jan 27, 2010 at 12:40 PM, Brett Pemberton wrote: > > - "Sangamesh B" wrote: > > > Hi all, > > > > If an infiniband network is configured successfully, how to confirm > > that Open MPI is using infiniband, not other ethernet network > > availa

Re: [OMPI users] How to check OMPI is using IB or not?

- "Sangamesh B" wrote: > Hi all, > > If an infiniband network is configured successfully, how to confirm > that Open MPI is using infiniband, not other ethernet network > available? > At a low level simplistic way, how about: [root@tango003 ~]# lsof | grep /dev/infiniband namd2 7271

[OMPI users] How to check OMPI is using IB or not?

Hi all, If an infiniband network is configured successfully, how to confirm that Open MPI is using infiniband, not other ethernet network available? In earlier versions, I've seen if OMPI is running on ethernet, it was giving warning - its runnig on slower network. Is this available in 1.3