Re: [OMPI users] mpi problems,

As one of the error message suggests, you need to add the openmpi library to your LD_LIBRARY_PATH to all your nodes. On Wed, Mar 30, 2011 at 1:24 PM, Nehemiah Dacres wrote: > I am trying to figure out why my jobs aren't getting distributed and need > some help. I have an

[OMPI users] mpi problems,

I am trying to figure out why my jobs aren't getting distributed and need some help. I have an install of sun cluster tools on Rockscluster 5.2 (essentially centos4u2). this user's account has its home dir shared via nfs. I am getting some strange errors. here's an example run [jian@therock ~]$

Re: [OMPI users] Shared Memory Performance Problem.

On 3/30/2011 10:08 AM, Eugene Loh wrote: Michele Marena wrote: I've launched my app with mpiP both when two processes are on different node and when two processes are on the same node. The process 0 is the manager (gathers the results only), processes 1 and 2 are workers (compute). This is

Re: [OMPI users] Shared Memory Performance Problem.

Michele Marena wrote: I've launched my app with mpiP both when two processes are on different node and when two processes are on the same node. The process 0 is the manager (gathers the results only), processes 1 and 2 are  workers (compute). This is the case processes 1 and 2

Re: [OMPI users] Shared Memory Performance Problem.

Hi Jeff, I thank you for your help, I've launched my app with mpiP both when two processes are on different node and when two processes are on the same node. The process 0 is the manager (gathers the results only), processes 1 and 2 are workers (compute). This is the case processes 1 and 2 are

[OMPI users] Fault tolerant ompi - Error: Unable to find a list of active MPIRUN processes on this machine.

Hi I'm trying to get fault tolerant ompi running on our cluster for my semesterthesis. On the login node i was successful, checkpointing works. Since the compute nodes have different kernels, i had to compile blcr on the compute nodes again. blcr on the compute nodes works. after that i

Re: [OMPI users] OpenMPI-PGI: /usr/bin/ld: Warning: size of symbol `#' changed from # in #.o to # in #.so

When I have seen this problem before, it *usually* indicated a mismatch of Open MPI versions that were not ABI compatible. I.e., the application was compiled and linked against Open MPI version X, but then at run time, it found the shared libraries for Open MPI version Y -- and X is not ABI

Re: [OMPI users] Shared Memory Performance Problem.

How many messages are you sending, and how large are they? I.e., if your message passing is tiny, then the network transport may not be the bottleneck here. On Mar 28, 2011, at 9:41 AM, Michele Marena wrote: > I run ompi_info --param btl sm and this is the output > > MCA

Re: [OMPI users] help with hybrid openmp and mpi

If you have OpenMP questions, you might want to direct those to a different list and/or check the relevant compiler documentation; this list is for Open MPI support. Good luck. On Mar 29, 2011, at 5:26 PM, job hunter wrote: > hi all, > mpiCC -openmp test.c -o test . I fixed the error

Re: [OMPI users] printf and scanf problem of C code compiled with Open MPI

I don't remember this being a function of the C language or the compiler; I'm pretty sure you can change whether stdout is line buffered or not at the OS level. As for OMPI, we deliberately set each MPI process' stdout to be line buffered before relaying it up to the mpirun process. This was

Re: [OMPI users] printf and scanf problem of C code compiled with Open MPI

You remind me. I now realize that it is not an matter of compiler, but an issue of C language. The printf() function in C doesn't print messages onto the standard ouput immediately, but instead stores them in a buffer. Only in some cases does the standard output work, defined in standard C: 1.

Re: [OMPI users] printf and scanf problem of C code compiled with Open MPI

Maybe this could solve your problem: Just add \n in the string you want to display: printf("Please give N= \n"); Of course, this will return, but the string is displayed. This run by me without the fflush(). On the other hand, do you really observe that the time of the scanf () and the time