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Subject: Re: [OMPI users] Running simple MPI program
From: David Zhang (solarbikedz_at_[hidden])
Date: 2010-10-23 00:58:33


your code works on mine machine. could be they way you build mpi.

On Fri, Oct 22, 2010 at 7:26 PM, Brandon Fulcher <minguo_at_[hidden]> wrote:

> Hi, I am completely new to MPI and am having trouble running a job between
> two cpus.
>
> The same thing happens no matter what MPI job I try to run, but here is a
> simple 'hello world' style program I am trying to run.
>
> #include <mpi.h>
> #include <stdio.h>
>
> int main(int argc, char **argv)
> {
> int *buf, i, rank, nints, len;
> char hostname[256];
>
> MPI_Init(&argc,&argv);
> MPI_Comm_rank(MPI_COMM_WORLD, &rank);
> gethostname(hostname,255);
> printf("Hello world! I am process number: %d on host %s\n", rank,
> hostname);
> MPI_Finalize();
> return 0;
> }
>
>
> On either CPU, I can successfully compile and run, but when trying to run
> the program using two CPUS it fails with this output:
>
> --------------------------------------------------------------------------
> mpirun noticed that the job aborted, but has no info as to the process
> that caused that situation.
> --------------------------------------------------------------------------
>
>
> With no additional information or errors, What can I do to go about
> finding out what is wrong?
>
>
>
> I have read the FAQ and followed the instructions. I can ssh into the
> slave without entering a password and have the libraries installed on both
> machines.
>
> The only thing pertinent I could find is this faq
> http://www.open-mpi.org/faq/?category=running#missing-prereqs but I do
> not know if it applies since I have installed open mpi from the Ubuntu
> repositories and assume the libraries are correctly set.
>
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>

-- 
David Zhang
University of California, San Diego