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Subject: Re: [OMPI users] Running simple MPI program
From: David Zhang (solarbikedz_at_[hidden])
Date: 2010-10-23 00:59:42


since you said you're new to MPI, what command did you use to run the 2
processes?

On Fri, Oct 22, 2010 at 9:58 PM, David Zhang <solarbikedz_at_[hidden]> wrote:

> 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.
>>
>> _______________________________________________
>> users mailing list
>> users_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>
>
>
>
> --
> David Zhang
> University of California, San Diego
>

-- 
David Zhang
University of California, San Diego