[mpich-discuss] MPICH issue when running jobs in background

[Kenneth Raffenetti]

Hi,

I created bug 2274 for this issue.

http://trac.mpich.org/projects/mpich/ticket/2274

Ken

On 06/08/2015 11:04 PM, Roy, Hirak wrote:
> Dear MPICH team,
>
> Waiting for your response.
>
> Thanks,
>
> Hirak
>
> *From:*Roy, Hirak
> *Sent:* Tuesday, June 02, 2015 1:08 PM
> *To:* discuss at mpich.org
> *Subject:* MPICH issue when running jobs in background
>
> Hi Team,
>
> I am using MPICH 3.0.4.
>
> My top level script invokes a ‘batch script’ in background and then runs
> my mpi-program using mpiexec.
>
> I run this top-level script in background mode ( please check details
> later).
>
> It seems once I invoke the mpiexec, my batch-script execution is suspended.
>
> I tried OpenMPI and they do not have the issue.
>
> I have attached 3 files.
>
> 1>run.sh : run script to run the top-level program
>
> 2>background.sh : invoked from run.sh as a background job. Just prints
> something on a while loop
>
> 3>myprog.c : simple MPI program which just waits on a loop
>
> Compile step : mpicc myprog.c à a.out
>
> #! /bin/bash
>
> ./background.sh &
>
> mpiexec  -n 1 ./a.out
>
> To reproduce :
>
> *Shell >> ./run.sh &*
>
> *Shell >> jobs*
>
> *[1]  + Suspended (tty input)         ./run.sh*
>
> Here the background.sh is suspended. However,  a.out keeps running.
>
> If I change the script so that mpiexec takes input from /dev/null, then
> the issue is resolved.
>
> #! /bin/bash
>
> ./background.sh &
>
> mpiexec  -n 1 ./a.out *< /dev/null*
>
> It seems to be a MPICH specific issue.
>
> Could you please have a look and file a bug for this.
>
> Thanks,
>
> Hirak
>
>
>
> _______________________________________________
> discuss mailing list     discuss at mpich.org
> To manage subscription options or unsubscribe:
> https://lists.mpich.org/mailman/listinfo/discuss
>
_______________________________________________
discuss mailing list     discuss at mpich.org
To manage subscription options or unsubscribe:
https://lists.mpich.org/mailman/listinfo/discuss