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Subject: Re: [OMPI users] Handling output of processes
From: Gijsbert Wiesenekker (gijsbert.wiesenekker_at_[hidden])
Date: 2009-01-23 14:19:49


jody wrote:
> Hi
> I have a small cluster consisting of 9 computers (8x2 CPUs, 1x4 CPUs).
> I would like to be able to observe the output of the processes
> separately during an mpirun.
>
> What i currently do is to apply the mpirun to a shell script which
> opens a xterm for each process,
> which then starts the actual application.
>
> This works, but is a bit complicated, e.g. finding the window you're
> interested in among 19 others.
>
> So i was wondering is there a possibility to capture the processes'
> outputs separately, so
> i can make an application in which i can switch between the different
> processor outputs?
> I could imagine that could be done by wrapper applications which
> redirect the output over a TCP
> socket to a server application.
>
> But perhaps there is an easier way, or something like this alread does exist?
>
> Thank You
> Jody
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>
>
For C I use a printf wrapper function that writes the output to a
logfile. I derive the name of the logfile from the mpi_id. It prefixes
the lines with a time-stamp, so you also get some basic profile
information. I can send you the source code if you like.

Regards,
Gijsbert