PETSC debugger

[Ryan Yan]

Thank you very much, Jed.

I will try your suggestion.

Yan

On Mon, Jul 20, 2009 at 5:47 AM, Jed Brown <jed at 59a2.org> wrote:

> Ryan Yan wrote:
> > Only debugging one processes is a way to go for my current bug(s).
>
> There is another option for debugging multiple processes using screen
> instead of X.  For the sake of cleanliness, start a new terminal and
> open a special screen session for debugging
>
> $ screen -S sdebug
>
> Now in your original terminal, run the program like
>
> $ mpirun -n 4 ./myapp -start_in_debugger -debug_terminal "screen -S sdebug
> -X screen"
>
> (the quotes are important)
>
> This opens four new windows within the screen session named "sdebug".
>
>
> Recent versions of MPICH2 have a -gdb option which is a lightweight skin
> for gdb that sends commands to all processes and collates the results,
> but also allows you to drop to per-process debugging.  I had trouble
> with it prior to release 1.1.
>
>
> Jed
>
>
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