[Beowulf] debugging

[Joe Landman]

Matt Funk wrote:

> Does anyone have any advice? I am open to try out other things as well if 
> possible. I am just starting to learn debugger techniques for a parallel 
> program.

Core dumps are your friends (though most linux distros turn them off by 
default now).  That and compiling your code with symbols, and debugging 
enabled.  I rather enjoy (ok, I really don't) pulling up crashed 
binaries, loading up the core, and walking the stack backwards to see 
the real reason for the crash.

Oddly enough I am doing that now for an MPI code (sigh).

> 
> thanks
> mat
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Joseph Landman, Ph.D
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