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Subject: Re: [OMPI users] could oversubscription clobber an executable?
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2009-05-14 12:31:55

On May 14, 2009, at 10:11 AM, Valmor de Almeida wrote:

> > This sounds like memory badness is occurring somewhere in your
> > application which eventually corrupts things to make them stop
> working
> > (e.g., writing beyond the end of arrays, etc.). Have you run your
> app
> > through a memory-checking debugger, perchance?
> >
> I have the compiler flag for array bounds checking turned on. Is this
> sufficient?

Probably not; there are many different kinds of memory corruption.

> I have not used a debugger for this purpose. Would gdb do it with mpi?

Try valgrind.

Jeff Squyres
Cisco Systems