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Subject: Re: [OMPI users] openmpi fails to terminate for errors/signals on some but not all processes
From: Laurence Marks (L-marks_at_[hidden])
Date: 2010-02-08 15:34:05


I goofed, openmpi does trap these errors but the system I tested them
on had a very sluggish response. However, and end-of-file is NOT
trapped.

On Mon, Feb 8, 2010 at 1:29 PM, Laurence Marks <L-marks_at_[hidden]> wrote:
> This was "Re: [OMPI users] Trapping fortran I/O errors leaving zombie
> mpi processes", but it is more severe than this.
>
> Sorry, but it appears that at least with ifort most run-time errors
> and signals will leave zombie processes behind with openmpi if they
> only occur on some of the processors and not all. You can test this
> with the attached using (for instance)
>
> mpicc -c doraise.c
> mpif90 -o crash_test crash_test.F doraise.o -FR -xHost -O3
>
> Then, as appropriate mpirun -np 8 crash_test
>
> The output is self explanatory, and has an option to both try and
> simulate common fortran problems as well as to send fortran or C
> signals to the process. Please note that the results can be dependent
> upon the level of optimization, and with other compilers there could
> be problems where the compiler complains about SIGSEV or other errors
> since the code deliberately tries to create these.
>
> --
> Laurence Marks
> Department of Materials Science and Engineering
> MSE Rm 2036 Cook Hall
> 2220 N Campus Drive
> Northwestern University
> Evanston, IL 60208, USA
> Tel: (847) 491-3996 Fax: (847) 491-7820
> email: L-marks at northwestern dot edu
> Web: www.numis.northwestern.edu
> Chair, Commission on Electron Crystallography of IUCR
> www.numis.northwestern.edu/
> Electron crystallography is the branch of science that uses electron
> scattering and imaging to study the structure of matter.
>

-- 
Laurence Marks
Department of Materials Science and Engineering
MSE Rm 2036 Cook Hall
2220 N Campus Drive
Northwestern University
Evanston, IL 60208, USA
Tel: (847) 491-3996 Fax: (847) 491-7820
email: L-marks at northwestern dot edu
Web: www.numis.northwestern.edu
Chair, Commission on Electron Crystallography of IUCR
www.numis.northwestern.edu/
Electron crystallography is the branch of science that uses electron
scattering and imaging to study the structure of matter.