[Beowulf] fftw2, mpi, from 32 bit to 64 and fortran

Gus Correa gus at ldeo.columbia.edu
Fri Aug 1 17:25:34 EDT 2008


Ricardo Reis

Would  you have used a 32-bit fftw library when you linked the program?
I made this mistake this before.

Both the 32- and 64-bit versions are installed on my Fedora Core 8  
64-bit machine.
32-bit in /usr/lib/
64-bit in /usr/lib64/

Would it be this the reason for the segmentation fault?

Como dizia o  A'lvaro de Campos,  coitado,
a compilac,a~o e' um comi'cio dentro da alma.  :)

Gus Correa

-- 
---------------------------------------------------------------------
Gustavo J. Ponce Correa, PhD - Email: gus at ldeo.columbia.edu
Lamont-Doherty Earth Observatory - Columbia University
P.O. Box 1000 [61 Route 9W] - Palisades, NY, 10964-8000 - USA
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Ricardo Reis wrote:

>
>  which means... segfault.
>
>  Hi all
>
>  I've scourged the net for answers to no avail and the fftw project 
> seems to have grinded to a halt. Maybe someone has had this problem 
> and can throw some light.
>
>  I've coded a small program that reads a vorticity field, uses FFTW2 
> to send it from the physical to the spectral space and then computes 
> its energy spectrum. Everything works in my laptop (32 bit, Linux), 
> serial, threaded and mpi (using openmpi). In a 64 bit machine the mpi 
> version kaputs. Any thoughts?
>
>
>
>  Ricardo Reis
>
>  'Non Serviam'
>
>  PhD student @ Lasef
>  Computational Fluid Dynamics, High Performance Computing, Turbulence
>  http://www.lasef.ist.utl.pt
>
>  &
>
>  Cultural Instigator @ Rádio Zero
>  http://www.radiozero.pt
>
>  http://www.flickr.com/photos/rrei
> s/
>
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