poor parallel speedup of openmp.org sample program: jacobi.f

[chris_hunter]

Hi,

I am trying to run the "jacobi.f" sample program provided on the openmp.org website:
http://www.openmp.org/drupal/samples/jacobi.html

I have not been able to achieve any kind of parallel speedup when I compile and run this program with intel fortran compiler for linux.

Has anyone had sucess with this program using intel fortran linux compiler ? Any explicit ode solver ?
What is necessary to achieve parallel speedup with the openmp "jacobi.f" sample program ?


My hardware:
Dell Poweredge 2950 w/ dual Xeon 5110 processors
2GB 667MHz ddr2 RAM

software:
redhat linux enterprise 4 UPD4 32bit:
2.6.9-42.0.2.ELhugemem #1 SMP Tue Aug 22 17:47:26 CDT 2006 i686 i686 i386 GNU/Linux

intel fortran 9.1.039 32bit compiler:
Intel Fortran Compiler for 32-bit applications, Version 9.1 Build 20060927Z Package ID: l_fc_c_9.1.039
Copyright (C) 1985-2006 Intel Corporation. All rights reserved.
FOR NON-COMMERCIAL USE ONLY

command-line:
ifort -O3 -xT -openmp -ipo jacobi.f


Thank-you in advance,

[Steven_L_Intel1]

What input values did you use? I'm not familiar with this application to know what to try.