======= Quick tutorial for doing the OpenMP ORAC performance tests.

Prerequisites

* 4-cores (or more) machine 
* fftw libraries 
* empty machine (no other CPU consuming program running while testing)
* Intel ifort compiler 

====== Basic instruction 

1) copy the  the config.H into the ../../src DIR 
2) cd into ../../src and do the OMP target:

   $ ./configure -fftw -Intel -OMP
   $  make

3) cd back in ../tests/omp_tests and do the tests:

   $ ./omp_timing.bash FILENAME 2 2 
 

====  input FILENAME can be :

2a.in (90000 atoms)
2b.in (30000 atoms)
2c.in (5000 atoms)
2d.in (1500 atoms)

===  OUTPUTS 

Timing output are in the files:  TIMES.$FILENAME.2.2.fftw_Intel_OMP.$CPU 

where $FILENAME is the input file and $CPU is taken from the /proc/cpuinfo file.
