Using OpenMP
You can use Omni OpenMP a free,
portable OpenMP implementation for C.
Compile, and run
The command to compile OpenMP C programs is omcc, located at /local/amza/omnimp/bin
on the Linux machines (magenta, etc). However, as you know, the Linux machines
are uniprocessor machines. If you would like to install Omni OpenMP on a
different platform, please download the Omni OpenMP code from Omni OpenMP
and install it yourselves. For your convenience you can find the tar file of the
download also in /local/amza/omnimp.tar on the Linux machines.
To run the OpenMP program, just execute the compiled
executable on your platform. The number of processor (or operating system
threads) used is controlled by either setenv
OMPC_NUM_PROCS 4 or export OMPC_NUM_PROCS=4,
depending on which shell you use.
One useful omcc flag is -X. It generates tmp.c, a multithread program translated
from OpenMP. The name of all parallel functions generated by the compiler
starts with __ompc_func.
Examples
Some OpenMP examples for the applications we have been using, including
Molecular Dynamics (md) are on the web page under Programming Assignments.