OpenMP is a standard for parallel programming on shared-memory systems, including multicore systems. It consists primarily of a set of compiler directives for sharing work among multiple threads. OpenMP is supported by all the Fortran, C, and C++ compilers installed on OSC systems.
OpenMP is available without restriction to all OSC users. It is supported by the Intel, PGI, and gnu compilers.
Note: Some of the older compiler versions available on Glenn may not support OpenMP.
OpenMP support is built into the compilers. There is no separate module to load.
To build a program with OpenMP, use the compiler flag appropriate to your compiler. The correct libraries are included implicitly.
An OpenMP program by default will use a number of threads equal to the number of processor cores available. To use a different number of threads, set the environment variable OMP_NUM_THREADS.