The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.
The gcc and Oracle Solaris Studio compilers can look for OpenMP
pragma directives in the source code in order to build a parallel version
of the application. Similar to automatic parallelization, the compiler does the additional
work so that you do not have to manage the threads. OpenMP represents an incremental approach
to parallelization with potentially fine granularity. OpenMP allows you to set directives
around specific loops to be optimized through threading while leaving other loops untouched.
The advantage of this approach is that you can derive a serial version and a parallel version
of the application from the same code, which can be helpful for debugging.
To instruct the gcc compiler to recognize OpenMP directives, specify the -fopenmp flag.
Several compiler flags are available in Oracle Solaris Studio to support OpenMP. To instruct the compiler to recognize OpenMP directives, specify the -xopenmp flag. You can also set the -xvpara flag to report potential parallelization issues, and the -loopinfo flag to display information about which loops are parallelized.
At run time, set the OMP_NUM_THREADS environment variable to specify
the number of processors that are available to the program.