OMP_DISPLAY_ENV

When a program that uses the OpenMP runtime is invoked and the OMP_DISPLAY_ENV environment variable is set, the OpenMP runtime library displays the values of the internal control variables (ICVs) associated with the environment variables and the build-specific information about the runtime library.

OMP_DISPLAY_ENV is useful in the following cases:

• When the runtime library is statically linked with an OpenMP program, you can use OMP_DISPLAY_ENV to check the version of the library that is used during link time.
• When the runtime library is dynamically linked with an OpenMP program, you can use OMP_DISPLAY_ENV to check the library that is used at run time.
• You can use OMP_DISPLAY_ENV to check the current setting of the runtime environment.

By default, no information is displayed.

The syntax of this environment variable is as follows:

>>-OMP_DISPLAY_ENV--=--+-TRUE----+-----------------------------><
                       +-FALSE---+   
                       '-VERBOSE-'   

TRUE

Displays the OpenMP version number defined by the _OPENMP macro and the initial ICV values for the OpenMP environment variables.

FALSE

Instructs the runtime environment not to display any information.

VERBOSE

Displays build-specific information, ICV values associated with OpenMP environment variables, and the setting of the XLSMPOPTS environment variable.

OPENMP DISPLAY ENVIRONMENT BEGIN
  OMP_DISPLAY_ENV='TRUE'

  _OPENMP='201107'
  OMP_DYNAMIC='FALSE'
  OMP_MAX_ACTIVE_LEVELS='5'
  OMP_NESTED='FALSE'
  OMP_NUM_THREADS='96'
  OMP_PROC_BIND='FALSE'
  OMP_SCHEDULE='STATIC,0'
  OMP_STACKSIZE='4194304'
  OMP_THREAD_LIMIT='96'
  OMP_WAIT_POLICY='PASSIVE'
OPENMP DISPLAY ENVIRONMENT END