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4.3 OMP_DYNAMIC 

The OMP_DYNAMIC environment variable enables or disables dynamic adjustment of the number of threads available for execution of parallel regions unless dynamic adjustment is explicitly enabled or disabled by calling the omp_set_dynamic library routine. Its value must be TRUE or FALSE.

If set to TRUE, the number of threads that are used for executing parallel regions may be adjusted by the runtime environment to best utilize system resources. If set to FALSE, dynamic adjustment is disabled. The default condition is implementation-defined.

Example:

setenv OMP_DYNAMIC TRUE

Cross References:

  • For more information on parallel regions, see Section 2.3 on page 8.

  • omp_set_dynamic function, see Section 3.1.7 on page 39.

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