The OMP_SCHEDULE environment variable controls the schedule kind and chunk size of all loop directives that have the schedule kind runtime, by setting the value of the run-sched-var ICV.
The value of this environment variable takes the form:
If the modifier is not present, the modifier is set to monotonic if kind is static; for any other kind it is set to nonmonotonic.
If chunk is present, white space may be on either side of the “,”. See Section 2.11.4 for a detailed description of the schedule kinds.
The behavior of the program is implementation defined if the value of OMP_SCHEDULE does not conform to the above format.
setenv OMP_SCHEDULE "guided,4"
setenv OMP_SCHEDULE "dynamic"
setenv OMP_SCHEDULE "nonmonotonic:dynamic,4"