Word description t if the input scheduling policy can be used with a non-zero static priority, f otherwise. This word allows a platform's real-time policies to be distinguished from normal scheduling policies.
Depending on platform, normal scheduling policies (such as SCHED_OTHER, SCHED_BATCH, and SCHED_IDLE) must be used with a static scheduling priority of 0. Similarly, the real-time policies must be used with a non-zero priority, within the range found by policy-priority-range.
Examples
USE: unix.scheduler
SCHED_OTHER priority-allowed? . f
USE: unix.scheduler
SCHED_FIFO priority-allowed? . t