_POSIX_THREAD_SPORADIC_SERVER
This option does not add any interfaces of its own; it makes the SCHED_SPORADIC scheduling
policy and the sched_ss_* members of struct sched_param available to the scheduling
interfaces of
_POSIX_THREAD_PRIORITY_SCHEDULING.
Zephyr accepts SCHED_SPORADIC and validates the sporadic server parameters, but does not
enforce execution-time budgets: a thread scheduled under SCHED_SPORADIC executes as if
scheduled under SCHED_RR at sched_priority †. See
Sporadic Server Scheduling for details and rationale.
Enable this option with CONFIG_POSIX_THREAD_SPORADIC_SERVER, or enable the
XSI_ADVANCED_REALTIME_THREADS option
group with CONFIG_XSI_ADVANCED_REALTIME_THREADS.