sched_get_priority_max, sched_get_priority_min - get static priority range
sched_get_priority_max() returns the maximum
priority value that can be used with the scheduling algorithm identified
policy. sched_get_priority_min() returns
the minimum priority value that can be used with the scheduling
algorithm identified by
values are SCHED_FIFO, SCHED_RR,
SCHED_IDLE, and SCHED_DEADLINE.
Further details about these policies can be found in
Processes with numerically higher priority values are scheduled before processes with numerically lower priority values. Thus, the value returned by sched_get_priority_max() will be greater than the value returned by sched_get_priority_min().
Linux allows the static priority range 1 to 99 for the SCHED_FIFO and SCHED_RR policies, and the priority 0 for the remaining policies. Scheduling priority ranges for the various policies are not alterable.
The range of scheduling priorities may vary on other POSIX systems, thus it is a good idea for portable applications to use a virtual priority range and map it to the interval given by sched_get_priority_max() and sched_get_priority_min POSIX.1 requires a spread of at least 32 between the maximum and the minimum values for SCHED_FIFO and SCHED_RR.
policy does not identify a defined scheduling
This page is part of release 5.10 of the Linux
project. A description of the project, information about reporting bugs,
and the latest version of this page, can be found at