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26 .Dt SCHED_GET_PRIORITY_MAX 2
29 .Nm sched_get_priority_max ,
30 .Nm sched_get_priority_min ,
31 .Nm sched_rr_get_interval
32 .Nd get scheduling parameter limits
38 .Fn sched_get_priority_max "int policy"
40 .Fn sched_get_priority_min "int policy"
42 .Fn sched_rr_get_interval "pid_t pid" "struct timespec *interval"
45 .Fn sched_get_priority_max
47 .Fn sched_get_priority_min
48 system calls return the appropriate maximum or minimum, respectively,
49 for the scheduling policy specified by
52 .Fn sched_rr_get_interval
53 system call updates the
55 structure referenced by the
57 argument to contain the current execution time limit (i.e., time
58 quantum) for the process specified by
62 is zero, the current execution time limit for the calling process is
67 should be one of the scheduling policy values defined in
69 .Bl -tag -width [SCHED_OTHER]
71 First-in-first-out fixed priority scheduling with no round robin scheduling;
73 The standard time sharing scheduler;
75 Round-robin scheduling across same priority processes.
79 .Fn sched_get_priority_max
81 .Fn sched_get_priority_min
82 system calls shall return the appropriate maximum or minimum values,
84 If unsuccessful, they shall return a value of -1 and set
86 to indicate the error.
88 .Rv -std sched_rr_get_interval
92 will be set to the corresponding value:
97 argument does not represent a defined scheduling policy.
100 .Fn sched_get_priority_max ,
101 .Fn sched_get_priority_min ,
103 .Fn sched_rr_get_interval
104 system calls are not supported by the implementation.
106 No process can be found corresponding to that specified by
110 .Xr sched_getparam 2 ,
111 .Xr sched_getscheduler 2 ,
112 .Xr sched_setparam 2 ,
113 .Xr sched_setscheduler 2
116 .Fn sched_get_priority_max ,
117 .Fn sched_get_priority_min ,
119 .Fn sched_rr_get_interval
120 system calls conform to