1 .\" Copyright (C) Tom Bjorkholm & Markus Kuhn, 1996
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24 .\" 1996-04-01 Tom Bjorkholm <tomb@mydata.se>
25 .\" First version written
26 .\" 1996-04-10 Markus Kuhn <mskuhn@cip.informatik.uni-erlangen.de>
29 .TH SCHED_GET_PRIORITY_MAX 2 2014-05-12 "Linux" "Linux Programmer's Manual"
31 sched_get_priority_max, sched_get_priority_min \- get static priority range
35 .BI "int sched_get_priority_max(int " policy );
37 .BI "int sched_get_priority_min(int " policy );
39 .BR sched_get_priority_max ()
40 returns the maximum priority value that can be used with the
41 scheduling algorithm identified by
43 .BR sched_get_priority_min ()
44 returns the minimum priority value that can be used with the
45 scheduling algorithm identified by
57 Further details about these policies can be found in
60 Processes with numerically higher priority values are scheduled before
61 processes with numerically lower priority values.
64 .BR sched_get_priority_max ()
65 will be greater than the
67 .BR sched_get_priority_min ().
69 Linux allows the static priority range 1 to 99 for the
73 policies, and the priority 0 for the remaining policies.
74 Scheduling priority ranges for the various policies
77 The range of scheduling priorities may vary on other POSIX systems,
78 thus it is a good idea for portable applications to use a virtual
79 priority range and map it to the interval given by
80 .BR sched_get_priority_max ()
82 .BR sched_get_priority_min ().
83 POSIX.1-2001 requires a spread of at least 32 between the maximum and the
89 POSIX systems on which
90 .BR sched_get_priority_max ()
92 .BR sched_get_priority_min ()
94 .B _POSIX_PRIORITY_SCHEDULING
99 .BR sched_get_priority_max ()
101 .BR sched_get_priority_min ()
102 return the maximum/minimum priority value for the named scheduling
104 On error, \-1 is returned, and
106 is set appropriately.
112 does not identify a defined scheduling policy.
118 .BR sched_getaffinity (2),
119 .BR sched_getparam (2),
120 .BR sched_getscheduler (2),
121 .BR sched_setaffinity (2),
122 .BR sched_setparam (2),
123 .BR sched_setscheduler (2),
126 This page is part of release 3.79 of the Linux
129 A description of the project,
130 information about reporting bugs,
131 and the latest version of this page,
133 \%http://www.kernel.org/doc/man\-pages/.