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sched.h(3head)
sched.h(3HEAD) Headers sched.h(3HEAD)
NAME
sched.h, sched - execution scheduling
SYNOPSIS
#include <sched.h>
DESCRIPTION
The <sched.h> header defines the sched_param structure, which contains
the scheduling parameters required for implementation of each supported
scheduling policy. This structure contains the following member:
int sched_priority process execution scheduling priority
Each process is controlled by an associated scheduling policy and pri‐
ority. Associated with each policy is a priority range. Each policy
definition specifies the minimum priority range for that policy. The
priority ranges for each policy may overlap the priority ranges of
other policies.
The scheduling policies are indicated by the values of the following
symbolic constants:
SCHED_OTHER Processes are scheduled according to the traditional
Time-Sharing Class (TS) policy as described in prioc‐
ntl(2).
SCHED_FIFO Processes are scheduled in the Real-Time (RT) scheduling
class, according to the First-In-First-Out (FIFO) pol‐
icy. Processes scheduled to this policy, if not pre‐
empted by a higher priority or interrupted by a signal,
will proceed until completion.
SCHED_RR Processes are scheduled in the Real-Time (RT) scheduling
class, according to the Round-Robin (RR) policy. Pro‐
cesses scheduled to this policy, if not preempted by a
higher priority or interrupted by a signal, will execute
for a time period, returned by sched_rr_get_interval(3C)
or by the system.
SCHED_IA Processes are scheduled according to the Inter-Active
Class (IA) policy as described in priocntl(2).
SCHED_FSS Processes are scheduled according to the Fair-Share
Class (FSS) policy as described in priocntl(2).
SCHED_FX Processes are scheduled according to the Fixed-Priority
Class (FX) policy as described in priocntl(2).
The values of these constants are distinct.
Inclusion of the <sched.h> header will make visible symbols defined in
the header <time.h>.
SEE ALSO
priocntl(2), sched_get_priority_max(3C), sched_get_priority_min(3C),
sched_rr_get_interval(3C), time.h(3HEAD)
Oracle Solaris 11.4 1 Apr 2008 sched.h(3HEAD)