FreeBSD/Linux Kernel Cross Reference
sys/sys/sched.h
1 /*-
2 * Copyright (c) 2002, Jeffrey Roberson <jeff@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/5.3/sys/sys/sched.h 136588 2004-10-16 08:43:07Z cvs2svn $
27 */
28
29 #ifndef _SYS_SCHED_H_
30 #define _SYS_SCHED_H_
31
32 /*
33 * General scheduling info.
34 *
35 * sched_load:
36 * Total runnable non-ithread threads in the system.
37 *
38 * sched_runnable:
39 * Runnable threads for this processor.
40 */
41 int sched_load(void);
42 int sched_rr_interval(void);
43 int sched_runnable(void);
44
45 /*
46 * Proc related scheduling hooks.
47 */
48 void sched_exit(struct proc *p, struct thread *childtd);
49 void sched_fork(struct thread *td, struct thread *childtd);
50
51 /*
52 * KSE Groups contain scheduling priority information. They record the
53 * behavior of groups of KSEs and threads.
54 */
55 void sched_class(struct ksegrp *kg, int class);
56 void sched_exit_ksegrp(struct ksegrp *kg, struct thread *childtd);
57 void sched_fork_ksegrp(struct thread *td, struct ksegrp *child);
58 void sched_nice(struct proc *p, int nice);
59
60 /*
61 * Threads are switched in and out, block on resources, have temporary
62 * priorities inherited from their ksegs, and use up cpu time.
63 */
64 void sched_exit_thread(struct thread *td, struct thread *child);
65 void sched_fork_thread(struct thread *td, struct thread *child);
66 fixpt_t sched_pctcpu(struct thread *td);
67 void sched_prio(struct thread *td, u_char prio);
68 void sched_sleep(struct thread *td);
69 void sched_switch(struct thread *td, struct thread *newtd, int flags);
70 void sched_userret(struct thread *td);
71 void sched_wakeup(struct thread *td);
72
73 /*
74 * Threads are moved on and off of run queues
75 */
76 void sched_add(struct thread *td, int flags);
77 void sched_clock(struct thread *td);
78 void sched_rem(struct thread *td);
79
80 /*
81 * Binding makes cpu affinity permanent while pinning is used to temporarily
82 * hold a thread on a particular CPU.
83 */
84 void sched_bind(struct thread *td, int cpu);
85 static __inline void sched_pin(void);
86 void sched_unbind(struct thread *td);
87 static __inline void sched_unpin(void);
88
89 /*
90 * These procedures tell the process data structure allocation code how
91 * many bytes to actually allocate.
92 */
93 int sched_sizeof_ksegrp(void);
94 int sched_sizeof_proc(void);
95 int sched_sizeof_thread(void);
96
97 static __inline void
98 sched_pin(void)
99 {
100 curthread->td_pinned++;
101 }
102
103 static __inline void
104 sched_unpin(void)
105 {
106 curthread->td_pinned--;
107 }
108
109 /* temporarily here */
110 void schedinit(void);
111 void sched_destroyproc(struct proc *p);
112 void sched_init_concurrency(struct ksegrp *kg);
113 void sched_set_concurrency(struct ksegrp *kg, int cuncurrency);
114 void sched_schedinit(void);
115 void sched_newproc(struct proc *p, struct ksegrp *kg, struct thread *td);
116 void sched_thread_exit(struct thread *td);
117 void sched_newthread(struct thread *td);
118 #endif /* !_SYS_SCHED_H_ */
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