ad1e7d285a
Make part of John Birrell's KSE patch permanent.. Specifically, remove: Any reference of the ksegrp structure. This feature was never fully utilised and made things overly complicated. All code in the scheduler that tried to make threaded programs fair to unthreaded programs. Libpthread processes will already do this to some extent and libthr processes already disable it. Also: Since this makes such a big change to the scheduler(s), take the opportunity to rename some structures and elements that had to be moved anyhow. This makes the code a lot more readable. The ULE scheduler compiles again but I have no idea if it works. The 4bsd scheduler still reqires a little cleaning and some functions that now do ALMOST nothing will go away, but I thought I'd do that as a separate commit. Tested by David Xu, and Dan Eischen using libthr and libpthread.
198 lines
6.6 KiB
C
198 lines
6.6 KiB
C
/*-
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* Copyright (c) 1996, 1997
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* HD Associates, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by HD Associates, Inc
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* and Jukka Antero Ukkonen.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 2002, Jeffrey Roberson <jeff@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SCHED_H_
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#define _SCHED_H_
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#ifdef _KERNEL
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/*
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* General scheduling info.
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*
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* sched_load:
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* Total runnable non-ithread threads in the system.
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*
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* sched_runnable:
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* Runnable threads for this processor.
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*/
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int sched_load(void);
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int sched_rr_interval(void);
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int sched_runnable(void);
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/*
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* Proc related scheduling hooks.
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*/
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void sched_exit(struct proc *p, struct thread *childtd);
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void sched_fork(struct thread *td, struct thread *childtd);
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/*
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* KSE Groups contain scheduling priority information. They record the
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* behavior of groups of KSEs and threads.
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*/
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void sched_class(struct thread *td, int class);
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void sched_nice(struct proc *p, int nice);
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/*
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* Threads are switched in and out, block on resources, have temporary
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* priorities inherited from their procs, and use up cpu time.
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*/
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void sched_exit_thread(struct thread *td, struct thread *child);
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void sched_fork_thread(struct thread *td, struct thread *child);
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void sched_lend_prio(struct thread *td, u_char prio);
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void sched_lend_user_prio(struct thread *td, u_char pri);
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fixpt_t sched_pctcpu(struct thread *td);
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void sched_prio(struct thread *td, u_char prio);
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void sched_sleep(struct thread *td);
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void sched_switch(struct thread *td, struct thread *newtd, int flags);
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void sched_unlend_prio(struct thread *td, u_char prio);
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void sched_unlend_user_prio(struct thread *td, u_char pri);
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void sched_user_prio(struct thread *td, u_char prio);
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void sched_userret(struct thread *td);
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void sched_wakeup(struct thread *td);
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/*
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* Threads are moved on and off of run queues
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*/
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void sched_add(struct thread *td, int flags);
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void sched_clock(struct thread *td);
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void sched_rem(struct thread *td);
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void sched_tick(void);
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void sched_relinquish(struct thread *td);
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/*
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* Binding makes cpu affinity permanent while pinning is used to temporarily
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* hold a thread on a particular CPU.
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*/
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void sched_bind(struct thread *td, int cpu);
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static __inline void sched_pin(void);
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void sched_unbind(struct thread *td);
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static __inline void sched_unpin(void);
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int sched_is_bound(struct thread *td);
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/*
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* These procedures tell the process data structure allocation code how
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* many bytes to actually allocate.
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*/
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int sched_sizeof_proc(void);
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int sched_sizeof_thread(void);
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static __inline void
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sched_pin(void)
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{
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curthread->td_pinned++;
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}
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static __inline void
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sched_unpin(void)
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{
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curthread->td_pinned--;
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}
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/* temporarily here */
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void schedinit(void);
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void sched_init_concurrency(struct proc *p);
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void sched_set_concurrency(struct proc *p, int cuncurrency);
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void sched_schedinit(void);
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void sched_newproc(struct proc *p, struct thread *td);
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void sched_thread_exit(struct thread *td);
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void sched_newthread(struct thread *td);
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#endif /* _KERNEL */
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/* POSIX 1003.1b Process Scheduling */
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/*
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* POSIX scheduling policies
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*/
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#define SCHED_FIFO 1
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#define SCHED_OTHER 2
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#define SCHED_RR 3
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struct sched_param {
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int sched_priority;
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};
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/*
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* POSIX scheduling declarations for userland.
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*/
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#ifndef _KERNEL
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#include <sys/cdefs.h>
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#include <sys/_types.h>
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#ifndef _PID_T_DECLARED
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typedef __pid_t pid_t;
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#define _PID_T_DECLARED
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#endif
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struct timespec;
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__BEGIN_DECLS
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int sched_get_priority_max(int);
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int sched_get_priority_min(int);
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int sched_getparam(pid_t, struct sched_param *);
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int sched_getscheduler(pid_t);
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int sched_rr_get_interval(pid_t, struct timespec *);
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int sched_setparam(pid_t, const struct sched_param *);
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int sched_setscheduler(pid_t, int, const struct sched_param *);
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int sched_yield(void);
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__END_DECLS
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#endif
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#endif /* !_SCHED_H_ */
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