/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
* thread_quantum_expire:
*
* Recalculate the quantum and priority for a thread.
+ *
+ * Called at splsched.
*/
void
timer_call_param_t p0,
timer_call_param_t p1)
{
- register processor_t myprocessor = p0;
- register thread_t thread = p1;
- spl_t s;
+ processor_t processor = p0;
+ thread_t thread = p1;
+ ast_t preempt;
- s = splsched();
thread_lock(thread);
/*
if (!(thread->sched_mode & TH_MODE_TIMESHARE)) {
uint64_t new_computation;
- new_computation = myprocessor->quantum_end;
+ new_computation = processor->quantum_end;
new_computation -= thread->computation_epoch;
if (new_computation + thread->computation_metered >
max_unsafe_computation) {
thread->sched_mode &= ~TH_MODE_REALTIME;
}
- pset_share_incr(thread->processor_set);
+ sched_share_incr();
thread->safe_release = sched_tick + sched_safe_duration;
thread->sched_mode |= (TH_MODE_FAILSAFE|TH_MODE_TIMESHARE);
compute_my_priority(thread);
}
+ processor->current_pri = thread->sched_pri;
+
/*
* This quantum is up, give this thread another.
*/
- if (first_timeslice(myprocessor))
- myprocessor->timeslice--;
+ if (first_timeslice(processor))
+ processor->timeslice--;
thread_quantum_init(thread);
- myprocessor->quantum_end += thread->current_quantum;
- timer_call_enter1(&myprocessor->quantum_timer,
- thread, myprocessor->quantum_end);
-
- thread_unlock(thread);
+ processor->quantum_end += thread->current_quantum;
+ timer_call_enter1(&processor->quantum_timer,
+ thread, processor->quantum_end);
/*
- * Check for and schedule ast if needed.
+ * Context switch check.
*/
- ast_check(myprocessor);
+ if ((preempt = csw_check(thread, processor)) != AST_NONE)
+ ast_on(preempt);
+ else {
+ processor_set_t pset = processor->processor_set;
- splx(s);
+ pset_lock(pset);
+
+ pset_hint_low(pset, processor);
+ pset_hint_high(pset, processor);
+
+ pset_unlock(pset);
+ }
+
+ thread_unlock(thread);
}
/*
register int priority;
do_priority_computation(thread, priority);
- assert(thread->runq == RUN_QUEUE_NULL);
+ assert(thread->runq == PROCESSOR_NULL);
thread->sched_pri = priority;
}
ticks = sched_tick - thread->sched_stamp;
assert(ticks != 0);
thread->sched_stamp += ticks;
- thread->pri_shift = thread->processor_set->pri_shift;
+ thread->pri_shift = sched_pri_shift;
/*
* Gather cpu usage data.
thread->sched_mode &= ~TH_MODE_TIMESHARE;
- if (thread->state & TH_RUN)
- pset_share_decr(thread->processor_set);
+ if ((thread->state & (TH_RUN|TH_IDLE)) == TH_RUN)
+ sched_share_decr();
if (!(thread->sched_mode & TH_MODE_ISDEPRESSED))
set_sched_pri(thread, thread->priority);
do_priority_computation(thread, new_pri);
if (new_pri != thread->sched_pri) {
- run_queue_t runq;
+ boolean_t removed = run_queue_remove(thread);
- runq = run_queue_remove(thread);
thread->sched_pri = new_pri;
- if (runq != RUN_QUEUE_NULL)
+ if (removed)
thread_setrun(thread, SCHED_TAILQ);
}
}
projects / apple / xnu.git / blobdiff