/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2009 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@
#include <mach/mach_types.h>
#include <kern/ast.h>
#include <kern/cpu_number.h>
-#include <kern/lock.h>
+#include <kern/smp.h>
+#include <kern/simple_lock.h>
+#include <kern/locks.h>
#include <kern/queue.h>
#include <kern/sched.h>
+#include <mach/sfi_class.h>
#include <kern/processor_data.h>
-#include <machine/ast_types.h>
-
struct processor_set {
- queue_head_t idle_queue; /* idle processors */
- int idle_count; /* how many ? */
queue_head_t active_queue; /* active processors */
-
- queue_head_t processors; /* all processors here */
- int processor_count;/* how many ? */
- decl_simple_lock_data(,sched_lock) /* lock for runq and above */
-
- struct run_queue runq; /* runq for this set */
-
- queue_head_t tasks; /* tasks assigned */
- int task_count; /* how many */
- queue_head_t threads; /* threads in this set */
- int thread_count; /* how many */
- int ref_count; /* structure ref count */
- boolean_t active; /* is pset in use */
- decl_mutex_data(, lock) /* lock for above */
-
- int timeshare_quanta; /* timeshare quantum factor */
+ queue_head_t idle_queue; /* idle processors */
+ queue_head_t idle_secondary_queue; /* idle secondary processors */
+
+ int online_processor_count;
+
+ int cpu_set_low, cpu_set_hi;
+ int cpu_set_count;
+
+#if __SMP__
+ decl_simple_lock_data(,sched_lock) /* lock for above */
+#endif
+
+#if defined(CONFIG_SCHED_TRADITIONAL) || defined(CONFIG_SCHED_MULTIQ)
+ struct run_queue pset_runq; /* runq for this processor set */
+#endif
+
+#if defined(CONFIG_SCHED_TRADITIONAL)
+ int pset_runq_bound_count;
+ /* # of threads in runq bound to any processor in pset */
+#endif
+
+ /* CPUs that have been sent an unacknowledged remote AST for scheduling purposes */
+ uint64_t pending_AST_cpu_mask;
+#if defined(CONFIG_SCHED_DEFERRED_AST)
+ /*
+ * A seperate mask, for ASTs that we may be able to cancel. This is dependent on
+ * some level of support for requesting an AST on a processor, and then quashing
+ * that request later.
+ *
+ * The purpose of this field (and the associated codepaths) is to infer when we
+ * no longer need a processor that is DISPATCHING to come up, and to prevent it
+ * from coming out of IDLE if possible. This should serve to decrease the number
+ * of spurious ASTs in the system, and let processors spend longer periods in
+ * IDLE.
+ */
+ uint64_t pending_deferred_AST_cpu_mask;
+#endif
struct ipc_port * pset_self; /* port for operations */
struct ipc_port * pset_name_self; /* port for information */
- uint32_t run_count; /* threads running in set */
- uint32_t share_count; /* timeshare threads running in set */
+ processor_set_t pset_list; /* chain of associated psets */
+ pset_node_t node;
+};
+
+extern struct processor_set pset0;
- integer_t mach_factor; /* mach_factor */
- integer_t load_average; /* load_average */
+struct pset_node {
+ processor_set_t psets; /* list of associated psets */
- uint32_t pri_shift; /* timeshare usage -> priority */
+ pset_node_t nodes; /* list of associated subnodes */
+ pset_node_t node_list; /* chain of associated nodes */
+
+ pset_node_t parent;
};
-extern struct processor_set default_pset;
+extern struct pset_node pset_node0;
+
+extern queue_head_t tasks, terminated_tasks, threads; /* Terminated tasks are ONLY for stackshot */
+extern int tasks_count, terminated_tasks_count, threads_count;
+decl_lck_mtx_data(extern,tasks_threads_lock)
struct processor {
queue_chain_t processor_queue;/* idle/active queue link,
* MUST remain the first element */
int state; /* See below */
+ boolean_t is_SMT;
+ boolean_t is_recommended;
struct thread
*active_thread, /* thread running on processor */
*next_thread, /* next thread when dispatched */
*idle_thread; /* this processor's idle thread. */
- processor_set_t processor_set; /* current membership */
+ processor_set_t processor_set; /* assigned set */
int current_pri; /* priority of current thread */
+ sched_mode_t current_thmode; /* sched mode of current thread */
+ sfi_class_id_t current_sfi_class; /* SFI class of current thread */
+ int cpu_id; /* platform numeric id */
timer_call_data_t quantum_timer; /* timer for quantum expiration */
uint64_t quantum_end; /* time when current quantum ends */
uint64_t last_dispatch; /* time of last dispatch */
- int timeslice; /* quanta before timeslice ends */
uint64_t deadline; /* current deadline */
-
- struct run_queue runq; /* local runq for this processor */
-
- queue_chain_t processors; /* processors in set */
- decl_simple_lock_data(,lock)
+ boolean_t first_timeslice; /* has the quantum expired since context switch */
+
+#if defined(CONFIG_SCHED_TRADITIONAL) || defined(CONFIG_SCHED_MULTIQ)
+ struct run_queue runq; /* runq for this processor */
+#endif
+
+#if defined(CONFIG_SCHED_TRADITIONAL)
+ int runq_bound_count; /* # of threads bound to this processor */
+#endif
+#if defined(CONFIG_SCHED_GRRR)
+ struct grrr_run_queue grrr_runq; /* Group Ratio Round-Robin runq */
+#endif
+
+ processor_t processor_primary; /* pointer to primary processor for
+ * secondary SMT processors, or a pointer
+ * to ourselves for primaries or non-SMT */
+ processor_t processor_secondary;
struct ipc_port * processor_self; /* port for operations */
+
processor_t processor_list; /* all existing processors */
processor_data_t processor_data; /* per-processor data */
};
extern unsigned int processor_count;
decl_simple_lock_data(extern,processor_list_lock)
-extern processor_t master_processor;
+extern uint32_t processor_avail_count;
+
+extern processor_t master_processor;
+
+extern boolean_t sched_stats_active;
/*
- * NOTE: The processor->processor_set link is needed in one of the
- * scheduler's critical paths. [Figure out where to look for another
- * thread to run on this processor.] It is accessed without locking.
- * The following access protocol controls this field.
+ * Processor state is accessed by locking the scheduling lock
+ * for the assigned processor set.
*
- * Read from own processor - just read.
- * Read from another processor - lock processor structure during read.
- * Write from own processor - lock processor structure during write.
- * Write from another processor - NOT PERMITTED.
+ * -------------------- SHUTDOWN
+ * / ^ ^
+ * _/ | \
+ * OFF_LINE ---> START ---> RUNNING ---> IDLE ---> DISPATCHING
+ * \_________________^ ^ ^______/ /
+ * \__________________/
*
+ * Most of these state transitions are externally driven as a
+ * a directive (for instance telling an IDLE processor to start
+ * coming out of the idle state to run a thread). However these
+ * are typically paired with a handshake by the processor itself
+ * to indicate that it has completed a transition of indeterminate
+ * length (for example, the DISPATCHING->RUNNING or START->RUNNING
+ * transitions must occur on the processor itself).
+ *
+ * The boot processor has some special cases, and skips the START state,
+ * since it has already bootstrapped and is ready to context switch threads.
+ *
+ * When a processor is in DISPATCHING or RUNNING state, the current_pri,
+ * current_thmode, and deadline fields should be set, so that other
+ * processors can evaluate if it is an appropriate candidate for preemption.
*/
-
+#if defined(CONFIG_SCHED_DEFERRED_AST)
/*
- * Processor state locking:
+ * -------------------- SHUTDOWN
+ * / ^ ^
+ * _/ | \
+ * OFF_LINE ---> START ---> RUNNING ---> IDLE ---> DISPATCHING
+ * \_________________^ ^ ^______/ ^_____ / /
+ * \__________________/
*
- * Values for the processor state are defined below. If the processor
- * is off-line or being shutdown, then it is only necessary to lock
- * the processor to change its state. Otherwise it is only necessary
- * to lock its processor set's sched_lock. Scheduler code will
- * typically lock only the sched_lock, but processor manipulation code
- * will often lock both.
+ * A DISPATCHING processor may be put back into IDLE, if another
+ * processor determines that the target processor will have nothing to do
+ * upon reaching the RUNNING state. This is racy, but if the target
+ * responds and becomes RUNNING, it will not break the processor state
+ * machine.
+ *
+ * This change allows us to cancel an outstanding signal/AST on a processor
+ * (if such an operation is supported through hardware or software), and
+ * push the processor back into the IDLE state as a power optimization.
*/
+#endif
#define PROCESSOR_OFF_LINE 0 /* Not available */
-#define PROCESSOR_RUNNING 1 /* Normal execution */
-#define PROCESSOR_IDLE 2 /* Idle */
-#define PROCESSOR_DISPATCHING 3 /* Dispatching (idle -> running) */
-#define PROCESSOR_SHUTDOWN 4 /* Going off-line */
-#define PROCESSOR_START 5 /* Being started */
+#define PROCESSOR_SHUTDOWN 1 /* Going off-line */
+#define PROCESSOR_START 2 /* Being started */
+/* 3 Formerly Inactive (unavailable) */
+#define PROCESSOR_IDLE 4 /* Idle (available) */
+#define PROCESSOR_DISPATCHING 5 /* Dispatching (idle -> active) */
+#define PROCESSOR_RUNNING 6 /* Normal execution */
extern processor_t current_processor(void);
-extern processor_t cpu_to_processor(
- int cpu);
-
-/* Useful lock macros */
-
-#define pset_lock(pset) mutex_lock(&(pset)->lock)
-#define pset_lock_try(pset) mutex_try(&(pset)->lock)
-#define pset_unlock(pset) mutex_unlock(&(pset)->lock)
+/* Lock macros, always acquired and released with interrupts disabled (splsched()) */
-#define processor_lock(pr) simple_lock(&(pr)->lock)
-#define processor_unlock(pr) simple_unlock(&(pr)->lock)
+#if __SMP__
+#define pset_lock(p) simple_lock(&(p)->sched_lock)
+#define pset_unlock(p) simple_unlock(&(p)->sched_lock)
+#define pset_lock_init(p) simple_lock_init(&(p)->sched_lock, 0)
+#else
+#define pset_lock(p) do { (void)p; } while(0)
+#define pset_unlock(p) do { (void)p; } while(0)
+#define pset_lock_init(p) do { (void)p; } while(0)
+#endif
extern void processor_bootstrap(void);
extern void processor_init(
processor_t processor,
- int slot_num);
-
-extern void timeshare_quanta_update(
- processor_set_t pset);
-
-extern void pset_init(
- processor_set_t pset);
+ int cpu_id,
+ processor_set_t processor_set);
-#define pset_run_incr(pset) \
- hw_atomic_add(&(pset)->run_count, 1)
-
-#define pset_run_decr(pset) \
- hw_atomic_sub(&(pset)->run_count, 1)
+extern void processor_set_primary(
+ processor_t processor,
+ processor_t primary);
-#define pset_share_incr(pset) \
- hw_atomic_add(&(pset)->share_count, 1)
+extern kern_return_t processor_shutdown(
+ processor_t processor);
-#define pset_share_decr(pset) \
- hw_atomic_sub(&(pset)->share_count, 1)
+extern void processor_queue_shutdown(
+ processor_t processor);
-extern kern_return_t processor_shutdown(
+extern processor_set_t processor_pset(
processor_t processor);
-extern void pset_remove_processor(
- processor_set_t pset,
- processor_t processor);
+extern pset_node_t pset_node_root(void);
-extern void pset_add_processor(
- processor_set_t pset,
- processor_t processor);
+extern processor_set_t pset_create(
+ pset_node_t node);
-extern void pset_remove_task(
+extern void pset_init(
processor_set_t pset,
- task_t task);
+ pset_node_t node);
-extern void pset_add_task(
- processor_set_t pset,
- task_t task);
+extern kern_return_t processor_info_count(
+ processor_flavor_t flavor,
+ mach_msg_type_number_t *count);
-extern void pset_remove_thread(
- processor_set_t pset,
- thread_t thread);
+#define pset_deallocate(x)
+#define pset_reference(x)
-extern void pset_add_thread(
- processor_set_t pset,
- thread_t thread);
+extern void machine_run_count(
+ uint32_t count);
-extern void thread_change_psets(
- thread_t thread,
- processor_set_t old_pset,
- processor_set_t new_pset);
+extern processor_t machine_choose_processor(
+ processor_set_t pset,
+ processor_t processor);
+#define next_pset(p) (((p)->pset_list != PROCESSOR_SET_NULL)? (p)->pset_list: (p)->node->psets)
-extern kern_return_t processor_info_count(
- processor_flavor_t flavor,
- mach_msg_type_number_t *count);
+#define PSET_THING_TASK 0
+#define PSET_THING_THREAD 1
-#endif /* MACH_KERNEL_PRIVATE */
+extern kern_return_t processor_set_things(
+ processor_set_t pset,
+ void **thing_list,
+ mach_msg_type_number_t *count,
+ int type);
+
+#else /* MACH_KERNEL_PRIVATE */
__BEGIN_DECLS
__END_DECLS
+#endif /* MACH_KERNEL_PRIVATE */
+
+#ifdef KERNEL_PRIVATE
+__BEGIN_DECLS
+extern processor_t cpu_to_processor(int cpu);
+__END_DECLS
+
+#endif /* KERNEL_PRIVATE */
+
#endif /* _KERN_PROCESSOR_H_ */
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