#define MAXPRI (NRQS-1)
#define MINPRI IDLEPRI /* lowest legal priority schedulable */
#define IDLEPRI 0 /* idle thread priority */
-#define DEPRESSPRI MINPRI /* depress priority */
/*
* High-level priority assignments
#define BASEPRI_FOREGROUND (BASEPRI_DEFAULT + 16) /* 47 */
#define BASEPRI_BACKGROUND (BASEPRI_DEFAULT + 15) /* 46 */
#define BASEPRI_DEFAULT (MAXPRI_USER - (NRQS / 4)) /* 31 */
+#define MAXPRI_THROTTLE (MINPRI + 4) /* 4 */
#define MINPRI_USER MINPRI /* 0 */
+#ifdef CONFIG_EMBEDDED
+#define DEPRESSPRI MAXPRI_THROTTLE
+#else
+#define DEPRESSPRI MINPRI /* depress priority */
+#endif
+
+/* Type used for thread->sched_mode and saved_mode */
+typedef enum {
+ TH_MODE_NONE = 0, /* unassigned, usually for saved_mode only */
+ TH_MODE_REALTIME, /* time constraints supplied */
+ TH_MODE_FIXED, /* use fixed priorities, no decay */
+ TH_MODE_TIMESHARE, /* use timesharing algorithm */
+ TH_MODE_FAIRSHARE /* use fair-share scheduling */
+} sched_mode_t;
+
/*
* Macro to check for invalid priorities.
*/
#define invalid_pri(pri) ((pri) < MINPRI || (pri) > MAXPRI)
+struct runq_stats {
+ uint64_t count_sum;
+ uint64_t last_change_timestamp;
+};
+
+#if defined(CONFIG_SCHED_TRADITIONAL) || defined(CONFIG_SCHED_PROTO) || defined(CONFIG_SCHED_FIXEDPRIORITY)
+
struct run_queue {
int highq; /* highest runnable queue */
int bitmap[NRQBM]; /* run queue bitmap array */
int count; /* # of threads total */
int urgency; /* level of preemption urgency */
queue_head_t queues[NRQS]; /* one for each priority */
+
+ struct runq_stats runq_stats;
};
-typedef struct run_queue *run_queue_t;
-#define RUN_QUEUE_NULL ((run_queue_t) 0)
+#endif /* defined(CONFIG_SCHED_TRADITIONAL) || defined(CONFIG_SCHED_PROTO) || defined(CONFIG_SCHED_FIXEDPRIORITY) */
-#define first_timeslice(processor) ((processor)->timeslice > 0)
+struct rt_queue {
+ int count; /* # of threads total */
+ queue_head_t queue; /* all runnable RT threads */
-#define thread_quantum_init(thread) \
-MACRO_BEGIN \
- (thread)->current_quantum = \
- ((thread)->sched_mode & TH_MODE_REALTIME)? \
- (thread)->realtime.computation: std_quantum; \
-MACRO_END
+ struct runq_stats runq_stats;
+};
-extern struct run_queue rt_runq;
+#if defined(CONFIG_SCHED_TRADITIONAL) || defined(CONFIG_SCHED_PROTO) || defined(CONFIG_SCHED_FIXEDPRIORITY)
+struct fairshare_queue {
+ int count; /* # of threads total */
+ queue_head_t queue; /* all runnable threads demoted to fairshare scheduling */
+
+ struct runq_stats runq_stats;
+};
+#endif
+
+#if defined(CONFIG_SCHED_GRRR_CORE)
/*
- * Scheduler routines.
+ * We map standard Mach priorities to an abstract scale that more properly
+ * indicates how we want processor time allocated under contention.
*/
+typedef uint8_t grrr_proportional_priority_t;
+typedef uint8_t grrr_group_index_t;
+
+#define NUM_GRRR_PROPORTIONAL_PRIORITIES 256
+#define MAX_GRRR_PROPORTIONAL_PRIORITY ((grrr_proportional_priority_t)255)
+
+#if 0
+#define NUM_GRRR_GROUPS 8 /* log(256) */
+#endif
+
+#define NUM_GRRR_GROUPS 64 /* 256/4 */
+
+struct grrr_group {
+ queue_chain_t priority_order; /* next greatest weight group */
+ grrr_proportional_priority_t minpriority;
+ grrr_group_index_t index;
+
+ queue_head_t clients;
+ int count;
+ uint32_t weight;
+#if 0
+ uint32_t deferred_removal_weight;
+#endif
+ uint32_t work;
+ thread_t current_client;
+};
-/* Remove thread from its run queue */
-extern boolean_t run_queue_remove(
- thread_t thread);
+struct grrr_run_queue {
+ int count;
+ uint32_t last_rescale_tick;
+ struct grrr_group groups[NUM_GRRR_GROUPS];
+ queue_head_t sorted_group_list;
+ uint32_t weight;
+ grrr_group_t current_group;
+
+ struct runq_stats runq_stats;
+};
+
+#endif /* defined(CONFIG_SCHED_GRRR_CORE) */
+
+#define first_timeslice(processor) ((processor)->timeslice > 0)
+
+extern struct rt_queue rt_runq;
+
+/*
+ * Scheduler routines.
+ */
/* Handle quantum expiration for an executing thread */
extern void thread_quantum_expire(
/* Context switch check for current processor */
extern ast_t csw_check(processor_t processor);
+#if defined(CONFIG_SCHED_TRADITIONAL)
extern uint32_t std_quantum, min_std_quantum;
extern uint32_t std_quantum_us;
+#endif
+
+extern uint32_t thread_depress_time;
+extern uint32_t default_timeshare_computation;
+extern uint32_t default_timeshare_constraint;
extern uint32_t max_rt_quantum, min_rt_quantum;
extern uint32_t sched_cswtime;
+#if defined(CONFIG_SCHED_TRADITIONAL)
+
/*
* Age usage (1 << SCHED_TICK_SHIFT) times per second.
*/
extern unsigned sched_tick;
extern uint32_t sched_tick_interval;
+#endif /* CONFIG_SCHED_TRADITIONAL */
+
+extern uint64_t sched_one_second_interval;
+
/* Periodic computation of various averages */
extern void compute_averages(void);
extern void compute_memory_pressure(
void *arg);
+extern void compute_zone_gc_throttle(
+ void *arg);
+
+extern void compute_pmap_gc_throttle(
+ void *arg);
+
/*
* Conversion factor from usage
* to priority.
*/
+#if defined(CONFIG_SCHED_TRADITIONAL)
extern uint32_t sched_pri_shift;
extern uint32_t sched_fixed_shift;
extern int8_t sched_load_shifts[NRQS];
+#endif
extern int32_t sched_poll_yield_shift;
-extern uint32_t sched_safe_duration;
+extern uint64_t sched_safe_duration;
extern uint32_t sched_run_count, sched_share_count;
extern uint32_t sched_load_average, sched_mach_factor;
extern uint64_t max_poll_computation;
#define sched_run_incr() \
-MACRO_BEGIN \
- machine_run_count(hw_atomic_add(&sched_run_count, 1)); \
+MACRO_BEGIN \
+ hw_atomic_add(&sched_run_count, 1); \
MACRO_END
#define sched_run_decr() \
-MACRO_BEGIN \
- machine_run_count(hw_atomic_sub(&sched_run_count, 1)); \
+MACRO_BEGIN \
+ hw_atomic_sub(&sched_run_count, 1); \
MACRO_END
#define sched_share_incr() \
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